Alert archive / California / Red Flag Warnings in 2012
Red Flag Warning 2, NWS San Diego, CA
NWS San Diego, CA issued this red flag warning at Jan 12, 2012, 1:20 PM PST for 4 counties in California. It took effect at Jan 13, 2012, 12:00 AM PST. It was in force for 16 hr. 6 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 12, 2012, 1:20 PM PST (21:20 UTC)
- In effect from
- Jan 13, 2012, 12:00 AM PST
- Expired
- Jan 13, 2012, 4:00 PM PST
- In force
- 16 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 21:21 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 13, 8:40 AM PST | NON-TSTM WND GST 47 | 5 Ese Cuyamaca Peak, CA | LUCKY FIVE RANCH - SDGE STATION |
| Jan 13, 8:40 AM PST | NON-TSTM WND GST 48 | 2 Wsw Cuyamaca Peak, CA | BOULDER CREEK - SDGE STATION |
| Jan 13, 8:40 AM PST | NON-TSTM WND GST 48 | 3 Nnw Potrero, CA | ROUND POTRERO - SDGE STATION |
| Jan 13, 9:30 AM PST | NON-TSTM WND GST 41 | 4 Wnw Rancho Bernardo, CA | WEST RANCHO BERNARDO - SDGE STATION |
| Jan 13, 9:45 AM PST | NON-TSTM WND GST 57 | 5 Sw Banning, CA | HIGHLAND SPRINGS RAWS STATION MEASURED A WIND GUST OF 57 MPH SOMETIME BETWEEN 916 AM AND 1016 AM. |
| Jan 13, 11:10 AM PST | NON-TSTM WND GST 50 | 5 Sw Dulzura, CA | OTAY MOUNTAIN - SDGE STATION |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
San Diego, CA (KNKX), launched 12:00Z, 9.3 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
- 3065 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 11 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.
430 WWUS86 KSGX 122120 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 120 PM PST THU JAN 12 2012 ...RED FLAG WARNING IN EFFECT FROM MIDNIGHT TONIGHT THROUGH 2 PM FRIDAY FOR VERY LOW HUMIDITIES AND GUSTY NORTHEAST TO EAST WINDS... .A SURFACE RIDGE OF HIGH PRESSURE WILL BUILD INTO THE GREAT BASIN TONIGHT...WITH PRESSURE GRADIENTS INCREASING ACROSS SOUTHERN CALIFORNIA. THE RESULTING MODERATE NORTHEAST WINDS WILL BE GUSTY AT TIMES...ESPECIALLY THROUGH AND BELOW THE FAVORED CANYONS AND PASSES. OVERNIGHT HUMIDITY RECOVERIES WILL BE POOR...WITH HUMIDITIES FALLING INTO THE SINGLE DIGITS OVER PORTIONS OF THE INLAND EMPIRE AND SANTA ANA MOUNTAINS ON FRIDAY. THESE GUSTY WINDS WILL COMBINE WITH THE VERY DRY CONDITIONS TO POTENTIALLY CAUSE SIGNIFICANT FIRE WEATHER CONCERNS. CAZ248-257-131400- /O.NEW.KSGX.FW.W.0002.120113T0800Z-120113T2200Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SANTA ANA MOUNTAINS- INCLUDING THE TRABUCO RANGER DISTRICT OF THE CLEVELAND NATIONAL FOREST- 120 PM PST THU JAN 12 2012 ...RED FLAG WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 2 PM PST FRIDAY 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 MIDNIGHT TONIGHT TO 2 PM PST FRIDAY. * WINDS...NORTHEAST TO EAST WINDS 15 TO 25 MPH WITH GUSTS TO 50 MPH. * RELATIVE HUMIDITY...LOWEST DAYTIME AROUND 5 PERCENT...WITH POOR OVERNIGHT RECOVERY. * TIMING...WINDS WILL INCREASE THIS EVENING...BRINGING MUCH DRIER AIR TO PORTIONS OF THE INLAND EMPIRE AND SANTA ANA MOUNTAINS DURING THE OVERNIGHT HOURS. THE STRONGEST WINDS WILL OCCUR DURING THE MORNING HOURS...AND GRADUALLY DECREASE THROUGH THE DAY. HUMIDITIES WILL FALL INTO THE SINGLE DIGITS EARLY FRIDAY MORNING...AND REMAIN VERY LOW THROUGH THE EARLY AFTERNOON. * OUTLOOK...VERY DRY CONDITIONS WILL CONTINUE TO BE POSSIBLE THROUGH SATURDAY...WITH POOR RECOVERIES POSSIBLE ONCE AGAIN FRIDAY NIGHT. 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. && $$ HTTP://WEATHER.GOV/SANDIEG0 PALMER
2 follow-up statements
786 WWUS86 KSGX 131124 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 324 AM PST FRI JAN 13 2012 ...RED FLAG WARNING IN EFFECT THROUGH 4 PM TODAY FOR VERY LOW HUMIDITIES AND GUSTY NORTHEAST TO EAST WINDS FOR THE INLAND EMPIRE AND THE SANTA ANA MOUNTAINS AND FOOTHILLS... .SURFACE HIGH PRESSURE OVER THE GREAT BASIN WILL BRING VERY LOW HUMIDITIES TODAY WITH GUSTY NORTHEAST TO EAST WINDS THROUGH AND BELOW PASSES AND CANYONS AND ALONG COASTAL SLOPES THIS MORNING...DECREASING THIS AFTERNOON. CAZ248-257-140000- /O.EXT.KSGX.FW.W.0002.000000T0000Z-120114T0000Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SANTA ANA MOUNTAINS- INCLUDING THE TRABUCO RANGER DISTRICT OF THE CLEVELAND NATIONAL FOREST- 324 AM PST FRI JAN 13 2012 ...RED FLAG WARNING NOW IN EFFECT UNTIL 4 PM PST THIS AFTERNOON FOR STRONG GUSTY WINDS AND LOW HUMIDITIES... THE RED FLAG WARNING IS NOW IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * WINDS...NORTHEAST 15 TO 25 MPH WITH GUSTS TO 45 MPH. * RELATIVE HUMIDITY...LOWEST DAYTIME AROUND 5 PERCENT. * TIMING...STRONGEST WINDS THROUGH MID MORNING...THEN GRADUALLY DECREASING THROUGH THIS AFTERNOON. HUMIDITIES WILL FALL TO BELOW 10 PERCENT BY MID MORNING...WITH SLOW RECOVERY IN THE LATE AFTERNOON. * OUTLOOK...POOR RECOVERY OF HUMIDITIES FOR TONIGHT...THEN VERY DRY AGAIN SATURDAY. WINDS WILL BE MUCH WEAKER WITH ONLY LOCALLY GUSTY NORTHEAST TO EAST WINDS NEAR THE COASTAL FOOTHILLS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ HTTP://WEATHER.GOV/SANDIEG0 MARTIN
212 WWUS86 KSGX 140005 RFWSGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN DIEGO CA 405 PM PST FRI JAN 13 2012 ...RED FLAG WARNING EXPIRED AT 4 PM... CAZ248-257-140115- /O.EXP.KSGX.FW.W.0002.000000T0000Z-120114T0000Z/ SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE- SANTA ANA MOUNTAINS- INCLUDING THE TRABUCO RANGER DISTRICT OF THE CLEVELAND NATIONAL FOREST- 405 PM PST FRI JAN 13 2012 ...RED FLAG WARNING HAS EXPIRED FOR THE STRONG GUSTY WINDS AND LOW HUMIDITIES... THE RED FLAG WARNING IS NO LONGER IN EFFECT. HOWEVER...LOW HUMIDITIES...BELOW 10 PERCENT AT TIMES...WILL CONTINUE SATURDAY. WHILE A FEW GUSTS AROUND 40 MPH WILL CONTINUE BELOW BANNING PASS LATE THIS AFTERNOON AND EARLY THIS EVENING...WINDS WILL BE LIGHTER LATER TONIGHT AND SATURDAY. MOST SUSTAINED WINDS WILL BE BELOW 20 MPH AND GUSTS MOSTLY BELOW 30 MPH OVERNIGHT AND SATURDAY. $$ MAXWELL
The office that day
Everything else NWS San Diego, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 12, 1:10 PM PST | Wind Advisory | SGX | Orange, Riverside, San Bernardino, San Diego | 24 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.