Alert archive / California / Freeze Watches in 2021
Freeze Watch 13, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Dec 26, 2021, 2:50 PM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Dec 27, 2021, 9:00 PM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 26, 2021, 2:50 PM PST (22:50 UTC)
- In effect from
- Dec 27, 2021, 9:00 PM PST
- Expired
- Dec 27, 2021, 10:20 AM PST
- In force
- 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 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.
The nearest sounding before it
Medford/Jackson, OR (KMFR), launched 12:00Z, 10.8 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
- 704 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 227 m²/s²
- 0-3 km storm-relative helicity
- 333 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
479 WWUS76 KEKA 262250 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 250 PM PST Sun Dec 26 2021 CAZ101-103-109-270700- /O.NEW.KEKA.FZ.A.0013.211228T0500Z-211228T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 250 PM PST Sun Dec 26 2021 ...FREEZE WATCH IN EFFECT FROM MONDAY EVENING THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 28 possible. * WHERE...Coastal Del Norte, Northern Humboldt Coast and Mendocino Coast Counties. * WHEN...From Monday evening through Tuesday morning. * IMPACTS...Frost and freeze conditions could 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. && $$
2 follow-up statements
418 WWUS76 KEKA 270637 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1037 PM PST Sun Dec 26 2021 CAZ101-103-109-271445- /O.CON.KEKA.FZ.A.0013.211228T0500Z-211228T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 1037 PM PST Sun Dec 26 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM MONDAY EVENING THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 27 possible. * WHERE...Coastal Del Norte, Mendocino Coast and Northern Humboldt Coast Counties. * WHEN...From Monday evening through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
951 WWUS76 KEKA 271820 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1020 AM PST Mon Dec 27 2021 CAZ101-103-109-271930- /O.CAN.KEKA.FZ.A.0013.211228T0500Z-211228T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- 1020 AM PST Mon Dec 27 2021 ...FREEZE WATCH IS CANCELLED... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 26, 4:37 AM PST | Winter Weather Advisory | EKA | Del Norte, Humboldt, Mendocino | 29 hr |
Nearby
Freeze Watches in California, 2021Every freeze watch 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.