Alert archive / California / Frost Advisories in 2012
Frost Advisory 2, NWS San Diego, CA
NWS San Diego, CA issued this frost advisory at Apr 6, 2012, 3:48 PM PDT for San Bernardino County, California. It took effect at Apr 7, 2012, 12:00 AM PDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2012, 3:48 PM PDT (22:48 UTC)
- In effect from
- Apr 7, 2012, 12:00 AM PDT
- Expired
- Apr 7, 2012, 8:00 AM PDT
- In force
- 8 hr
- Issued by
- NWS San Diego, CA
County San Bernardino County, CA
The nearest sounding before it
Las Vegas, NV (KVEF), launched 12:00Z, 10.8 hours before the alert went out and 180 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
- 2456 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
170 WWUS76 KSGX 062248 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 348 PM PDT FRI APR 6 2012 ...TEMPERATURES FALLING TO AROUND FREEZING FOR SEVERAL HOURS OVERNIGHT... .VERY DRY AIR...LIGHT WINDS...AND CLEAR SKIES WILL ALLOW TEMPERATURES TO PLUMMET AFTER SUNSET. SURFACE TEMPERATURES NEAR FREEZING ARE LIKELY FOR SEVERAL HOURS AROUND SUNRISE IN WIND SHELTERED AREAS. CAZ060-070700- /O.NEW.KSGX.FR.Y.0002.120407T0700Z-120407T1400Z/ APPLE AND LUCERNE VALLEYS- 348 PM PDT FRI APR 6 2012 ...FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM PDT SATURDAY... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A FROST ADVISORY...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 7 AM PDT SATURDAY. * TEMPERATURE...FALLING TO 30 TO 33 DEGREES BY 4 AM PDT IN MANY WIND SHELTERED AREAS. * IMPACTS...THE COLD CAN RESULT IN SIGNIFICANT DAMAGE TO SENSITIVE EXPOSED CROPS AND PLANTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ JAD
3 follow-up statements
530 WWUS76 KSGX 070430 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 930 PM PDT FRI APR 6 2012 ...TEMPERATURES FALLING TO AROUND FREEZING FOR SEVERAL HOURS OVERNIGHT... .VERY DRY AIR...LIGHT WINDS...AND MOSTLY CLEAR SKIES WILL ALLOW TEMPERATURES TO PLUMMET LATE TONIGHT. SURFACE TEMPERATURES NEAR FREEZING ARE LIKELY FOR SEVERAL HOURS AROUND SUNRISE IN WIND SHELTERED AREAS. CAZ060-071230- /O.CON.KSGX.FR.Y.0002.120407T0700Z-120407T1400Z/ APPLE AND LUCERNE VALLEYS- 930 PM PDT FRI APR 6 2012 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 7 AM PDT SATURDAY... * TEMPERATURE...FALLING TO 30 TO 33 DEGREES BY 4 AM PDT IN MANY WIND SHELTERED AREAS. * IMPACTS...THE COLD CAN RESULT IN SIGNIFICANT DAMAGE TO SENSITIVE EXPOSED CROPS AND PLANTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ JAD
941 WWUS76 KSGX 071101 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 401 AM PDT SAT APR 7 2012 ...TEMPERATURES FALLING TO NEAR FREEZING EARLY THIS MORNING FOR THE UPPER DESERT WITH AREAS OF FROST... .VERY DRY AIR...LIGHT WINDS...AND MOSTLY CLEAR SKIES WILL ALLOW TEMPERATURES TO FALL TO NEAR FREEZING EARLY THIS MORNING IN WIND SHELTERED LOCATIONS WITH AREAS OF FROST. CAZ060-071500- /O.EXT.KSGX.FR.Y.0002.000000T0000Z-120407T1500Z/ APPLE AND LUCERNE VALLEYS- 401 AM PDT SAT APR 7 2012 ...FROST ADVISORY NOW IN EFFECT UNTIL 8 AM PDT THIS MORNING... * TEMPERATURE...TEMPERATURES BETWEEN 29 AND 33 DEGREES IN WIND SHELTERED LOCATIONS THROUGH 8 AM THIS MORNING WITH AREAS OF FROST. * IMPACTS...THE COLD CAN RESULT IN SIGNIFICANT DAMAGE TO SENSITIVE EXPOSED CROPS AND PLANTS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FROST ADVISORY MEANS THAT FROST IS POSSIBLE. SENSITIVE OUTDOOR PLANTS MAY BE KILLED IF LEFT UNCOVERED. && $$ MARTIN
808 WWUS76 KSGX 071455 NPWSGX URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 755 AM PDT SAT APR 7 2012 CAZ060-071600- /O.EXP.KSGX.FR.Y.0002.000000T0000Z-120407T1500Z/ APPLE AND LUCERNE VALLEYS- 755 AM PDT SAT APR 7 2012 ...FROST ADVISORY WILL EXPIRE AT 8 AM PDT THIS MORNING... TEMPERATURES ACROSS THE WIND SHELTERED AREAS OF APPLE AND LUCERNE VALLEYS WILL CONTINUE TO WARM ABOVE FREEZING THIS MORNING...WITH THE THREAT OF FROST DIMINISHING. THEREFORE...THE FROST ADVISORY WILL EXPIRE AT 8 AM. $$ PALMER
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 1:37 PM PDT | Small Craft Advisory for Winds | SGX | 7 hr |
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.