Alert archive / California / Frost Advisories in 2021
Frost Advisory 10, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Mar 13, 2021, 12:36 PM PST for Mendocino County, California. It took effect at Mar 13, 2021, 11:00 PM PST. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Mar 13, 2021, 12:36 PM PST (20:36 UTC)
- In effect from
- Mar 13, 2021, 11:00 PM PST
- Expired
- Mar 14, 2021, 8:00 AM PDT
- In force
- 8 hr
- 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 20:39 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, 8.6 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 852 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
298 WWUS76 KEKA 132036 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1236 PM PST Sat Mar 13 2021 CAZ111-114-140445- /O.NEW.KEKA.FZ.W.0009.210314T0700Z-210314T1500Z/ Northeastern Mendocino Interior-Northern Lake County- 1236 PM PST Sat Mar 13 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM PST THIS EVENING TO 8 AM PDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Northeastern Mendocino Interior and Northern Lake County Counties. * WHEN...From 11 PM PST this evening to 8 AM PDT Sunday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. * ADDITIONAL DETAILS...Temperatures are expected to drop quickly this evening before leveling off later tonight as high clouds start to move into the area. 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. && $$ CAZ110-112-113-115-140445- /O.NEW.KEKA.FR.Y.0010.210314T0700Z-210314T1500Z/ Northwestern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake County- 1236 PM PST Sat Mar 13 2021 ...FROST ADVISORY IN EFFECT FROM 11 PM PST THIS EVENING TO 8 AM PDT SUNDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Northwestern Mendocino Interior, Southwestern Mendocino Interior, Southeastern Mendocino Interior and Southern Lake County Counties. * WHEN...From 11 PM PST this evening to 8 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. * ADDITIONAL DETAILS...Temperatures are expected to drop quickly this evening before leveling off later tonight as high clouds start to move into the area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
2 follow-up statements
093 WWUS76 KEKA 140214 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 614 PM PST Sat Mar 13 2021 CAZ111-114-141015- /O.CON.KEKA.FZ.W.0009.210314T0700Z-210314T1500Z/ Northeastern Mendocino Interior-Northern Lake County- 614 PM PST Sat Mar 13 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM PST THIS EVENING TO 8 AM PDT SUNDAY... * WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Northeastern Mendocino Interior and Northern Lake County Counties. * WHEN...From 11 PM PST this evening to 8 AM PDT Sunday. * 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. && $$ CAZ110-112-113-115-141015- /O.CON.KEKA.FR.Y.0010.210314T0700Z-210314T1500Z/ Northwestern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake County- 614 PM PST Sat Mar 13 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 11 PM PST THIS EVENING TO 8 AM PDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior and Southern Lake County Counties. * WHEN...From 11 PM PST this evening to 8 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
030 WWUS76 KEKA 141004 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 304 AM PDT Sun Mar 14 2021 CAZ111-114-141500- /O.CON.KEKA.FZ.W.0009.000000T0000Z-210314T1500Z/ Northeastern Mendocino Interior-Northern Lake County- 304 AM PDT Sun Mar 14 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 29. * WHERE...Northeastern Mendocino Interior and Northern Lake County. * WHEN...Until 8 AM PDT this morning. * 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. && $$ CAZ110-112-113-115-141500- /O.CON.KEKA.FR.Y.0010.000000T0000Z-210314T1500Z/ Northwestern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake County- 304 AM PDT Sun Mar 14 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... * WHAT...Temperatures as low as 35 will result in frost formation. * WHERE...Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northwestern Mendocino Interior and Southern Lake County. * WHEN...Until 8 AM PDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 5:07 PM PST | Gale Watch | EKA | 9 hr | |
| Mar 13, 2:35 AM PST | Gale Warning | EKA | 35 hr | |
| Mar 13, 2:35 AM PST | Small Craft Advisory | EKA | 43 hr | |
| Mar 13, 4:13 AM PST | Winter Weather Advisory | EKA | Del Norte, Humboldt, Lake, Mendocino, Trinity | 50 hr |
| Mar 13, 12:36 PM PST | Freeze Warning | EKA | Lake, Mendocino | 18 hr |
Nearby
Frost Advisories in California, 2021Every frost advisory 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.