Alert archive / California / Freeze Watches in 2021
Freeze Watch 6, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Oct 9, 2021, 1:26 PM PDT for 4 counties in California. It took effect at Oct 11, 2021, 1:00 AM PDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Oct 9, 2021, 1:26 PM PDT (20:26 UTC)
- In effect from
- Oct 11, 2021, 1:00 AM PDT
- Expired
- Oct 10, 2021, 5:00 AM PDT
- In force
- Issued by
- NWS Eureka, CA
Counties Humboldt County, CA, Lake County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 102 km from the middle of the area, began a volume at 20:27 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
Oakland, CA (KOAK), launched 12:00Z, 8.4 hours before the alert went out and 267 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 659 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
580 WWUS76 KEKA 092026 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 126 PM PDT Sat Oct 9 2021 CAZ106>108-110-111-114-100430- /O.NEW.KEKA.FZ.A.0006.211011T0800Z-211011T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 126 PM PDT Sat Oct 9 2021 ...FREEZE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY MORNING... * WHAT...Sub-freezing temperatures as low as 27 possible. * WHERE...Southern Humboldt Interior, Northern Trinity, Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From late Sunday night through Monday 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. && $$
2 follow-up statements
521 WWUS76 KEKA 100350 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 850 PM PDT Sat Oct 9 2021 CAZ106>108-110-111-114-101200- /O.CON.KEKA.FZ.A.0006.211011T0800Z-211011T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 850 PM PDT Sat Oct 9 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY MORNING... * WHAT...Sub-freezing temperatures as low as 27 possible. * WHERE...Southern Trinity, Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Trinity, Southern Humboldt Interior and Northern Lake Counties. * WHEN...From late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
257 WWUS76 KEKA 101200 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 500 AM PDT Sun Oct 10 2021 CAZ106>108-110-111-114-101300- /O.CAN.KEKA.FZ.A.0006.211011T0800Z-211011T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 500 AM PDT Sun Oct 10 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 |
|---|---|---|---|---|
| Oct 9, 2:29 AM PDT | Gale Watch | EKA | 24 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.