Alert archive / California / Freeze Watches in 2021
Freeze Watch 9, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Nov 5, 2021, 2:54 AM PDT for Humboldt County, Lake County, Mendocino County, California. It took effect at Nov 7, 2021, 2:00 AM PST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 5, 2021, 2:54 AM PDT (09:54 UTC)
- In effect from
- Nov 7, 2021, 2:00 AM PST
- Expired
- Nov 6, 2021, 3:28 AM PDT
- In force
- Issued by
- NWS Eureka, CA
Counties Humboldt County, CA, Lake County, CA, Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 115 km from the middle of the area, began a volume at 09:54 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 00:00Z, 9.9 hours before the alert went out and 246 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
- 1031 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- -8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
090 WWUS76 KEKA 050954 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 254 AM PDT Fri Nov 5 2021 CAZ110-111-114-051800- /O.NEW.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 254 AM PDT Fri Nov 5 2021 ...FREEZE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING BELOW 3000 FEET... * WHAT...Sub-freezing temperatures possible below 3000 feet. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Low overnight temperatures are possible early Monday morning for clear valleys. 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. && $$
5 follow-up statements
266 WWUS76 KEKA 050956 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 256 AM PDT Fri Nov 5 2021 CAZ110-111-114-052200- /O.CON.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 256 AM PDT Fri Nov 5 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING BELOW 3000 FEET... * WHAT...Sub-freezing temperatures None possible below 3000 feet. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Low overnight temperatures are possible early Sunday morning for clear valleys. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
403 WWUS76 KEKA 051948 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1248 PM PDT Fri Nov 5 2021 CAZ110-111-114-060400- /O.CON.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 1248 PM PDT Fri Nov 5 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING BELOW 3000 FEET... * WHAT...Sub-freezing temperatures None possible below 3000 feet. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could 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. && $$
756 WWUS76 KEKA 052217 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 317 PM PDT Fri Nov 5 2021 CAZ106-060630- /O.EXA.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ Southern Humboldt Interior- 317 PM PDT Fri Nov 5 2021 ...FREEZE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING... * WHAT...Sub-freezing temperatures as low as 31 possible. * WHERE...Southern Humboldt Interior County. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ110-111-114-060630- /O.CON.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- Northern Lake- 317 PM PDT Fri Nov 5 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could 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. && $$
549 WWUS76 KEKA 060428 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 928 PM PDT Fri Nov 5 2021 CAZ106-110-111-114-061230- /O.CON.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ Southern Humboldt Interior-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 928 PM PDT Fri Nov 5 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY MORNING... * WHAT...Sub-freezing temperatures as low as 29 possible. * WHERE...Northwestern Mendocino Interior, Northeastern Mendocino Interior, Northern Lake and Southern Humboldt Interior Counties. * WHEN...From late Saturday night through Sunday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
922 WWUS76 KEKA 061028 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 328 AM PDT Sat Nov 6 2021 CAZ106-110-111-114-061830- /O.UPG.KEKA.FZ.A.0009.211107T1000Z-211107T1600Z/ /O.NEW.KEKA.FR.Y.0048.211107T1000Z-211107T1600Z/ /O.NEW.KEKA.FZ.A.0010.211108T1000Z-211108T1600Z/ Southern Humboldt Interior-Northwestern Mendocino Interior- Northeastern Mendocino Interior-Northern Lake- 328 AM PDT Sat Nov 6 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM PST SUNDAY BELOW 3000 FEET... ...FREEZE WATCH IN EFFECT FROM LATE SUNDAY NIGHT THROUGH MONDAY MORNING BELOW 3000 FEET... * WHAT...For the Frost Advisory below 3000 feet, temperatures None will result in frost formation. For the Freeze Watch below 3000 feet, sub-freezing temperatures None possible. * WHERE...Southern Humboldt Interior, Northwestern Mendocino Interior, Northeastern Mendocino Interior and Northern Lake Counties. * WHEN...For the Frost Advisory, from 2 AM to 8 AM PST Sunday. For the Freeze Watch, from late Sunday night through Monday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. * ADDITIONAL DETAILS...Valley fog could help protect some areas from freezing temperatures, particularly on Sunday. 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. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 4, 8:36 PM PDT | Small Craft Advisory | EKA | 12 hr | |
| Nov 5, 9:02 AM PDT | Small Craft Advisory | EKA | 41 hr | |
| Nov 5, 2:30 PM PDT | Coastal Flood Advisory | EKA | Humboldt | 24 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.