Alert archive / California / Freeze Watches in 2021
Freeze Watch 2, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Mar 15, 2021, 3:21 AM PDT for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Mar 16, 2021, 12:00 AM PDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 15, 2021, 3:21 AM PDT (10:21 UTC)
- In effect from
- Mar 16, 2021, 12:00 AM PDT
- Expired
- Mar 15, 2021, 1:38 PM PDT
- 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 10:22 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, 10.4 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
- 4 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 632 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
792 WWUS76 KEKA 151021 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 321 AM PDT Mon Mar 15 2021 CAZ110-111-114-152200- /O.NEW.KEKA.HZ.A.0002.210316T0700Z-210316T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 321 AM PDT Mon Mar 15 2021 ...HARD FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 24 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake County. * WHEN...From late tonight through Tuesday 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. && $$ CAZ101-103-104-112-113-115-152200- /O.NEW.KEKA.FZ.A.0002.210316T0700Z-210316T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 321 AM PDT Mon Mar 15 2021 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 27 possible. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake County. * WHEN...From late tonight through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
2 follow-up statements
644 WWUS76 KEKA 151029 CCA NPWEKA URGENT - WEATHER MESSAGE...CORRECTED National Weather Service Eureka CA 329 AM PDT Mon Mar 15 2021 CAZ110-111-114-152200- /O.NEW.KEKA.HZ.A.0002.210316T0700Z-210316T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 329 AM PDT Mon Mar 15 2021 ...HARD FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 24 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake County. * WHEN...From late tonight through Tuesday 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. && $$ CAZ101-103-104-112-113-115-152200- /O.COR.KEKA.FZ.A.0002.210316T0700Z-210316T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 329 AM PDT Mon Mar 15 2021 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake County. * WHEN...From late tonight through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
873 WWUS76 KEKA 152038 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 138 PM PDT Mon Mar 15 2021 CAZ110-111-114-161600- /O.UPG.KEKA.HZ.A.0002.210316T0700Z-210316T1600Z/ /O.NEW.KEKA.HZ.W.0002.210316T0700Z-210316T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 138 PM PDT Mon Mar 15 2021 ...HARD FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM TUESDAY... * WHAT...Sub-freezing temperatures as low as 22 expected. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake counties. * WHEN...From midnight tonight to 9 AM Tuesday. * 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 who have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. $$ CAZ101-103-104-112-113-115-161600- /O.UPG.KEKA.FZ.A.0002.210316T0700Z-210316T1600Z/ /O.NEW.KEKA.FZ.W.0010.210316T0700Z-210316T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 138 PM PDT Mon Mar 15 2021 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM TUESDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake counties. * WHEN...From midnight tonight to 9 AM Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 3:29 AM PDT | Hard Freeze Watch | EKA | Lake, Mendocino | 10 hr |
| Mar 15, 1:38 PM PDT | Freeze Warning | EKA | Del Norte, Humboldt, Mendocino | 19 hr |
| Mar 15, 1:38 PM PDT | Hard Freeze Warning | EKA | Lake, Mendocino | 19 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.