Alert archive / California / Frost Advisories in 2012
Frost Advisory 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this frost advisory at Apr 5, 2012, 8:17 PM PDT for 4 counties in California. It took effect at Apr 6, 2012, 3:00 AM PDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- Apr 5, 2012, 8:17 PM PDT (03:17 UTC)
- In effect from
- Apr 6, 2012, 3:00 AM PDT
- Expired
- Apr 6, 2012, 8:00 AM PDT
- In force
- 5 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Marin County, CA, Monterey County, CA, Napa County, CA, Sonoma County, CA
The radar
The San Francisco radar (KMUX), 84 km from the middle of the area, began a volume at 03:17 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
Oakland, CA (KOAK), launched 00:00Z, 3.3 hours before the alert went out and 16 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
- 1593 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
896 WWUS76 KMTR 060317 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 817 PM PDT THU APR 5 2012 CAZ506-507-061130- /O.NEW.KMTR.FR.Y.0002.120406T1000Z-120406T1500Z/ NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS- 817 PM PDT THU APR 5 2012 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM PDT FRIDAY... THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 8 AM PDT FRIDAY. * TEMPERATURE: LOWS IN THE UPPER 20S TO MIDDLE 30S CAN BE EXPECTED WITH THE COOLEST READINGS IN SHELTERED LOCATIONS. * LOCATION: THE NORTH BAY VALLEYS PLUS NORTH BAY MOUNTAINS UNDER 1000 FEET. * IMPACTS: COLD TEMPERATURES COULD LEAD TO PLANTS BEING KILLED IF LEFT UNCOVERED. IN ADDITION...PATCHY FROST COULD MAKE FOR SLICK ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ CAZ516-061130- /O.NEW.KMTR.FR.Y.0002.120406T1000Z-120406T1500Z/ SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- 817 PM PDT THU APR 5 2012 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM PDT FRIDAY... THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM 3 AM TO 8 AM PDT FRIDAY. * TEMPERATURE: LOWS IN THE UPPER 20S TO MIDDLE 30S CAN BE EXPECTED WITH THE COOLEST READINGS IN SHELTERED LOCATIONS. * LOCATION: THE SOUTHERN SALINAS VALLEY. * IMPACTS: COLD TEMPERATURES COULD LEAD TO PLANTS BEING KILLED IF LEFT UNCOVERED. IN ADDITION...PATCHY FROST COULD MAKE FOR SLICK ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
2 follow-up statements
378 WWUS76 KMTR 061023 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 323 AM PDT FRI APR 6 2012 CAZ506-507-061500- /O.CON.KMTR.FR.Y.0002.000000T0000Z-120406T1500Z/ NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS- 323 AM PDT FRI APR 6 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... THE FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING. * TEMPERATURE: LOWS IN THE UPPER 20S TO MIDDLE 30S THROUGH 8 AM WITH THE COLDEST READINGS IN WIND SHELTERED LOCATIONS. * LOCATION: ALL NORTH BAY VALLEY FLOORS INCLUDING THE NORTH BAY MOUNTAINS WITH VALLEY LOCATIONS UNDER 1000 FEET. * IMPACTS: COLD TEMPERATURES COULD LEAD TO PLANTS BEING KILLED IF LEFT UNCOVERED. IN ADDITION...PATCHY FROST COULD MAKE FOR SLICK ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ CAZ516-061500- /O.CON.KMTR.FR.Y.0002.000000T0000Z-120406T1500Z/ SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- 323 AM PDT FRI APR 6 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING... THE FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM PDT THIS MORNING. * TEMPERATURE: LOWS IN THE UPPER 20S TO MIDDLE 30S THIS MORNING WITH THE COLDEST READINGS IN WIND SHELTERED LOCATIONS. * LOCATION: THE SOUTHERN SALINAS VALLEY. * IMPACTS: COLD TEMPERATURES COULD LEAD TO PLANTS BEING KILLED IF LEFT UNCOVERED. IN ADDITION...PATCHY FROST COULD MAKE FOR SLICK ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$
376 WWUS76 KMTR 061500 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 800 AM PDT FRI APR 6 2012 ...FROST ADVISORY HAS BEEN CANCELLED... CAZ506-507-516-061600- /O.CAN.KMTR.FR.Y.0002.000000T0000Z-120406T1500Z/ NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS- SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- 800 AM PDT FRI APR 6 2012 ...FROST ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN THE SAN FRANCISCO BAY AREA HAS CANCELLED THE FROST ADVISORY. TEMPERATURES ARE BEGINING TO WARM ENOUGH TO NO LONGER WARRANT A FROST ADVISORY. $$
Nearby
Frost Advisories in California, 2012Every frost advisory in 2012
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.