Alert archive / California / Frost Advisories in 2021
Frost Advisory 40, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Jun 8, 2021, 12:09 PM PDT for Mendocino County, California. It took effect at Jun 9, 2021, 1:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jun 8, 2021, 12:09 PM PDT (19:09 UTC)
- In effect from
- Jun 9, 2021, 1:00 AM PDT
- Expired
- Jun 9, 2021, 9:00 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 19:12 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
Oakland, CA (KOAK), launched 12:00Z, 7.2 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 679 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -60 m²/s²
- 0-3 km storm-relative helicity
- 16 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
359 WWUS76 KEKA 081909 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1209 PM PDT Tue Jun 8 2021 CAZ106-108-114-090315- /O.NEW.KEKA.FZ.W.0018.210609T0800Z-210609T1600Z/ Southern Humboldt Interior-Southern Trinity-Northern Lake- 1209 PM PDT Tue Jun 8 2021 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM PDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 32 expected. * WHERE...Southern Humboldt Interior, Southern Trinity and Northern Lake Counties. * WHEN...From 1 AM to 9 AM PDT 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. Provide adequate shelter for outdoor pets or consider bringing them indoors. 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. && $$ CAZ107-111-090315- /O.NEW.KEKA.FR.Y.0040.210609T0800Z-210609T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 1209 PM PDT Tue Jun 8 2021 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northern Trinity and Northeastern Mendocino Interior Counties. * WHEN...From 1 AM to 9 AM PDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
5 follow-up statements
895 WWUS76 KEKA 082112 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 212 PM PDT Tue Jun 8 2021 CAZ106-108-114-090515- /O.CON.KEKA.FZ.W.0018.210609T0800Z-210609T1600Z/ Southern Humboldt Interior-Southern Trinity-Northern Lake- 212 PM PDT Tue Jun 8 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Southern Trinity, Northern Lake and Southern Humboldt Interior Counties. * WHEN...From 1 AM to 9 AM PDT 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. Provide adequate shelter for outdoor pets or consider bringing them indoors. 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. && $$ CAZ107-111-090515- /O.CON.KEKA.FR.Y.0040.210609T0800Z-210609T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 212 PM PDT Tue Jun 8 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northeastern Mendocino Interior and Northern Trinity Counties. * WHEN...From 1 AM to 9 AM PDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
967 WWUS76 KEKA 090509 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1009 PM PDT Tue Jun 8 2021 CAZ106-108-114-091315- /O.CON.KEKA.FZ.W.0018.210609T0800Z-210609T1600Z/ Southern Humboldt Interior-Southern Trinity-Northern Lake- 1009 PM PDT Tue Jun 8 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Southern Trinity, Northern Lake and Southern Humboldt Interior Counties. * WHEN...From 1 AM to 9 AM PDT 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. Provide adequate shelter for outdoor pets or consider bringing them indoors. 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. && $$ CAZ107-111-091315- /O.CON.KEKA.FR.Y.0040.210609T0800Z-210609T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 1009 PM PDT Tue Jun 8 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northeastern Mendocino Interior and Northern Trinity Counties. * WHEN...From 1 AM to 9 AM PDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
291 WWUS76 KEKA 090525 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1025 PM PDT Tue Jun 8 2021 CAZ106-108-114-091330- /O.CON.KEKA.FZ.W.0018.210609T0800Z-210609T1600Z/ Southern Humboldt Interior-Southern Trinity-Northern Lake- 1025 PM PDT Tue Jun 8 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Southern Trinity, Northern Lake and Southern Humboldt Interior Counties. * WHEN...From 1 AM to 9 AM PDT 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. Provide adequate shelter for outdoor pets or consider bringing them indoors. 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. && $$ CAZ110-091330- /O.EXA.KEKA.FR.Y.0040.210609T0800Z-210609T1600Z/ Northwestern Mendocino Interior- 1025 PM PDT Tue Jun 8 2021 ...FROST ADVISORY IN EFFECT UNTIL 9 AM PDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northwestern Mendocino Interior County. * WHEN...From 1 AM to 9 AM PDT Wednesday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ107-111-091330- /O.CON.KEKA.FR.Y.0040.210609T0800Z-210609T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 1025 PM PDT Tue Jun 8 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT WEDNESDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Northeastern Mendocino Interior and Northern Trinity Counties. * WHEN...From 1 AM to 9 AM PDT Wednesday. * 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. && $$
076 WWUS76 KEKA 091056 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 356 AM PDT Wed Jun 9 2021 CAZ106-108-114-091600- /O.CON.KEKA.FZ.W.0018.000000T0000Z-210609T1600Z/ Southern Humboldt Interior-Southern Trinity-Northern Lake- 356 AM PDT Wed Jun 9 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 31. * WHERE...Southern Trinity, Southern Humboldt Interior and Northern Lake Counties. * WHEN...Until 9 AM PDT this morning. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ107-110-111-091600- /O.CON.KEKA.FR.Y.0040.000000T0000Z-210609T1600Z/ Northern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 356 AM PDT Wed Jun 9 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * WHAT...Temperatures as low as 36 will result in frost formation. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Trinity Counties. * 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. && $$
259 WWUS76 KEKA 091532 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 832 AM PDT Wed Jun 9 2021 CAZ106-108-114-091645- /O.EXP.KEKA.FZ.W.0018.000000T0000Z-210609T1600Z/ Southern Humboldt Interior-Southern Trinity-Northern Lake- 832 AM PDT Wed Jun 9 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... $$ CAZ107-110-111-091645- /O.EXP.KEKA.FR.Y.0040.000000T0000Z-210609T1600Z/ Northern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 832 AM PDT Wed Jun 9 2021 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 12:09 PM PDT | Freeze Warning | EKA | Humboldt, Lake, Trinity | 21 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.