Alert archive / California / Frost Advisories in 2017
Frost Advisory 22, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Oct 11, 2017, 2:35 AM PDT for Mendocino County, Trinity County, California. It took effect at Oct 12, 2017, 12:00 AM PDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Oct 11, 2017, 2:35 AM PDT (09:35 UTC)
- In effect from
- Oct 12, 2017, 12:00 AM PDT
- Expired
- Oct 11, 2017, 3:35 PM PDT
- In force
- 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 09:37 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 00:00Z, 9.6 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
- 2701 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 182 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
316 WWUS76 KEKA 110935 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 235 AM PDT Wed Oct 11 2017 CAZ107-108-110-111-112245- /O.NEW.KEKA.FR.Y.0022.171012T0700Z-171012T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 235 AM 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. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth...Leggett...Laytonville...Willits... Covelo.... * Temperatures...lows will drop to 33 to 36 degrees tonight in the valleys. Local cold spots in Trinity county may see temperatures drop into the upper 20s. * 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. && $$
1 follow-up statement
318 WWUS76 KEKA 112235 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 335 PM PDT Wed Oct 11 2017 CAZ107-108-110-111-121145- /O.UPG.KEKA.FR.Y.0022.171012T0700Z-171012T1600Z/ /O.NEW.KEKA.FZ.W.0007.171012T0700Z-171012T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 335 PM PDT Wed Oct 11 2017 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from midnight tonight to 9 AM PDT Thursday. The Frost Advisory is no longer in effect. * LOW TEMPERATURES...Upper 20s to lower 30s. * LOCATIONS INCLUDE...Hayfork...Ruth...Weaverville...Douglas City...Trinity Center...Leggett...Laytonville...Willits... Covelo...Potter Valley. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ 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. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 11, 3:35 PM PDT | Frost Advisory | EKA | Del Norte, Humboldt, Mendocino | 18 hr |
| Oct 11, 3:35 PM PDT | Freeze Warning | EKA | Mendocino, Trinity | 18 hr |
| Oct 11, 4:07 PM PDT | Fire Weather Watch | EKA | 30 hr |
Nearby
Frost Advisories in California, 2017Every frost advisory 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.