Alert archive / California / Frost Advisories in 2016
Frost Advisory 15, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Nov 16, 2016, 9:50 PM PST for Del Norte County, Humboldt County, Mendocino County, California. It took effect at Nov 17, 2016, 1:00 AM PST. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Nov 16, 2016, 9:50 PM PST (05:50 UTC)
- In effect from
- Nov 17, 2016, 1:00 AM PST
- Expired
- Nov 17, 2016, 9:00 AM PST
- In force
- 8 hr
- Issued by
- NWS Eureka, CA
Counties Del Norte County, CA, Humboldt County, CA, Mendocino County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 47 km from the middle of the area, began a volume at 05:54 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, 5.8 hours before the alert went out and 210 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
- 12 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 789 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
629 WWUS76 KEKA 170550 NPWEKA URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 950 PM PST WED NOV 16 2016 ...FREEZING CONDITIONS EXPECTED... .COLDER AIR MOVING INTO THE REGION AND LIGHT WINDS WILL RESULT IN OVERNIGHT LOWS DROPPING INTO THE MID 20S TO LOWER 30S FOR SOME INTERIOR VALLEYS. CAZ102-105>108-110-111-113-171700- /O.CON.KEKA.FZ.W.0002.161117T0900Z-161117T1700Z/ DEL NORTE INTERIOR-NORTHERN HUMBOLDT INTERIOR- SOUTHERN HUMBOLDT INTERIOR-NORTHERN TRINITY-SOUTHERN TRINITY- NORTHWESTERN MENDOCINO INTERIOR-NORTHEASTERN MENDOCINO INTERIOR- SOUTHEASTERN MENDOCINO INTERIOR- 950 PM PST WED NOV 16 2016 ...FREEZE WARNING REMAINS IN EFFECT FROM 1 AM TO 9 AM PST THURSDAY... * LOW TEMPERATURES...MID 20S TO LOWER 30S. COLDEST LOCATIONS FORECAST TO BE IN TRINITY...EASTERN HUMBOLDT...AND NORTHEASTERN MENDOCINO COUNTIES. * LOCATIONS INCLUDE...ORLEANS...HOOPA...WILLOW CREEK... DENNY...CARRVILLE...BURNT RANCH...BIG BAR...WEAVERVILLE... LEWISTON...BRIDGEVILLE...DINSMORE...HYAMPOM...FOREST GLEN... PEANUT...HAYFORK...RICHARDSON GROVE...LEGGETT...LAYTONVILLE... COVELO...AND 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. && $$ CAZ101-103-104-109-112-171700- /O.NEW.KEKA.FR.Y.0015.161117T0900Z-161117T1700Z/ COASTAL DEL NORTE-NORTHERN HUMBOLDT COAST-SOUTHWESTERN HUMBOLDT- MENDOCINO COAST-SOUTHWESTERN MENDOCINO INTERIOR- 950 PM PST WED NOV 16 2016 ...FROST ADVISORY IN EFFECT FROM 1 AM TO 9 AM PST THURSDAY... THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 1 AM TO 9 AM PST THURSDAY. * LOW TEMPERATURES...33 TO 36 DEGREES. FROST MOST LIKELY TO OCCUR SLIGHTLY AWAY FROM THE IMMEDIATE COAST...PROTECTED VALLEYS...AND AT SLIGHTLY HIGHER ELEVATIONS. * LOCATIONS INCLUDE...OUTER EUREKA AND ARCATA NEIGHBORHOODS SUCH AS HUMBOLDT HILL...CUTTEN...AND FRESHWATER...ALSO BLUE LAKE...FORTUNA...ORICK...MENDOCINO...BOONVILLE...MANCHESTER... HONEYDEW. * FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT HTTP://WWW.WRH.NOAA.GOV/MAP PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 17, 2:57 PM PST | Gale Warning | EKA | 60 hr | |
| Nov 17, 3:23 PM PST | Wind Advisory | EKA | Del Norte, Humboldt, Mendocino | 36 hr |
Nearby
Frost Advisories in California, 2016Every frost advisory in 2016
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.