Alert archive / California / Winter Storm Warnings in 2025
Winter Storm Warning 9, NWS Eureka, CA
NWS Eureka, CA issued this winter storm warning at Mar 30, 2025, 12:29 PM PDT for Trinity County, California. It took effect at Mar 30, 2025, 11:00 PM PDT. It was in force for 42 hr. 1 report 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
- Mar 30, 2025, 12:29 PM PDT (19:29 UTC)
- In effect from
- Mar 30, 2025, 11:00 PM PDT
- Expired
- Apr 1, 2025, 5:00 PM PDT
- In force
- 42 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 19:30 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 1, 7:00 AM PDT | SNOW 8 | 2 Wnw Ruth, CA | Received 8 inches between 7-9am. Station Elevation: 3094 ft. |
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, 7.5 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1193 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 80 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
749 WWUS46 KEKA 301929 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 1229 PM PDT Sun Mar 30 2025 CAZ107-108-310330- /O.NEW.KEKA.WS.W.0009.250331T0600Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Hwy 3-Scott Mountain, Hwy 36-South Fork Mountain, Hwy 299-Buckhorn Summit, Ruth, and Hwy 3-Hayfork Summit 1229 PM PDT Sun Mar 30 2025 ...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT TUESDAY... * WHAT...Heavy snow expected for elevations above 3000 feet. Total snow accumulations between 8 and 12 inches. Up to 2 feet over Scott Mountain Pass. * WHERE...Trinity County. * WHEN...From 11 PM this evening to 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. * ADDITIONAL DETAILS...Snow level starts at 4500 feet this evening, lowering to 3000 feet tonight. 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. 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. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka ZVS
6 follow-up statements
407 WWUS46 KEKA 301956 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 1256 PM PDT Sun Mar 30 2025 CAZ107-108-310400- /O.CON.KEKA.WS.W.0009.250331T0600Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Hwy 3-Scott Mountain, Hwy 36-South Fork Mountain, Hwy 299-Buckhorn Summit, Ruth, and Hwy 3-Hayfork Summit 1256 PM PDT Sun Mar 30 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM PDT TUESDAY... * WHAT...Heavy snow expected for elevations above 3000 feet. Total snow accumulations between 8 and 12 inches. Up to 2 feet over Scott Mountain Pass. * WHERE...Trinity County. * WHEN...From 11 PM this evening to 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. * ADDITIONAL DETAILS...Snow level starts at 4500 feet this evening, lowering to 3000 feet tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order. && $$ CAZ105-310400- /O.NEW.KEKA.WW.Y.0010.250401T0000Z-250402T0000Z/ Northern Humboldt Interior- Including Hwy 299-Berry Summit 1256 PM PDT Sun Mar 30 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM MONDAY TO 5 PM PDT TUESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 3 inches at Berry Summit Pass in highway 299. Locally higher amounts over peaks. * WHERE...Northern Humboldt Interior. * WHEN...From 5 PM Monday to 5 PM PDT Tuesday. * 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. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka ZVS
129 WWUS46 KEKA 310350 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 850 PM PDT Sun Mar 30 2025 CAZ107-108-311200- /O.CON.KEKA.WS.W.0009.250331T0600Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Hwy 36-South Fork Mountain, Hwy 299-Buckhorn Summit, Hwy 3-Scott Mountain, Ruth, and Hwy 3-Hayfork Summit 850 PM PDT Sun Mar 30 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY... * WHAT...Heavy snow expected for elevations above 3000 feet. Total snow accumulations between 8 and 12 inches. Up to 2 feet over Scott Mountain Pass. * WHERE...Trinity County. * WHEN...Until 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. * ADDITIONAL DETAILS...Snow level starts at 4500 feet this evening, lowering to 3000 feet tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order. && $$ CAZ105-311200- /O.CON.KEKA.WW.Y.0010.250401T0000Z-250402T0000Z/ Northern Humboldt Interior- Including Hwy 299-Berry Summit 850 PM PDT Sun Mar 30 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM MONDAY TO 5 PM PDT TUESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 4 inches above 2500 ft, including Berry Summit on Highway 299. Locally higher amounts over peaks. * WHERE...Northern Humboldt Interior. * WHEN...From 5 PM Monday to 5 PM PDT Tuesday. * 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. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka JB
983 WWUS46 KEKA 311134 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 434 AM PDT Mon Mar 31 2025 CAZ107-108-311945- /O.CON.KEKA.WS.W.0009.000000T0000Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Hwy 299-Buckhorn Summit, Hwy 3-Hayfork Summit, Hwy 36-South Fork Mountain, Hwy 3-Scott Mountain, and Ruth 434 AM PDT Mon Mar 31 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY... * WHAT...Heavy snow expected for elevations above 3000 feet. Total snow accumulations between 8 and 12 inches. Up to 2 feet over Scott Mountain Pass and other higher peaks. * WHERE...Trinity County. * WHEN...Until 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order. && $$ CAZ105-311945- /O.CON.KEKA.WW.Y.0010.250401T0000Z-250402T0000Z/ Northern Humboldt Interior- Including Hwy 299-Berry Summit 434 AM PDT Mon Mar 31 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM PDT TUESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 4 inches above 2500 ft, including Berry Summit on Highway 299. Locally higher amounts over peaks. * WHERE...Northern Humboldt Interior. * WHEN...From 5 PM this afternoon to 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. 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. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka JLW
866 WWUS46 KEKA 311947 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 1247 PM PDT Mon Mar 31 2025 CAZ107-108-010515- /O.CON.KEKA.WS.W.0009.000000T0000Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Ruth, Hwy 3-Hayfork Summit, Hwy 299-Buckhorn Summit, Hwy 3-Scott Mountain, and Hwy 36-South Fork Mountain 1247 PM PDT Mon Mar 31 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY... * WHAT...Heavy snow expected for elevations above 3000 feet. Total snow accumulations between 8 and 12 inches. Up to 2 feet over Scott Mountain Pass and other higher peaks. * WHERE...Trinity County. * WHEN...Until 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. * ADDITIONAL DETAILS...Snow level starts at 4500 feet this evening, lowering to 3000 feet tonight. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order. && $$ CAZ105-010515- /O.CON.KEKA.WW.Y.0010.250401T0000Z-250402T0000Z/ Northern Humboldt Interior- Including Hwy 299-Berry Summit 1247 PM PDT Mon Mar 31 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM PDT TUESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 4 inches above 2500 ft, including Berry Summit on Highway 299. Locally higher amounts over peaks. * WHERE...Northern Humboldt Interior. * WHEN...From 5 PM this afternoon to 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. 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. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka
626 WWUS46 KEKA 010502 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 1002 PM PDT Mon Mar 31 2025 CAZ107-108-020000- /O.CON.KEKA.WS.W.0009.000000T0000Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Hwy 36-South Fork Mountain, Hwy 299-Buckhorn Summit, Hwy 3-Hayfork Summit, Ruth, and Hwy 3-Scott Mountain 1002 PM PDT Mon Mar 31 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY... * WHAT...Heavy snow expected for elevations above 3000 feet. Total snow accumulations between 8 and 12 inches. Up to 2 feet over Scott Mountain Pass and other higher peaks. * WHERE...Trinity County. * WHEN...Until 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. Tire chains may be necessary if travelling through mountain passes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order. && $$ CAZ105-020000- /O.CON.KEKA.WW.Y.0010.000000T0000Z-250402T0000Z/ Northern Humboldt Interior- Including Hwy 299-Berry Summit 1002 PM PDT Mon Mar 31 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM PDT TUESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 4 inches above 2500 ft, including Berry Summit on Highway 299. Locally higher amounts over peaks. * WHERE...Northern Humboldt Interior. * WHEN...Until 5 PM PDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. 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. && $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka JB
423 WWUS46 KEKA 012345 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 445 PM PDT Tue Apr 1 2025 CAZ107-108-020045- /O.EXP.KEKA.WS.W.0009.000000T0000Z-250402T0000Z/ Northern Trinity-Southern Trinity- Including Hwy 299-Buckhorn Summit, Hwy 3-Scott Mountain, Hwy 36-South Fork Mountain, Ruth, and Hwy 3-Hayfork Summit 445 PM PDT Tue Apr 1 2025 ...WINTER STORM WARNING WILL EXPIRE AT 5 PM PDT THIS AFTERNOON... $$ CAZ105-020045- /O.EXP.KEKA.WW.Y.0010.000000T0000Z-250402T0000Z/ Northern Humboldt Interior- Including Hwy 299-Berry Summit 445 PM PDT Tue Apr 1 2025 ...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM PDT THIS AFTERNOON... $$ For hazard areas see https://www.wrh.noaa.gov/map/?wfo=eka EYS
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 12:49 PM PDT | Small Craft Advisory | EKA | 5 days | |
| Mar 30, 12:56 PM PDT | Winter Weather Advisory | EKA | Humboldt | 52 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.