Alert archive / California / Red Flag Warnings in 2012
Red Flag Warning 8, NWS San Diego, CA
NWS San Diego, CA issued this red flag warning at Dec 10, 2012, 3:45 AM PST for 4 counties in California. It took effect at Dec 10, 2012, 8:00 AM PST. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 10, 2012, 3:45 AM PST (11:45 UTC)
- In effect from
- Dec 10, 2012, 8:00 AM PST
- Expired
- Dec 10, 2012, 12:43 PM PST
- In force
- 5 hr
- Issued by
- NWS San Diego, CA
Counties Orange County, CA, Riverside County, CA, San Bernardino County, CA, San Diego County, CA
The radar
The Santa Ana Mts radar (KSOX), 88 km from the middle of the area, began a volume at 11:46 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
San Diego, CA (KNKX), launched 00:00Z, 11.8 hours before the alert went out and 124 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
- 2501 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- -60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
505 WWUS86 KSGX 101145 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 345 AM PST MON DEC 10 2012 ...RED FLAG WARNING FOR THE MOUNTAINS AND INLAND VALLEYS TODAY FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITIES... .WEAK TO MODERATE OFFSHORE FLOW WILL CONTINUE INTO THIS AFTERNOON WITH GUSTY NORTHEAST WINDS AND LOWER RELATIVE HUMIDITIES OCCASIONALLY MEETING RED FLAG CRITERIA FOR AREAS THROUGH AND BELOW PASSES AND CANYONS TODAY. SLOW RECOVERY OF HUMIDITIES FOR TONIGHT AND TUESDAY WITH LOCALLY GUSTY NORTHEAST WINDS NEAR THE COASTAL FOOTHILLS. CAZ242-248-250-255>258-102200- /O.CAN.KSGX.FW.W.0007.000000T0000Z-121211T0000Z/ /O.NEW.KSGX.FW.W.0008.121210T1600Z-121211T0000Z/ ORANGE COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY INLAND VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS- INCLUDING THE MOUNTAIN TOP AND FRONT COUNTRY RANGER DISTRICTS OF THE SAN BERNARDINO NATIONAL FOREST-RIVERSIDE COUNTY MOUNTAINS- INCLUDING THE SAN JACINTO RANGER DISTRICT OF THE SAN BERNARDINO NATIONAL FOREST-SANTA ANA MOUNTAINS- INCLUDING THE TRABUCO RANGER DISTRICT OF THE CLEVELAND NATIONAL FOREST-SAN DIEGO COUNTY MOUNTAINS- INCLUDING THE PALOMAR AND DESCANSO RANGER DISTRICTS OF THE CLEVELAND NATIONAL FOREST- 345 AM PST MON DEC 10 2012 ...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 4 PM PST THIS AFTERNOON FOR STRONG GUSTY WINDS AND LOW HUMIDITIES... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A RED FLAG WARNING FOR STRONG GUSTY WINDS AND LOW HUMIDITIES...WHICH IS IN EFFECT FROM 8 AM THIS MORNING TO 4 PM PST THIS AFTERNOON. * WINDS...NORTHEAST 15 TO 25 MPH WITH GUSTS TO 45 MPH. * RELATIVE HUMIDITY...LOWEST AROUND 10 TO 15 PERCENT. * LOCATION...THROUGH AND BELOW PASSES AND CANYONS AND NEAR COASTAL FOOTHILLS. * OUTLOOK...LOCALLY GUSTY NORTHEAST WINDS TO 35 MPH WILL CONTINUE NEAR THE COASTAL FOOTHILLS INTO TUESDAY WITH POOR OVERNIGHT RECOVERY AND LOWEST DAYTIME HUMIDITIES TUESDAY AROUND 15 PERCENT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ HTTP://WEATHER.GOV/SANDIEG0 17
1 follow-up statement
868 WWUS86 KSGX 102043 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 1243 PM PST MON DEC 10 2012 CAZ242-248-250-255>258-102145- /O.CAN.KSGX.FW.W.0008.000000T0000Z-121211T0000Z/ ORANGE COUNTY COASTAL AREAS- SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY INLAND VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS- INCLUDING THE MOUNTAIN TOP AND FRONT COUNTRY RANGER DISTRICTS OF THE SAN BERNARDINO NATIONAL FOREST-RIVERSIDE COUNTY MOUNTAINS- INCLUDING THE SAN JACINTO RANGER DISTRICT OF THE SAN BERNARDINO NATIONAL FOREST-SANTA ANA MOUNTAINS- INCLUDING THE TRABUCO RANGER DISTRICT OF THE CLEVELAND NATIONAL FOREST-SAN DIEGO COUNTY MOUNTAINS- INCLUDING THE PALOMAR AND DESCANSO RANGER DISTRICTS OF THE CLEVELAND NATIONAL FOREST- 1243 PM PST MON DEC 10 2012 ...RED FLAG WARNING IS CANCELLED FOR STRONG WINDS AND LOW HUMIDITIES... ALTHOUGH CONDITIONS ARE DRY OVER MOST INLAND AREAS...WITH HUMIDITIES DOWN INTO TEENS TO LOW TWENTIES...OFFSHORE WINDS HAVE WEAKENED AND WILL CONTINUE TO WEAKEN THROUGH TUESDAY. THUS...WITH THE LACK OF SIGNIFICANT WINDS...THE RED FLAG WARNING HAS BEEN CANCELLED. $$ HTTP://WEATHER.GOV/SANDIEG0 HARRISON
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 10, 1:16 PM PST | Dense Fog Advisory | SGX | San Diego | 14 hr |
Nearby
Red Flag Warnings in California, 2012Every red flag warning 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.