Alert archive / California / Freeze Warnings in 2021
Freeze Warning 26, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Dec 29, 2021, 3:24 AM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Dec 30, 2021, 12:00 AM PST. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 29, 2021, 3:24 AM PST (11:24 UTC)
- In effect from
- Dec 30, 2021, 12:00 AM PST
- Expired
- Dec 30, 2021, 9:00 AM PST
- In force
- 9 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 47 km from the middle of the area, began a volume at 11:26 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.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 00:00Z, 11.4 hours before the alert went out and 210 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
- 534 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 261 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
048 WWUS76 KEKA 291124 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 324 AM PST Wed Dec 29 2021 CAZ101-103-109-291930- /O.UPG.KEKA.FZ.A.0014.211230T0800Z-211230T1700Z/ /O.NEW.KEKA.FZ.W.0026.211230T0800Z-211230T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 324 AM PST Wed Dec 29 2021 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Coastal Del Norte, Northern Humboldt Coast and Mendocino Coast Counties. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
4 follow-up statements
885 WWUS76 KEKA 291755 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 955 AM PST Wed Dec 29 2021 CAZ101-103-109-300200- /O.CON.KEKA.FZ.W.0026.211230T0800Z-211230T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 955 AM PST Wed Dec 29 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Coastal Del Norte, Mendocino Coast and Northern Humboldt Coast Counties. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
693 WWUS76 KEKA 292308 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 308 PM PST Wed Dec 29 2021 CAZ101-103-109-300715- /O.CON.KEKA.FZ.W.0026.211230T0800Z-211230T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 308 PM PST Wed Dec 29 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Coastal Del Norte, Mendocino Coast and Northern Humboldt Coast Counties. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
411 WWUS76 KEKA 300658 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1058 PM PST Wed Dec 29 2021 CAZ101-103-109-301700- /O.CON.KEKA.FZ.W.0026.211230T0800Z-211230T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 1058 PM PST Wed Dec 29 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST THURSDAY... * WHAT...Sub-freezing temperatures as low as 28 expected. * WHERE...Coastal Del Norte, Mendocino Coast and Northern Humboldt Coast Counties. * WHEN...Until 9 AM PST Thursday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
786 WWUS76 KEKA 301645 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 845 AM PST Thu Dec 30 2021 CAZ101-103-109-301745- /O.EXP.KEKA.FZ.W.0026.000000T0000Z-211230T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 845 AM PST Thu Dec 30 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PST THIS MORNING... $$
Nearby
Freeze Warnings in California, 2021Every freeze warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.