Alert archive / California / Freeze Warnings in 2021
Freeze Warning 25, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Dec 10, 2021, 2:59 PM PST for Humboldt County, Lake County, Mendocino County, California. It took effect at Dec 10, 2021, 11:00 PM PST. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 10, 2021, 2:59 PM PST (22:59 UTC)
- In effect from
- Dec 10, 2021, 11:00 PM PST
- Expired
- Dec 11, 2021, 9:00 AM PST
- In force
- 10 hr
- 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 23:03 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, 11.0 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
- 1499 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
700 WWUS76 KEKA 102259 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 259 PM PST Fri Dec 10 2021 CAZ104-106-110700- /O.NEW.KEKA.FZ.W.0025.211211T0700Z-211211T1700Z/ /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Southwestern Humboldt-Southern Humboldt Interior- 259 PM PST Fri Dec 10 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM PST SATURDAY... ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 10 PM PST SATURDAY ABOVE 1500 FEET... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 30 expected. For the Wind Advisory above 1500 feet, south winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Southwestern Humboldt and Southern Humboldt Interior Counties. * WHEN...For the Freeze Warning, from 11 PM this evening to 9 AM PST Saturday. For the Wind Advisory, from 9 AM to 10 PM PST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. 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. && $$ CAZ109-112>115-110700- /O.NEW.KEKA.FZ.W.0025.211211T0700Z-211211T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Northern Lake-Southern Lake- 259 PM PST Fri Dec 10 2021 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 9 AM PST SATURDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Mendocino Coast, Southwestern Mendocino Interior, Southeastern Mendocino Interior, Northern Lake and Southern Lake Counties. * WHEN...From 11 PM this evening to 9 AM PST Saturday. * IMPACTS...Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ101-110700- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Coastal Del Norte- 259 PM PST Fri Dec 10 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 10 PM PST SATURDAY... * WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Coastal Del Norte County. * WHEN...From 9 AM to 10 PM PST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ102-105-110700- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Del Norte Interior-Northern Humboldt Interior- 259 PM PST Fri Dec 10 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 10 PM PST SATURDAY ABOVE 1500 FEET... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected above 1500 feet. * WHERE...Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...From 9 AM to 10 PM PST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
3 follow-up statements
607 WWUS76 KEKA 110419 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 819 PM PST Fri Dec 10 2021 CAZ114-110530- /O.CAN.KEKA.FZ.W.0025.211211T0700Z-211211T1700Z/ Northern Lake- 819 PM PST Fri Dec 10 2021 ...FREEZE WARNING IS CANCELLED... $$ CAZ104-106-111230- /O.CON.KEKA.FZ.W.0025.211211T0700Z-211211T1700Z/ /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Southwestern Humboldt-Southern Humboldt Interior- 819 PM PST Fri Dec 10 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST SATURDAY... ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 10 PM PST SATURDAY ABOVE 1500 FEET... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 29 expected. For the Wind Advisory above 1500 feet, south winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Southwestern Humboldt and Southern Humboldt Interior Counties. * WHEN...For the Freeze Warning, until 9 AM PST Saturday. For the Wind Advisory, from 9 AM to 10 PM PST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ109-112-113-115-111230- /O.CON.KEKA.FZ.W.0025.211211T0700Z-211211T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake- 819 PM PST Fri Dec 10 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST SATURDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Mendocino Coast, Southeastern Mendocino Interior, Southwestern Mendocino Interior and Southern Lake Counties. * WHEN...Until 9 AM PST Saturday. * 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. && $$ CAZ101-111230- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Coastal Del Norte- 819 PM PST Fri Dec 10 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 10 PM PST SATURDAY... * WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Coastal Del Norte County. * WHEN...From 9 AM to 10 PM PST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ102-105-111230- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Del Norte Interior-Northern Humboldt Interior- 819 PM PST Fri Dec 10 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM TO 10 PM PST SATURDAY ABOVE 1500 FEET... * WHAT...South winds 25 to 35 mph with gusts up to 50 mph expected above 1500 feet. * WHERE...Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...From 9 AM to 10 PM PST Saturday. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
506 WWUS76 KEKA 111147 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 347 AM PST Sat Dec 11 2021 CAZ104-106-112000- /O.CON.KEKA.FZ.W.0025.000000T0000Z-211211T1700Z/ /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Southwestern Humboldt-Southern Humboldt Interior- 347 AM PST Sat Dec 11 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 10 PM PST THIS EVENING ABOVE 1500 FEET... * WHAT...For the Freeze Warning, sub-freezing temperatures in the upper 20s and low 30s. For the Wind Advisory above 1500 feet, south winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Ridgetops and exposed areas above 1500 feet elevation in Southwestern Humboldt and Southern Humboldt Interior Counties. * WHEN...For the Freeze Warning, until 9 AM PST this morning. For the Wind Advisory, from 9 AM this morning to 10 PM PST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Frost and freeze conditions will kill crops and other sensitive vegetation. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. Take steps now to protect tender plants from the cold. Provide adequate shelter for outdoor pets or consider bringing them indoors. Frost Advisories and Freeze Warnings are issued during the local growing season as defined by climatology and local agriculture experts. Once the growing season has ended these statements will no longer be issued until the spring. && $$ CAZ109-112-113-115-111700- /O.CON.KEKA.FZ.W.0025.000000T0000Z-211211T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake- 347 AM PST Sat Dec 11 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... * WHAT...Sub-freezing temperatures in the upper 20s and low 30s. * WHERE...Mendocino Coast, Southeastern Mendocino Interior, Southwestern Mendocino Interior and Southern Lake Counties. * WHEN...Until 9 AM PST 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. && $$ CAZ101-112000- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Coastal Del Norte- 347 AM PST Sat Dec 11 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 10 PM PST THIS EVENING... * WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Coastal Del Norte County. * WHEN...From 9 AM this morning to 10 PM PST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ102-105-112000- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Del Norte Interior-Northern Humboldt Interior- 347 AM PST Sat Dec 11 2021 ...WIND ADVISORY REMAINS IN EFFECT FROM 9 AM THIS MORNING TO 10 PM PST THIS EVENING ABOVE 1500 FEET... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected above 1500 feet. * WHERE...Ridgetops and exposed areas above 1500 feet elevation in the Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...From 9 AM this morning to 10 PM PST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
625 WWUS76 KEKA 111648 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 848 AM PST Sat Dec 11 2021 CAZ104-106-120100- /O.EXP.KEKA.FZ.W.0025.000000T0000Z-211211T1700Z/ /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Southwestern Humboldt-Southern Humboldt Interior- 848 AM PST Sat Dec 11 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING ABOVE 1500 FEET... ...FREEZE WARNING WILL EXPIRE AT 9 AM PST THIS MORNING... * WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected above 1500 feet. * WHERE...Southwestern Humboldt and Southern Humboldt Interior Counties. * WHEN...Until 10 PM PST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ109-112-113-115-111800- /O.EXP.KEKA.FZ.W.0025.000000T0000Z-211211T1700Z/ Mendocino Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior-Southern Lake- 848 AM PST Sat Dec 11 2021 ...FREEZE WARNING WILL EXPIRE AT 9 AM PST THIS MORNING... $$ CAZ101-120100- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Coastal Del Norte- 848 AM PST Sat Dec 11 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING... * WHAT...South winds 20 to 30 mph with gusts up to 50 mph expected. * WHERE...Coastal Del Norte County. * WHEN...Until 10 PM PST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$ CAZ102-105-120100- /O.CON.KEKA.WI.Y.0019.211211T1700Z-211212T0600Z/ Del Norte Interior-Northern Humboldt Interior- 848 AM PST Sat Dec 11 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 10 PM PST THIS EVENING ABOVE 1500 FEET... * WHAT...South winds 25 to 35 mph with gusts up to 55 mph expected above 1500 feet. * WHERE...Del Norte Interior and Northern Humboldt Interior Counties. * WHEN...Until 10 PM PST this evening. * IMPACTS...Gusty winds could blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use extra caution when driving, especially if operating a high profile vehicle. Secure outdoor objects. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 9, 5:31 PM PST | Wind Advisory | EKA | Del Norte, Humboldt | 52 hr |
| Dec 10, 3:03 AM PST | Gale Warning | EKA | 46 hr | |
| Dec 10, 3:03 AM PST | Small Craft Advisory | EKA | 36 hr | |
| Dec 10, 1:54 PM PST | Winter Storm Warning | EKA | Trinity | 39 hr |
| Dec 10, 3:00 PM PST | Gale Watch | EKA | 4 hr |
Nearby
Freeze Warnings in California, 2021Every freeze warning 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.