Alert archive / Washington / Blizzard Warnings in 2024

Blizzard Warning 2, NWS Pendleton, OR

November 18, 2024Kittitas County, Yakima County, Washington

NWS Pendleton, OR issued this blizzard warning at Nov 18, 2024, 2:21 PM PST for Kittitas County, Yakima County, Washington. It took effect at Nov 19, 2024, 4:00 PM PST. It was in force for 17 hr. 9 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Nov 18, 2024, 2:21 PM PST (22:21 UTC)
In effect from
Nov 19, 2024, 4:00 PM PST
Expired
Nov 20, 2024, 8:39 AM PST
In force
17 hr
Issued by
NWS Pendleton, OR

Counties Kittitas County, WA, Yakima County, WA

The radar

The Pendleton radar (KPDT), 188 km from the middle of the area, began a volume at 22:20 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.

What was reported inside it

TimeReportWhereRemark
Nov 20, 5:30 AM PSTSNOW 1.34 Nw Selah, WACocorahs station WA-YK-3 Selah 3.6 NW.
Nov 20, 6:00 AM PSTSNOW 1230 W Tieton, WA12-13 inches. Time estimated.
Nov 20, 7:00 AM PSTSNOW 2.54 Wnw West Valley, WACocorahs station WA-YK-8 Fruitvale 6.9 W.
Nov 20, 7:00 AM PSTSNOW 67 N Naches, WA.
Nov 20, 7:00 AM PSTSNOW 67 N Naches, WA
Nov 20, 7:00 AM PSTSNOW 6.510 Nnw Naches, WACocorahs station WA-YK-38 Selah 17.9 NW.
Nov 20, 7:00 AM PSTSNOW 1012 Wsw Ellensburg, WATree also fell down and damaged part of fence.
Nov 20, 7:00 AM PSTSNOW 1425 Sw South Cle Elum, WA.
Nov 20, 7:00 AM PSTSNOW 1425 Sw South Cle Elum, WA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salem/Mcnary, OR (KSLE), launched 12:00Z, 10.4 hours before the alert went out and 273 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.

Skew-T log-pSkew-T log-p diagram, Salem/Mcnary, OR at 12:00Z on 2024-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salem/Mcnary, OR at 12:00Z on 2024-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 106 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
595 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
106 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

735 
WWUS46 KPDT 182221
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
221 PM PST Mon Nov 18 2024

...STRONG WINDS AND MODERATE TO HEAVY SNOW WILL CREATE TREACHEROUS 
CONDITIONS ACROSS THE MOUNTAINS TUESDAY EVENING THROUGH WEDNESDAY 
MORNING...

.A strong offshore system will bring significant winds and snowfall 
to the mountains and slopes of the region. These will bring notably 
hazardous conditions, including periods of very low to whiteout 
visibilities, alongside accumulating snowfall.

WAZ522-190700-
/O.CAN.KPDT.WS.W.0008.000000T0000Z-241119T0600Z/
/O.NEW.KPDT.BZ.W.0002.241120T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
221 PM PST Mon Nov 18 2024

...BLIZZARD WARNING IN EFFECT FROM 4 PM TUESDAY TO 10 AM PST 
WEDNESDAY ABOVE 2000 FEET...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Blizzard conditions expected above 2000 feet. Total snow 
  accumulations between 8 and 20 inches. Winds gusting as high as 60 
  mph.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and 
  blowing snow. Whiteout conditions are expected and will make 
  travel treacherous and potentially life-threatening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

A Blizzard Warning means severe winter weather conditions are 
expected or occurring. Falling and blowing snow with strong winds 
are likely. This will lead to whiteout conditions, making travel 
extremely dangerous. Do not travel. If you must travel, have a 
winter survival kit with you. If you get stranded, stay in your 
vehicle.

&&

$$

ORZ509-190700-
/O.CAN.KPDT.WS.W.0008.000000T0000Z-241119T0600Z/
/O.NEW.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of Camp Sherman, La Pine, Sunriver, and
Sisters
221 PM PST Mon Nov 18 2024

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM TUESDAY TO 10 AM PST 
WEDNESDAY ABOVE 3500 FEET...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Snow expected above 3500 feet. Total snow accumulations 
  between 2 and 8 inches, locally 10+ across the peaks and crests. 
  Winds gusting as high as 60 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. Gusty winds 
  could bring down tree branches.

* ADDITIONAL DETAILS...Brief periods of near whiteout conditions may 
  be possible with this system. Widespread blizzard level conditions 
  should be limited to the peaks of the region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ523-190700-
/O.NEW.KPDT.WS.W.0009.241120T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Cliffdell, Appleton, and Cle Elum
221 PM PST Mon Nov 18 2024

...WINTER STORM WARNING IN EFFECT FROM 4 PM TUESDAY TO 10 AM PST 
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Significant snowfall with periods of heavy snowfall 
  rates will combine with low visibility to create very difficult 
  driving conditions.

* ADDITIONAL DETAILS...Significantly lowered visibilities in 
  stronger winds will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

WAZ026-190700-
/O.NEW.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
Kittitas Valley-
Including the cities of Ellensburg and Thorp
221 PM PST Mon Nov 18 2024

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM TUESDAY TO 10 AM PST 
WEDNESDAY...

* WHAT...Wet snow expected. Total snow accumulations 2 to 4 inches, 
  locally 6-8 across the higher terrain. Winds gusting as high as 35 
  mph.

* WHERE...Kittitas Valley.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Significant snowfall with periods of heavy snowfall 
  rates will combine with low visibility to create very difficult 
  driving conditions. The hazardous conditions could impact the 
  Tuesday evening and Wednesday morning commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

CG
6 follow-up statements
803 
WWUS46 KPDT 190611
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1011 PM PST Mon Nov 18 2024

...STRONG WINDS AND MODERATE TO HEAVY SNOW WILL CREATE TREACHEROUS 
CONDITIONS ACROSS THE MOUNTAINS TUESDAY EVENING THROUGH WEDNESDAY 
MORNING...

.A strong offshore system will bring significant winds and snowfall 
to the mountains and slopes of the region. These will bring notably 
hazardous conditions, including periods of very low to whiteout 
visibilities, alongside accumulating snowfall.

WAZ522-191530-
/O.CON.KPDT.BZ.W.0002.241120T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1011 PM PST Mon Nov 18 2024

...BLIZZARD WARNING REMAINS IN EFFECT FROM 4 PM TUESDAY TO 10 AM PST 
WEDNESDAY ABOVE 2000 FEET...

* WHAT...Blizzard conditions expected above 2000 feet. Total snow 
  accumulations between 8 and 20 inches. Winds gusting as high as 60 
  mph.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and 
  blowing snow. Whiteout conditions are expected and will make 
  travel treacherous and potentially life-threatening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

A Blizzard Warning means severe winter weather conditions are 
expected or occurring. Falling and blowing snow with strong winds 
are likely. This will lead to whiteout conditions, making travel 
extremely dangerous. Do not travel. If you must travel, have a 
winter survival kit with you. If you get stranded, stay in your 
vehicle.

&&

$$

WAZ523-191530-
/O.CON.KPDT.WS.W.0009.241120T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Cle Elum, Cliffdell, and Appleton
1011 PM PST Mon Nov 18 2024

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 PM TUESDAY TO 10 AM 
PST WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Heavy snowfall and very low visibility will create 
  extremely dangerous driving conditions. Gusty winds could bring 
  down tree branches.

* ADDITIONAL DETAILS...Significantly lowered visibilities in 
  stronger winds will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

ORZ509-191530-
/O.CON.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of Sunriver, La Pine, Camp Sherman, and
Sisters
1011 PM PST Mon Nov 18 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM TUESDAY TO 10 
AM PST WEDNESDAY ABOVE 3500 FEET...

* WHAT...Snow expected above 3500 feet. Total snow accumulations 
  between 2 and 8 inches, locally 10+ across the peaks and crests. 
  Winds gusting as high as 60 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. Strong winds 
  could cause extensive damage to trees and power lines.

* ADDITIONAL DETAILS...Brief periods of near whiteout conditions may 
  be possible with this system. Widespread blizzard level conditions 
  should be limited to the peaks of the region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ026-191530-
/O.CON.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
Kittitas Valley-
Including the cities of Ellensburg and Thorp
1011 PM PST Mon Nov 18 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM TUESDAY TO 10 
AM PST WEDNESDAY...

* WHAT...Wet snow expected. Total snow accumulations 2 to 4 inches, 
  locally 6-8 across the higher terrain. Winds gusting as high as 35 
  mph.

* WHERE...Kittitas Valley.

* WHEN...From 4 PM Tuesday to 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. The hazardous 
  conditions could impact the Tuesday evening and Wednesday morning 
  commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

BL
162 
WWUS46 KPDT 190852
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1252 AM PST Tue Nov 19 2024

WAZ522-192300-
/O.CON.KPDT.BZ.W.0002.241120T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1252 AM PST Tue Nov 19 2024

...BLIZZARD WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 
AM PST WEDNESDAY ABOVE 2000 FEET...

* WHAT...Blizzard conditions expected above 2000 feet. Total snow 
  accumulations between 8 and 20 inches. Winds gusting as high as 60 
  mph.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...From 4 PM this afternoon to 10 AM PST Wednesday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and 
  blowing snow. Whiteout conditions are expected and will make 
  travel treacherous and potentially life-threatening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

A Blizzard Warning means severe winter weather conditions are 
expected or occurring. Falling and blowing snow with strong winds 
are likely. This will lead to whiteout conditions, making travel 
extremely dangerous. Do not travel. If you must travel, have a 
winter survival kit with you. If you get stranded, stay in your 
vehicle.

&&

$$

WAZ523-192300-
/O.CON.KPDT.WS.W.0009.241120T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Cle Elum, Appleton, and Cliffdell
1252 AM PST Tue Nov 19 2024

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON 
TO 10 AM PST WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.

* WHEN...From 4 PM this afternoon to 10 AM PST Wednesday.

* IMPACTS...Heavy snowfall and very low visibility will create 
  extremely dangerous driving conditions. Gusty winds could bring 
  down tree branches.

* ADDITIONAL DETAILS...Significantly lowered visibilities in 
  stronger winds will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

WAZ030-192300-
/O.EXB.KPDT.WW.Y.0028.241120T0600Z-241120T1800Z/
Northwest Blue Mountains-
Including the cities of Ski Bluewood Resort
1252 AM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 
AM PST WEDNESDAY ABOVE 4000 FT...

* WHAT...Snow expected above 4000 ft. Total snow accumulations 
  between 6 and 8 inches. Winds gusting as high as 45 mph.

* WHERE...Northwest Blue Mountains.

* WHEN...From 10 PM this evening to 10 AM PST Wednesday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

ORZ509-192300-
/O.CON.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of La Pine, Sisters, Sunriver, and Camp
Sherman
1252 AM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS 
AFTERNOON TO 10 AM PST WEDNESDAY ABOVE 3500 FEET...

* WHAT...Snow expected above 3500 feet. Total snow accumulations 
  between 2 and 8 inches, locally 10+ across the peaks and crests. 
  Winds gusting as high as 60 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...From 4 PM this afternoon to 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. Strong winds 
  could cause extensive damage to trees and power lines.

* ADDITIONAL DETAILS...Brief periods of near whiteout conditions may 
  be possible with this system. Widespread blizzard level conditions 
  should be limited to the peaks of the region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ026-192300-
/O.CON.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
Kittitas Valley-
Including the cities of Ellensburg and Thorp
1252 AM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS 
AFTERNOON TO 10 AM PST WEDNESDAY...

* WHAT...Wet snow expected. Total snow accumulations 2 to 4 inches, 
  locally 6-8 across the higher terrain. Winds gusting as high as 35 
  mph.

* WHERE...Kittitas Valley.

* WHEN...From 4 PM this afternoon to 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. The hazardous 
  conditions could impact the Tuesday evening and Wednesday morning 
  commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

PDT
017 
WWUS46 KPDT 192248
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
248 PM PST Tue Nov 19 2024

WAZ522-200700-
/O.CON.KPDT.BZ.W.0002.241120T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Easton and Roslyn
248 PM PST Tue Nov 19 2024

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 10 AM PST WEDNESDAY 
ABOVE 2000 FEET...

* WHAT...Blizzard conditions expected above 2000 feet. Total snow 
  accumulations between 8 and 20 inches. Winds gusting as high as 60 
  mph.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and 
  blowing snow. Whiteout conditions are expected and will make 
  travel treacherous and potentially life-threatening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

A Blizzard Warning means severe winter weather conditions are 
expected or occurring. Falling and blowing snow with strong winds 
are likely. This will lead to whiteout conditions, making travel 
extremely dangerous. Do not travel. If you must travel, have a 
winter survival kit with you. If you get stranded, stay in your 
vehicle.

&&

$$

WAZ523-200700-
/O.CON.KPDT.WS.W.0009.241120T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Cliffdell, Appleton, and Cle Elum
248 PM PST Tue Nov 19 2024

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Heavy snowfall and very low visibility will create 
  extremely dangerous driving conditions. Widespread blowing snow 
  could significantly reduce visibility. Gusty winds could bring 
  down tree branches.

* ADDITIONAL DETAILS...Significantly lowered visibilities in 
  stronger winds will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

ORZ509-200700-
/O.CON.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of La Pine, Sisters, Camp Sherman, and
Sunriver
248 PM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Snow expected above 3500 feet. Total snow accumulations 
  between 2 and 8 inches, locally 10+ across the peaks and crests. 
  Winds gusting as high as 60 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow. Strong winds could cause extensive damage to trees and 
  power lines.

* ADDITIONAL DETAILS...Brief periods of near whiteout conditions may 
  be possible with this system. Widespread blizzard level conditions 
  should be limited to the peaks of the region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ026-200700-
/O.CON.KPDT.WW.Y.0028.241120T0000Z-241120T1800Z/
Kittitas Valley-
Including the cities of Thorp and Ellensburg
248 PM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY...

* WHAT...Wet snow expected. Total snow accumulations 2 to 4 inches, 
  locally 6-8 across the higher terrain. Winds gusting as high as 35 
  mph.

* WHERE...Kittitas Valley.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. The hazardous 
  conditions could impact the Tuesday evening and Wednesday morning 
  commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

WAZ030-200700-
/O.CON.KPDT.WW.Y.0028.241120T0600Z-241120T1800Z/
Northwest Blue Mountains-
Including the cities of Ski Bluewood Resort
248 PM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING 
TO 10 AM PST WEDNESDAY ABOVE 4000 FT...

* WHAT...Snow expected above 4000 ft. Total snow accumulations 
  between 6 and 8 inches. Winds gusting as high as 45 mph.

* WHERE...Northwest Blue Mountains.

* WHEN...From 10 PM this evening to 10 AM PST Wednesday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

MC
214 
WWUS46 KPDT 200603
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
1003 PM PST Tue Nov 19 2024

WAZ522-201530-
/O.CON.KPDT.BZ.W.0002.000000T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
1003 PM PST Tue Nov 19 2024

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 10 AM PST WEDNESDAY 
ABOVE 2000 FEET...

* WHAT...Blizzard conditions expected above 2000 feet. Total snow 
  accumulations between 8 and 20 inches. Winds gusting as high as 60 
  mph.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and 
  blowing snow. Whiteout conditions are expected and will make 
  travel treacherous and potentially life-threatening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

A Blizzard Warning means severe winter weather conditions are 
expected or occurring. Falling and blowing snow with strong winds 
are likely. This will lead to whiteout conditions, making travel 
extremely dangerous. Do not travel. If you must travel, have a 
winter survival kit with you. If you get stranded, stay in your 
vehicle.

&&

$$

WAZ523-201530-
/O.CON.KPDT.WS.W.0009.000000T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Cle Elum, Cliffdell, and Appleton
1003 PM PST Tue Nov 19 2024

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Periods of moderate and heavy snow will combine with low 
  visibilities to create difficult driving conditions. Gusty winds 
  could bring down tree branches.

* ADDITIONAL DETAILS...Significantly lowered visibilities in 
  stronger winds will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

ORZ509-201530-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of Sisters, La Pine, Camp Sherman, and
Sunriver
1003 PM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Snow expected above 3500 feet. Total snow accumulations 
  between 2 and 8 inches, locally 10+ across the peaks and crests. 
  Winds gusting as high as 60 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow. Strong winds could cause extensive damage to trees and 
  power lines.

* ADDITIONAL DETAILS...Brief periods of near whiteout conditions may 
  be possible with this system. Widespread blizzard level conditions 
  should be limited to the peaks of the region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ026-201530-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
Kittitas Valley-
Including the cities of Ellensburg and Thorp
1003 PM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY...

* WHAT...Wet snow expected. Total snow accumulations 2 to 4 inches, 
  locally 6-8 across the higher terrain. Winds gusting as high as 35 
  mph.

* WHERE...Kittitas Valley.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow. The hazardous conditions could impact the Wednesday 
  morning commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

WAZ030-201530-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
Northwest Blue Mountains-
Including the cities of Ski Bluewood Resort
1003 PM PST Tue Nov 19 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST 
WEDNESDAY ABOVE 4000 FT...

* WHAT...Snow expected above 4000 ft. Total snow accumulations 
  between 6 and 8 inches. Winds gusting as high as 45 mph.

* WHERE...Northwest Blue Mountains.

* WHEN...Until 10 AM PST Wednesday.

* IMPACTS...Travel could be difficult due to periods of moderate to 
  heavy snow. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

BL
985 
WWUS46 KPDT 201507
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
707 AM PST Wed Nov 20 2024

WAZ522-201800-
/O.CON.KPDT.BZ.W.0002.000000T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
707 AM PST Wed Nov 20 2024

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING 
ABOVE 2000 FEET...

* WHAT...Blizzard conditions expected above 2000 feet. Total snow 
  accumulations between 8 and 20 inches. Winds gusting as high as 60 
  mph.

* WHERE...Upper Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and 
  blowing snow. Whiteout conditions are expected and will make 
  travel treacherous and potentially life-threatening.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

A Blizzard Warning means severe winter weather conditions are 
expected or occurring. Falling and blowing snow with strong winds 
are likely. This will lead to whiteout conditions, making travel 
extremely dangerous. Do not travel. If you must travel, have a 
winter survival kit with you. If you get stranded, stay in your 
vehicle.

&&

$$

WAZ523-201800-
/O.CON.KPDT.WS.W.0009.000000T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Appleton, Cliffdell, and Cle Elum
707 AM PST Wed Nov 20 2024

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST THIS 
MORNING...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 16 
  inches. Winds gusting as high as 40 mph.

* WHERE...Lower Slopes of the Eastern Washington Cascades Crest.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. 

* ADDITIONAL DETAILS...Significantly lowered visibilities in 
  stronger winds will be possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons should consider delaying all travel. If travel is absolutely 
necessary, drive with extreme caution. Consider taking a winter 
storm kit along with you, including such items as tire chains, 
booster cables, flashlight, shovel, blankets and extra clothing. 
Also take water, a first aid kit, and anything else that would help 
you survive in case you become stranded.

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

ORZ509-201800-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of Camp Sherman, Sunriver, Sisters, and La
Pine
707 AM PST Wed Nov 20 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS 
MORNING ABOVE 3500 FEET...

* WHAT...Snow expected above 3500 feet. Total snow accumulations 
  between 2 and 8 inches, locally 10+ across the peaks and crests. 
  Winds gusting as high as 60 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. 

* ADDITIONAL DETAILS...Brief periods of near whiteout conditions may 
  be possible with this system. Widespread blizzard level conditions 
  should be limited to the peaks of the region.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

WAZ026-201800-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
Kittitas Valley-
Including the cities of Thorp and Ellensburg
707 AM PST Wed Nov 20 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS 
MORNING...

* WHAT...Wet snow expected. Total snow accumulations 2 to 4 inches, 
  locally 6-8 across the higher terrain. Winds gusting as high as 35 
  mph.

* WHERE...Kittitas Valley.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...The hazardous conditions could impact the Wednesday 
  morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

WAZ030-201800-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
Northwest Blue Mountains-
Including the cities of Ski Bluewood Resort
707 AM PST Wed Nov 20 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS 
MORNING ABOVE 4000 FT...

* WHAT...Snow expected above 4000 ft. Total snow accumulations 
  between 6 and 8 inches. Winds gusting as high as 45 mph.

* WHERE...Northwest Blue Mountains.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. Gusty winds could 
  bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting the website 
wsdot.wa.com/travel.

&&

$$

PDT
238 
WWUS46 KPDT 201639
WSWPDT

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pendleton OR
839 AM PST Wed Nov 20 2024

WAZ522-201745-
/O.CAN.KPDT.BZ.W.0002.000000T0000Z-241120T1800Z/
Upper Slopes of the Eastern Washington Cascades Crest-
Including the cities of Roslyn and Easton
839 AM PST Wed Nov 20 2024

...BLIZZARD WARNING IS CANCELLED...

Some light snow is still expected but blizzard conditions are no 
longer anticipated.

$$

WAZ523-201745-
/O.CAN.KPDT.WS.W.0009.000000T0000Z-241120T1800Z/
Lower Slopes of the Eastern Washington Cascades Crest-
Including the cities of Cliffdell, Appleton, and Cle Elum
839 AM PST Wed Nov 20 2024

...WINTER STORM WARNING IS CANCELLED...

Some light snow is still anticipated through the late morning.

$$

WAZ026-030-201745-
/O.CAN.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
Kittitas Valley-Northwest Blue Mountains-
Including the cities of Ski Bluewood Resort, Thorp, and
Ellensburg
839 AM PST Wed Nov 20 2024

...WINTER WEATHER ADVISORY IS CANCELLED...

Temperatures have risen above freezing in many areas, and any snow 
that falls would likely accumulate on grassy areas and colder 
surfaces.

$$

ORZ509-201800-
/O.CON.KPDT.WW.Y.0028.000000T0000Z-241120T1800Z/
East Slopes of the Oregon Cascades-
Including the cities of Sunriver, La Pine, Sisters, and Camp
Sherman
839 AM PST Wed Nov 20 2024

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS 
MORNING ABOVE 3500 FEET...

* WHAT...Snow above 3500 feet. Additional snow accumulations up to 2 
  inches. Winds gusting as high as 40 mph.

* WHERE...East Slopes of the Oregon Cascades.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Plan on slippery road conditions. 

* ADDITIONAL DETAILS...Snow is expected to continue through the late 
  morning, which could cause slipper road conditions.  Gusty winds 
  could also make driving in some areas difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions can be obtained by visiting tripcheck.com online, or by 
calling 5 1 1.

&&

$$

LN

What forecasters said that day

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

NWS Pendleton, OR wrote its last area forecast discussion before this blizzard warning went out at Nov 18, 9:58 AM PST, 4 hours 23 minutes earlier.

Area forecast discussion, Nov 18, 9:58 AM PST, 4 hours 23 minutes before
Area Forecast Discussion
National Weather Service Pendleton OR
958 AM PST Mon Nov 18 2024

.MORNING UPDATE...Looking at ongoing precipitation, the current
forecast seems to be doing a good job of conveying what we're
already seeing. Meanwhile, made some minor changes to the
temperatures to account for overnight lows. Main updates from this
morning were to winds Tuesday evening through early Wednesday
morning with our next significant system for the region. Models
are coming in much higher on winds, particularly in the WA
Cascades where we expect noteworthy snow to occur. To convey this,
wanted to at least increase winds a bit, but expect that if models
continue this trend that we will see another bump in forecast
conditions with the afternoon update. Wanted to convey this now as
we're less than 48 hours from onset and due to ongoing products
from the current winter system, we do not have any watches out
for this next system, so pushing out a forecast update will be the
way to go. Goatley/87

.AVIATION...18Z TAFS...VFR conditions currently at all sites, but
are expected to degrade to MVFR for KDLS/KRDM/KBDN due to light
snowfall leading to reduced visibilities during the early morning
hours on Tuesday. Ceilings will also drop late in the period as a
result of the incoming system, with KDLS dropping the lowest to
OVC025. Winds will be breezy this afternoon for
KDLS/KPDT/KRDM/KBDN/KALW/KPSC with sustained winds of 10-15 kts and
gusts of 20-25 kts. Winds will decrease this evening and continue to
dissipate through the end of the period. 75

&&

.PREV DISCUSSION... /issued 316 AM PST Mon Nov 18 2024/

SHORT TERM...Today through Wednesday...Following yesterdays cold
frontal passage the forecast area will be under a cool westerly flow
today as the upper level trough passes. This westerly flow will
continue to provide snow showers to the Cascade crest where Winter
Storm Warnings remain in effect through this evening. An additional
4 to 8 inches of accumulations will be possible mainly along the
Cascade crest at pass levels with lighter amounts along the lower
eastern slopes. The northern Blue Mountains will see some lingering
showers but with only additional accumulations of 2 to 5 inches so
the warnings will be dropped with the morning forecast issuance.

Overall, will see some lingering showers Monday night through
Tuesday as the westerly flow begins to transition to a southwest
flow ahead of the next system expected to arrive Tuesday night into
Wednesday. This system will be supported by a deepening upper level
trough over the eastern Pacific. A surge of moisture coming around
the bottom of the trough will tap into some tropical moisture to
form an Atmospheric River that moves into the Pacific NW coast late
Tuesday into Wednesday. This in turn will push a warm front across
the forecast area Tuesday night. Initial snow levels will start out
between 1500 to 3000 feet then rise into Wednesday to 3000 to 4500
feet. The lowest snow levels will be focused along the eastern
slopes of the Washington Cascades Tuesday night through Wednesday
where a pool of cold air will trapped. Other than the lower
elevations of the Lower Columbia Basin there will be some initial
snow before turning to rain Tuesday night or early Wednesday.
However, the eastern slopes of the Washington Cascades could see a
prolonged snow event resulting in some advisory and possible warning
type snow accumulations. The warm front will also be accompanied by
some windy southerly winds mainly across eastern Oregon. High wind
watches have been issued and are in effect for Tuesday night through
Wednesday morning.

LONG TERM...Thursday through Monday...

Bottom Line Up Front

1. Rain, rain and more rain

2. Southwest flow will bring 'warmer' temperatures rising snow levels

3. Localized areas of flooding possible

The long term will be a bit wet as as models show an upper level low
will remain parked off the coast. Clusters show that the only
variance in the long term is with the position of the upper level
low until the later portion of the long term. Southwesterly flow
into the region will keep a continuous flow moisture across the area
with an embedded atmospheric river that will remain through at least
Saturday. With that said, the long term will remain under wet
conditions through the entire long term period with what appears to
be little to no break in precipitation except on Saturday for mostly
for the Basin, central OR and north central OR. NBM shows 70-100%
probabilities of 0.40 inches of precipitation along the Cascades and
Blues with higher amounts along the crests and 0.30-0.40 inches
elsewhere through the CWA. Friday, probabilities drop slightly to 50-
80% for the same amount of precipitation as Thursday. Friday shows
the first signs of a decrease with central OR seeing 0.08-0.20
inches with 50-70% probabilities, 30-60% for the Basin and foothills
of the Blues to see 0.25-0.35 inches and 80-100% for above 0.50
inches along the mountains tops. Its going to be a very wet later
part of the work week.

Models show the southwest flow to continue through the period which
will allow temperatures to remain seasonal through the period with
the NBM showing temperatures to hover in the upper 40s to low 50s
for much of the lower and mid elevations while the higher elevations
will hover in the low to mid 30s. Even through Saturday elevations
below 3000 ft will remain above freezing. The southwest flow will
also aid in keeping the snow levels a bit higher with mostly the
higher crests seeing any snowfall. However, models do show that
beginning Friday night and Saturday morning, the upper level low
will begin to makes its way onshore and make its way across the
region. This will decrease the temperatures across the mid and
higher terrains with snow expected to reach as low as 2500 ft with
15-20% probabilities of near 2 inches along the I-84 corridor of the
Blue Mountains and 40-60% chance of near 3 inches along the I-80
corridor of the Cascades. However, clusters are bit out of sink with
the timing of the upper level low moving inland.

With all that said and the fact that the EFI is signaling this to be
a well above normal rainfall event, along with the moderate to high
confidence in the forecast, some localized flooding could occur due
to the rain amounts coupled with some slight snow melt. While no
widespread flooding is expected, be prepared as this will sure be a
wet one. Bennese/90

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  46  27  47  40 /  20  20  20  70
ALW  47  30  48  40 /  20  20  20  80
PSC  51  32  49  42 /  10  10  20  80
YKM  48  24  42  31 /  10  10  30 100
HRI  50  30  50  42 /  10  10  20  70
ELN  43  22  38  28 /  10  10  30  90
RDM  41  24  43  36 /  20  20  20  90
LGD  39  19  36  31 /  50  30  20  80
GCD  38  19  40  33 /  50  30  20  90
DLS  49  30  48  39 /  30  20  50  90

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...High Wind Watch from Tuesday afternoon through Wednesday morning
     for ORZ507-508-510-511.

     Winter Storm Warning until 10 PM PST this evening for ORZ509.

WA...Winter Storm Warning until 10 PM PST this evening for WAZ522.

&&

SHORT TERM...91
LONG TERM....90
AVIATION...75

In the hours before

Local storm report, Nov 18, 8:48 AM PST, 5 hours 33 minutes before
Preliminary Local Storm Report
National Weather Service Pendleton OR
848 AM PST Mon Nov 18 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1200 AM     Snow             15 E Weston             45.79N 118.11W
11/18/2024  E20.0 Inch       Umatilla           OR   Public

            20 inches of new snow since Saturday.
            Elevation 5087 ft.

&&
Local storm report, Nov 18, 11:43 AM PST, 2 hours 38 minutes before
Preliminary Local Storm Report
National Weather Service Pendleton OR
1143 AM PST Mon Nov 18 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1142 AM     Snow             30 W Tieton             46.64N 121.39W
11/18/2024  E18.0 Inch       Yakima             WA   Trained Spotter

            18 inches of new snow in 36 hours. Elevation
            4450 ft.

&&
Local storm report, Nov 18, 12:11 PM PST, 2 hours 10 minutes before
Preliminary Local Storm Report
National Weather Service Pendleton OR
1211 PM PST Mon Nov 18 2024

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1000 AM     Snow             30 W Tieton             46.64N 121.38W
11/18/2024  E12.0 Inch       Yakima             WA   Mesonet

            12 inches of new snow since 3 PM Saturday.
            Elevation 4440 ft. White Pass SNOTEL.

&&

The office that day

Everything else NWS Pendleton, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 18, 1:26 PM PSTHigh Wind WarningPDTColumbia, Walla Walla45 hr
Nov 18, 2:21 PM PSTWinter Storm WarningPDTKittitas, Klickitat, Yakima42 hr
Nov 18, 2:21 PM PSTWinter Weather AdvisoryPDTColumbia, Kittitas, Walla Walla, Yakima44 hr

Nearby

Blizzard Warnings in Washington, 2024Every blizzard 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.