Alert archive / Washington / High Wind Warnings in 2024
High Wind Warning 10, NWS Seattle, WA
NWS Seattle, WA issued this high wind warning at Dec 25, 2024, 3:02 AM PST for San Juan County, Washington. It took effect at Dec 25, 2024, 10:00 PM PST. It was in force for 15 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
- Dec 25, 2024, 3:02 AM PST (11:02 UTC)
- In effect from
- Dec 25, 2024, 10:00 PM PST
- Expired
- Dec 26, 2024, 1:00 PM PST
- In force
- 15 hr
- Issued by
- NWS Seattle, WA
County San Juan County, WA
The radar
The Seattle radar (KATX), 54 km from the middle of the area, began a volume at 11:08 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Quillayute State, WA (KUIL), launched 00:00Z, 11.0 hours before the alert went out and 127 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 53 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 714 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
708 WWUS76 KSEW 251102 NPWSEW URGENT - WEATHER MESSAGE National Weather Service Seattle WA 302 AM PST Wed Dec 25 2024 WAZ516-260000- /O.UPG.KSEW.HW.A.0002.241226T0600Z-241226T2100Z/ /O.NEW.KSEW.HW.W.0010.241226T0600Z-241226T2100Z/ /O.CON.KSEW.WI.Y.0026.241225T1200Z-241226T0000Z/ North Coast- Including the cities of Clearwater, Neah Bay, Forks, Beaver, Queets, Ozette, and La Push 302 AM PST Wed Dec 25 2024 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 1 PM PST THURSDAY... * WHAT...For the Wind Advisory, southeast winds 20 to 35 mph with gusts up to 50 mph expected. For the High Wind Warning, south winds 30 to 40 mph with gusts up to 60 mph late tonight becoming west Thursday morning. * WHERE...North Coast. * WHEN...For the Wind Advisory, until 4 PM PST this afternoon. For the High Wind Warning, from 10 PM this evening to 1 PM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ517-260000- /O.UPG.KSEW.HW.A.0002.241226T0600Z-241226T2100Z/ /O.NEW.KSEW.HW.W.0010.241226T0600Z-241226T2100Z/ Central Coast- Including the cities of Aberdeen and Hoquiam 302 AM PST Wed Dec 25 2024 ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 1 PM PST THURSDAY... * WHAT...South winds 25 to 40 mph with gusts up to 60 mph late tonight. Winds becoming west 25 to 40 mph with gusts 50 to 60 mph Thursday morning. * WHERE...Central Coast. * WHEN...From 10 PM this evening to 1 PM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ001-503-506-510-260000- /O.CON.KSEW.WI.Y.0026.241225T1500Z-241226T0600Z/ /O.CON.KSEW.HW.A.0002.241226T0600Z-241226T2100Z/ San Juan County-Western Whatcom County-Western Skagit County- Admiralty Inlet Area- Including the cities of Port Townsend, Bellingham, Friday Harbor, Anacortes, Mount Vernon, Sedro-Woolley, and Burlington 302 AM PST Wed Dec 25 2024 ...WIND ADVISORY REMAINS IN EFFECT FROM 7 AM THIS MORNING TO 10 PM PST THIS EVENING... ...HIGH WIND WATCH REMAINS IN EFFECT FROM THIS EVENING THROUGH THURSDAY AFTERNOON... * WHAT...For the Wind Advisory, southeast winds 20 to 30 mph with gusts up to 50 mph expected. For the High Wind Watch, southeast winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Admiralty Inlet Area, San Juan County, Western Skagit County, and Western Whatcom County. * WHEN...For the Wind Advisory, from 7 AM this morning to 10 PM PST this evening. For the High Wind Watch, from this evening through Thursday afternoon. * IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Monitor the latest forecasts and warnings for updates. && $$ 44
4 follow-up statements
939 WWUS76 KSEW 252129 NPWSEW URGENT - WEATHER MESSAGE National Weather Service Seattle WA 129 PM PST Wed Dec 25 2024 WAZ001-503-506-510-261200- /O.UPG.KSEW.HW.A.0002.241226T0600Z-241226T2100Z/ /O.EXA.KSEW.HW.W.0010.241226T0600Z-241226T2100Z/ /O.CON.KSEW.WI.Y.0026.000000T0000Z-241226T0600Z/ San Juan County-Western Whatcom County-Western Skagit County- Admiralty Inlet Area- Including the cities of Mount Vernon, Anacortes, Bellingham, Friday Harbor, Burlington, Port Townsend, and Sedro-Woolley 129 PM PST Wed Dec 25 2024 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... ...HIGH WIND WARNING IN EFFECT FROM 10 PM THIS EVENING TO 1 PM PST THURSDAY... * WHAT...For the Wind Advisory, southeast winds 15 to 30 mph with gusts up to 55 mph. For the High Wind Warning, southeast winds 20 to 30 mph with gusts up to 60 mph tonight, becoming southwest Thursday morning. * WHERE...Admiralty Inlet Area, San Juan County, Western Skagit County, and Western Whatcom County. * WHEN...For the Wind Advisory, until 10 PM PST this evening. For the High Wind Warning, from 10 PM this evening to 1 PM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...The strongest winds through this evening will be across the San Juan Islands and Admiralty Inlet. There may be a brief lull in winds early tonight before south winds increase early Thursday morning. A period of stronger southwest winds may occur Thursday morning, particularly over San Juan Islands and Admiralty Inlet. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ516-261200- /O.CON.KSEW.HW.W.0010.241226T0600Z-241226T2100Z/ /O.CON.KSEW.WI.Y.0026.000000T0000Z-241226T0000Z/ North Coast- Including the cities of Ozette, La Push, Beaver, Queets, Clearwater, Neah Bay, and Forks 129 PM PST Wed Dec 25 2024 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... ...HIGH WIND WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM PST THURSDAY... * WHAT...For the Wind Advisory, southeast winds 15 to 30 mph with gusts up to 50 mph. For the High Wind Warning, southwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...North Coast. * WHEN...For the Wind Advisory, until 4 PM PST this afternoon. For the High Wind Warning, from 10 PM this evening to 1 PM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ517-261200- /O.CON.KSEW.HW.W.0010.241226T0600Z-241226T2100Z/ Central Coast- Including the cities of Hoquiam and Aberdeen 129 PM PST Wed Dec 25 2024 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 10 PM THIS EVENING TO 1 PM PST THURSDAY... * WHAT...Southwest winds 25 to 35 mph with gusts up to 60 mph expected. * WHERE...Central Coast. * WHEN...From 10 PM this evening to 1 PM PST Thursday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ504-507-509-511-512-555-556-558-559-261200- /O.NEW.KSEW.WI.Y.0027.241226T0700Z-241226T1800Z/ Southwest Interior-Everett and Vicinity-Tacoma Area-Hood Canal Area-Lower Chehalis Valley Area-East Puget Sound Lowlands- Bellevue and Vicinity-Seattle and Vicinity-Bremerton and Vicinity- Including the cities of Montesano, Redmond, Tumwater, Everett, Maple Valley, Bonney Lake, Silverdale, Kirkland, Elma, Kenmore, Bremerton, Olympia, Covington-Sawyer-w, Newport Hills, Lynnwood, Woodinville, Pine Lake, Lacey, Enumclaw, Marysville, Edmonds, Tacoma, Prairie Ridge, Bothell, McCleary, Monroe, Seattle, Sahalee, and Shelton 129 PM PST Wed Dec 25 2024 ...WIND ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PST THURSDAY... * WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph expected. * WHERE...Hood Canal Area, Bellevue and Vicinity, Bremerton and Vicinity, East Puget Sound Lowlands, Everett and Vicinity, Lower Chehalis Valley Area, Seattle and Vicinity, Southwest Interior, and Tacoma Area. * WHEN...From 11 PM this evening to 10 AM PST Thursday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...A brief period of gusty southwest winds are expected Thursday morning. There will likely be a range of peak wind gusts between 30 to 50 MPH. Localized gusts up to 55 MPH are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicles. Secure outdoor objects. && $$ JD
505 WWUS76 KSEW 261150 NPWSEW URGENT - WEATHER MESSAGE National Weather Service Seattle WA 350 AM PST Thu Dec 26 2024 WAZ001-503-506-510-262100- /O.CON.KSEW.HW.W.0010.000000T0000Z-241226T2100Z/ San Juan County-Western Whatcom County-Western Skagit County- Admiralty Inlet Area- Including the cities of Friday Harbor, Port Townsend, Anacortes, Sedro-Woolley, Mount Vernon, Burlington, and Bellingham 350 AM PST Thu Dec 26 2024 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... * WHAT...South winds 25 to 35 mph with gusts up to 60 mph. * WHERE...Admiralty Inlet Area, San Juan County, Western Skagit County, and Western Whatcom County. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ516-517-262100- /O.CON.KSEW.HW.W.0010.000000T0000Z-241226T2100Z/ North Coast-Central Coast- Including the cities of Ozette, Clearwater, Hoquiam, Queets, La Push, Neah Bay, Aberdeen, Forks, and Beaver 350 AM PST Thu Dec 26 2024 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... * WHAT...West winds 25 to 40 mph with gusts up to 60 mph. * WHERE...Central Coast and North Coast. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ504-507-509-511-512-555-556-558-559-262100- /O.EXT.KSEW.WI.Y.0027.000000T0000Z-241226T2100Z/ Southwest Interior-Everett and Vicinity-Tacoma Area-Hood Canal Area-Lower Chehalis Valley Area-East Puget Sound Lowlands- Bellevue and Vicinity-Seattle and Vicinity-Bremerton and Vicinity- Including the cities of Kenmore, Bonney Lake, Bothell, Shelton, Seattle, Silverdale, Lacey, Enumclaw, Sahalee, Pine Lake, Maple Valley, Elma, Olympia, Everett, Lynnwood, Tumwater, Kirkland, Prairie Ridge, Woodinville, Bremerton, Marysville, Monroe, Redmond, Tacoma, McCleary, Newport Hills, Covington-Sawyer-w, Edmonds, and Montesano 350 AM PST Thu Dec 26 2024 ...WIND ADVISORY NOW IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... * WHAT...Southwest winds 20 to 30 mph with gusts up to 55 mph. * WHERE...Hood Canal Area, Bellevue and Vicinity, Bremerton and Vicinity, East Puget Sound Lowlands, Everett and Vicinity, Lower Chehalis Valley Area, Seattle and Vicinity, Southwest Interior, and Tacoma Area. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...The quick increase in the wind speeds as well as a rapid change in direction could increase the chances for downed trees and power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicles. Secure outdoor objects. && $$ 44
836 WWUS76 KSEW 261551 NPWSEW URGENT - WEATHER MESSAGE National Weather Service Seattle WA 751 AM PST Thu Dec 26 2024 WAZ001-506-262100- /O.CAN.KSEW.HW.W.0010.000000T0000Z-241226T2100Z/ /O.EXA.KSEW.WI.Y.0027.000000T0000Z-241226T2100Z/ San Juan County-Western Skagit County- Including the cities of Burlington, Mount Vernon, Friday Harbor, Anacortes, and Sedro-Woolley 751 AM PST Thu Dec 26 2024 ...WIND ADVISORY HAS REPLACED THE HIGH WIND WARNING AND IS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... * WHAT...Southwest winds 15 to 25 mph with gusts up to 45 mph. * WHERE...San Juan County and Western Skagit County. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Winds will transition westerly mid-morning, with localized gusts up to 45 MPH, especially for areas adjacent to the Strait of Juan de Fuca. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicles. Secure outdoor objects. && $$ WAZ503-516-261700- /O.CAN.KSEW.HW.W.0010.000000T0000Z-241226T2100Z/ Western Whatcom County-North Coast- Including the cities of Bellingham, Queets, Ozette, La Push, Forks, Beaver, Clearwater, and Neah Bay 751 AM PST Thu Dec 26 2024 ...HIGH WIND WARNING IS CANCELLED... Winds are expected to remain below threshold. Localized southwest wind gusts of 25 to 40 MPH are possible through this morning. $$ WAZ517-261900- /O.EXT.KSEW.HW.W.0010.000000T0000Z-241226T1900Z/ Central Coast- Including the cities of Hoquiam and Aberdeen 751 AM PST Thu Dec 26 2024 ...HIGH WIND WARNING NOW IN EFFECT UNTIL 11 AM PST THIS MORNING... * WHAT...West winds 20 to 30 mph with gusts up to 50 mph. Localized gusts up to 55 MPH. * WHERE...Central Coast. * WHEN...Until 11 AM PST this morning. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...West winds will slowly taper off later this morning into the afternoon. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ510-262100- /O.CON.KSEW.HW.W.0010.000000T0000Z-241226T2100Z/ Admiralty Inlet Area- Including the cities of Port Townsend 751 AM PST Thu Dec 26 2024 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... * WHAT...Southeast winds 15 to 25 mph with gusts up to 45 mph will transition to west winds this morning with localized gusts up to 60 MPH. * WHERE...Admiralty Inlet Area. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... People should avoid being outside in forested areas and around trees and branches. If possible, remain in the lower levels of your home during the windstorm, and avoid windows. Use caution if you must drive. && $$ WAZ504-507-509-511-512-555-556-558-559-262100- /O.CON.KSEW.WI.Y.0027.000000T0000Z-241226T2100Z/ Southwest Interior-Everett and Vicinity-Tacoma Area-Hood Canal Area-Lower Chehalis Valley Area-East Puget Sound Lowlands- Bellevue and Vicinity-Seattle and Vicinity-Bremerton and Vicinity- Including the cities of Everett, Olympia, Bremerton, Marysville, Elma, Seattle, Kirkland, Woodinville, Edmonds, Tacoma, Kenmore, Montesano, Maple Valley, Enumclaw, Newport Hills, Lacey, Pine Lake, Tumwater, Redmond, Bonney Lake, Monroe, Silverdale, Shelton, Sahalee, McCleary, Prairie Ridge, Covington-Sawyer-w, Bothell, and Lynnwood 751 AM PST Thu Dec 26 2024 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST THIS AFTERNOON... * WHAT...Southwest winds 15 to 25 mph with gusts up to 50 mph. * WHERE...Hood Canal Area, Bellevue and Vicinity, Bremerton and Vicinity, East Puget Sound Lowlands, Everett and Vicinity, Lower Chehalis Valley Area, Seattle and Vicinity, Southwest Interior, and Tacoma Area. * WHEN...Until 1 PM PST this afternoon. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. * ADDITIONAL DETAILS...Winds will be strongest from Seattle southward through this morning. There will be a range of peak wind gusts from 30 to 50 MPH. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicles. Secure outdoor objects. && $$ JD
198 WWUS76 KSEW 262039 NPWSEW URGENT - WEATHER MESSAGE National Weather Service Seattle WA 1239 PM PST Thu Dec 26 2024 WAZ510-262145- /O.EXP.KSEW.HW.W.0010.000000T0000Z-241226T2100Z/ Admiralty Inlet Area- Including the cities of Port Townsend 1239 PM PST Thu Dec 26 2024 ...HIGH WIND WARNING WILL EXPIRE AT 1 PM PST THIS AFTERNOON... The threat for strong winds has ended. Localized wind gusts of 20 to 35 MPH may continue at times this afternoon. $$ WAZ001-504-506-507-509-511-512-555-556-558-559-262145- /O.EXP.KSEW.WI.Y.0027.000000T0000Z-241226T2100Z/ San Juan County-Southwest Interior-Western Skagit County-Everett and Vicinity-Tacoma Area-Hood Canal Area-Lower Chehalis Valley Area-East Puget Sound Lowlands-Bellevue and Vicinity-Seattle and Vicinity-Bremerton and Vicinity- Including the cities of Everett, Olympia, Bremerton, Marysville, Elma, Seattle, Kirkland, Woodinville, Edmonds, Tacoma, Kenmore, Burlington, Montesano, Maple Valley, Enumclaw, Newport Hills, Lacey, Pine Lake, Friday Harbor, Tumwater, Redmond, Bonney Lake, Monroe, Silverdale, Shelton, Mount Vernon, Sahalee, McCleary, Prairie Ridge, Covington-Sawyer-w, Anacortes, Bothell, Lynnwood, and Sedro-Woolley 1239 PM PST Thu Dec 26 2024 ...WIND ADVISORY WILL EXPIRE AT 1 PM PST THIS AFTERNOON... The threat has ended. Localized wind gusts of 20 to 35 MPH may continue at times this afternoon. $$ JD
What forecasters said that day
The local office's own words before this high wind 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 high wind warning went out at Dec 24, 8:54 PM PST, 6 hours 8 minutes earlier.
Area forecast discussion, Dec 24, 8:54 PM PST, 6 hours 8 minutes before
Area Forecast Discussion
National Weather Service Seattle WA
854 PM PST Tue Dec 24 2024
.SYNOPSIS...Expect increasing winds, heavier rainfall, and
mountain snow starting early Wednesday as a strong front and
associated atmospheric river moves across the region. There is
some potential for a deepening low to bring stronger winds early
Thursday, but confidence is low. The active pattern will continue
with another set of disturbances late this week and through the
weekend. A brief break appears likely early next week with weak
high pressure building over the region.
&&
.SHORT TERM /TONIGHT THROUGH FRIDAY/...Forecast remains on track
tonight with just a few areas of showers and the region largely in
between weather systems. The active pattern will return by early
Christmas Day, however. Previous discussion follows. 12
Ensembles are painting a very potent 180+ kt jet streak cutting
across the Pacific. Near the exit region, a developing frontal
system will usher in an atmospheric river along with gusty winds
and high seas. Let's take a dive into all the expected impacts
below:
Precipitation: A broad swath of PWAT values around 1.00 to 1.25"
offshore will spill into the region on Wednesday morning, well
above the climatological norm for this time of year. Along with
it, 250 to 500 IVT values are pressing up against the Olympics and
the rest of W WA, signifying deep-moisture transport along with
the potential for efficient orographic lifting of precipitation.
This rain-maker is slated to remain in place as the deluge persist
well into the overnight hours. Snow levels will start off around
2,500 ft before gradually rising to 3,500 to 4,500 ft. Heavy
snowfall is expected for both the Olympics and Cascades as a
Winter Storm Warning is in effect from Wednesday morning through
Thursday evening. In terms of rainfall, 1.00-2.00" of rain is
expected across the interior lowlands during this time. 2.00-4.00"
is at play for the coast along with 4.00-6.00" over the Olympics.
As more HREF guidance fills in, these number may be refined.
Nevertheless, a very wet system will take hold with the potential
for isolated river flooding. More below is provided within the
hydro section.
Winds: As the frontal system develops, a notable drop in central
pressure is being shown by models as it curls north of Haida
Gwaii. In response, a tightened surface gradient with increasing
southeasterly surface winds across the area has prompted a Wind
Advisory for the North Coast, Admiralty Inlet, Northern Interior
and San Juan Islands. Gusts up 50 mph are expected in these areas
between during the morning hours into the afternoon. The threat
won't end there as the potential for even stronger winds exists
Thursday morning. Much uncertainty remains in the exact evolution
of this particular system but models are hinting at bent back
occlusion which could lead to the potential for damaging winds
along the coast.
High Surf: Big time seas will result from this active pattern of
storms tracking over the Pacific. Seas are forecast to build above
20 feet Wednesday night into Thursday. As such, an additional
High Surf Advisory has been issued. Large waves may wash over
beaches, jetties, and other structures unexpectedly bringing much
danger to people and infrastructures.
The parade of storms will last through Friday with additional
headlines likely needed. Widespread precipitation, gusty winds,
along with coastal flooding as tides start to increase as we move
into the next cycle of perigean spring tides. Stay tuned for more
updates as we get through this active period of weather one day
at a time. High temperatures are to range between the mid 40s to
near 50 F with overnight lows in the upper 30s to lower 40s.
.LONG TERM /SATURDAY THROUGH TUESDAY/....While there are some
differences in the models, the main message in the extended
forecast is conditions are likely to remain unsettled.None of
these systems look anywhere near as strong as the bunch Wednesday
into Thursday. Long range ensembles are hinting at ridging towards
the beginning of next week but we aren't favored to completely dry
out just yet.
McMillian
&&
.AVIATION...Westerly flow aloft will transition more southwesterly
on Wednesday as an upper trough develops offshore. A few scattered
showers ahead of the next disturbance will linger this evening and
could bring brief temporary lower conditions. Otherwise, expect
increasing clouds overnight with lowering ceilings as the front
approaches. Widespread MVFR ceilings expected by Wednesday
morning with local IFR conditions and reduced visibility in rain,
especially along the coast. Widespread low MVFR/IFR conditions
likely expected Wednesday night. South winds will increase early
Wednesday morning and remain gusty through the day. Strongest
winds will be along the coast and near the water in the interior
from KPAE north through KFHR/KORS and KBLI through afternoon.
KSEA...VFR conditions this evening with some mid clouds around
associated with light showers. Meanwhile, gusty southerly winds to
around 20 kt will ease a bit this evening. However, increasing
clouds and lowering ceilings by early Wednesday as the next front
approaches. Expect southeast winds gusting to 25 kt through much
of Wednesday, along with lower MVFR ceilings and reduced
visibilityin rain.
&&
.MARINE...Winds will increase later tonight into Wednesday morning
as the next frontal system moves across Western Washington. High-
end gales are expected for the coastal waters, as well as portions
of the Strait of Juan de Fuca and northern inland water, on
Wednesday. Confidence is increasing in the potential for a brief
burst of storm gusts to 60 kt with the frontal passage around
midday over the outer coastal waters and will continue to monitor
the high resolution guidance and available observations well
offshore to determine if a higher headline (that is, a storm
warning) is needed for portions of the coastal waters.
Another system will quickly follow later Wednesday night into
Thursday morning as some guidance suggests a deepening low will
cross the northern coastal waters and toward the west entrance of
the Strait of Juan de Fuca. While there does remain some
uncertainty as to if it develops fully, how strong it will be, and
where it might track, the potential for another round of
very strong winds (at least gales, with high end potential of 60
kt gusts in a bent-back occlusion around the low) needs to be
emphasized.
A weather system will then again follow Friday into
Saturday for another period of stronger winds. Seas remain
elevated and slow to decay this evening, holding around 15 to 18
feet still tonight. A continued gradual decline will materialize
into early Wednesday, but seas will again build into the 20-25 ft
range over the coastal waters by Thursday. JD/Cullen
&&
.HYDROLOGY...A series of systems remain on track to impact Western
Washington from Wednesday into this weekend. A majority of the
rainfall will fall Wednesday into Friday morning with an atmospheric
river. Rainfall amounts of 2 to 4 inches are expected near the
coast and locally higher amounts of 4 to 6 inches over the
Olympics.
The Skokomish River is expected to remain in above minor flood
stage, with an increase up to moderate flood stage Thursday
afternoon before slowly falling back to minor through the weekend.
The Bogachiel is also forecasted to rise into minor flood stage
Thursday afternoon (flood watch now in effect for Clallam County).
The Chehalis River and Grand Mound and Porter, Cedar River at
Renton, and the Skookumchuck River at Bucoda will climb into action
stage, but are expected to remain below minor flood stage at this
time.
Additional rivers and streams may rise into action stage, but
are currently below it at this time with this event. Additional
rivers that will approach action flood stage include: Snoqualmie
River at Carnation, Satsop River at Satsop, Snohomish River at
Monroe, Newaukum River at Chehalis.
Additional systems will bring lesser amounts of precipitation into
the region Friday into the weekend. These systems are not expected
to produce significant rises to rivers, but may maintain any rises
that do occur through the weekend until conditions improve next
week. Also, with snow levels increasing from 3,000 feet up to 4,000
to 5,000 feet with this atmospheric river, the cooler temperatures
will reduce the flood threat for rivers flowing off the Cascades.
There remains an increased threat of landslides through the weekend
(due to saturated soil conditions in combination with the expected
precipitation expected to fall).
HPR
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Wind Advisory from 7 AM to 10 PM PST Wednesday for Admiralty
Inlet Area-San Juan County-Western Skagit County-Western
Whatcom County.
High Wind Watch from Wednesday evening through Thursday
afternoon for Admiralty Inlet Area-Central Coast-North
Coast-San Juan County-Western Skagit County-Western Whatcom
County.
Winter Storm Warning from 7 AM Wednesday to 4 PM PST Thursday
for Olympics.
Flood Watch from Wednesday afternoon through Friday afternoon
for Eastern Strait of Juan de Fuca-North Coast-Olympics-
Western Strait of Juan De Fuca.
Wind Advisory from 4 AM to 4 PM PST Wednesday for North Coast.
High Surf Advisory from 10 PM Wednesday to 10 PM PST Thursday
for Central Coast-North Coast.
Winter Storm Warning from 10 AM Wednesday to 10 PM PST Thursday
for West Slopes North Cascades and Passes-West Slopes North
Central Cascades and Passes-West Slopes South Central
Cascades and Passes.
PZ...Small Craft Advisory until 10 PM PST Wednesday for Grays Harbor
Bar.
Small Craft Advisory until 4 AM PST Wednesday for Coastal Waters
From Cape Flattery To James Island 10 To 60 Nm-Coastal
Waters From Cape Flattery To James Island Out 10 Nm-Coastal
Waters From James Island To Point Grenville 10 To 60 Nm-
Coastal Waters From James Island To Point Grenville Out 10
Nm-Coastal Waters From Point Grenville To Cape Shoalwater
10 To 60 Nm-Coastal Waters From Point Grenville To Cape
Shoalwater Out 10 Nm-East Entrance U.S. Waters Strait Of
Juan De Fuca-West Entrance U.S. Waters Strait Of Juan De
Fuca.
Gale Warning from 4 AM to 4 PM PST Wednesday for West Entrance
U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory from 8 AM Wednesday to 10 AM PST Thursday
for Central U.S. Waters Strait Of Juan De Fuca.
Gale Warning from 4 AM Wednesday to 10 AM PST Thursday for
Admiralty Inlet-Coastal Waters From Cape Flattery To James
Island 10 To 60 Nm-Coastal Waters From Cape Flattery To
James Island Out 10 Nm-Coastal Waters From James Island To
Point Grenville 10 To 60 Nm-Coastal Waters From James
Island To Point Grenville Out 10 Nm-Coastal Waters From
Point Grenville To Cape Shoalwater 10 To 60 Nm-Coastal
Waters From Point Grenville To Cape Shoalwater Out 10 Nm-
East Entrance U.S. Waters Strait Of Juan De Fuca-Northern
Inland Waters Including The San Juan Islands.
&&The office that day
Everything else NWS Seattle, WA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 9:12 AM PST | Gale Warning | SEW | 6 hr | |
| Dec 25, 9:12 AM PST | Small Craft Advisory | SEW | 13 hr | |
| Dec 25, 9:12 AM PST | Storm Warning | SEW | 28 hr | |
| Dec 25, 1:29 PM PST | Wind Advisory | SEW | San Juan | 24 hr |
| Dec 25, 3:01 PM PST | Coastal Flood Warning | SEW | 19 hr | |
| Dec 25, 3:01 PM PST | Coastal Flood Advisory | SEW | 21 hr |
Nearby
High Wind Warnings in Washington, 2024Every high wind warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.