Alert archive / California / Frost Advisories in 2016
Frost Advisory 12, NWS Eureka, CA
NWS Eureka, CA issued this frost advisory at Oct 18, 2016, 10:53 PM PDT for Trinity County, California. It took effect at Oct 18, 2016, 11:00 PM PDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Oct 18, 2016, 10:53 PM PDT (05:53 UTC)
- In effect from
- Oct 18, 2016, 11:00 PM PDT
- Expired
- Oct 19, 2016, 8:00 AM PDT
- In force
- 9 hr
- Issued by
- NWS Eureka, CA
County Trinity County, CA
The radar
The Eureka (Bunker Hill) radar (KBHX), 101 km from the middle of the area, began a volume at 05:59 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, 5.9 hours before the alert went out and 193 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
- 74 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1106 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
070 WWUS76 KEKA 190553 NPWEKA URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 1053 PM PDT TUE OCT 18 2016 ...CLEAR SKIES AND LIGHT WINDS WILL PROMOTE AREAS OF FROST ACROSS THE VALLEYS OF TRINITY COUNTY TONIGHT AND THROUGH MID MORNING WEDNESDAY... CAZ107-108-191500- /O.NEW.KEKA.FR.Y.0012.161019T0600Z-161019T1500Z/ NORTHERN TRINITY-SOUTHERN TRINITY- 1053 PM PDT TUE OCT 18 2016 ...FROST ADVISORY IN EFFECT UNTIL 8 AM PDT WEDNESDAY... THE NATIONAL WEATHER SERVICE IN EUREKA HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM PDT WEDNESDAY. * LOW TEMPERATURES...MID 30S. * LOCATIONS INCLUDE...VALLEYS AND DRAINAGES WITHIN TRINITY COUNTY. * 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. && $$
1 follow-up statement
605 WWUS76 KEKA 191450 NPWEKA URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE EUREKA CA 750 AM PDT WED OCT 19 2016 CAZ107-108-191600- /O.EXP.KEKA.FR.Y.0012.000000T0000Z-161019T1500Z/ NORTHERN TRINITY-SOUTHERN TRINITY- 750 AM PDT WED OCT 19 2016 ...FROST ADVISORY WILL EXPIRE AT 8 AM PDT THIS MORNING... OVERNIGHT TEMPERATURES MAY FALL INTO THE MID 30S IN SOME OF THE VALLEYS EARLY THURSDAY MORNING. PATCHES OF EARLY MORNING FROST WILL ONCE AGAIN BE POSSIBLE. $$
The office that day
Everything else NWS Eureka, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 18, 6:05 PM PDT | Small Craft Advisory | EKA | 3 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.