Alert archive / California / Freeze Watches in 2021
Freeze Watch 7, NWS Eureka, CA
NWS Eureka, CA issued this freeze watch at Oct 10, 2021, 2:55 PM PDT for Humboldt County, Mendocino County, Trinity County, California. It took effect at Oct 12, 2021, 2:00 AM PDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Oct 10, 2021, 2:55 PM PDT (21:55 UTC)
- In effect from
- Oct 12, 2021, 2:00 AM PDT
- Expired
- Oct 11, 2021, 2:11 PM PDT
- In force
- Issued by
- NWS Eureka, CA
Counties Humboldt County, CA, Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 73 km from the middle of the area, began a volume at 21:57 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, 9.9 hours before the alert went out and 241 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
- 1058 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
021 WWUS76 KEKA 102155 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 255 PM PDT Sun Oct 10 2021 CAZ106-108-110600- /O.NEW.KEKA.FR.Y.0045.211011T0900Z-211011T1600Z/ /O.NEW.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Southern Humboldt Interior-Southern Trinity- 255 PM PDT Sun Oct 10 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY... ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...For the Frost Advisory, temperatures as low as 32 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 27 possible. * WHERE...Southern Humboldt Interior and Southern Trinity Counties. * WHEN...For the Frost Advisory, from 2 AM to 9 AM PDT Monday. For the Freeze Watch, from late Monday night through Tuesday 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. && $$ CAZ107-111-110600- /O.NEW.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 255 PM PDT Sun Oct 10 2021 ...FREEZE WATCH IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 23 possible. * WHERE...Northern Trinity and Northeastern Mendocino Interior Counties. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
5 follow-up statements
110 WWUS76 KEKA 110447 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 947 PM PDT Sun Oct 10 2021 CAZ106-108-111300- /O.CON.KEKA.FR.Y.0045.211011T0900Z-211011T1600Z/ /O.CON.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Southern Humboldt Interior-Southern Trinity- 947 PM PDT Sun Oct 10 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT MONDAY... ...FREEZE WATCH REMAINS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...For the Frost Advisory, temperatures as low as 32 will result in frost formation. For the Freeze Watch, sub-freezing temperatures as low as 27 possible. * WHERE...Southern Trinity and Southern Humboldt Interior Counties. * WHEN...For the Frost Advisory, from 2 AM to 9 AM PDT Monday. For the Freeze Watch, from late Monday night through Tuesday 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. && $$ CAZ107-111-111300- /O.CON.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 947 PM PDT Sun Oct 10 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE MONDAY NIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 23 possible. * WHERE...Northeastern Mendocino Interior and Northern Trinity Counties. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
021 WWUS76 KEKA 111045 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 345 AM PDT Mon Oct 11 2021 CAZ106-108-112230- /O.CAN.KEKA.FR.Y.0045.000000T0000Z-211011T1600Z/ /O.CON.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Southern Humboldt Interior-Southern Trinity- 345 AM PDT Mon Oct 11 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... ...FROST ADVISORY IS CANCELLED... * WHAT...Sub-freezing temperatures as low as 27 possible. * WHERE...Southern Trinity and Southern Humboldt Interior Counties. * WHEN...From late tonight through Tuesday 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. && $$ CAZ107-111-112230- /O.CON.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Northern Trinity-Northeastern Mendocino Interior- 345 AM PDT Mon Oct 11 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 23 possible. * WHERE...Northeastern Mendocino Interior and Northern Trinity Counties. * WHEN...From late tonight through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
191 WWUS76 KEKA 111128 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 428 AM PDT Mon Oct 11 2021 CAZ106>108-111-111930- /O.CON.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- Northeastern Mendocino Interior- 428 AM PDT Mon Oct 11 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 24 possible. * WHERE...Southern Trinity, Northeastern Mendocino Interior, Northern Trinity and Southern Humboldt Interior Counties. * WHEN...From late tonight through Tuesday 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. && $$
251 WWUS76 KEKA 111458 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 758 AM PDT Mon Oct 11 2021 CAZ106>108-112300- /O.CAN.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ /O.NEW.KEKA.HZ.A.0003.211012T0900Z-211012T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- 758 AM PDT Mon Oct 11 2021 ...HARD FREEZE WATCH IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 23 possible. * WHERE...Southern Humboldt Interior, Northern Trinity and Southern Trinity Counties. * WHEN...From late tonight through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ111-112300- /O.CON.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ Northeastern Mendocino Interior- 758 AM PDT Mon Oct 11 2021 ...FREEZE WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING... * WHAT...Sub-freezing temperatures as low as 31 possible. * WHERE...Northeastern Mendocino Interior County. * WHEN...From late tonight through Tuesday 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. && $$
041 WWUS76 KEKA 112111 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 211 PM PDT Mon Oct 11 2021 CAZ106>108-120515- /O.UPG.KEKA.HZ.A.0003.211012T0900Z-211012T1600Z/ /O.NEW.KEKA.HZ.W.0004.211012T0900Z-211012T1600Z/ Southern Humboldt Interior-Northern Trinity-Southern Trinity- 211 PM PDT Mon Oct 11 2021 ...HARD FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 23 expected. * WHERE...Southern Humboldt Interior, Northern Trinity and Southern Trinity Counties. * WHEN...From 2 AM to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ111-120515- /O.UPG.KEKA.FZ.A.0007.211012T0900Z-211012T1600Z/ /O.NEW.KEKA.FZ.W.0020.211012T0900Z-211012T1600Z/ Northeastern Mendocino Interior- 211 PM PDT Mon Oct 11 2021 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Northeastern Mendocino Interior County. * WHEN...From 2 AM to 9 AM PDT Tuesday. * 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. && $$ CAZ102-105-110-114-120515- /O.NEW.KEKA.FZ.W.0020.211012T0900Z-211012T1600Z/ Del Norte Interior-Northern Humboldt Interior- Northwestern Mendocino Interior-Northern Lake- 211 PM PDT Mon Oct 11 2021 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM PDT TUESDAY... * WHAT...Sub-freezing temperatures as low as 31 expected. * WHERE...Del Norte Interior, Northern Humboldt Interior, Northwestern Mendocino Interior and Northern Lake Counties. * WHEN...From 2 AM to 9 AM PDT Tuesday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 2:30 AM PDT | Gale Warning | EKA | 43 hr | |
| Oct 10, 3:19 AM PDT | Red Flag Warning | EKA | 64 hr | |
| Oct 10, 2:55 PM PDT | Frost Advisory | EKA | Humboldt, Trinity | 13 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.