Alert archive / California / Frost Advisories in 2018
Frost Advisory 4, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Mar 17, 2018, 2:10 PM PDT for Humboldt County, Mendocino County, California. It took effect at Mar 18, 2018, 1:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Mar 17, 2018, 2:10 PM PDT (21:10 UTC)
- In effect from
- Mar 18, 2018, 1:00 AM PDT
- Expired
- Mar 18, 2018, 9:00 AM PDT
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
Counties Humboldt County, CA, Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 71 km from the middle of the area, began a volume at 21:12 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, 9.2 hours before the alert went out and 266 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
- 571 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
109 WWUS76 KEKA 172110 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 210 PM PDT Sat Mar 17 2018 CAZ110-111-181015- /O.NEW.KEKA.FZ.W.0002.180318T0800Z-180318T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 210 PM PDT Sat Mar 17 2018 ...FREEZE WARNING IN EFFECT FROM 1 AM TO 9 AM PDT SUNDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from 1 AM to 9 AM PDT Sunday. * LOW TEMPERATURES...lower 30s. * LOCATIONS INCLUDE...Leggett...Laytonville...Willits...Covelo. * 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. && $$ CAZ103-112-113-181015- /O.NEW.KEKA.FR.Y.0004.180318T0800Z-180318T1600Z/ Northern Humboldt Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior- 210 PM PDT Sat Mar 17 2018 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PDT SUNDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 9 AM PDT Sunday. * LOW TEMPERATURES...lower to mid 30s. * LOCATIONS INCLUDE...Arcata...Eureka...Fortuna...Boonville... Comptche...Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
2 follow-up statements
278 WWUS76 KEKA 180623 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1123 PM PDT Sat Mar 17 2018 CAZ110-111-181600- /O.CON.KEKA.FZ.W.0002.180318T0800Z-180318T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 1123 PM PDT Sat Mar 17 2018 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT SUNDAY... * LOW TEMPERATURES...upper 20S to lower 30S. * LOCATIONS INCLUDE...Covelo...Leggett...Laytonville...Willits. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ109-181600- /O.EXA.KEKA.FR.Y.0004.180318T0800Z-180318T1600Z/ Mendocino Coast- 1123 PM PDT Sat Mar 17 2018 ...FROST ADVISORY IN EFFECT UNTIL 9 AM PDT SUNDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect until 9 AM PDT Sunday. * LOW TEMPERATURES...low 30s to mid 30s. * LOCATIONS INCLUDE...Fort Bragg...Point Arena. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ103-112-113-181600- /O.CON.KEKA.FR.Y.0004.180318T0800Z-180318T1600Z/ Northern Humboldt Coast-Southwestern Mendocino Interior- Southeastern Mendocino Interior- 1123 PM PDT Sat Mar 17 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT SUNDAY... * LOW TEMPERATURES...low 30s to mid 30s. * LOCATIONS INCLUDE...Boonville...Comptche...Ukiah...Hopland... Arcata...Eureka...Fortuna. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
663 WWUS76 KEKA 181552 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 852 AM PDT Sun Mar 18 2018 CAZ110-111-181700- /O.EXP.KEKA.FZ.W.0002.000000T0000Z-180318T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 852 AM PDT Sun Mar 18 2018 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... This will be the final statement issued for this event. $$ CAZ103-109-112-113-181700- /O.EXP.KEKA.FR.Y.0004.000000T0000Z-180318T1600Z/ Northern Humboldt Coast-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 852 AM PDT Sun Mar 18 2018 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... This will be the final statement issued for this event. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 2:10 PM PDT | Freeze Warning | EKA | Mendocino | 19 hr |
Nearby
Frost Advisories in California, 2018Every frost advisory in 2018
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.