Alert archive / California / Red Flag Warnings in 2011
Red Flag Warning 3, NWS San Diego, CA
NWS San Diego, CA issued this red flag warning at Nov 2, 2011, 1:57 PM PDT for 4 counties in California. It was in force for 6 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
- Nov 2, 2011, 1:57 PM PDT (20:57 UTC)
- Expired
- Nov 2, 2011, 7:53 PM PDT
- In force
- 6 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 20:54 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
San Diego, CA (KNKX), launched 12:00Z, 9.0 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
- 2020 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- 57 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
754 WWUS86 KSGX 022057 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 157 PM PDT WED NOV 2 2011 ...MODERATE LOCALLY STRONG NORTHEAST WINDS AND LOW RELATIVE HUMIDITIES TO CONTINUE IN SOME AREAS THIS EVENING... .STRONG SURFACE HIGH PRESSURE OVER NEVADA AND UTAH IS BEGINNING TO WEAKEN...BUT STRONG NORTHEAST WINDS WILL CONTINUE IN SOME MOUNTAIN AREAS...AND SOME AREAS BELOW PASSES AND CANYONS INTO THE EVENING. THE WINDS ARE EXPECTED TO DECREASE ALL AREAS LATER IN THE EVENING. CAZ248-250-257-258-030400- /O.CAN.KSGX.FW.W.0002.000000T0000Z-111103T0100Z/ /O.NEW.KSGX.FW.W.0003.111102T2100Z-111103T0400Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY INLAND VALLEYS-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- 157 PM PDT WED NOV 2 2011 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM PDT THIS EVENING FOR STRONG WINDS AND LOW HUMIDITIES... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS ISSUED A RED FLAG WARNING FOR STRONG WINDS AND LOW HUMIDITIES...WHICH IS IN EFFECT UNTIL 9 PM PDT THIS EVENING. * WINDS...NORTHEAST 20 TO 30 MPH WITH GUSTS TO 45 MPH...WITH ISOLATED GUSTS TO 60 MPH. * RELATIVE HUMIDITY...5 PERCENT WITH POOR OVERNIGHT RECOVERY. * TIMING...STRONGEST WINDS EARLY AFTERNOON...DROPPING OFF LATE AFTERNOON...THEN TEMPORARILY INCREASING AGAIN...BEFORE DROPPING OFF LATE IN THE EVENING. * OUTLOOK...POOR HUMIDITY RECOVERY TONIGHT. LOW DAYTIME HUMIDITY THURSDAY MORNING...THEN RAPIDLY INCREASING RELATIVE HUMIDITIES THURSDAY AFTERNOON. 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. && $$ CAZ242-255-256-022200- /O.CAN.KSGX.FW.W.0002.000000T0000Z-111103T0100Z/ ORANGE COUNTY COASTAL AREAS-SAN BERNARDINO COUNTY MOUNTAINS- INCLUDING THE MOUNTAIN TOP AND FRONT COUNTRY RANGER DISTRICTS OF THE SAN BERNARDINO NATIONAL FOREST-RIVERSIDE COUNTY MOUNTAINS- INCLUDING THE SAN JACINTO RANGER DISTRICT OF THE SAN BERNARDINO NATIONAL FOREST- 157 PM PDT WED NOV 2 2011 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS CANCELLED THE RED FLAG WARNING. THE STRONG WINDS ARE EXPECTED TO DECREASE...BUT RELATIVE HUMIDITIES WILL STILL BE IN THE SINGLE DIGITS AND TEENS TONIGHT INTO THURSDAY MORNING. $$ HTTP://WEATHER.GOV/SANDIEG0 SMALL
1 follow-up statement
537 WWUS86 KSGX 030253 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 753 PM PDT WED NOV 2 2011 CAZ248-250-257-258-030400- /O.CAN.KSGX.FW.W.0003.000000T0000Z-111103T0400Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SAN DIEGO COUNTY INLAND VALLEYS-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- 753 PM PDT WED NOV 2 2011 ...RED FLAG WARNING IS CANCELLED FOR WINDS AND LOW HUMIDITY... THE NATIONAL WEATHER SERVICE IN SAN DIEGO HAS CANCELLED THE RED FLAG WARNING. WINDS HAVE DROPPED BELOW RED FLAG CRITERIA AND WILL CONTINUE TO DIMINISH THIS EVENING. POOR OVERNIGHT HUMIDITY RECOVERY IS EXPECTED WITH DRY CONDITIONS PREVAILING THROUGH THURSDAY AFTERNOON. $$ SS
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 2, 1:59 PM PDT | Wind Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 4 hr |
Nearby
Red Flag Warnings in California, 2011Every red flag warning in 2011
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.