Alert archive / California / Frost Advisories in 2017
Frost Advisory 20, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Oct 4, 2017, 2:46 PM PDT for Humboldt County, Mendocino County, California. It took effect at Oct 5, 2017, 12:00 AM PDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Oct 4, 2017, 2:46 PM PDT (21:46 UTC)
- In effect from
- Oct 5, 2017, 12:00 AM PDT
- Expired
- Oct 5, 2017, 9:00 AM PDT
- In force
- 9 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 21:48 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, 9.8 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
- 1908 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
142 WWUS76 KEKA 042146 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 246 PM PDT Wed Oct 4 2017 CAZ107-108-110-051100- /O.NEW.KEKA.FZ.W.0006.171005T0700Z-171005T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- 246 PM PDT Wed Oct 4 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. * LOW TEMPERATURES...upper 20s to low 30s. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth...Leggett...Laytonville...Willits. * 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. && $$ CAZ104>106-109-111>113-051100- /O.NEW.KEKA.FR.Y.0020.171005T0700Z-171005T1600Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Northeastern Mendocino Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior- 246 PM PDT Wed Oct 4 2017 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from midnight tonight to 9 AM PDT Thursday. * LOW TEMPERATURES...low to mid 30s. * LOCATIONS INCLUDE...Petrolia...Honeydew...Ettersberg... Orleans...Willow Creek...Garberville...Bridgeville...Fort Bragg...Point Arena...Covelo...Boonville...Comptche...Ukiah... Hopland...Blue Lake. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$
4 follow-up statements
577 WWUS76 KEKA 042157 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 257 PM PDT Wed Oct 4 2017 CAZ111-051100- /O.UPG.KEKA.FR.Y.0020.171005T0700Z-171005T1600Z/ /O.EXA.KEKA.FZ.W.0006.171005T0700Z-171005T1600Z/ Northeastern Mendocino Interior- 257 PM PDT Wed Oct 4 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...mid 20s to low 30s. * LOCATIONS INCLUDE...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. && $$ CAZ107-108-110-051100- /O.CON.KEKA.FZ.W.0006.171005T0700Z-171005T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- 257 PM PDT Wed Oct 4 2017 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... * LOW TEMPERATURES...upper 20s to low 30s. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth...Leggett...Laytonville...Willits. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ104>106-109-112-113-051100- /O.CON.KEKA.FR.Y.0020.171005T0700Z-171005T1600Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 257 PM PDT Wed Oct 4 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... * LOW TEMPERATURES...low to mid 30s. * LOCATIONS INCLUDE...Fort Bragg...Point Arena...Boonville... Comptche...Ukiah...Hopland...Orleans...Willow Creek...BLue Lake...Petrolia...Honeydew...Ettersberg...Garberville...Bridgeville. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
144 WWUS76 KEKA 050344 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 844 PM PDT Wed Oct 4 2017 CAZ109-050445- /O.CAN.KEKA.FR.Y.0020.171005T0700Z-171005T1600Z/ Mendocino Coast- 844 PM PDT Wed Oct 4 2017 ...FROST ADVISORY IS CANCELLED... The National Weather Service in Eureka has cancelled the Frost Advisory. $$ CAZ107-108-110-111-051600- /O.CON.KEKA.FZ.W.0006.171005T0700Z-171005T1600Z/ Northern Trinity-Southern Trinity-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 844 PM PDT Wed Oct 4 2017 ...FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... * LOW TEMPERATURES...upper 20S to mid 30s. * LOCATIONS INCLUDE...Hayfork...Ruth...Leggett...Laytonville... Willits...Covelo...Weaverville...Burnt ...Ranch...Trinity Center. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ104>106-112-113-051600- /O.CON.KEKA.FR.Y.0020.171005T0700Z-171005T1600Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Southwestern Mendocino Interior- Southeastern Mendocino Interior- 844 PM PDT Wed Oct 4 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM PDT THURSDAY... * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Boonville...Comptche...Ukiah...Hopland... Orleans...Willow Creek...Petrolia...Honeydew...Ettersberg... Garberville...Bridgeville. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
294 WWUS76 KEKA 051018 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 318 AM PDT Thu Oct 5 2017 CAZ110-111-051600- /O.CAN.KEKA.FZ.W.0006.000000T0000Z-171005T1600Z/ /O.EXA.KEKA.FR.Y.0020.000000T0000Z-171005T1600Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 318 AM PDT Thu Oct 5 2017 ...FROST ADVISORY IN EFFECT UNTIL 9 AM PDT THIS MORNING... ...FREEZE WARNING IS CANCELLED... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect until 9 AM PDT this morning. the Freeze Warning has been canceled. * LOW TEMPERATURES...Low to mid 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 Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$ CAZ112-113-051130- /O.CAN.KEKA.FR.Y.0020.000000T0000Z-171005T1600Z/ Southwestern Mendocino Interior-Southeastern Mendocino Interior- 318 AM PDT Thu Oct 5 2017 ...FROST ADVISORY IS CANCELLED... The National Weather Service in Eureka has cancelled the Frost Advisory. $$ CAZ107-108-051600- /O.CON.KEKA.FZ.W.0006.000000T0000Z-171005T1600Z/ Northern Trinity-Southern Trinity- 318 AM PDT Thu Oct 5 2017 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOW TEMPERATURES...Upper 20S to mid 30s. * LOCATIONS INCLUDE...Hayfork...Ruth for most likely freeze. Most other areas slightly warmer but frost still possible. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ104>106-051600- /O.CON.KEKA.FR.Y.0020.000000T0000Z-171005T1600Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior- 318 AM PDT Thu Oct 5 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT THIS MORNING... * LOCATIONS INCLUDE...Willow Creek...Honeydew...Garberville...Redway. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
079 WWUS76 KEKA 051554 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 854 AM PDT Thu Oct 5 2017 CAZ107-108-051700- /O.EXP.KEKA.FZ.W.0006.000000T0000Z-171005T1600Z/ Northern Trinity-Southern Trinity- 854 AM PDT Thu Oct 5 2017 ...FREEZE WARNING WILL EXPIRE AT 9 AM PDT THIS MORNING... This will be the final statement issued for this event. $$ CAZ104>106-110-111-051700- /O.EXP.KEKA.FR.Y.0020.000000T0000Z-171005T1600Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Northwestern Mendocino Interior- Northeastern Mendocino Interior- 854 AM PDT Thu Oct 5 2017 ...FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING... This will be the final statement issued for this event. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 4, 12:24 AM PDT | Frost Advisory | EKA | Trinity | 9 hr |
| Oct 4, 2:46 PM PDT | Freeze Warning | EKA | Mendocino, Trinity | 18 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.