Alert archive / California / Freeze Watches in 2021
Freeze Watch 1, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Mar 9, 2021, 2:09 PM PST for Mendocino County, California. It took effect at Mar 11, 2021, 12:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 9, 2021, 2:09 PM PST (22:09 UTC)
- In effect from
- Mar 11, 2021, 12:00 AM PST
- Expired
- Mar 10, 2021, 2:31 PM PST
- In force
- Issued by
- NWS Eureka, CA
County Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 139 km from the middle of the area, began a volume at 22:10 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, 10.2 hours before the alert went out and 218 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
- 36 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 664 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
514 WWUS76 KEKA 092209 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 209 PM PST Tue Mar 9 2021 CAZ110-111-114-100615- /O.NEW.KEKA.HZ.A.0001.210311T0800Z-210311T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 209 PM PST Tue Mar 9 2021 ...HARD FREEZE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING... * WHAT...Sub-freezing temperatures from 22 to 29 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake County Counties. * WHEN...From late Wednesday night through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ109-112-113-115-100615- /O.NEW.KEKA.FZ.A.0001.210311T0800Z-210311T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake County- 209 PM PST Tue Mar 9 2021 ...FREEZE WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Mendocino Coast, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake County Counties. * WHEN...From late Wednesday night through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
3 follow-up statements
087 WWUS76 KEKA 100513 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 913 PM PST Tue Mar 9 2021 CAZ110-111-114-101315- /O.CON.KEKA.HZ.A.0001.210311T0800Z-210311T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 913 PM PST Tue Mar 9 2021 ...HARD FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING... * WHAT...Sub-freezing temperatures from 22 to 29 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake County Counties. * WHEN...From late Wednesday night through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ109-112-113-115-101315- /O.CON.KEKA.FZ.A.0001.210311T0800Z-210311T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake County- 913 PM PST Tue Mar 9 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Mendocino Coast, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake County Counties. * WHEN...From late Wednesday night through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
879 WWUS76 KEKA 101155 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 355 AM PST Wed Mar 10 2021 CAZ110-111-114-102300- /O.CON.KEKA.HZ.A.0001.210311T0800Z-210311T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 355 AM PST Wed Mar 10 2021 ...HARD FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY MORNING... * WHAT...Sub-freezing temperatures from 22 to 29 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake County. * WHEN...From late tonight through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ109-112-113-115-102300- /O.CON.KEKA.FZ.A.0001.210311T0800Z-210311T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake County- 355 AM PST Wed Mar 10 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH THURSDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Mendocino Coast, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake County Counties. * WHEN...From late tonight through Thursday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
916 WWUS76 KEKA 102231 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 231 PM PST Wed Mar 10 2021 CAZ110-111-114-110645- /O.UPG.KEKA.HZ.A.0001.210311T0800Z-210311T1700Z/ /O.NEW.KEKA.HZ.W.0001.210311T0800Z-210311T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 231 PM PST Wed Mar 10 2021 ...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Sub-freezing temperatures as low as 23 expected. * WHERE...Portions of Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake County Counties. Coldest temperatures in the low to mid 20s will be found in northeast Mendocino County around Covelo. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. 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. && $$ CAZ115-110645- /O.UPG.KEKA.FZ.A.0001.210311T0800Z-210311T1700Z/ /O.NEW.KEKA.FZ.W.0006.210311T0800Z-210311T1700Z/ Southern Lake County- 231 PM PST Wed Mar 10 2021 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Portions of Southern Lake County, including Upper Lake, Lakeport, and Clearlake. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing.. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ109-112-113-110645- /O.UPG.KEKA.FZ.A.0001.210311T0800Z-210311T1700Z/ /O.NEW.KEKA.FR.Y.0007.210311T0800Z-210311T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior- 231 PM PST Wed Mar 10 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of the Mendocino Coast just inland, Southwestern Mendocino Interior and Southeastern Mendocino Interior Counties, including Ukiah, Boonville, Hopland, Yorkville, and Navarro. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. 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. && $$ CAZ103-110645- /O.NEW.KEKA.FR.Y.0007.210311T0800Z-210311T1700Z/ Northern Humboldt Coast- 231 PM PST Wed Mar 10 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PST THURSDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of the Northern Humboldt Coast, including Blue Lake, McKinleyville, and Arcata. * WHEN...From midnight tonight to 9 AM PST Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 10:33 PM PST | Special Marine Warning | EKA | 27 min | |
| Mar 8, 11:11 PM PST | Special Marine Warning | EKA | 34 min | |
| Mar 8, 11:44 PM PST | Special Marine Warning | EKA | 31 min | |
| Mar 9, 2:09 PM PST | Hard Freeze Watch | EKA | Lake, Mendocino | 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.