Alert archive / Washington / Excessive Heat Warnings in 2021

Excessive Heat Warning 2, NWS Seattle, WA

August 10, 2021

NWS Seattle, WA issued this excessive heat warning at Aug 10, 2021, 2:44 PM PDT. It took effect at Aug 11, 2021, 12:00 PM PDT. It was in force for 72 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 10, 2021, 2:44 PM PDT (21:44 UTC)
In effect from
Aug 11, 2021, 12:00 PM PDT
Expired
Aug 14, 2021, 11:56 AM PDT
In force
72 hr
Issued by
NWS Seattle, WA

The text

As transmitted.

426 
WWUS76 KSEW 102144
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
244 PM PDT Tue Aug 10 2021

WAZ504-509-555-556-558-567>569-111300-
/O.UPG.KSEW.EH.A.0002.210811T1900Z-210815T0600Z/
/O.NEW.KSEW.EH.W.0002.210811T1900Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
244 PM PDT Tue Aug 10 2021

...EXCESSIVE HEAT WARNING IN EFFECT FROM NOON WEDNESDAY TO 7 PM
PDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s on Wednesday and 90s to near 100 degrees through
  Saturday. Hottest temperatures over the Southwest Interior, 
  Cascade foothills, and Cascade Valleys. 
 
* WHERE...Southwest Interior, Tacoma Area, East Puget Sound 
  Lowlands, Bellevue and Vicinity, Seattle and Vicinity, 
  Cascades of Whatcom and Skagit Counties, Cascades of Snohomish 
  and King Counties and Cascades of Pierce and Lewis Counties.

* WHEN...From noon Wednesday to 7 PM PDT Saturday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and
  Saturday morning will be poor across Eastern Puget Sound, the
  adjacent Cascade foothills, and the Seattle metro areas away
  from the water. Overnight temperatures will remain in the 70s,
  and only briefly drop into the mid-upper 60s late overnight. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ503-506-507-511-512-559-111300-
/O.UPG.KSEW.EH.A.0002.210811T1900Z-210815T0600Z/
/O.NEW.KSEW.EH.W.0002.210811T1900Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
244 PM PDT Tue Aug 10 2021

...EXCESSIVE HEAT WARNING IN EFFECT FROM NOON WEDNESDAY TO 8 PM
PDT FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s on Wednesday and 90s to near 100 degrees through Friday.
  Hottest temperatures over the Lower Chehalis Valley. 
  Temperatures will cool on Saturday. 
 
* WHERE...Western Whatcom County, Western Skagit County, Everett 
  and Vicinity, Hood Canal Area, Lower Chehalis Valley Area and 
  Bremerton and Vicinity.

* WHEN...From noon Wednesday to 8 PM PDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief Thursday and Friday and
  morning will be poor across the area especially in urban centers
  away from the water. Overnight lows will only drop into the mid
  60s.
 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-111300-
/O.UPG.KSEW.EH.A.0002.210811T1900Z-210815T0600Z/
/O.NEW.KSEW.HT.Y.0002.210811T1900Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
244 PM PDT Tue Aug 10 2021

...HEAT ADVISORY IN EFFECT FROM NOON WEDNESDAY TO 8 PM PDT
FRIDAY...

* WHAT...Hot temperatures rising into the lower 90s from Wednesday
  through Friday afternoon.

* WHERE...Olympics.

* WHEN...From noon Wednesday to 8 PM PDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low
  temperatures in the low-mid 60s in the early morning hours of
  Thursday and Friday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ516-111300-
/O.NEW.KSEW.HT.Y.0002.210811T1900Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
244 PM PDT Tue Aug 10 2021

...HEAT ADVISORY IN EFFECT FROM NOON WEDNESDAY TO 8 PM PDT
THURSDAY...

* WHAT...High temperatures in the upper 80s to low 90s are
  expected Wednesday and Thursday afternoons. The hottest
  temperatures are expected across areas well inland. Conditions 
  on the immediate coastline will be significantly cooler. 

* WHERE...North Coast.

* WHEN...From noon Wednesday to 8 PM PDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Low temperatures will cool only to the 
  lower and mid 60s. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
10 follow-up statements
486 
WWUS76 KSEW 111118
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
418 AM PDT Wed Aug 11 2021

WAZ504-509-555-556-558-567>569-120000-
/O.CON.KSEW.EH.W.0002.210811T1900Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
418 AM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO
7 PM PDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the mid 80s to lower 90s today, 90s to near 100 degrees 
  Thursday and Friday. Highs still near 90 Saturday. Hottest 
  temperatures over the Southwest Interior, Cascade foothills, and
  Cascade Valleys.

* WHERE...Southwest Interior, Tacoma Area, East Puget Sound 
  Lowlands, Bellevue and Vicinity, Seattle and Vicinity, 
  Cascades of Whatcom and Skagit Counties, Cascades of Snohomish 
  and King Counties and Cascades of Pierce and Lewis Counties.

* WHEN...From noon today to 7 PM PDT Saturday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and
  Saturday morning will be poor across Eastern Puget Sound, the
  adjacent Cascade foothills, and the Seattle metro areas away
  from the water. Overnight temperatures will remain in the 70s,
  and only briefly drop into the mid to upper 60s late overnight.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ503-506-507-511-512-559-120000-
/O.CON.KSEW.EH.W.0002.210811T1900Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
418 AM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO
8 PM PDT FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the mid 80s to lower 90s today and mid 80s to upper 90s Thursday
  and Friday. Hottest temperatures over the Lower Chehalis 
  Valley. Temperatures will cool on Saturday.

* WHERE...Western Whatcom County, Western Skagit County, Everett 
  and Vicinity, Hood Canal Area, Lower Chehalis Valley Area and 
  Bremerton and Vicinity.

* WHEN...From noon today to 8 PM PDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief Thursday and Friday and 
  morning will be poor across the area especially in urban centers
  away from the water. Overnight lows will only drop into the mid
  60s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ516-120000-
/O.CON.KSEW.HT.Y.0002.210811T1900Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
418 AM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM PDT
THURSDAY...

* WHAT...High temperatures in the lower to mid 80s today and mid
  80s to mid 90s Thursday. Conditions on the immediate coastline 
  will be significantly cooler.

* WHERE...North Coast.

* WHEN...From noon Wednesday to 8 PM PDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Low temperatures will cool only to the
  lower and mid 60s. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-120000-
/O.CON.KSEW.HT.Y.0002.210811T1900Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
418 AM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM PDT
FRIDAY...

* WHAT...Hot temperatures rising into the mid 80s to lower 90s
  today with temperatures as warm as the mid 90s Thursday and
  Friday. 

* WHERE...Olympics.

* WHEN...From noon Wednesday to 8 PM PDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low
  temperatures in the low-mid 60s in the early morning hours of
  Thursday and Friday. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
455 
WWUS76 KSEW 111205 CCA
NPWSEW

URGENT - WEATHER MESSAGE...CORRECTED
National Weather Service Seattle WA
505 AM PDT Wed Aug 11 2021

WAZ504-509-555-556-558-567>569-120000-
/O.COR.KSEW.EH.W.0002.210811T1900Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
505 AM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO
7 PM PDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the mid 80s to lower 90s today, 90s to near 100 degrees 
  Thursday and Friday. Highs still near 90 Saturday. Hottest 
  temperatures over the Southwest Interior, Cascade foothills, and
  Cascade Valleys.

* WHERE...Southwest Interior, Tacoma Area, East Puget Sound 
  Lowlands, Bellevue and Vicinity, Seattle and Vicinity, 
  Cascades of Whatcom and Skagit Counties, Cascades of Snohomish 
  and King Counties and Cascades of Pierce and Lewis Counties.

* WHEN...From noon today to 7 PM PDT Saturday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and
  Saturday morning will be poor across Eastern Puget Sound, the
  adjacent Cascade foothills, and the Seattle metro areas away
  from the water. Overnight temperatures will remain in the 70s,
  and only briefly drop into the mid to upper 60s late overnight.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ503-506-507-511-512-559-120000-
/O.COR.KSEW.EH.W.0002.210811T1900Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
505 AM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO
8 PM PDT FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the mid 80s to lower 90s today and mid 80s to upper 90s Thursday
  and Friday. Hottest temperatures over the Lower Chehalis 
  Valley. Temperatures will cool on Saturday.

* WHERE...Western Whatcom County, Western Skagit County, Everett 
  and Vicinity, Hood Canal Area, Lower Chehalis Valley Area and 
  Bremerton and Vicinity.

* WHEN...From noon today to 8 PM PDT Friday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Nighttime relief Thursday and Friday and 
  morning will be poor across the area especially in urban centers
  away from the water. Overnight lows will only drop into the mid
  60s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ516-120000-
/O.COR.KSEW.HT.Y.0002.210811T1900Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
505 AM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM PDT
THURSDAY...

* WHAT...High temperatures in the lower to mid 80s today and mid
  80s to mid 90s Thursday. Conditions on the immediate coastline 
  will be significantly cooler.

* WHERE...North Coast.

* WHEN...From noon Wednesday to 8 PM PDT Thursday.

* IMPACTS...Hot temperatures may cause heat illnesses to occur.

* ADDITIONAL DETAILS...Low temperatures will cool only to the
  lower and mid 60s. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-120000-
/O.COR.KSEW.HT.Y.0002.210811T1900Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
505 AM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM PDT
FRIDAY...

* WHAT...Hot temperatures rising into the mid 80s to lower 90s
  today with temperatures as warm as the mid 90s Thursday and
  Friday. 

* WHERE...Olympics.

* WHEN...From noon Wednesday to 8 PM PDT Friday.

* IMPACTS...Hot temperatures may cause heat illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low
  temperatures in the low-mid 60s in the early morning hours of
  Thursday and Friday. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
770 
WWUS76 KSEW 112151
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
251 PM PDT Wed Aug 11 2021

WAZ503-506-507-511-512-559-120600-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
251 PM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the mid 80s to lower 90s today, 90s to near 100 degrees 
  Thursday and Friday. Highs still near 90 Saturday. Hottest 
  temperatures over the Southwest Interior, Cascade foothills, and
  Cascade Valleys.

* WHERE...Lower Chehalis Valley Area, Western Whatcom County, 
  Hood Canal Area, Everett and Vicinity, Western Skagit County 
  and Bremerton and Vicinity.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and
  Saturday morning will be poor across Eastern Puget Sound, the
  adjacent Cascade foothills, and the Seattle metro areas away
  from the water. Overnight temperatures will remain in the 70s,
  and only briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ504-509-555-556-558-567>569-120600-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
251 PM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT
SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the mid 80s to lower 90s today, 90s to near 100 degrees 
  Thursday and Friday. Highs still near 90 Saturday. Hottest 
  temperatures over the Southwest Interior, Cascade foothills, and
  Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Southwest Interior, Cascades of 
  Whatcom and Skagit Counties and Seattle and Vicinity.

* WHEN...Until 7 PM PDT Saturday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and
  Saturday morning will be poor across Eastern Puget Sound, the
  adjacent Cascade foothills, and the Seattle metro areas away
  from the water. Overnight temperatures will remain in the 70s,
  and only briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ516-120600-
/O.CON.KSEW.HT.Y.0002.000000T0000Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
251 PM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...

* WHAT...High temperatures in the lower to mid 80s today and mid
  80s to mid 90s Thursday. Conditions on the immediate coastline 
  will be significantly cooler.

* WHERE...North Coast.

* WHEN...Until 8 PM PDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Low temperatures will cool only to the
  lower and mid 60s. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-120600-
/O.CON.KSEW.HT.Y.0002.000000T0000Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
251 PM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Hot temperatures rising into the mid 80s to lower 90s
  today with temperatures as warm as the mid 90s Thursday and
  Friday. 

* WHERE...Olympics.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low
  temperatures in the low-mid 60s in the early morning hours of
  Thursday and Friday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
024 
WWUS76 KSEW 120548
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
1048 PM PDT Wed Aug 11 2021

WAZ503-506-507-511-512-559-130600-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
1048 PM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s to near 100 degrees Thursday and Friday. Highs still 
  near 90 Saturday. Hottest temperatures over the Southwest 
  Interior, Cascade foothills, and Cascade Valleys.

* WHERE...Lower Chehalis Valley Area, Western Whatcom County, 
  Hood Canal Area, Everett and Vicinity, Western Skagit County 
  and Bremerton and Vicinity.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and 
  Saturday morning will be poor across Eastern Puget Sound, the 
  adjacent Cascade foothills, and the Seattle metro areas away 
  from the water. Overnight temperatures will remain in the 70s, 
  and only briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ504-509-555-556-558-567>569-130600-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
1048 PM PDT Wed Aug 11 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT
SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s to near 100 degrees Thursday and Friday. Highs still 
  near 90 Saturday. Hottest temperatures over the Southwest 
  Interior, Cascade foothills, and Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Southwest Interior, Cascades of 
  Whatcom and Skagit Counties and Seattle and Vicinity.

* WHEN...Until 7 PM PDT Saturday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and 
  Saturday morning will be poor across Eastern Puget Sound, the 
  adjacent Cascade foothills, and the Seattle metro areas away 
  from the water. Overnight temperatures will remain in the 70s, 
  and only briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ516-130300-
/O.CON.KSEW.HT.Y.0002.000000T0000Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
1048 PM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...

* WHAT...High temperatures in the mid 80s to mid 90s Thursday. 
  Conditions on the immediate coastline will be significantly 
  cooler.

* WHERE...North Coast.

* WHEN...Until 8 PM PDT Thursday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Low temperatures will cool only to the 
  lower and mid 60s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-130600-
/O.CON.KSEW.HT.Y.0002.000000T0000Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
1048 PM PDT Wed Aug 11 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Hot temperatures rising into the mid 90s Thursday and 
  Friday.

* WHERE...Olympics.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low 
  temperatures in the low-mid 60s in the early morning hours of 
  Thursday and Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
504 
WWUS76 KSEW 121132 CCA
NPWSEW

URGENT - WEATHER MESSAGE...CORRECTED
National Weather Service Seattle WA
432 AM PDT Thu Aug 12 2021

WAZ503-506-507-511-512-559-130600-
/O.COR.KSEW.EH.W.0002.000000T0000Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
432 AM PDT Thu Aug 12 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s to near 100 degrees Thursday and Friday. Highs still 
  near 90 Saturday. Hottest temperatures over the Southwest 
  Interior, Cascade foothills, and Cascade Valleys.

* WHERE...Lower Chehalis Valley Area, Western Whatcom County, 
  Hood Canal Area, Everett and Vicinity, Western Skagit County 
  and Bremerton and Vicinity.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and 
  Saturday morning will be poor across Eastern Puget Sound, the 
  adjacent Cascade foothills, and the Seattle metro areas away 
  from the water. Overnight temperatures will remain in the 70s, 
  and only briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ504-509-555-556-558-567>569-130600-
/O.COR.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
432 AM PDT Thu Aug 12 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT
SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s to near 100 degrees Thursday and Friday. Highs still 
  near 90 Saturday. Hottest temperatures over the Southwest 
  Interior, Cascade foothills, and Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Southwest Interior, Cascades of 
  Whatcom and Skagit Counties and Seattle and Vicinity.

* WHEN...Until 7 PM PDT Saturday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Nighttime relief on Thursday, Friday and 
  Saturday morning will be poor across Eastern Puget Sound, the 
  adjacent Cascade foothills, and the Seattle metro areas away 
  from the water. Overnight temperatures will remain in the 70s, 
  and only briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ516-130300-
/O.COR.KSEW.HT.Y.0002.000000T0000Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
432 AM PDT Thu Aug 12 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY...

* WHAT...High temperatures in the mid 80s to mid 90s Thursday. 
  Conditions on the immediate coastline will be significantly 
  cooler.

* WHERE...North Coast.

* WHEN...Until 8 PM PDT Thursday.

* IMPACTS...Hot temperatures may cause heat illnesses to occur.

* ADDITIONAL DETAILS...Low temperatures will cool only to the 
  lower and mid 60s.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-130600-
/O.COR.KSEW.HT.Y.0002.000000T0000Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
432 AM PDT Thu Aug 12 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Hot temperatures rising into the mid 90s Thursday and 
  Friday.

* WHERE...Olympics.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Hot temperatures may cause heat illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low 
  temperatures in the low-mid 60s in the early morning hours of 
  Thursday and Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
641 
WWUS76 KSEW 130250
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
750 PM PDT Thu Aug 12 2021

WAZ516-130400-
/O.EXP.KSEW.HT.Y.0002.000000T0000Z-210813T0300Z/
North Coast-
Including the cities of Beaver, Clearwater, Forks, La Push, 
Neah Bay, Ozette, and Queets
750 PM PDT Thu Aug 12 2021

...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING...

Temperatures will be cooler Friday and Saturday with westerly
winds keeping highs more in the 70s to lower 80s the next few
days. The heat advisory will expire at 8 PM this evening. 

$$

WAZ503-506-507-511-512-559-140300-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
750 PM PDT Thu Aug 12 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT
FRIDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s to near 100 degrees Friday. Highs still near 90 
  Saturday. Hottest temperatures over the Southwest Interior, 
  Cascade foothills, and Cascade Valleys.

* WHERE...Lower Chehalis Valley Area, Western Whatcom County, 
  Hood Canal Area, Everett and Vicinity, Western Skagit County 
  and Bremerton and Vicinity.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Nighttime relief on Friday and Saturday 
  morning will be poor across Eastern Puget Sound, the adjacent 
  Cascade foothills, and the Seattle metro areas away from the 
  water. Overnight temperatures will remain in the 70s, and only 
  briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ504-509-555-556-558-567>569-140300-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
750 PM PDT Thu Aug 12 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT
SATURDAY...

* WHAT...Dangerously hot conditions with temperatures rising into
  the 90s to near 100 degrees Friday. Highs will remain in the
  lower 90s Saturday. Hottest temperatures over the Southwest 
  Interior, Cascade foothills, and Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Southwest Interior, Cascades of 
  Whatcom and Skagit Counties and Seattle and Vicinity.

* WHEN...Until 7 PM PDT Saturday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

* ADDITIONAL DETAILS...Nighttime relief on Friday and Saturday 
  morning will be poor across Eastern Puget Sound, the adjacent 
  Cascade foothills, and the Seattle metro areas away from the 
  water. Overnight temperatures will remain in the 70s, and only 
  briefly drop into the mid to upper 60s late overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-140300-
/O.CON.KSEW.HT.Y.0002.000000T0000Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
750 PM PDT Thu Aug 12 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Hot temperatures rising into the low to mid 90s Friday.

* WHERE...Olympics.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Hot temperatures may cause heat illnesses to occur.

* ADDITIONAL DETAILS...Overnight relief will be poor with low
  temperatures in the low-mid 60s in the early morning hours of  
  Friday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
635 
WWUS76 KSEW 132227
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
327 PM PDT Fri Aug 13 2021

WAZ503-506-507-511-512-559-140300-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
327 PM PDT Fri Aug 13 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...

* WHAT...Dangerously hot conditions with temperatures in the mid
  90s to upper 90s. Highs still near 90 Saturday. Hottest 
  temperatures over the Southwest Interior, Cascade foothills, and
  Cascade Valleys.

* WHERE...Lower Chehalis Valley Area, Western Whatcom County, 
  Hood Canal Area, Everett and Vicinity, Western Skagit County 
  and Bremerton and Vicinity.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ504-509-555-556-558-567>569-141000-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
327 PM PDT Fri Aug 13 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT
SATURDAY...

* WHAT...Dangerously hot conditions with daytime temperatures in
  the mid to upper 90s Friday. Overnight lows will remain in the
  mid to upper 60s. Highs on Saturday will remain in the lower 90s.
  Hottest temperatures over the Southwest Interior, Cascade 
  foothills, and Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Southwest Interior, Cascades of 
  Whatcom and Skagit Counties and Seattle and Vicinity.

* WHEN...Until 7 PM PDT Saturday.

* IMPACTS...Extreme heat and humidity will significantly 
  increase the potential for heat related illnesses, 
  particularly for those working or participating in outdoor 
  activities.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$

WAZ513-140300-
/O.CON.KSEW.HT.Y.0002.000000T0000Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
327 PM PDT Fri Aug 13 2021

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING...

* WHAT...Hot temperatures in the low to mid 90s Friday.

* WHERE...Olympics.

* WHEN...Until 8 PM PDT Friday.

* IMPACTS...Hot temperatures and high humidity may cause heat 
  illnesses to occur.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
140 
WWUS76 KSEW 140238
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
738 PM PDT Fri Aug 13 2021

WAZ503-506-507-511-512-559-140345-
/O.EXP.KSEW.EH.W.0002.000000T0000Z-210814T0300Z/
Western Whatcom County-Western Skagit County-Everett and Vicinity-
Hood Canal Area-Lower Chehalis Valley Area-Bremerton and Vicinity-
Including the cities of Bellingham, Mount Vernon, Anacortes, 
Sedro-Woolley, Burlington, Everett, Edmonds, Lynnwood, 
Marysville, Shelton, Montesano, Elma, McCleary, Bremerton, 
and Silverdale
738 PM PDT Fri Aug 13 2021

...EXCESSIVE HEAT WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING...

With more steady onshore flow, temperatures are expected to
gradually cool. However, temperatures will remain warm throughout
the day Saturday. 

$$

WAZ513-140345-
/O.EXP.KSEW.HT.Y.0002.000000T0000Z-210814T0300Z/
Olympics-
Including the cities of Amanda Park, Grisdale, Hurricane Ridge, 
Montesano, Mount Olympus, and Quinault
738 PM PDT Fri Aug 13 2021

...HEAT ADVISORY WILL EXPIRE AT 8 PM PDT THIS EVENING...

With more steady onshore flow, temperatures are expected to
gradually cool.

$$

WAZ504-509-555-556-558-567>569-141045-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
738 PM PDT Fri Aug 13 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT
SATURDAY...

* WHAT...Dangerously hot conditions with daytime temperatures in
  the mid to upper 90s Friday. Overnight lows will remain in the
  mid to upper 60s. Highs on Saturday will remain in the lower 90s.
  Hottest temperatures over the Southwest Interior, Cascade 
  foothills, and Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Southwest Interior, Cascades of 
  Whatcom and Skagit Counties and Seattle and Vicinity.

* WHEN...Until 7 PM PDT Saturday.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
835 
WWUS76 KSEW 140955
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
255 AM PDT Sat Aug 14 2021

WAZ504-509-555-556-558-567>569-150200-
/O.CON.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
255 AM PDT Sat Aug 14 2021

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS
EVENING...

* WHAT...Dangerously hot conditions with morning temperatures
  lingering in the mid to upper 60s. While highs for today will be
  a little cooler, most locations within the warning area will
  remain in the upper 80s to lower 90s. Hottest temperatures over
  the Southwest Interior, Cascade foothills, and Cascade Valleys.

* WHERE...Tacoma Area, Bellevue and Vicinity, East Puget Sound 
  Lowlands, Cascades of Pierce and Lewis Counties, Cascades of 
  Snohomish and King Counties, Cascades of Whatcom and Skagit 
  Counties, Southwest Interior and Seattle and Vicinity.

* WHEN...Until 7 PM PDT this evening.

* IMPACTS...Extreme heat will significantly increase the 
  potential for heat related illnesses, particularly for those 
  working or participating in outdoor activities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out
of the sun, and check up on relatives and neighbors. Young
children and pets should never be left unattended in vehicles
under any circumstances.

Take extra precautions if you work or spend time outside. When
possible reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear lightweight and loose fitting clothing when
possible. To reduce risk during outdoor work, the Occupational
Safety and Health Administration recommends scheduling frequent
rest breaks in shaded or air conditioned environments. Anyone
overcome by heat should be moved to a cool and shaded location.
Heat stroke is an emergency! Call 9 1 1.

&&

$$
499 
WWUS76 KSEW 141856
NPWSEW

URGENT - WEATHER MESSAGE
National Weather Service Seattle WA
1156 AM PDT Sat Aug 14 2021

WAZ504-509-555-556-558-567>569-142000-
/O.CAN.KSEW.EH.W.0002.000000T0000Z-210815T0200Z/
Southwest Interior-Tacoma Area-East Puget Sound Lowlands-
Bellevue and Vicinity-Seattle and Vicinity-
Cascades of Whatcom and Skagit Counties-
Cascades of Snohomish and King Counties-
Cascades of Pierce and Lewis Counties-
Including the cities of Olympia, Lacey, Tumwater, Tacoma, 
Covington-Sawyer-w, Maple Valley, Monroe, Prairie Ridge, 
Enumclaw, Bonney Lake, Woodinville, Redmond, Kirkland, Bothell, 
Kenmore, Newport Hills, Sahalee, Pine Lake, Seattle, Concrete, 
Lyman, Hamilton, Darrington, and Morton
1156 AM PDT Sat Aug 14 2021

...EXCESSIVE HEAT WARNING IS CANCELLED...

Cooler onshore flow will keep temperatures mostly in the 80s today
and thus reduce the overall heat risk across the region. 

$$

What forecasters said that day

The local office's own words before this excessive heat warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Seattle, WA wrote its last area forecast discussion before this excessive heat warning went out at Aug 10, 2:27 PM PDT, 17 minutes earlier.

Area forecast discussion, Aug 10, 2:27 PM PDT, 17 minutes before
Area Forecast Discussion
National Weather Service Seattle WA
227 PM PDT Tue Aug 10 2021

.SYNOPSIS...
Upper level ridge of high pressure will build into Western
Washington through the middle and latter portions of the week.
This will send temperatures well above normal again for several
days as a heat wave develops across the area. The ridge of high
pressure will weaken and slide east by late this week which will
allow for onshore flow to develop Thursday and Friday along the
coast and bring relief there. Hot weather will hold on the east
side of the Puget Sound through Saturday. A trough of low pressure
will push into the region by late Saturday and Sunday and bring
much cooler weather with temperatures dropping back to near
normal. There will be increasing rain chances and cooler
temperatures Monday with the trough of low pressure.

&&

.SHORT TERM /TONIGHT THROUGH FRIDAY/...
Skies have become mainly clear across Western Washington, except
for some cirrus across the interior and a bit of stubborn coastal
stratus. Temperatures have warmed into the low 70s on the coast
and upper 70s to low 80s inland. While skies remain clear
overnight, heights are rising and a warmer night is expected
tonight. Lows will dip to low 60s in the urban areas and warmer
spots, with 50s in the outlying areas.

Heights continue to rise on Wednesday as the 500mb ridge of high
pressure over the eastern Pacific builds east. By late Wednesday,
heights of around 594dm will be common. 850mb temps will increase
to over 20C across the region as well, combining to spell a much
warmer day on Wednesday. Highs will top out in the mid 80s to low
90s in the interior lowlands and upper 70s to low 80s on the
coast. Overnight lows will experience only minor cooling with most
areas staying in the 60s overnight and even mid 60s in urban
areas.

Thursday the heat will increase with 850 temps of +21 to +23C in
the area. This will likely also be the warmest of the days along
the coast as the wind will start offshore but looks to turn
onshore late in the day. This is the biggest change, to cool high
temps across portions of the Olympic Peninsula and expecting highs
in the mid 80s to near 90 there. Otherwise it will remain on track
elsewhere with highs in the 90s interior areas and upper 90s
showing up south of Seattle, and very hot again in the Cascade
Valleys. This will lead to a very warm night for the lowlands and
urban areas Thursday night. Briefly dipping into the upper 60s for
urban centers and very little relief anywhere except the immediate
Pacific Coast.

Friday the 850mb temps will remain very warm. Some more westerly
component will keep Pacific Coastal areas cooler but interior
areas will be very hot again, with widespread low to mid 90s and
many upper 90s appearing in the Cascade Valleys and from Seattle
south. This will give way to another very warm night especially in
the urban areas and from the Sound to the east, but cooler on the
coast.

Existing heat watch has been upgraded to a heat warning in all
areas except for the Olympic mountains and north coast. With
guidance suggesting a blunting of the heat wave on the north
coast, an advisory for those zones looked more appropriate at this
time. However heat risk values suggest excessive heat warning
warranted for other zones further east through Friday. Important
note - this heat wave is not as hot as the late June one. However,
this doesn't mean we can let our guard down as temperatures in the
90s to near 100 are still significant for our area and potentially
record setting. Impacts will be greatest on our most vulnerable
populations.

Smoke questions - at this time the regional satellite does not
show a significant amount of smoke nearby. As winds shift we will
see some elevated smoke pushing into the area by later this week,
however not expecting increasing smoke at low levels to bring
reduced air quality concerns. Johnson

.LONG TERM /SATURDAY THROUGH TUESDAY/...
By Saturday the ridge will have shifted east as a trough of low
pressure begins to push in off the Pacific. Heights will be much
lower Saturday. However there will be a lingering pool of very
warm 850 mb temps still east of the Sound and so one last
lingering hot day is expected. Temps on the Pacific coast will be
comfortable in the 70s but it will remain in the low to mid 90s in
the lowlands and valleys east of Puget Sound. The Excessive Heat
Warning will continue Saturday east of the Sound where the hottest
temperatures are expected to remain.

The next question is chance of convection as the flow turns more
southerly on Saturday. Looking at the potential over the
Cascades, it is noted that there will be very steep lapse rates,
however a very dry atmosphere. At this time will not carry mention
of thunderstorms in the area but this needs to continue to be
monitored given the pattern recognition in this type of transition
with an approaching trough offshore.

Sunday will see much cooler weather with the approaching trough of
low pressure and lower heights. Clouds will increase and there
will be a chance of showers for the coast and north. This trough
will look to linger into early next week. Some rain chances will
persist along with temperatures near or below normal in spots.
Highs will be more in the 70s early next week with mid 60s along
coastal areas.

Johnson

&&

.AVIATION...Northerly flow aloft and at the surface will continue
into Wednesday. KHQM and KOLM could see a slight wind shift to
become more westerly with a very weak marine layer moving inland.
In general skies are expected to remain in VFR with mostly clear
skies throughout the region. Terminals near the waters will likely
see some breezier conditions through the rest of this afternoon
and again tomorrow afternoon. These terminals could see gusts
around 15 knots. Sustained winds throughout W WA are expected to
be 7-10 knots during the daytime hours and easing slightly during
the overnight.

KSEA...VFR conditions will remain in place with some thin cirrus
passing overhead. Northerly winds 7-10 knots through the remainder
of the day, easing to 5-7 during the overnight before picking back
up Wednesday morning.

&&

.MARINE...Northerly winds over the outer coastal waters as well as
through the Northern Inland waters are expected to reach small
craft advisory level starting tonight and continuing through
Wednesday morning. Due to winds and the northwesterly swell, we
are expecting seas to increase Wednesday to 5-8 feet. Highest seas
are expected to be in the outer coastal waters.
A shift to easterly flow is expected to occur starting on Thursday
due to a thermal trough develops offshore. Seas are also expected
to rise to 8-10 feet during this later part of the week.
Butwin
&&

.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Excessive Heat Warning from noon Wednesday to 7 PM PDT Saturday
     for Bellevue and Vicinity-Cascades of Pierce and Lewis
     Counties-Cascades of Snohomish and King Counties-Cascades
     of Whatcom and Skagit Counties-East Puget Sound Lowlands-
     Seattle and Vicinity-Southwest Interior-Tacoma Area.

     Heat Advisory from noon Wednesday to 8 PM PDT Friday for
     Olympics.

     Excessive Heat Warning from noon Wednesday to 8 PM PDT Friday
     for Bremerton and Vicinity-Everett and Vicinity-Hood Canal
     Area-Lower Chehalis Valley Area-Western Skagit County-
     Western Whatcom County.

     Heat Advisory from noon Wednesday to 8 PM PDT Thursday for North
     Coast.

PZ...Small Craft Advisory from 8 PM this evening to 8 AM PDT
     Wednesday for Coastal Waters From Cape Flattery To James
     Island 10 To 60 Nm-Coastal Waters From James Island To
     Point Grenville 10 To 60 Nm-Coastal Waters From Point
     Grenville To Cape Shoalwater 10 To 60 Nm.

     Small Craft Advisory from 11 PM this evening to 8 AM PDT
     Wednesday for Northern Inland Waters Including The San Juan
     Islands.

&&

www.weather.gov/seattle

The office that day

Everything else NWS Seattle, WA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 10, 2:22 PM PDTSmall Craft AdvisorySEW45 hr
Aug 10, 2:44 PM PDTHeat AdvisorySEW3 days

Nearby

Excessive Heat Warnings in Washington, 2021Every excessive heat warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.