Alert archive / California / Freeze Warnings in 2017
Freeze Warning 7, NWS Eureka, CA
NWS Eureka, CA issued this freeze warning at Oct 11, 2017, 3:35 PM PDT for Mendocino County, Trinity County, California. It took effect at Oct 12, 2017, 12:00 AM PDT. 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
- Oct 11, 2017, 3:35 PM PDT (22:35 UTC)
- In effect from
- Oct 12, 2017, 12:00 AM PDT
- Expired
- Oct 12, 2017, 10:00 AM PDT
- In force
- 10 hr
- Issued by
- NWS Eureka, CA
Counties Mendocino County, CA, Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 100 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 262 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
- 1140 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
318 WWUS76 KEKA 112235 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 335 PM PDT Wed Oct 11 2017 CAZ107-108-110-111-121145- /O.UPG.KEKA.FR.Y.0022.171012T0700Z-171012T1600Z/ /O.NEW.KEKA.FZ.W.0007.171012T0700Z-171012T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 335 PM PDT Wed Oct 11 2017 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from midnight tonight to 9 AM PDT Thursday. The Frost Advisory is no longer in effect. * LOW TEMPERATURES...Upper 20s to lower 30s. * LOCATIONS INCLUDE...Hayfork...Ruth...Weaverville...Douglas City...Trinity Center...Leggett...Laytonville...Willits... Covelo...Potter Valley. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ CAZ102-105-106-113-121145- /O.NEW.KEKA.FR.Y.0023.171012T0700Z-171012T1600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Southeastern Mendocino Interior- 335 PM PDT Wed Oct 11 2017 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from midnight tonight to 9 AM PDT Thursday. * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Orleans...Willow Creek... Garberville...Bridgeville...Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
3 follow-up statements
377 WWUS76 KEKA 120530 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1030 PM PDT Wed Oct 11 2017 CAZ107-108-110-111-121600- /O.CON.KEKA.FZ.W.0007.171012T0700Z-171012T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 1030 PM PDT Wed Oct 11 2017 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THURSDAY... * LOW TEMPERATURES...Upper 20s to lower 30s. * LOCATIONS INCLUDE...Hayfork...Ruth...Weaverville...Douglas City...Trinity Center...Leggett...Laytonville...Willits... Covelo...Potter Valley. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ102-105-106-113-121600- /O.CON.KEKA.FR.Y.0023.171012T0700Z-171012T1600Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Southeastern Mendocino Interior- 1030 PM PDT Wed Oct 11 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THURSDAY... * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Orleans...Willow Creek... Garberville...Bridgeville...Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
934 WWUS76 KEKA 121547 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 847 AM PDT Thu Oct 12 2017 CAZ107-108-110-111-121700- /O.EXT.KEKA.FZ.W.0007.000000T0000Z-171012T1700Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 847 AM PDT Thu Oct 12 2017 ...FREEZE WARNING NOW IN EFFECT UNTIL 10 AM PDT THIS MORNING... * LOW TEMPERATURES...Upper 20s to lower 30s. * LOCATIONS INCLUDE...Hayfork...Ruth...Weaverville...Douglas City...Trinity Center...Leggett...Laytonville...Willits... Covelo...Potter Valley. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ102-105-106-113-121700- /O.EXT.KEKA.FR.Y.0023.000000T0000Z-171012T1700Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Southeastern Mendocino Interior- 847 AM PDT Thu Oct 12 2017 ...FROST ADVISORY NOW IN EFFECT UNTIL 10 AM PDT THIS MORNING... * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Orleans...Willow Creek... Garberville...Bridgeville...Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
829 WWUS76 KEKA 121659 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 959 AM PDT Thu Oct 12 2017 CAZ107-108-110-111-121800- /O.EXP.KEKA.FZ.W.0007.000000T0000Z-171012T1700Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 959 AM PDT Thu Oct 12 2017 ...FREEZE WARNING WILL EXPIRE AT 10 AM PDT THIS MORNING... Temperatures have warmed above freezing in most locations, and will continue to warm through the afternoon. $$ CAZ102-105-106-113-121800- /O.EXP.KEKA.FR.Y.0023.000000T0000Z-171012T1700Z/ Del Norte Interior-Northern Humboldt Interior- Southern Humboldt Interior-Southeastern Mendocino Interior- 959 AM PDT Thu Oct 12 2017 ...FROST ADVISORY WILL EXPIRE AT 10 AM PDT THIS MORNING... Temperatures are warming throughout the area, and will continue to warm through the afternoon. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 2:35 AM PDT | Frost Advisory | EKA | Mendocino, Trinity | 13 hr |
| Oct 11, 3:35 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 18 hr |
| Oct 11, 4:07 PM PDT | Fire Weather Watch | EKA | 30 hr |
Nearby
Freeze Warnings in California, 2017Every freeze warning in 2017
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.