Alert archive / California / Frost Advisories in 2017
Frost Advisory 36, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Dec 4, 2017, 10:13 AM PST for Del Norte County, Humboldt County, California. It took effect at Dec 5, 2017, 1:00 AM PST. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Dec 4, 2017, 10:13 AM PST (18:13 UTC)
- In effect from
- Dec 5, 2017, 1:00 AM PST
- Expired
- Dec 5, 2017, 9:00 AM PST
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 86 km from the middle of the area, began a volume at 18:13 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, 6.2 hours before the alert went out and 158 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
- 508 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
509 WWUS76 KEKA 041813 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 1013 AM PST Mon Dec 4 2017 CAZ102-050715- /O.EXP.KEKA.FZ.W.0012.000000T0000Z-171204T1800Z/ /O.NEW.KEKA.FR.Y.0036.171205T0900Z-171205T1700Z/ Del Norte Interior- 1013 AM PST Mon Dec 4 2017 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PST TUESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 9 AM PST Tuesday. * LOW TEMPERATURES...33 to 36 degrees. * LOCATIONS INCLUDE...Valleys and low lying areas including Gasquet. * 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. && $$ CAZ105-106-041915- /O.EXP.KEKA.FZ.W.0012.000000T0000Z-171204T1800Z/ Northern Humboldt Interior-Southern Humboldt Interior- 1013 AM PST Mon Dec 4 2017 ...FREEZE WARNING HAS EXPIRED... $$ CAZ101-103-104-050715- /O.EXP.KEKA.FR.Y.0035.000000T0000Z-171204T1800Z/ /O.NEW.KEKA.FR.Y.0036.171205T0900Z-171205T1700Z/ Coastal Del Norte-Northern Humboldt Coast-Southwestern Humboldt- 1013 AM PST Mon Dec 4 2017 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PST TUESDAY... The National Weather Service in Eureka has issued a Frost Advisory...which is in effect from 1 AM to 9 AM PST Tuesday. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Sensitive outdoor plants may be killed if left uncovered. && $$ CAZ109-112-041915- /O.EXP.KEKA.FR.Y.0035.000000T0000Z-171204T1800Z/ Mendocino Coast-Southwestern Mendocino Interior- 1013 AM PST Mon Dec 4 2017 ...FROST ADVISORY HAS EXPIRED... $$ CAZ113-050715- /O.EXT.KEKA.WI.Y.0036.171205T0000Z-171205T1500Z/ Southeastern Mendocino Interior- 1013 AM PST Mon Dec 4 2017 ...WIND ADVISORY NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 AM PST TUESDAY ABOVE 1500 FEET... * WINDS...East-northeasterly 20 to 35 mph with gusts from 45 to 55 mph. * LOCATIONS INCLUDE...Hills, ridges, and exposed areas above 1500 feet in elevation across southeast Mendocino county. * HIGHWAY IMPACTED...Elevated portions of Highway 175. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
4 follow-up statements
836 WWUS76 KEKA 041822 AAA NPWEKA URGENT - WEATHER MESSAGE...UPDATED National Weather Service Eureka CA 1022 AM PST Mon Dec 4 2017 CAZ101>104-050545- /O.CON.KEKA.FR.Y.0036.171205T0900Z-171205T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt- 1022 AM PST Mon Dec 4 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PST TUESDAY... * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Crescent City...Arcata...Eureka... Fortuna...Gasquet...Petrolia...Honeydew...Ettersberg. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map PRECAUTIONARY/PREPAREDNESS ACTIONS... A Frost Advisory means that frost is possible. Outdoor plants sensitive to cold temperatures may suffer or die if left uncovered. $$ CAZ113-050545- /O.CON.KEKA.WI.Y.0036.171205T0000Z-171205T1500Z/ Southeastern Mendocino Interior- 1022 AM PST Mon Dec 4 2017 ...WIND ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 7 AM PST TUESDAY FOR HILLS AND RIDGES OR EXPOSED AREAS ABOVE 1500 FEET IN ELEVATION ACROSS SOUTHEAST MENDOCINO COUNTY... * WINDS...East-northeasterly 20 to 35 mph with gusts from 45 to 55 mph. * LOCATIONS INCLUDE...Hills, ridges, and exposed areas above 1500 feet in elevation across southeast Mendocino county. * HIGHWAY IMPACTED...Elevated portions of Highway 175. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
998 WWUS76 KEKA 050457 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 857 PM PST Mon Dec 4 2017 CAZ101>104-051700- /O.CON.KEKA.FR.Y.0036.171205T0900Z-171205T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt- 857 PM PST Mon Dec 4 2017 ...FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PST TUESDAY... * LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Crescent City...Arcata...Eureka... Fortuna...Gasquet...Petrolia...Honeydew...Ettersberg. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ113-051500- /O.CON.KEKA.WI.Y.0036.000000T0000Z-171205T1500Z/ Southeastern Mendocino Interior- 857 PM PST Mon Dec 4 2017 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST TUESDAY FOR HILLS AND RIDGES OR EXPOSED AREAS ABOVE 1500 FEET... * WINDS...East-northeasterly 20 to 35 mph with gusts from 45 to 55 mph. * LOCATIONS INCLUDE...Hills, ridges, and exposed areas above 1500 feet in elevation across southeast Mendocino county. * HIGHWAY IMPACTED...Elevated portions of Highway 175. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
872 WWUS76 KEKA 051112 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 312 AM PST Tue Dec 5 2017 CAZ101>104-051700- /O.CON.KEKA.FR.Y.0036.000000T0000Z-171205T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt- 312 AM PST Tue Dec 5 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... LOW TEMPERATURES...Low to mid 30s. * LOCATIONS INCLUDE...Crescent City...Arcata...Eureka... Fortuna...Gasquet...Petrolia...Honeydew...Ettersberg. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$ CAZ113-051500- /O.CON.KEKA.WI.Y.0036.000000T0000Z-171205T1500Z/ Southeastern Mendocino Interior- 312 AM PST Tue Dec 5 2017 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 7 AM PST THIS MORNING ABOVE 1500 FEET... * WINDS...East-northeasterly 20 to 35 mph with gusts from 45 to 55 mph. * LOCATIONS INCLUDE...Hills, ridges, and exposed areas above 1500 feet in elevation across southeast Mendocino county. * HIGHWAY IMPACTED...Elevated portions of Highway 175. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
294 WWUS76 KEKA 051445 NPWEKA URGENT - WEATHER MESSAGE National Weather Service Eureka CA 645 AM PST Tue Dec 5 2017 CAZ113-051545- /O.EXP.KEKA.WI.Y.0036.000000T0000Z-171205T1500Z/ Southeastern Mendocino Interior- 645 AM PST Tue Dec 5 2017 ...WIND ADVISORY WILL EXPIRE AT 7 AM PST THIS MORNING ABOVE 1500 FEET... $$ CAZ101>104-051700- /O.CON.KEKA.FR.Y.0036.000000T0000Z-171205T1700Z/ Coastal Del Norte-Del Norte Interior-Northern Humboldt Coast- Southwestern Humboldt- 645 AM PST Tue Dec 5 2017 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING... * LOCATIONS INCLUDE...Crescent City...Arcata...Eureka... Fortuna...Gasquet...Petrolia...Honeydew...Ettersberg. * FOR A DETAILED VIEW OF THE HAZARD AREA...visit http://www.wrh.noaa.gov/map $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 3, 7:06 PM PST | Small Craft Advisory | EKA | 17 hr | |
| Dec 4, 2:12 AM PST | Beach Hazards Statement | EKA | Del Norte, Humboldt, Mendocino | 38 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.