Alert archive / California / Frost Advisories in 2021
Frost Advisory 26, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Apr 10, 2021, 2:07 PM PDT for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Apr 11, 2021, 12:00 AM PDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 10, 2021, 2:07 PM PDT (21:07 UTC)
- In effect from
- Apr 11, 2021, 12:00 AM PDT
- Expired
- Apr 11, 2021, 9:00 AM PDT
- In force
- 9 hr
- 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 21:12 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 12:00Z, 9.1 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 752 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
459 WWUS76 KEKA 102107 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 207 PM PDT Sat Apr 10 2021 CAZ101>106-110-111-110515- /O.NEW.KEKA.FR.Y.0026.210411T0700Z-210411T1600Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 207 PM PDT Sat Apr 10 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM SUNDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Del Norte County, Humboldt County, Northwestern Mendocino Interior, and Northeastern Mendocino Interior. * WHEN...From midnight tonight to 9 AM Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. $$
3 follow-up statements
548 WWUS76 KEKA 110018 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 518 PM PDT Sat Apr 10 2021 CAZ109-112-110830- /O.EXA.KEKA.FR.Y.0026.210411T0700Z-210411T1600Z/ Mendocino Coast-Southwestern Mendocino Interior- 518 PM PDT Sat Apr 10 2021 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Mendocino Coast and Southwestern Mendocino Interior Counties. * WHEN...From midnight tonight to 9 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ101>106-110-111-110830- /O.CON.KEKA.FR.Y.0026.210411T0700Z-210411T1600Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 518 PM PDT Sat Apr 10 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Del Norte Interior, Coastal Del Norte, Northern Humboldt Coast, Northeastern Mendocino Interior, Northern Humboldt Interior, Southwestern Humboldt, Southern Humboldt Interior and Northwestern Mendocino Interior Counties. * WHEN...From midnight tonight to 9 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. && $$
279 WWUS76 KEKA 110554 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1054 PM PDT Sat Apr 10 2021 CAZ101>106-109>112-111400- /O.CON.KEKA.FR.Y.0026.210411T0700Z-210411T1600Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior- 1054 PM PDT Sat Apr 10 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT SUNDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of northwest California. * WHEN...Until 9 AM PDT Sunday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
512 WWUS76 KEKA 110851 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 151 AM PDT Sun Apr 11 2021 CAZ101>106-109>112-111600- /O.CON.KEKA.FR.Y.0026.000000T0000Z-210411T1600Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Northwestern Mendocino Interior-Northeastern Mendocino Interior- Southwestern Mendocino Interior- 151 AM PDT Sun Apr 11 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Portions of northwest California. * WHEN...Until 9 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. && $$
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.