Winter Storm Warning 6, NWS Eureka, CA

702 
WWUS46 KEKA 110512
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1012 PM PDT Mon Mar 10 2025

CAZ107-108-111315-
/O.CON.KEKA.WS.W.0006.250312T0900Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
1012 PM PDT Mon Mar 10 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TO 8 PM PDT 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Heavy snow expected ABOVE 3500 FEET. Total snow 
  accumulations between 6 and 15 inches. Winds gusting as high as 45 
  mph.

* WHERE...Trinity County.

* WHEN...From 2 AM to 8 PM PDT Wednesday.

* IMPACTS...Travel could be very difficult on highways 3 and 36.

* ADDITIONAL DETAILS...Snow levels are forecast to initially start 
  out around 4500 feet Tuesday evening and then fall to 3000 feet 
  late Wednesday afternoon.

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.

&&

$$

CAZ102-105-111315-
/O.CON.KEKA.WS.A.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
1012 PM PDT Mon Mar 10 2025

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON 
THROUGH THURSDAY AFTERNOON ABOVE 2000 FEET...

* WHAT...Heavy snow possible ABOVE 2000 FEET. Total snow 
  accumulations between 4 and 6 inches possible.

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

* WHEN...From Wednesday afternoon through Thursday afternoon.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

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

JMM

264 
WWUS46 KEKA 111032
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
332 AM PDT Tue Mar 11 2025

CAZ107-108-111845-
/O.CON.KEKA.WS.W.0006.250312T0900Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
332 AM PDT Tue Mar 11 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TO 8 PM PDT 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Heavy snow expected ABOVE 3500 FEET. Total snow 
  accumulations between 5 and 14 inches. Winds gusting as high as 45 
  mph.

* WHERE...Trinity County.

* WHEN...From 2 AM to 8 PM PDT Wednesday.

* IMPACTS...Travel could be very difficult on highways 3 and 36.

* ADDITIONAL DETAILS...Snow levels are forecast to initially start 
  out around 4500 feet Tuesday evening and then fall to 3000 feet 
  late Wednesday afternoon.

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.

&&

$$

CAZ102-105-111845-
/O.CON.KEKA.WS.A.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
332 AM PDT Tue Mar 11 2025

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON 
THROUGH THURSDAY AFTERNOON ABOVE 2000 FEET ...

* WHAT...Heavy snow possible ABOVE 2000 FEET. Total snow 
  accumulations between 4 and 6 inches possible.

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

* WHEN...From Wednesday afternoon through Thursday afternoon.

* IMPACTS...Travel could be very difficult on highways 299 and 199.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

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

EYS

329 
WWUS46 KEKA 111839
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1139 AM PDT Tue Mar 11 2025

CAZ107-108-120245-
/O.CON.KEKA.WS.W.0006.250312T0900Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
1139 AM PDT Tue Mar 11 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TO 8 PM PDT 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Heavy snow expected ABOVE 3500 FEET. Total snow 
  accumulations between 5 and 15 inches. Winds gusting as high as 45 
  mph.

* WHERE...Trinity County.

* WHEN...From 2 AM to 8 PM PDT Wednesday.

* IMPACTS...Travel could be very difficult on highways 3 and 36.

* ADDITIONAL DETAILS...Snow levels are forecast to initially start 
  out around 4500 feet Tuesday evening and then fall to 3000 feet 
  late Wednesday afternoon. Snow levels are then expected to fall to 
  1500 to 2500 feet Wednesday evening  through Thursday with 1 to 3 
  inches of accumulations expected.

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.

&&

$$

CAZ102-105-120245-
/O.CON.KEKA.WS.A.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
1139 AM PDT Tue Mar 11 2025

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON 
THROUGH THURSDAY AFTERNOON ABOVE 2000 FEET ...

* WHAT...Heavy snow possible ABOVE 2000 FEET. Total snow 
  accumulations between 4 and 6 inches possible.

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

* WHEN...From Wednesday afternoon through Thursday afternoon.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

&&

$$

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

DB

098 
WWUS46 KEKA 112002
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
102 PM PDT Tue Mar 11 2025

CAZ107-108-120415-
/O.CON.KEKA.WS.W.0006.250312T0900Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
102 PM PDT Tue Mar 11 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TO 8 PM PDT 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Heavy snow expected ABOVE 3500 FEET. Total snow 
  accumulations between 8 and 15 inches. Winds gusting as high as 45 
  mph.

* WHERE...Trinity County.

* WHEN...From 2 AM to 8 PM PDT Wednesday.

* IMPACTS...Travel could be very difficult to impossible. Tire 
  chains may be necessary if travelling through mountain passes. 
  Gusty winds could bring down tree branches.

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.

&&

$$

CAZ102-105-120415-
/O.UPG.KEKA.WS.A.0005.250313T0000Z-250314T0000Z/
/O.NEW.KEKA.WW.Y.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
102 PM PDT Tue Mar 11 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM WEDNESDAY TO 5 PM PDT 
THURSDAY ABOVE 2000 FEET ...

* WHAT...Snow expected ABOVE 2000 FEET. Total snow accumulations 
  between 2 and 6 inches.

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

* WHEN...From 5 PM Wednesday to 5 PM PDT Thursday.

* IMPACTS...Travel could be very difficult on highways 299 and 199.

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

DB

382 
WWUS46 KEKA 120400
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
900 PM PDT Tue Mar 11 2025

CAZ107-108-121200-
/O.CON.KEKA.WS.W.0006.250312T0900Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
900 PM PDT Tue Mar 11 2025

...WINTER STORM WARNING REMAINS IN EFFECT FROM 2 AM TO 8 PM PDT 
WEDNESDAY ABOVE 3500 FEET...

* WHAT...Heavy snow expected ABOVE 3500 FEET. Total snow 
  accumulations between 8 and 15 inches. Winds gusting as high as 45 
  mph.

* WHERE...Trinity County.

* WHEN...From 2 AM to 8 PM PDT Wednesday.

* IMPACTS...Travel could be very difficult on highways 3 and 36.

* ADDITIONAL DETAILS...Snow levels are forecast to initially start 
  out around 4500 feet Tuesday evening and then fall to 3000 feet 
  late Wednesday afternoon. Snow levels are then expected to fall to 
  1500 to 2500 feet Wednesday evening  through Thursday with 1 to 3 
  inches of accumulations expected.

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.

&&

$$

CAZ102-105-121200-
/O.CON.KEKA.WW.Y.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
900 PM PDT Tue Mar 11 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM WEDNESDAY TO 
5 PM PDT THURSDAY ABOVE 2000 FEET ...

* WHAT...Snow expected ABOVE 2000 FEET. Total snow accumulations 
  between 2 and 6 inches.

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

* WHEN...From 5 PM Wednesday to 5 PM PDT Thursday.

* IMPACTS...Travel could be very difficult on highways 299 and 199.

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

JB

845 
WWUS46 KEKA 121111
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
411 AM PDT Wed Mar 12 2025

CAZ107-108-121915-
/O.CON.KEKA.WS.W.0006.000000T0000Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
411 AM PDT Wed Mar 12 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS 
EVENING ABOVE 3500 FEET...

* WHAT...Heavy snow expected ABOVE 3500 FEET. Total snow 
  accumulations between 8 and 15 inches. Winds gusting as high as 45 
  mph.

* WHERE...Trinity County.

* WHEN...Until 8 PM PDT this evening.

* IMPACTS...Travel could be very difficult on highways 3 and 36.

* ADDITIONAL DETAILS...Snow levels are forecast to initially start 
  out around 4500 feet Tuesday evening and then fall to 3000 feet 
  late Wednesday afternoon. Snow levels are then expected to fall to 
  1500 to 2500 feet Wednesday evening  through Thursday with 1 to 3 
  inches of accumulations expected.

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.

&&

$$

CAZ102-105-121915-
/O.CON.KEKA.WW.Y.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
411 AM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS 
AFTERNOON TO 5 PM PDT THURSDAY ABOVE 2000 FEET ...

* WHAT...Snow expected ABOVE 2000 FEET. Total snow accumulations 
  between 2 and 6 inches.

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

* WHEN...From 5 PM this afternoon to 5 PM PDT Thursday.

* IMPACTS...Travel could be very difficult on highways 299 and 199.

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

EYS

250 
WWUS46 KEKA 121907
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
1207 PM PDT Wed Mar 12 2025

CAZ107-108-130300-
/O.CON.KEKA.WS.W.0006.000000T0000Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 3-Scott Mountain
1207 PM PDT Wed Mar 12 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS 
EVENING ABOVE 3500 FEET...

* WHAT...Heavy snow ABOVE 3500 FEET. Additional snow accumulations 
  between 4 and 8 inches. Winds gusting as high as 50 mph.

* WHERE...Trinity County.

* WHEN...Until 8 PM PDT this evening.

* IMPACTS...Travel could be very difficult. Gusty winds could bring 
  down tree branches.

* ADDITIONAL DETAILS...Snow levels are forecast to initially start 
  out around 4500 feet Tuesday evening and then fall to 3000 feet 
  late Wednesday afternoon. Snow levels are then expected to fall to 
  1500 to 2500 feet Wednesday evening  through Thursday with 1 to 3 
  inches of accumulations expected.

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.

&&

$$

CAZ102-105-130315-
/O.CON.KEKA.WW.Y.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Hwy 299-Berry Summit
1207 PM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS 
AFTERNOON TO 5 PM PDT THURSDAY ABOVE 2000 FEET ...

* WHAT...Snow expected ABOVE 2000 FEET. Total snow accumulations 
  between 2 and 6 inches.

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

* WHEN...From 5 PM this afternoon to 5 PM PDT Thursday.

* IMPACTS...Travel could be very difficult on highways 299 and 199.

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

DB

286 
WWUS46 KEKA 122040
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
140 PM PDT Wed Mar 12 2025

CAZ107-108-130545-
/O.NEW.KEKA.WS.A.0006.250314T0800Z-250315T0600Z/
/O.CON.KEKA.WS.W.0006.000000T0000Z-250313T0300Z/
Northern Trinity-Southern Trinity-
Including Hwy 36-South Fork Mountain, Hwy 299-Buckhorn Summit,
Hwy 3-Hayfork Summit, Weaverville, Hayfork, Forest Glen, Big Bar,
Hyampom, Ruth, Trinity Center, Hwy 3-Scott Mountain, and Hwy
299-Oregon Mountain
140 PM PDT Wed Mar 12 2025

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH 
FRIDAY EVENING...
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS 
EVENING ABOVE 3500 FEET...

* WHAT...For the Winter Storm Warning ABOVE 3500 FEET, heavy snow. 
  Additional snow accumulations between 1 and 6 inches. Winds 
  gusting as high as 50 mph. For the Winter Storm Watch, heavy snow 
  possible. Total snow accumulations 4 to 10 inches possible. Winds 
  could gust as high as 35 mph.

* WHERE...Trinity County.

* WHEN...For the Winter Storm Warning, until 8 PM PDT this evening. 
  For the Winter Storm Watch, from late Thursday night through 
  Friday evening.

* IMPACTS...Travel could be very difficult. Gusty winds could bring 
  down tree branches.

* ADDITIONAL DETAILS...Snow levels are expected to fall to 2500 feet 
  this evening and then to 1500 feet by Thursday morning with 1 to 3 
  inches of accumulations expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

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.

&&

$$

CAZ110-115-130545-
/O.NEW.KEKA.WS.A.0006.250314T1200Z-250314T2000Z/
/O.EXB.KEKA.WW.Y.0005.250313T0600Z-250313T1800Z/
Northwestern Mendocino Interior-Southern Lake-
Including Laytonville, Potter Valley, Middletown, Knobcone Camp,
Lakeport, Hwy 101-Ridgewood Summit, Oasis, Cobb, Hwy
101-Rattlesnake Summit, Hidden Valley Lake, Legget, Clearlake,
and Willits
140 PM PDT Wed Mar 12 2025

...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH 
FRIDAY AFTERNOON...
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 
AM PDT THURSDAY ABOVE 2000 FEET...

* WHAT...For the Winter Weather Advisory ABOVE 2000 FEET, wet snow 
  expected. Total snow accumulations up to 2 inches. For the Winter 
  Storm Watch ABOVE 2000 FEET, heavy wet snow possible. Total snow 
  accumulations up to 5 inches possible. Winds could gust as high as 
  40 mph.

* WHERE...Northwestern Mendocino Interior and Southern Lake.

* WHEN...For the Winter Weather Advisory, from 11 PM this evening to 
  11 AM PDT Thursday. For the Winter Storm Watch, from late Thursday 
  night through Friday afternoon.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Thursday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

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.

&&

$$

CAZ111-114-130545-
/O.NEW.KEKA.WS.A.0006.250314T0600Z-250315T0600Z/
/O.EXB.KEKA.WW.Y.0005.250313T0600Z-250313T1800Z/
Northeastern Mendocino Interior-Northern Lake-
Including Gravelly Valley Airport and Covelo
140 PM PDT Wed Mar 12 2025

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY 
EVENING...
...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 
AM PDT THURSDAY ABOVE 2000 FEET...

* WHAT...For the Winter Weather Advisory ABOVE 2000 FEET, snow 
  expected. Total snow accumulations up to two inches. For the 
  Winter Storm Watch, heavy snow possible. Total snow accumulations 
  up to 6 inches possible. Winds could gust as high as 40 mph.

* WHERE...Northeastern Mendocino Interior and Northern Lake.

* WHEN...For the Winter Weather Advisory, from 11 PM this evening to 
  11 AM PDT Thursday. For the Winter Storm Watch, from Thursday 
  evening through Friday evening.

* IMPACTS...Travel could be very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

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.

&&

$$

CAZ104-106-113-130545-
/O.EXB.KEKA.WW.Y.0005.250313T0600Z-250313T1800Z/
Southwestern Humboldt-Southern Humboldt Interior-Southeastern
Mendocino Interior-
Including Calpella, Pepperwood, Honeydew, Whitethorn, Redwood
Valley, Garberville, Briceland, Kneeland, Dinsmore, Hopland,
Ukiah, Shelter Cove, Bridgeville, and Alderpoint
140 PM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 
AM PDT THURSDAY ABOVE 2000 FEET...

* WHAT...Snow expected ABOVE 2000 FEET. Total snow accumulations up 
  to two inches.

* WHERE...Southern Humboldt, and Southeastern Mendocino Interior.

* WHEN...From 11 PM this evening to 11 AM PDT Thursday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Thursday morning commute.

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.

&&

$$

CAZ102-105-130545-
/O.NEW.KEKA.WS.A.0006.250314T0600Z-250315T0600Z/
/O.CON.KEKA.WW.Y.0005.250313T0000Z-250314T0000Z/
Del Norte Interior-Northern Humboldt Interior-
Including Willow Creek, Hwy 299-Berry Summit, Hoopa, Orleans,
Bald Hills Rd, Hwy 199-Collier Tunnel, Hwy 101-Prairie Creek
Summit, and Gasquet
140 PM PDT Wed Mar 12 2025

...WINTER STORM WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY 
EVENING ABOVE 2500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS 
AFTERNOON TO 5 PM PDT THURSDAY ABOVE 2000 FEET ...

* WHAT...For the Winter Weather Advisory ABOVE 2000 FEET, snow 
  expected. Total snow accumulations between 2 and 5 inches. For the 
  Winter Storm Watch ABOVE 2500 FEET, heavy snow possible. Total 
  snow accumulations up to 6 inches possible. Winds could gust as 
  high as 45 mph.

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

* WHEN...For the Winter Weather Advisory, from 5 PM this afternoon 
  to 5 PM PDT Thursday. For the Winter Storm Watch, from Thursday 
  evening through Friday evening.

* IMPACTS...Travel could be very difficult. Gusty winds could bring 
  down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the latest forecasts for updates on this situation.

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

DB

631 
WWUS46 KEKA 130247
WSWEKA

URGENT - WINTER WEATHER MESSAGE
National Weather Service Eureka CA
747 PM PDT Wed Mar 12 2025

CAZ107-108-131100-
/O.EXP.KEKA.WS.W.0006.000000T0000Z-250313T0300Z/
/O.EXA.KEKA.WW.Y.0005.000000T0000Z-250314T0000Z/
/O.CON.KEKA.WS.A.0006.250314T0800Z-250315T0600Z/
Northern Trinity-Southern Trinity-
Including Forest Glen, Hyampom, Big Bar, Ruth, Hwy 3-Scott
Mountain, Hwy 299-Buckhorn Summit, Hwy 36-South Fork Mountain,
Hayfork, Trinity Center, Weaverville, Hwy 299-Oregon Mountain,
and Hwy 3-Hayfork Summit
747 PM PDT Wed Mar 12 2025

...WINTER STORM WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING...
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM PDT THURSDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT 
THROUGH FRIDAY EVENING...

* WHAT...For the Winter Weather Advisory, snow. Additional snow 
  accumulations up to 4 inches ABOVE 3000 FT. Up to 1 inch of snow 
  possible for the lowest valleys overnight. For the Winter Storm 
  Watch, heavy snow possible. Total snow accumulations up to 10 
  inches possible. Winds could gust as high as 35 mph.

* WHERE...Trinity County.

* WHEN...For the Winter Weather Advisory, until 5 PM PDT Thursday. 
  For the Winter Storm Watch, from late Thursday night through 
  Friday evening.

* IMPACTS...Travel could be very difficult on highways 3, 36, 299.

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.

Monitor the latest forecasts for updates on this situation.

&&

$$

CAZ102-105-131100-
/O.CON.KEKA.WW.Y.0005.000000T0000Z-250314T0000Z/
/O.CON.KEKA.WS.A.0006.250314T0600Z-250315T0600Z/
Del Norte Interior-Northern Humboldt Interior-
Including Gasquet, Hwy 299-Berry Summit, Hwy 101-Prairie Creek
Summit, Hoopa, Willow Creek, Bald Hills Rd, Hwy 199-Collier
Tunnel, and Orleans
747 PM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PDT THURSDAY 
ABOVE 2000 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING 
THROUGH FRIDAY EVENING ABOVE 2500 FEET...

* WHAT...Snow expected ABOVE 1500 FEET. Total snow accumulations 
  between 2 and 6 inches.

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

* WHEN...For the Winter Weather Advisory, until 5 PM PDT Thursday. 
  For the Winter Storm Watch, from Thursday evening through Friday 
  evening.

* IMPACTS...Travel could be very difficult on highways 299 and 199.

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.

Monitor the latest forecasts for updates on this situation.

&&

$$

CAZ110-115-131100-
/O.CON.KEKA.WW.Y.0005.250313T0600Z-250313T1800Z/
/O.CON.KEKA.WS.A.0006.250314T1200Z-250314T2000Z/
Northwestern Mendocino Interior-Southern Lake-
Including Cobb, Knobcone Camp, Potter Valley, Hwy 101-Ridgewood
Summit, Willits, Legget, Clearlake, Oasis, Laytonville, Lakeport,
Hidden Valley Lake, Middletown, and Hwy 101-Rattlesnake Summit
747 PM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING 
TO 11 AM PDT THURSDAY ABOVE 2000 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE THURSDAY NIGHT 
THROUGH FRIDAY AFTERNOON...

* WHAT...For the Winter Weather Advisory ABOVE 2000 FEET, wet snow 
  expected. Total snow accumulations up to 2 inches. For the Winter 
  Storm Watch ABOVE 2000 FEET, heavy wet snow possible. Total snow 
  accumulations up to 5 inches possible. Winds could gust as high as 
  40 mph.

* WHERE...Northwestern Mendocino Interior and Southern Lake.

* WHEN...For the Winter Weather Advisory, from 11 PM this evening to 
  11 AM PDT Thursday. For the Winter Storm Watch, from late Thursday 
  night through Friday afternoon.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Thursday morning and evening commutes.

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.

Monitor the latest forecasts for updates on this situation.

&&

$$

CAZ111-114-131100-
/O.CON.KEKA.WW.Y.0005.250313T0600Z-250313T1800Z/
/O.CON.KEKA.WS.A.0006.250314T0600Z-250315T0600Z/
Northeastern Mendocino Interior-Northern Lake-
Including Gravelly Valley Airport and Covelo
747 PM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING 
TO 11 AM PDT THURSDAY ABOVE 2000 FEET...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY EVENING 
THROUGH FRIDAY EVENING...

* WHAT...For the Winter Weather Advisory ABOVE 2000 FEET, snow 
  expected. Total snow accumulations up to two inches. For the 
  Winter Storm Watch, heavy snow possible. Total snow accumulations 
  up to 6 inches possible. Winds could gust as high as 40 mph.

* WHERE...Northeastern Mendocino Interior and Northern Lake.

* WHEN...For the Winter Weather Advisory, from 11 PM this evening to 
  11 AM PDT Thursday. For the Winter Storm Watch, from Thursday 
  evening through Friday evening.

* 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.

Monitor the latest forecasts for updates on this situation.

&&

$$

CAZ104-106-113-131100-
/O.CON.KEKA.WW.Y.0005.250313T0600Z-250313T1800Z/
Southwestern Humboldt-Southern Humboldt Interior-Southeastern
Mendocino Interior-
Including Hopland, Pepperwood, Alderpoint, Dinsmore, Garberville,
Honeydew, Redwood Valley, Calpella, Kneeland, Whitethorn, Shelter
Cove, Briceland, Ukiah, and Bridgeville
747 PM PDT Wed Mar 12 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING 
TO 11 AM PDT THURSDAY ABOVE 2000 FEET...

* WHAT...For the Winter Weather Advisory ABOVE 2000 FEET, wet snow 
  expected. Total snow accumulations up to 2 inches. For the Winter 
  Storm Watch ABOVE 2000 FEET, heavy wet snow possible. Total snow 
  accumulations up to 5 inches possible. Winds could gust as high as 
  40 mph.

* WHERE...Southern Humboldt, and Southeastern Mendocino Interior.

* WHEN...From 11 PM this evening to 11 AM PDT Thursday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Thursday morning commute.

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

JB

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
508 AM PDT Mon Mar 10 2025

.SYNOPSIS...Mostly dry weather today although conditions are
changing synoptically as the ridge breaks down and the cutoff low
continues south and offshore of SoCal. Mid to high level clouds
are expected as moisture bands roll into the PACNW. Gusty south
winds expected Tuesday night into early Wednesday. Heavy rain and
heavy mountain snow is forecast late Tuesday night through
Wednesday. Additional bouts of rain and mountain snow expected to
follow late week into the weekend. Snow levels are forecast to
fall below 2000 feet Wednesday night and Thursday as rain showers
persist. Small hail possible Wednesday night and Thursday.

&&

.DISCUSSION...

KEY MESSAGES:

-Wet weather will return late Tuesday with moderate rain through
 the end of the week.

-Possible damaging wind for high elevations late Tuesday into
 early Wednesday. Greatest risk for populated areas along shore
 and in Lake County.

-Snow levels will drop through the week, dropping below 2000 feet
 by Thursday with periods of heavy snow over highways 299, 36, 3,
 and 199.

-Small hail and hazardous road conditions possible Wednesday
 night through Thursday

WEATHER PATTERN OVERVIEW:

The high pressure pattern, currently over the CWA, is
transitioning eastward and will give way to a large scale synoptic
troughing pattern Tuesday. Probabilities of precipitation are
low, with the exception of coastal drizzle. Conditions for today
remain warm and dry, with interior highs in the low to mid 60s
backing off just a couple degrees from the past couple of days.

A series of deep troughs will bring a return to wet and unsettled
weather by late Tuesday through the end of the week. Southerly wind
will begin to increase ahead of the troughs by late Tuesday
afternoon, peaking early Wednesday morning. A moderate jet of 35
to 50 kts at 800 mb is forecast to sweep the area early Wednesday
morning. This jet supports a 20 to 40% chance of gusts up to 55
mph on high ridges. That said, a generally stable environment will
limit the extend of winds mixing to populated lower elevation
locations. Models consistently show the lower elevation areas
with great wind potential are Crescent City and Clear Lake with
both have about a 20 to 40% chance of 45 mph gusts. Such speeds
are consistent with a minor risk of tree damage and isolated power
outages.

A consistent supply of moisture along the trough will help generate
widespread rain across the area, mostly during the day Wednesday.
Moisture transport is generally consistent with a weak to moderate
atmospheric river event, though the duration of the AR appears
limited. Most likely rain totals are about 2 to 3 inches at
higher elevations and 1 to 2 inches at lower elevations. Down
sloping effects will generally greatly decrease low elevation rain
amounts, especially around Humboldt Bay. Such amounts will
generate only minor to moderate urban and small stream flooding
concerns with less than a 10% chance of minor flooding along any
mainstem rivers. Convective potential increases late Wednesday
and persists into Thursday with more showery precipitation and a
slight risk for small hail as 500mb temperatures plunge to -30C.
Another pulse of organized rain with a post frontal trough is
probable on Friday.

The deep nature of the troughs will advect cold air across the area,
peaking Wednesday night into Thursday. Though snow levels will
starts as high as 4000 feet Tuesday night, there is a consistent
signal than snow levels will drop below 2000 feet by early
Thursday with upslope and evaporative cooling helping to drop snow
levels as low as 1000 feet, especially in Trinity County by Thursday
evening. Though precipitation will be inconsistent by this time,
impactful snowfall is expected on high elevation highway passes of
299, 36, 199, and 3 by early Thursday. 4 to 8 inches of snow is
generally most likely. Snow levels will most likely reach their
minimum early Friday morning, with a 25 to 50% chance of 1 inch of
snow as low as high elevations of highway 101 in Mendocino County
and around Cobb.

FORECAST CONFIDENCE AND DEVIATIONS:

Timing of the incoming system has remained remarkably consistent over
the past several model runs, with rain and wind set to begin to
Tuesday evening and peaking early during the day Wednesday. Rain
amounts, however, have proved more variables. While the chances of
high rain amounts have generally diminished, there remains a 20%
chance of localized amounts over 4 inches in terrain favored areas.
Such amounts would bring more moderate flood potential.

Similarly, the overall wind risk has trended downwards, but there
remains significant uncertainty, mostly dependent on the exact
strength and track of surface low pressure which remains very
uncertain. Generally speaking, however, only 10% of ensemble members
show a 800 mb jet any stronger than 50 mph. This generally caps the
overall maximum wind speed. In line with this, ensembles now show
essentially no chance of wind gusts over 70 mph along high terrain
with chances for damaging wind gusts over 55 mph dropping to near 30
mph even in the most exposed areas. Of note, however, the
possibility for stronger wind next weekend has actually increased
with 20% of models showing a low level jet up to 70 mph. As the
midweek event has generally trended more moderate, some attention
will have to paid to the weekend event.

On the snow side, confidence has remained high that snow levels will
drop strongly by Wednesday night. There is an 80% chance of
accumulating snow at locations such as Berry Summit and Collier
Tunnel by late Wednesday evening. These locations serve as a good
indicator of when the strongest impacts are most likely along area
highways. Snow is more uncertain further south and later in the
week. That said, the low snow level signature remains strong, most
of the uncertainty has to do with waning QPF potential during the
coldest periods. The possibility for impactful snow at Cobb and
along highway 101 bears close watching, but the potential for 1
inch or more of snow in these locations remains relatively low
around 30%. /DB/EYS

&&

.AVIATION...VFR conditions are present at the terminal spaces
currently. Offshore flow is expected overnight, keeping terminals
from being heavily impacted by low cloud ceilings. Winds will remain
light along the coast due to weaker pressure gradients than the last
few days. Come mid-morning today, lower cloud layers are forecasted
to fizzle out leaving only a BKN ceiling of high clouds. Tonight
into tomorrow, model guidance is suggesting possible NNW breezes
along exposed coastal terminals followed by possible fog/low clouds
forming briefly overnight. Later this week, Low level turbulence is
possible Tuesday afternoon/evening as a Low Level Jet stream is
forecasted to pass over coastal terminals.

&&

.MARINE...High pressure builds in again to start the week causing
northerly winds return by Monday afternoon. This weather pattern is
expected to be short-lived as another incoming low pressure system
will force strong southerly winds on Tuesday. There is potential for
a Gale Warning to be issued as the first of the extended Hi-Res
model guidance (FV3) is showing +34kt gusts from Tuesday late
evening through Wednesday morning as a frontal boundary sweeps
across the coastal seas. On Wednesday afternoon, forecasting
uncertainty increases significantly due to a potentially strong area
of low pressure forming in the NE Pacific, forcing areas of gale
force winds could form. As this system gets into the range of the
higher resolution models in the next couple days (48-56hrs out) this
uncertainty should be resolved better. Thursday winds look to become
north or northwest, yet again this will depend on the exact position
of the to-be formed low pressure center. Friday and into the weekend
it looks like another strong system will again create high winds.

The current westerly swell is generally expected to continue around
7-8 ft @ 14-15s through today. Also on Monday, a southwest swell
around 4ft @ 8s moves into the waters and persists into Tuesday.
Also on Tuesday afternoon, another long period swell is forecast to
start building to around 8-10ft @ 15s on Wednesday. Later in the
week, a larger swell is possible and is currently forecast to peak
around 10-12 ft @ 15s, but confidence is lower given the uncertainty
of the forecast pattern with more updates/forecast confidence coming
within the next few days. MKK/DS

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Winter Storm Watch from Tuesday evening through Wednesday
     afternoon for CAZ107-108.

     Frost Advisory until 8 AM PDT this morning for CAZ110-111-
     114.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory from 3 AM to 3 PM PDT Wednesday for
     PZZ450-455.

     Small Craft Advisory from 9 PM Tuesday to 3 PM PDT
     Wednesday for PZZ470-475.

&&

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