Alert archive / California / Winter Storm Warnings in 2025

Winter Storm Warning 4, NWS Eureka, CA

February 5, 2025Trinity County, California

NWS Eureka, CA issued this winter storm warning at Feb 5, 2025, 2:50 PM PST for Trinity County, California. It took effect at Feb 6, 2025, 10:00 AM PST. It was in force for 22 hr. 4 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
Feb 5, 2025, 2:50 PM PST (22:50 UTC)
In effect from
Feb 6, 2025, 10:00 AM PST
Expired
Feb 7, 2025, 8:00 AM PST
In force
22 hr
Issued by
NWS Eureka, CA

County Trinity County, CA

The radar

The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 22:50 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
Feb 6, 1:18 PM PSTSNOW/ICE DMG5 Se Lewiston, CAAround 4 to 8 inches of snow is on the ground at this location. Tracker trailer is blocking the entire roadway (SR299). Another vehicle is stuck in the snow.
Feb 6, 7:13 PM PSTSNOW 62 Wnw Ruth, CA6 INCHES FROM 10AM TO 5PM.
Feb 6, 8:51 PM PSTSNOW 1010 Ne Weaverville, CASnowed all day.
Feb 6, 8:51 PM PSTSNOW 1210 Ne Weaverville, CAUpdated previous report for snow from 10 NE Weaverville. Snowed all day. 2 more inches of snow for 12 inches in total.

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

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 10.8 hours before the alert went out and 193 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, Medford/Jackson, OR at 12:00Z on 2025-02-05Temperature 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, Medford/Jackson, OR at 12:00Z on 2025-02-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 157 square meters per square second.1939587897117Sfc1 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
887 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
157 m²/s²
0-3 km storm-relative helicity
245 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

270 
WWUS46 KEKA 052250
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
250 PM PST Wed Feb 5 2025

CAZ107-060700-
/O.NEW.KEKA.WS.W.0004.250206T1800Z-250207T1800Z/
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
Northern Trinity-
Including Hwy 3-Scott Mountain
250 PM PST Wed Feb 5 2025

...WINTER STORM WARNING IN EFFECT FROM 10 AM THURSDAY TO 10 AM PST 
FRIDAY ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...For the Winter Weather Advisory ABOVE 1500 FEET, snow. 
  Additional snow accumulations up to one inch. For the Winter Storm 
  Warning ABOVE 2500, heavy snow expected. Total snow accumulations 
  between 8 and 13 inches.

* WHERE...Northern Trinity.

* WHEN...For the Winter Weather Advisory, until 7 PM PST this 
  evening. For the Winter Storm Warning, from 10 AM Thursday to 10 
  AM PST Friday.

* IMPACTS...Travel could be very difficult. Roads, and especially 
  bridges and overpasses, will likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ102-060700-
/O.NEW.KEKA.WW.Y.0004.250207T0000Z-250207T1800Z/
/O.CON.KEKA.WS.W.0003.000000T0000Z-250206T0600Z/
Del Norte Interior-
Including Gasquet and Hwy 199-Collier Tunnel
250 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THURSDAY TO 10 AM PST 
FRIDAY ABOVE 2500 FEET...
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...For the Winter Storm Warning ABOVE 1500 FEET, heavy snow. 
  Additional snow accumulations up to 3 inches. For the Winter 
  Weather Advisory ABOVE 2500 FEET, snow expected. Total snow 
  accumulations up to 6 inches.

* WHERE...Del Norte Interior.

* WHEN...For the Winter Storm Warning, until 10 PM PST this evening. 
  For the Winter Weather Advisory, from 4 PM Thursday to 10 AM PST 
  Friday.

* IMPACTS...Travel could be very difficult. Roads, and especially 
  bridges and overpasses, will likely become slick and hazardous. 
  Visibilities may drop below 1/4 mile due to falling and blowing 
  snow. The strong winds and weight of snow on tree limbs may down 
  power lines and could cause sporadic power outages.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Persons should delay all travel if possible. If travel is absolutely 
necessary, drive with extreme caution and be prepared for sudden 
changes in visibility. Leave plenty of room between you and the 
motorist ahead of you, and allow extra time to reach your 
destination. Avoid sudden braking or acceleration, and be especially 
cautious on hills or when making turns. Make sure your car is 
winterized and in good working order.

Persons should consider delaying all travel. Motorists should use 
extreme caution if travel is absolutely necessary.

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.

&&

$$

CAZ105-060700-
/O.NEW.KEKA.WW.Y.0004.250207T0000Z-250207T1800Z/
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
Northern Humboldt Interior-
Including Hwy 101-Prairie Creek Summit, Orleans, Hwy 299-Berry
Summit, and Bald Hills Rd
250 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THURSDAY TO 10 AM PST 
FRIDAY ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...For the first Winter Weather Advisory ABOVE 1500 FEET, 
  snow. Additional snow accumulations up to one inch. For the second 
  Winter Weather Advisory ABOVE 2500 FEET, snow expected. Total snow 
  accumulations between 2 and 8 inches.

* WHERE...Northern Humboldt Interior.

* WHEN...For the first Winter Weather Advisory ABOVE 1500 FEET, 
  until 7 PM PST this evening. For the second Winter Weather 
  Advisory ABOVE 2500 FEET, from 4 PM Thursday to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Roads, and especially 
  bridges and overpasses, will likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ108-060700-
/O.NEW.KEKA.WW.Y.0004.250206T1800Z-250207T1800Z/
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
Southern Trinity-
Including Ruth
250 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 10 AM 
PST FRIDAY ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...For the first Winter Weather Advisory ABOVE 1500 FEET, 
  snow. Additional snow accumulations up to one inch. For the second 
  Winter Weather Advisory ABOVE 2500, snow expected. Total snow 
  accumulations between 4 and 9 inches.

* WHERE...Southern Trinity.

* WHEN...For the first Winter Weather Advisory, until 7 PM PST this 
  evening. For the second Winter Weather Advisory, from 10 AM 
  Thursday to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Roads, and especially 
  bridges and overpasses, will likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ101-060200-
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0200Z/
Coastal Del Norte-
Including Crescent City, Smith River, and Klamath
250 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST THIS 
EVENING...

* WHAT...Small hail accumulation will make roads icy and hazardous.

* WHERE...Del Norte Coast.

* WHEN...Until 6 PM PST this evening.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ106-060300-
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
Southern Humboldt Interior-
Including Dinsmore
250 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...Snow ABOVE 1500 FEET. Additional snow accumulations up to 
  one inch.

* WHERE...Southern Humboldt Interior.

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

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous. Plan on slippery road 
  conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JLW
8 follow-up statements
341 
WWUS46 KEKA 060157
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
557 PM PST Wed Feb 5 2025

CAZ101-060300-
/O.EXP.KEKA.WW.Y.0003.000000T0000Z-250206T0200Z/
Coastal Del Norte-
Including Smith River, Crescent City, and Klamath
557 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 6 PM PST THIS EVENING...

The threat has ended.

$$

CAZ102-061000-
/O.CON.KEKA.WS.W.0003.000000T0000Z-250206T0600Z/
/O.CON.KEKA.WW.Y.0004.250207T0000Z-250207T1800Z/
Del Norte Interior-
Including Gasquet and Hwy 199-Collier Tunnel
557 PM PST Wed Feb 5 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS 
EVENING ABOVE 1500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THURSDAY TO 
10 AM PST FRIDAY...

* WHAT...For the Winter Storm Warning ABOVE 1500 FEET, heavy snow. 
  Additional snow accumulations up to 3 inches. For the Winter 
  Weather Advisory ABOVE 2500 FEET, snow expected. Total snow 
  accumulations up to 6 inches.

* WHERE...Del Norte Interior.

* WHEN...For the Winter Storm Warning, until 10 PM PST this evening. 
  For the Winter Weather Advisory, from 4 PM Thursday to 10 AM PST 
  Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous. Visibilities may drop below 1/4 
  mile due to falling and blowing snow. The strong winds and weight 
  of snow on tree limbs may down power lines and could cause 
  sporadic power outages. Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Persons should delay all travel if possible. If travel is absolutely 
necessary, drive with extreme caution and be prepared for sudden 
changes in visibility. Leave plenty of room between you and the 
motorist ahead of you, and allow extra time to reach your 
destination. Avoid sudden braking or acceleration, and be especially 
cautious on hills or when making turns. Make sure your car is 
winterized and in good working order.

Persons should consider delaying all travel. Motorists should use 
extreme caution if travel is absolutely necessary.

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.

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

CAZ107-061000-
/O.CON.KEKA.WS.W.0004.250206T1800Z-250207T1800Z/
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
Northern Trinity-
Including Hwy 3-Scott Mountain
557 PM PST Wed Feb 5 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THURSDAY TO 10 
AM PST FRIDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...For the Winter Weather Advisory ABOVE 1500 FEET, snow. 
  Additional snow accumulations up to one inch. For the Winter Storm 
  Warning ABOVE 2500, heavy snow expected. Total snow accumulations 
  between 8 and 13 inches.

* WHERE...Northern Trinity.

* WHEN...For the Winter Weather Advisory, until 7 PM PST this 
  evening. For the Winter Storm Warning, from 10 AM Thursday to 10 
  AM PST Friday.

* IMPACTS...Travel could be very difficult. Roads, and especially 
  bridges and overpasses, will likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ105-061000-
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
/O.CON.KEKA.WW.Y.0004.250207T0000Z-250207T1800Z/
Northern Humboldt Interior-
Including Hwy 101-Prairie Creek Summit, Orleans, Hwy 299-Berry
Summit, and Bald Hills Rd
557 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THURSDAY TO 
10 AM PST FRIDAY...

* WHAT...For the first Winter Weather Advisory ABOVE 1500 FEET, 
  snow. Additional snow accumulations up to one inch. For the second 
  Winter Weather Advisory ABOVE 2500 FEET, snow expected. Total snow 
  accumulations between 2 and 8 inches.

* WHERE...Northern Humboldt Interior.

* WHEN...For the first Winter Weather Advisory, until 7 PM PST this 
  evening. For the second Winter Weather Advisory, from 4 PM 
  Thursday to 10 AM PST Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous. Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ108-061000-
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
/O.CON.KEKA.WW.Y.0004.250206T1800Z-250207T1800Z/
Southern Trinity-
Including Ruth
557 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 
10 AM PST FRIDAY...

* WHAT...For the first Winter Weather Advisory ABOVE 1500 FEET, 
  snow. Additional snow accumulations up to one inch. For the second 
  Winter Weather Advisory ABOVE 2500, snow expected. Total snow 
  accumulations between 4 and 9 inches.

* WHERE...Southern Trinity.

* WHEN...For the first Winter Weather Advisory, until 7 PM PST this 
  evening. For the second Winter Weather Advisory, from 10 AM 
  Thursday to 10 AM PST Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous. Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CAZ106-060300-
/O.CON.KEKA.WW.Y.0003.000000T0000Z-250206T0300Z/
Southern Humboldt Interior-
Including Dinsmore
557 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 7 PM PST THIS 
EVENING ABOVE 1500 FEET...

* WHAT...For the first Winter Weather Advisory ABOVE 1500 FEET, 
  snow. Additional snow accumulations up to one inch. For the second 
  Winter Weather Advisory ABOVE 2500 FEET, snow expected. Total snow 
  accumulations between 2 and 8 inches.

* WHERE...Southern Humboldt Interior.

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

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous. Plan on slippery road 
  conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

Persons are urged to stay indoors until conditions improve. If you 
must go outside, dress in layers. Several layers of clothes will 
keep you warmer than a single heavy coat. Cover exposed skin to 
reduce your risk of frostbite or hypothermia. Gloves, a scarf, and a 
hat will keep you from losing your body heat.

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

ZVS
796 
WWUS46 KEKA 060421
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
821 PM PST Wed Feb 5 2025

CAZ102-061230-
/O.CAN.KEKA.WS.W.0003.000000T0000Z-250206T0600Z/
/O.CON.KEKA.WW.Y.0004.250207T0000Z-250207T1800Z/
Del Norte Interior-
Including Gasquet and Hwy 199-Collier Tunnel
821 PM PST Wed Feb 5 2025

...WINTER STORM WARNING IS CANCELLED...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THURSDAY TO 
10 AM PST FRIDAY...

* WHAT...Snow expected above 2500 feet. Total snow accumulations up 
  to 6 inches.

* WHERE...Del Norte Interior.

* WHEN...From 4 PM Thursday to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Including Highway 199 at Collier Tunnel.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

CAZ107-061230-
/O.CON.KEKA.WS.W.0004.250206T1800Z-250207T1800Z/
Northern Trinity-
Including Hwy 3-Scott Mountain
821 PM PST Wed Feb 5 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THURSDAY TO 10 
AM PST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 8 and 
  13 inches.

* WHERE...Northern Trinity.

* WHEN...From 10 AM Thursday to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Including Highway 3 at Scott Mountain Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ108-061230-
/O.CON.KEKA.WW.Y.0004.250206T1800Z-250207T1800Z/
Southern Trinity-
821 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 
10 AM PST FRIDAY...

* WHAT...Snow expected. Total snow accumulations between 4 and 9 
  inches.

* WHERE...Southern Trinity.

* WHEN...From 10 AM Thursday to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

CAZ105-061230-
/O.CON.KEKA.WW.Y.0004.250207T0000Z-250207T1800Z/
Northern Humboldt Interior-
Including Hwy 299-Berry Summit
821 PM PST Wed Feb 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THURSDAY TO 
10 AM PST FRIDAY...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  between 2 and 8 inches.

* WHERE...Northern Humboldt Interior.

* WHEN...From 4 PM Thursday to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult.

* ADDITIONAL DETAILS...Including Highway 299 at Berry Summits.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

ZVS
416 
WWUS46 KEKA 061110
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
310 AM PST Thu Feb 6 2025

...FINAL ROUND OF SNOW THURSDAY AFTERNOON INTO FRIDAY...

.A final round of snow will impact the area Thursday afternoon into 
early Friday. Snow levels will start around 2000 feet but gradually 
increase into Friday morning. The heaviest snow will be focused at 
the high elevations of Trinity County with less amounts in Humboldt 
and Del Norte. Little more than a trace is expected further south 
except on the highest mountain peaks.

CAZ108-062300-
/O.UPG.KEKA.WW.Y.0004.250206T1800Z-250207T1800Z/
/O.EXA.KEKA.WS.W.0004.250206T1800Z-250207T1800Z/
Southern Trinity-
Including Hwy 3-Hayfork Summit and Hwy 36-South Fork Mountain
310 AM PST Thu Feb 6 2025

...WINTER STORM WARNING IN EFFECT FROM 10 AM THIS MORNING TO 10 AM 
PST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 3 and 
  7 inches along high elevations of highways 36 and 3. Up to 12 
  inches on high isolated peaks.

* WHERE...Southern Trinity.

* WHEN...From 10 AM this morning to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ107-062300-
/O.CON.KEKA.WS.W.0004.250206T1800Z-250207T1800Z/
Northern Trinity-
Including Hwy 299-Buckhorn Summit and Hwy 3-Scott Mountain
310 AM PST Thu Feb 6 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 
10 AM PST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations between 3 and 
  8 inches along high elevations of highways 299 and 3. Higher 
  amounts of up to 16 inches on high peaks including Scott Mountain 
  pass.

* WHERE...Northern Trinity.

* WHEN...From 10 AM this morning to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ102-105-062300-
/O.EXT.KEKA.WW.Y.0004.250206T1800Z-250207T1800Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit, Hwy 199-Collier Tunnel, and Bald
Hills Rd
310 AM PST Thu Feb 6 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO 
10 AM PST FRIDAY...

* WHAT...Snow expected. Total snow accumulations between 3 and 5 
  inches along high elevations of highways 299, 199, and 36. Higher 
  amounts up to 12 inches on high isolated peaks.

* WHERE...Del Norte Interior and Northern Humboldt Interior.

* WHEN...From 10 AM this morning to 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JHW
348 
WWUS46 KEKA 061819
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1019 AM PST Thu Feb 6 2025

CAZ107-070230-
/O.CON.KEKA.WS.W.0004.000000T0000Z-250207T1800Z/
Northern Trinity-
Including Hwy 299-Buckhorn Summit and Hwy 3-Scott Mountain
1019 AM PST Thu Feb 6 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet. Total snow 
  accumulations between 3 and 8 inches along high elevations of 
  highways 299 and 3. Higher amounts of up to 16 inches on high 
  peaks including Scott Mountain pass.

* WHERE...Northern Trinity.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

* ADDITIONAL DETAILS...Including Highway 3 at Scott Mountain Pass.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ108-070230-
/O.CON.KEKA.WS.W.0004.000000T0000Z-250207T1800Z/
Southern Trinity-
Including Hwy 36-South Fork Mountain and Hwy 3-Hayfork Summit
1019 AM PST Thu Feb 6 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet. Total snow 
  accumulations between 3 and 7 inches along high elevations of 
  highways 36 and 3. Up to 12 inches on high isolated peaks.

* WHERE...Southern Trinity.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ102-105-070230-
/O.CON.KEKA.WW.Y.0004.000000T0000Z-250207T1800Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 199-Collier Tunnel, Hwy 299-Berry Summit, and Bald
Hills Rd
1019 AM PST Thu Feb 6 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY 
FOR ELEVATIONS ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  between 3 and 5 inches along high elevations of highways 299, 199, 
  and 36. Higher amounts up to 12 inches on high isolated peaks.

* WHERE...Del Norte Interior and Northern Humboldt Interior.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

MKK
094 
WWUS46 KEKA 062246
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
246 PM PST Thu Feb 6 2025

...FINAL ROUND OF SNOW THIS AFTERNOON INTO FRIDAY MORNING...

.Snow levels have risen slightly, but many areas they remain around 
2500 feet. This is causing impacts on many of the highway summits 
this afternoon and this will continue into the evening, although 
snow levels may rise slightly more. Snow levels are then expected to 
drop tonight.

CAZ107-070700-
/O.CON.KEKA.WS.W.0004.000000T0000Z-250207T1800Z/
Northern Trinity-
Including Hwy 299-Buckhorn Summit and Hwy 3-Scott Mountain
246 PM PST Thu Feb 6 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet. Total snow 
  accumulations between 3 and 7 inches along high elevations of 
  highways 299 and 3. Higher amounts of up to 12 inches above 4000 
  feet including Scott Mountain pass.

* WHERE...Northern Trinity.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ108-070700-
/O.CON.KEKA.WS.W.0004.000000T0000Z-250207T1800Z/
Southern Trinity-
Including Hwy 36-South Fork Mountain and Hwy 3-Hayfork Summit
246 PM PST Thu Feb 6 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet. Total snow 
  accumulations between 3 and 7 inches along high elevations of 
  highways 36 and 3. Up to 12 inches on high isolated peaks.

* WHERE...Southern Trinity.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ102-105-070700-
/O.CON.KEKA.WW.Y.0004.000000T0000Z-250207T1800Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 199-Collier Tunnel, Hwy 299-Berry Summit, and Bald
Hills Rd
246 PM PST Thu Feb 6 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST FRIDAY 
FOR ELEVATIONS ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  between 3 and 5 inches along high elevations of highways 299, 199, 
  and 36. Higher amounts up to 12 inches above 4000 feet.

* WHERE...Del Norte Interior and Northern Humboldt Interior.

* WHEN...Until 10 AM PST Friday.

* IMPACTS...Travel could be very difficult. Tire chains may be 
  necessary if travelling through mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

MKK
424 
WWUS46 KEKA 070617
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1017 PM PST Thu Feb 6 2025

CAZ107-071200-
/O.EXT.KEKA.WS.W.0004.000000T0000Z-250207T1200Z/
Northern Trinity-
Including Hwy 299-Buckhorn Summit and Hwy 3-Scott Mountain
1017 PM PST Thu Feb 6 2025

...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet. Total snow 
  accumulations between 3 and 7 inches along high elevations of 
  highways 299 and 3. Higher amounts of up to 12 inches above 4000 
  feet including Scott Mountain pass.

* WHERE...Northern Trinity.

* WHEN...Until 4 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ108-071200-
/O.EXT.KEKA.WS.W.0004.000000T0000Z-250207T1200Z/
Southern Trinity-
Including Hwy 3-Hayfork Summit and Hwy 36-South Fork Mountain
1017 PM PST Thu Feb 6 2025

...WINTER STORM WARNING NOW IN EFFECT UNTIL 4 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet. Total snow 
  accumulations between 3 and 7 inches along high elevations of 
  highways 36 and 3. Up to 12 inches on high isolated peaks.

* WHERE...Southern Trinity.

* WHEN...Until 4 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ102-105-071200-
/O.EXT.KEKA.WW.Y.0004.000000T0000Z-250207T1200Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 199-Collier Tunnel, Hwy 299-Berry Summit, and Bald
Hills Rd
1017 PM PST Thu Feb 6 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 AM PST FRIDAY FOR 
ELEVATIONS ABOVE 2500 FEET...

* WHAT...Snow expected above 2500 feet. Total snow accumulations 
  between 3 and 5 inches along high elevations of highways 299, 199, 
  and 36. Higher amounts up to 12 inches above 4000 feet.

* WHERE...Del Norte Interior and Northern Humboldt Interior.

* WHEN...Until 4 AM PST Friday.

* IMPACTS...Travel could be very difficult. Snow chains may be 
  required.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

ZVS
875 
WWUS46 KEKA 071052
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
252 AM PST Fri Feb 7 2025

CAZ107-071600-
/O.EXT.KEKA.WS.W.0004.000000T0000Z-250207T1600Z/
Northern Trinity-
Including Hwy 299-Buckhorn Summit and Hwy 3-Scott Mountain
252 AM PST Fri Feb 7 2025

...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 AM PST THIS MORNING 
FOR ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet will gradually 
  diminish. Additional snow accumulations up to 3 inches. Winds 
  gusting as high as 35 mph.

* WHERE...Northern Trinity.

* WHEN...Until 8 AM PST this morning.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ108-071600-
/O.EXT.KEKA.WS.W.0004.000000T0000Z-250207T1600Z/
Southern Trinity-
Including Hwy 3-Hayfork Summit and Hwy 36-South Fork Mountain
252 AM PST Fri Feb 7 2025

...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 AM PST THIS MORNING 
FOR ELEVATIONS ABOVE 2500 FEET...

* WHAT...Heavy snow for elevations above 2500 feet will gradually 
  diminish. Additional snow accumulations up to 2 inches. Winds 
  gusting as high as 40 mph.

* WHERE...Southern Trinity.

* WHEN...Until 8 AM PST this morning.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

CAZ102-105-071600-
/O.EXT.KEKA.WW.Y.0004.000000T0000Z-250207T1600Z/
Del Norte Interior-Northern Humboldt Interior-
Including Bald Hills Rd, Hwy 299-Berry Summit, and Hwy
199-Collier Tunnel
252 AM PST Fri Feb 7 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 8 AM PST THIS MORNING 
FOR ELEVATIONS ABOVE 2500 FEET...

* WHAT...Snow for elevations above 2500 feet will gradually 
  diminish. Additional snow accumulations up to one inch.

* WHERE...Del Norte Interior and Northern Humboldt Interior.

* WHEN...Until 8 AM PST this morning.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road 
conditions for the state you are calling from can be obtained by 
calling 5 1 1.

&&

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JHW
147 
WWUS46 KEKA 071549
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
749 AM PST Fri Feb 7 2025

CAZ107-108-071700-
/O.EXP.KEKA.WS.W.0004.000000T0000Z-250207T1600Z/
Northern Trinity-Southern Trinity-
Including Hwy 36-South Fork Mountain, Hwy 299-Buckhorn Summit,
Hwy 3-Hayfork Summit, and Hwy 3-Scott Mountain
749 AM PST Fri Feb 7 2025

...WINTER STORM WARNING WILL EXPIRE AT 8 AM PST THIS MORNING...

The Threat has ended.

$$

CAZ102-105-071700-
/O.EXP.KEKA.WW.Y.0004.000000T0000Z-250207T1600Z/
Del Norte Interior-Northern Humboldt Interior-
Including Bald Hills Rd, Hwy 199-Collier Tunnel, and Hwy
299-Berry Summit
749 AM PST Fri Feb 7 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 AM PST THIS MORNING...

The threat has ended.

$$

For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka

JLW

What forecasters said that day

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

NWS Eureka, CA wrote its last area forecast discussion before this winter storm warning went out at Feb 5, 5:23 AM PST, 9 hours 27 minutes earlier.

Area forecast discussion, Feb 5, 5:23 AM PST, 9 hours 27 minutes before
AREA FORECAST DISCUSSION
National Weather Service Eureka CA
523 AM PST Wed Feb 5 2025

.SYNOPSIS...An upper level trough continues on the approach, cold
and wintry weather patterns unfold. Rivers are receding as
precipitation lightens up, allowing major stem rivers to exit flood
stage. The weekend may see a light showers with dry and chilly
weather expected early next week.

&&

.DISCUSSION...As the cold core upper level trough digs into the
area, concerns for low elevation snow/mixed precip/small hail have
been raised and rightfully so. Small hail especially can and has
wreaked havoc on motorists as it melts when accumulated onto warmer
pavement, creating an ice sheet and making commuting hazardous. That
said, southerly flow aloft has remnants of moist sub tropical air.
Though scant, this moist air has enough warmth to limit the effects
of the cold air mass, restricting the type of precip to liquid
droplet form rather than dendritic or supercooled aggregate being
perpetually suspended and accruing more ice by updraft-(hail). Model
soundings have freezing levels at low elevation and so some of the
components are in place for coastal hail and low elevation snow,
while other components are weak such as updraft and instability. An
initial period of hail has already occurred offshore and still
ongoing as of 12z. Temperatures overnight on the cost have been a
bit too warm but this could change today as the dynamics become more
favorable as the trough approaches and cold air advection continues
along with increased instability by the late morning-afternoon today.
Interior Del Norte and the northern Humboldt interior have below
freezing temperatures and likely snowfall as the MRMS mix of sensors
are indicating mtn snow falling as of 13z and several hours before.

Flood warnings for the Russian River at Hopland and Navarro are
ongoing as they have both crested in stage height and will continue
to recede, dropping below flood stage later today. River forecasts
show a future pulse around Friday, likely in response to the weak
Atmospheric River previously mentioned.

There may be a brief break in the rain tonight before another round
of rain and snow on Thursday. Snow levels are expected to be higher
with this next event, around 2500 to 3000 feet. So there may still
be impacts on the highway passes.

Friday and Saturday the upper level trough remains near the area.
This will keep temperatures chilly, especially the overnight lows.
Some very light precip is possible, but at this point it is
less likely. Sunday and Monday cool and dry conditions are expected.
/EYS

&&

.AVIATION...Post frontal conditions exist at all terminals spaces
this evening as conditions alternate between VFR & MVFR categories.
Conditions are expected to remain through the morning with southerly
winds switching to SE winds by the afternoon. Ceilings currently
forecasted to remain elevated around 2-3kft AGL with a moderately
strong SSW wind shear along the coast at 1.5-2kft AGL. Inland there
is a higher chance of showers impacting categories. In addition, the
NAMNEST is forecasting a valley inversion to develop tomorrow night
that could possibly create freezing rain  at KUKI.

&&

.MARINE...Winds will turn southwesterly and strengthen this
morning as a surface low pressure center passes over the
Washington/Oregon coast. Small craft advisory conditions are likely
with 25 to 30 knot gusts and 7 to 10 foot seas, especially in the
northern waters. Scattered convection embedded within lingering rain
showers is also possible, leading to the potential for small hail
over the coastal waters. Several small to moderate swells will make
for a conflicting sea state for the remainder of the week as winds
turn northerly again by Friday as yet another surface low pressure
center passes over central California.

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Winter Weather Advisory until 6 PM PST this evening for
     CAZ101.

     Winter Storm Warning until 10 PM PST this evening for
     CAZ102.

     Winter Weather Advisory until 10 AM PST this morning for
     CAZ104.

     Winter Weather Advisory until 7 PM PST this evening for
     CAZ105>108.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 8 PM PST this evening for PZZ450-
     470.

&&

Visit us at https://www.weather.gov/eureka

Follow us on Facebook and Twitter at:
https://www.facebook.com/NWSEureka
https://www.twitter.com/NWSEureka

For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png

In the hours before

Local storm report, Feb 5, 10:48 AM PST, 4 hours 2 minutes before
Preliminary Local Storm Report
National Weather Service Eureka CA
1048 AM PST Wed Feb 5 2025

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

1019 AM     Snow/Ice Dmg     5 SSW Weitchpec         41.12N 123.75W
02/05/2025                   Humboldt           CA   Law Enforcement

            45 foot semi truck went into ditch due to
            snow.

&&

JMM
Local storm report, Feb 5, 10:49 AM PST, 4 hours 1 minute before
Preliminary Local Storm Report
National Weather Service Eureka CA
1049 AM PST Wed Feb 5 2025

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

1019 AM     Snow/Ice Dmg     5 SSW Weitchpec         41.12N 123.75W
02/05/2025                   Humboldt           CA   Law Enforcement

            45 foot semi truck went into ditch due to
            snow. Junction of Pine Ridge Road and French
            Camp Road.

&&

JMM

The office that day

Everything else NWS Eureka, CA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 4, 6:29 PM PSTWinter Weather AdvisoryEKADel Norte, Humboldt, Trinity25 hr
Feb 4, 10:12 PM PSTWinter Storm WarningEKADel Norte22 hr
Feb 5, 2:50 PM PSTWinter Weather AdvisoryEKADel Norte, Humboldt, Trinity41 hr

Nearby

Winter Storm Warnings in California, 2025Every winter storm warning in 2025

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.