Alert archive / California / Freeze Watches in 2021
Freeze Watch 3, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Mar 16, 2021, 9:08 AM PDT for Lake County, Mendocino County, California. It took effect at Mar 17, 2021, 12:00 AM PDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Mar 16, 2021, 9:08 AM PDT (16:08 UTC)
- In effect from
- Mar 17, 2021, 12:00 AM PDT
- Expired
- Mar 16, 2021, 1:27 PM PDT
- In force
- Issued by
- NWS Eureka, CA
Counties Lake County, CA, Mendocino County, CA
The radar
The Beale AFB radar (KBBX), 128 km from the middle of the area, began a volume at 16:10 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, 4.1 hours before the alert went out and 188 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
- 1193 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
079 WWUS76 KEKA 161608 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 908 AM PDT Tue Mar 16 2021 CAZ110-111-114-170015- /O.EXP.KEKA.HZ.W.0002.000000T0000Z-210316T1600Z/ /O.NEW.KEKA.FZ.A.0003.210317T0700Z-210317T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 908 AM PDT Tue Mar 16 2021 ...FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY MORNING... ...HARD FREEZE WARNING HAS EXPIRED... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake counties. * WHEN...From late tonight through Wednesday 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. $$ CAZ101-103-109-112-113-115-161715- /O.EXP.KEKA.FZ.W.0010.000000T0000Z-210316T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 908 AM PDT Tue Mar 16 2021 ...FREEZE WARNING HAS EXPIRED... Widespread frost is likely again tonight. $$
1 follow-up statement
528 WWUS76 KEKA 162027 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 127 PM PDT Tue Mar 16 2021 CAZ110-111-114-171600- /O.UPG.KEKA.FZ.A.0003.210317T0700Z-210317T1600Z/ /O.NEW.KEKA.FZ.W.0011.210317T0700Z-210317T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake County- 127 PM PDT Tue Mar 16 2021 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior, and Northern Lake counties. * WHEN...From midnight tonight to 9 AM Wednesday. * 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. $$ CAZ101-103-109-112-113-115-171600- /O.NEW.KEKA.FR.Y.0011.210317T0700Z-210317T1600Z/ Coastal Del Norte-Northern Humboldt Coast-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- Southern Lake County- 127 PM PDT Tue Mar 16 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Mendocino Coast, Southwestern Mendocino Interior, Southeastern Mendocino Interior, and Southern Lake counties. * WHEN...From midnight tonight to 9 AM Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 15, 10:44 PM PDT | Small Craft Advisory | EKA | 20 hr | |
| Mar 16, 3:09 AM PDT | Gale Watch | EKA | 11 hr | |
| Mar 16, 1:27 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 20 hr |
| Mar 16, 1:27 PM PDT | Freeze Warning | EKA | Lake, Mendocino | 20 hr |
| Mar 16, 1:39 PM PDT | Winter Storm Watch | EKA | 14 hr | |
| Mar 16, 2:25 PM PDT | Gale Warning | EKA | 46 hr | |
| Mar 16, 2:25 PM PDT | Small Craft Advisory | EKA | 36 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.