Alert archive / California / Winter Storm Warnings in 2018
Winter Storm Warning 3, NWS Eureka, CA
NWS Eureka, CA issued this winter storm warning at Mar 22, 2018, 3:28 AM PDT for 4 counties in California. It took effect at Mar 22, 2018, 11:00 PM PDT. It was in force for 10 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 22, 2018, 3:28 AM PDT (10:28 UTC)
- In effect from
- Mar 22, 2018, 11:00 PM PDT
- Expired
- Mar 23, 2018, 8:34 AM PDT
- In force
- 10 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 60 km from the middle of the area, began a volume at 10:28 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 |
|---|---|---|---|
| Mar 23, 8:10 AM PDT | SNOW 1 | 7 E Bridgville, CA | 2800 FEET WITH 36 DEGREES. SNOW STARTED AT 1 AT 3 AM WITH 1 INCH ON GROUND. MODERATE FLAKES FALLING CURRENTLY. |
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 00:00Z, 10.5 hours before the alert went out and 204 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
- 3 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1510 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 278 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
318 WWUS46 KEKA 221028 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 328 AM PDT Thu Mar 22 2018 CAZ102-105>108-111-222330- /O.UPG.KEKA.WS.A.0004.180323T0600Z-180324T0600Z/ /O.NEW.KEKA.WS.W.0003.180323T0600Z-180324T0600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northeastern Mendocino Interior- 328 AM PDT Thu Mar 22 2018 ...WINTER STORM WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PDT FRIDAY ABOVE 2000 FEET... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the evening commute on Friday. Total snow accumulations of 4 to 8 inches, with localized amounts up to 18 inches above 3000 feet, are expected. * WHERE...Del Norte Interior, Interior Humboldt County, Northern Trinity, Southern Trinity and Northeastern Mendocino Interior County. Highways impacted include 199 near the Oregon border, 299 at Berry Summit, 299 at Oregon Mountain, 299 at Buckhorn Summit and portions of 3 and 36 above 2000 feet. * WHEN...Late this evening through Friday evening. Snowfall rates will increase during the day on Friday. Snow levels will slowly rise to 3000 feet Friday afternoon. * ADDITIONAL DETAILS...Slow down, allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. If driving, slow down. Allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. For a detailed view of the hazard area visit: http://www.wrh.noaa.gov/map/?wfo=eka && $$
4 follow-up statements
333 WWUS46 KEKA 222057 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 157 PM PDT Thu Mar 22 2018 CAZ102-105>108-111-230500- /O.CON.KEKA.WS.W.0003.180323T0600Z-180324T0600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northeastern Mendocino Interior- 157 PM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 11 PM PDT FRIDAY ABOVE 2000 FEET... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the evening commute on Friday. Total snow accumulations of 4 to 8 inches, with localized amounts up to 18 inches above 3000 feet, are expected. * WHERE...Del Norte Interior, Interior Humboldt County, Northern Trinity, Southern Trinity and Northeastern Mendocino Interior County. Highways impacted include 199 near the Oregon border, 299 at Berry Summit, 299 at Oregon Mountain, 299 at Buckhorn Summit and portions of 3 and 36 above 2000 feet. * WHEN...Late this evening through Friday evening. Snowfall rates will increase during the day on Friday. Snow levels will slowly rise to 3000 feet Friday afternoon. * ADDITIONAL DETAILS...Slow down, allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. If driving, slow down. Allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. For a detailed view of the hazard area visit: http://www.wrh.noaa.gov/map/?wfo=eka && $$
925 WWUS46 KEKA 230448 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 948 PM PDT Thu Mar 22 2018 CAZ102-105>108-111-231300- /O.CON.KEKA.WS.W.0003.180323T0600Z-180324T0600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northeastern Mendocino Interior- 948 PM PDT Thu Mar 22 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT FRIDAY ABOVE 2000 FEET... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the evening commute on Friday. Total snow accumulations of 4 to 8 inches, with localized amounts up to 18 inches above 3000 feet, are expected. * WHERE...Del Norte Interior, Interior Humboldt County, Northern Trinity, Southern Trinity and Northeastern Mendocino Interior County. Highways impacted include 199 near the Oregon border, 299 at Berry Summit, 299 at Oregon Mountain, 299 at Buckhorn Summit and portions of 3 and 36 above 2000 feet. * WHEN...Late this evening through Friday evening. Snowfall rates will increase during the day on Friday. Snow levels will slowly rise to 3000 feet Friday afternoon. Additional snow is expected Saturday as well. * ADDITIONAL DETAILS...Slow down, allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. If driving, slow down. Allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before travelling. Be alert for rock slides in mountainous terrain. For a detailed view of the hazard area visit: http://www.wrh.noaa.gov/map/?wfo=eka && $$
067 WWUS46 KEKA 231040 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 340 AM PDT Fri Mar 23 2018 CAZ107-108-111-232100- /O.CAN.KEKA.WS.W.0003.000000T0000Z-180324T0600Z/ /O.NEW.KEKA.WS.W.0004.180323T1700Z-180324T0600Z/ Northern Trinity-Southern Trinity-Northeastern Mendocino Interior- 340 AM PDT Fri Mar 23 2018 ...WINTER STORM WARNING IN EFFECT FROM 10 AM THIS MORNING TO 11 PM PDT THIS EVENING ABOVE 2000 FEET... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the evening commute. Total snow accumulations of 2 to 5 inches, with localized amounts up to 15 inches, are expected. * WHERE...Northern Trinity, Southern Trinity and Northeastern Mendocino County Interior. Highways impacted include 299, 3 and 36. * WHEN...Late this morning through this evening. Snowfall rates will increase during the day and peak by this evening. Snow levels will rise to 3000 feet this afternoon. Additional snow is expected on Saturday. * ADDITIONAL DETAILS...Slow down, allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. If driving, slow down. Allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. For a detailed view of the hazard area visit: http://www.wrh.noaa.gov/map/?wfo=eka && $$ CAZ102-105-106-232100- /O.CON.KEKA.WS.W.0003.000000T0000Z-180324T0600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior- 340 AM PDT Fri Mar 23 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 2000 FEET... * WHAT...Heavy snow occurring. Plan on difficult travel conditions, including during the evening commute. Additional snow accumulations of 6 to 8 inches, with localized amounts up to 18 inches, are expected. * WHERE...Del Norte Interior, Northern Humboldt Interior and Southern Humboldt County Interior. Highways impacted include 299, 36 and 199. * WHEN...This morning through this evening. Snowfall rates will increase during the day and peak by this evening. Snow levels will rise to 3000 feet this afternoon. Additional snow is expected on Saturday. * ADDITIONAL DETAILS...Slow down, allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are occurring. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. If driving, slow down. Allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. For a detailed view of the hazard area visit: http://www.wrh.noaa.gov/map/?wfo=eka && $$
284 WWUS46 KEKA 231534 WSWEKA URGENT - WINTER WEATHER MESSAGE National Weather Service Eureka CA 834 AM PDT Fri Mar 23 2018 CAZ102-105-106-231645- /O.CAN.KEKA.WS.W.0003.000000T0000Z-180324T0600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior- 834 AM PDT Fri Mar 23 2018 ...WINTER STORM WARNING IS CANCELLED... $$ CAZ111-231645- /O.CAN.KEKA.WS.W.0004.180323T1700Z-180324T0600Z/ Northeastern Mendocino Interior- 834 AM PDT Fri Mar 23 2018 ...WINTER STORM WARNING IS CANCELLED... $$ CAZ107-108-232345- /O.CON.KEKA.WS.W.0004.180323T1700Z-180324T0600Z/ Northern Trinity-Southern Trinity- 834 AM PDT Fri Mar 23 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING ABOVE 2000 FEET... * WHAT...Heavy snow expected. Plan on difficult travel conditions, including during the evening commute. Total snow accumulations of 2 to 5 inches, with localized amounts up to 12 inches, are expected. * WHERE...Trinity County. Highways impacted include Hwy 299, 3, and 36. * WHEN...10 AM to 11 PM today. * ADDITIONAL DETAILS...Slow down, allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before traveling. Be alert for rock slides in mountainous terrain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions are expected. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. If driving, slow down. Allow extra time and be prepared for changing conditions. Check the latest forecasts and call 1-800-427-7623 for current road conditions and chain requirements before travelling. Be alert for rock slides in mountainous terrain. For a detailed view of the hazard area visit: http://www.wrh.noaa.gov/map/?wfo=eka && $$
Nearby
Winter Storm Warnings in California, 2018Every winter storm warning in 2018
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.