Alert archive / California / Frost Advisories in 2018
Frost Advisory 10, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Apr 16, 2018, 3:15 AM PDT for Humboldt County, Mendocino County, California. It took effect at Apr 16, 2018, 11:00 PM PDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Apr 16, 2018, 3:15 AM PDT (10:15 UTC)
- In effect from
- Apr 16, 2018, 11:00 PM PDT
- Expired
- Apr 17, 2018, 10:00 AM PDT
- In force
- 11 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 10:17 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, 10.3 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
- 84 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 741 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
717 WWUS76 KEKA 161015 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 315 AM PDT Mon Apr 16 2018 CAZ102-161115- /O.CAN.KEKA.FZ.A.0002.180417T0600Z-180417T1700Z/ Del Norte Interior- 315 AM PDT Mon Apr 16 2018 ...FREEZE WATCH IS CANCELLED... The National Weather Service in Eureka has cancelled the Freeze Watch. Temperatures in most areas are not expected to drop below freezing. $$ CAZ107-108-162315- /O.UPG.KEKA.HZ.A.0003.180417T0600Z-180417T1700Z/ /O.NEW.KEKA.HZ.W.0003.180417T0600Z-180417T1700Z/ Northern Trinity-Southern Trinity- 315 AM PDT Mon Apr 16 2018 ...HARD FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... The National Weather Service in Eureka has issued a Hard Freeze Warning...which is in effect from 11 PM this evening to 10 AM PDT Tuesday. The Hard Freeze Watch is no longer in effect. * LOW TEMPERATURES...Mid to upper 20s. * LOCATIONS INCLUDE...Weaverville...Burnt Ranch...Trinity Center...Hayfork...Ruth. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Hard Freeze Warning means sub-freezing temperatures are imminent or highly likely. These conditions will kill crops and other sensitive vegetation. && $$ CAZ110-111-162315- /O.UPG.KEKA.FZ.A.0002.180417T0600Z-180417T1700Z/ /O.NEW.KEKA.FZ.W.0005.180417T0600Z-180417T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 315 AM PDT Mon Apr 16 2018 ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... The National Weather Service in Eureka has issued a Freeze Warning...which is in effect from 11 PM this evening to 10 AM PDT Tuesday. The Freeze Watch is no longer in effect. * LOW TEMPERATURES...Around 30. * 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. && $$ CAZ105-106-113-162315- /O.UPG.KEKA.FZ.A.0002.180417T0600Z-180417T1700Z/ /O.NEW.KEKA.FR.Y.0010.180417T0600Z-180417T1700Z/ Northern Humboldt Interior-Southern Humboldt Interior- Southeastern Mendocino Interior- 315 AM PDT Mon Apr 16 2018 ...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 11 PM this evening to 10 AM PDT Tuesday. The Freeze Watch is no longer in effect. * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Orleans...Willow Creek...Garberville... Bridgeville...Ukiah...Hopland. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$ CAZ104-109-112-162315- /O.NEW.KEKA.FR.Y.0010.180417T0600Z-180417T1700Z/ Southwestern Humboldt-Mendocino Coast- Southwestern Mendocino Interior- 315 AM PDT Mon Apr 16 2018 ...FROST ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 11 PM this evening to 10 AM PDT Tuesday. * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Petrolia...Honeydew...Ettersberg...Fort Bragg...Boonville...Comptche. * 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. && $$
3 follow-up statements
907 WWUS76 KEKA 162041 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 141 PM PDT Mon Apr 16 2018 CAZ107-108-170945- /O.CON.KEKA.HZ.W.0003.180417T0600Z-180417T1700Z/ Northern Trinity-Southern Trinity- 141 PM PDT Mon Apr 16 2018 ...HARD FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... * LOW TEMPERATURES...Mid to upper 20s. * LOCATIONS INCLUDE...Hayfork...Ruth...Weaverville...Burnt Ranch...Trinity Center. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ110-111-170945- /O.CON.KEKA.FZ.W.0005.180417T0600Z-180417T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 141 PM PDT Mon Apr 16 2018 ...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... * LOW TEMPERATURES...Upper 20s to lower 30s. * LOCATIONS INCLUDE...Leggett...Laytonville...Willits...Covelo. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ104>106-109-112-113-170945- /O.CON.KEKA.FR.Y.0010.180417T0600Z-180417T1700Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 141 PM PDT Mon Apr 16 2018 ...FROST ADVISORY REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 10 AM PDT TUESDAY... * LOW TEMPERATURES...Mid 30s. * LOCATIONS INCLUDE...Fort Bragg...Point Arena...Boonville... Comptche...Ukiah...Hopland...Orleans...Willow Creek... Petrolia...Honeydew...Ettersberg...Garberville...Bridgeville. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
068 WWUS76 KEKA 171003 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 303 AM PDT Tue Apr 17 2018 CAZ107-108-171700- /O.CON.KEKA.HZ.W.0003.000000T0000Z-180417T1700Z/ Northern Trinity-Southern Trinity- 303 AM PDT Tue Apr 17 2018 ...HARD FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * LOW TEMPERATURES...Mid to upper 20s in the coldest spots. * LOCATIONS INCLUDE...Hayfork...Ruth...Weaverville...Burnt Ranch...Trinity Center. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ110-111-171700- /O.CON.KEKA.FZ.W.0005.000000T0000Z-180417T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 303 AM PDT Tue Apr 17 2018 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * LOW TEMPERATURES...Lower 30s. * LOCATIONS INCLUDE...Leggett...Laytonville...Willits...Covelo.... * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ104>106-109-112-113-171700- /O.CON.KEKA.FR.Y.0010.000000T0000Z-180417T1700Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 303 AM PDT Tue Apr 17 2018 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT THIS MORNING... * LOW TEMPERATURES...mid 30s. * LOCATIONS INCLUDE...Fort Bragg...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 $$
784 WWUS76 KEKA 171638 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 938 AM PDT Tue Apr 17 2018 CAZ107-108-171745- /O.EXP.KEKA.HZ.W.0003.000000T0000Z-180417T1700Z/ Northern Trinity-Southern Trinity- 938 AM PDT Tue Apr 17 2018 ...HARD FREEZE WARNING WILL EXPIRE AT 10 AM PDT THIS MORNING... $$ CAZ110-111-171745- /O.EXP.KEKA.FZ.W.0005.000000T0000Z-180417T1700Z/ Northwestern Mendocino Interior-Northeastern Mendocino Interior- 938 AM PDT Tue Apr 17 2018 ...FREEZE WARNING WILL EXPIRE AT 10 AM PDT THIS MORNING... $$ CAZ104>106-109-112-113-171745- /O.EXP.KEKA.FR.Y.0010.000000T0000Z-180417T1700Z/ Southwestern Humboldt-Northern Humboldt Interior- Southern Humboldt Interior-Mendocino Coast- Southwestern Mendocino Interior-Southeastern Mendocino Interior- 938 AM PDT Tue Apr 17 2018 ...FROST ADVISORY WILL EXPIRE AT 10 AM PDT THIS MORNING... $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 3:15 AM PDT | Freeze Warning | EKA | Mendocino | 31 hr |
| Apr 16, 3:15 AM PDT | Hard Freeze Warning | EKA | Trinity | 31 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.