Alert archive / California / Red Flag Warnings in 2020
Red Flag Warning 6, NWS San Diego, CA
NWS San Diego, CA issued this red flag warning at Nov 25, 2020, 1:25 PM PST for 4 counties in California. It took effect at Nov 26, 2020, 2:00 PM PST. It was in force for 43 hr. 21 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
- Nov 25, 2020, 1:25 PM PST (21:25 UTC)
- In effect from
- Nov 26, 2020, 2:00 PM PST
- Expired
- Nov 28, 2020, 9:00 AM PST
- In force
- 43 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 21:25 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 |
|---|---|---|---|
| Nov 26, 9:40 PM PST | NON-TSTM WND GST 66 | 3 S Lytle Creek, CA | MESONET STATION 055SE SAN SEVAINE FLATS (SCE1055). |
| Nov 27, 12:08 AM PST | NON-TSTM WND GST 68 | 5 Ene Yorba Linda, CA | MESONET STATION TT661 CHINO HILLS. |
| Nov 27, 12:40 AM PST | NON-TSTM WND GST 56 | 9 Ssw Julian, CA | MESONET STATION SILSD SILL HILL (SDGE). |
| Nov 27, 1:03 AM PST | NON-TSTM WND GST 68 | 13 Sw La Quinta, CA | MESONET STATION HP003 TORO PEAK (HPWREN). |
| Nov 27, 1:35 AM PST | NON-TSTM WND GST 56 | 9 Wnw Santa Ysabel, CA | MESONET STATION HP016 BIG BLACK MOUNTAIN (HPWREN). |
| Nov 27, 1:51 AM PST | NON-TSTM WND GST 79 | 8 Ene Orange, CA | MESONET STATION FRCC1 FREMONT CANYON. |
| Nov 27, 2:00 AM PST | NON-TSTM WND GST 59 | 4 Ene Riverside, CA | MESONET STATION AV480 GRAND TERRACE. |
| Nov 27, 2:15 AM PST | NON-TSTM WND GST 64 | 2 Nw Running Springs, CA | MESONET STATION HHPC1 HEAPS PEAK. |
| Nov 27, 3:00 AM PST | NON-TSTM WND GST 57 | 4 Sse Pine Valley, CA | MESONET STATION HF003 HORSE LAUNCH (PINE VALLEY). |
| Nov 27, 3:30 AM PST | NON-TSTM WND GST 56 | 6 Wnw Campo, CA | MESONET STATION HAUSD HAUSER MOUNTAIN. |
| Nov 27, 4:00 AM PST | NON-TSTM WND GST 63 | 4 S Lytle Creek, CA | MESONET STATION 056SE LYTLE CREEK SOUTH (SCE1056). |
| Nov 27, 4:30 AM PST | NON-TSTM WND GST 58 | 6 Ese Ontario, CA | MESONET STATION SE777 JURUPA HILLS (SCE777). |
| Nov 27, 6:40 AM PST | NON-TSTM WND GST 60 | 3 Sw Devore, CA | MESONET STATION SE156 LYTLE CREEK WASH (SCE156). |
| Nov 27, 6:45 AM PST | NON-TSTM WND GST 57 | 4 Ssw Crestline, CA | MESONET STATION HF009 BADGER CANYON (HF009). |
| Nov 27, 7:10 AM PST | NON-TSTM WND GST 61 | 3 Sw Crestline, CA | MESONET STATION SE125 DEVIL CANYON (SCE125). |
| Nov 27, 9:40 AM PST | NON-TSTM WND GST 56 | 6 S Lytle Creek, CA | MESONET STATION SE271 NORTH FONTANA (SCE271). |
| Nov 27, 10:20 AM PST | NON-TSTM WND GST 56 | 8 Ne Campo, CA | MESONET STATION CWDSD CRESTWOOD (SDGE). |
| Nov 27, 11:00 AM PST | NON-TSTM WND GST 57 | 5 S Devore, CA | MESONET STATION SE846 RIALTO (SCE846). |
| Nov 27, 11:30 AM PST | NON-TSTM WND GST 80 | 3 S Crestline, CA | MESONET STATION HF008 MARSHALL PEAK. |
| Nov 27, 2:00 PM PST | WILDFIRE | 6 Se Alpine, CA | *** 1 INJ *** HAWK WILDFIRE REPORTED BY CALFIRE/SAN DIEGO COUNTY WHICH STARTED AT JAPATUL VALLEY ROAD AND RED HAWK RIDGE. THE FIRE WAS FULLY CONTAINED SEVERAL HOURS LATER WITH A TOTAL SPREAD OF 10 ACRES. ONE FIREFIGHTER WAS INJURED. CONDITIONS AT THE TIME OF T |
| Nov 27, 9:00 PM PST | WILDFIRE | 2 Ne Highland, CA | *** 2 INJ *** GULCH WILDFIRE REPORTED BY SAN BERNARDINO NATIONAL FOREST (USFS) NORTHEAST OF HIGHLAND NORTH OF CLOVERHILL DR. AS OF SATURDAY MORNING 11/28 IT WAS 10 ACRES AND 80% CONTAINED. 2 PERSONS WERE TRAPPED AND HAD TO BE RESCUED FRIDAY EVENING 11/27. COND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Yuma Prvg Ground, AZ (K1Y7), launched 12:00Z, 9.4 hours before the alert went out and 258 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
- 3131 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
272 WWUS86 KSGX 252125 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 125 PM PST Wed Nov 25 2020 CAZ248-255>257-265-554-260530- /O.UPG.KSGX.FW.A.0006.201126T2200Z-201128T0600Z/ /O.NEW.KSGX.FW.W.0006.201126T2200Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 125 PM PST Wed Nov 25 2020 ...RED FLAG WARNING IN EFFECT FROM 2 PM THURSDAY TO 6 PM PST FRIDAY FOR SANTA ANA WINDS AND LOW HUMIDITY... The National Weather Service in San Diego has issued a Red Flag Warning...which is in effect from 2 PM Thursday to 6 PM PST Friday. * WIND...Northeast 20 to 30 mph with gusts to 55 mph. Isolated gusts to 65 mph. * HUMIDITY...Falling to 10 to 15 percent Thursday and 8 to 12 percent Friday and Saturday with poor overnight recovery. * TIMING...The strongest winds are expected from late afternoon on Thursday through Friday morning. * OUTLOOK...Weak winds will continue into Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. Use extreme caution with potential fire ignition sources. Residents are urged to assemble their emergency supply kit. && 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 can contribute to extreme fire behavior. && $$ CAZ250-258-260530- /O.UPG.KSGX.FW.A.0006.201127T0500Z-201128T2200Z/ /O.NEW.KSGX.FW.W.0006.201127T0500Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 125 PM PST Wed Nov 25 2020 ...RED FLAG WARNING IN EFFECT FROM 9 PM THURSDAY TO 9 AM PST SATURDAY FOR SANTA ANA WINDS AND LOW HUMIDITY... The National Weather Service in San Diego has issued a Red Flag Warning...which is in effect from 9 PM Thursday to 9 AM PST Saturday. * WIND...North to northeast 15 to 25 mph with gusts to 35 mph Thursday night into Friday, then becoming northeast 20 to 30 mph with gusts to 45 mph Friday afternoon and evening with isolated stronger gusts. * HUMIDITY...Falling Thursday night with lowest daytime humidity on Friday and Saturday 8 to 12 percent. * TIMING...Strongest winds Thursday night and Friday. * OUTLOOK...Weaker winds continue into Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Moede
9 follow-up statements
119 WWUS86 KSGX 260534 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 934 PM PST Wed Nov 25 2020 CAZ248-255>257-265-554-261345- /O.CON.KSGX.FW.W.0006.201126T2200Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 934 PM PST Wed Nov 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THURSDAY TO 6 PM PST FRIDAY FOR SANTA ANA WINDS AND LOW HUMIDITY... * WIND...Northeast 20 to 30 mph with gusts to 55 mph. Isolated gusts to 65 mph. * HUMIDITY...Falling to 10 to 15 percent Thursday and 8 to 12 percent Friday and Saturday with poor overnight recovery. * TIMING...The strongest winds are expected from late afternoon on Thursday through Friday morning. * OUTLOOK...Weak winds will continue into Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. Use extreme caution with potential fire ignition sources. Residents are urged to assemble their emergency supply kit. 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 can contribute to extreme fire behavior. && $$ CAZ250-258-261345- /O.CON.KSGX.FW.W.0006.201127T0500Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 934 PM PST Wed Nov 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THURSDAY TO 9 AM PST SATURDAY FOR SANTA ANA WINDS AND LOW HUMIDITY... * WIND...North to northeast 15 to 25 mph with gusts to 35 mph Thursday night into Friday, then becoming northeast 20 to 30 mph with gusts to 45 mph Friday afternoon and evening with isolated stronger gusts. * HUMIDITY...Falling Thursday night with lowest daytime humidity on Friday and Saturday 8 to 12 percent. * TIMING...Strongest winds Thursday night and Friday. * OUTLOOK...Weaker winds continue into Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Gregoria
788 WWUS86 KSGX 261130 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 330 AM PST Thu Nov 26 2020 CAZ248-255>257-265-554-262245- /O.CON.KSGX.FW.W.0006.201126T2200Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 330 AM PST Thu Nov 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM PST FRIDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND VALLEYS OF SOUTHWESTERN SAN BERNARDINO AND WESTERN RIVERSIDE COUNTIES...AND INLAND ORANGE COUNTY INCLUDING THE SANTA ANA MOUNTAINS... * WIND...Northeast 25 to 36 mph with gusts to 55 mph. Isolated gusts to 65 mph. Winds gradually diminishing on Friday. * HUMIDITY...Falling to 10 to 15 percent today and 8 to 12 percent Friday and Saturday with poor overnight recovery. * TIMING...The strongest winds are expected from late this afternoon into Friday morning. * OUTLOOK...Much weaker winds for Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. Use extreme caution with potential fire ignition sources. Residents are urged to assemble their emergency supply kit. 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 can contribute to extreme fire behavior. && $$ CAZ250-258-262245- /O.CON.KSGX.FW.W.0006.201127T0500Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 330 AM PST Thu Nov 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM PST SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 15 to 25 mph with gusts to 40 mph with isolated stronger gusts. * HUMIDITY...Falling tonight with lowest daytime humidity on Friday and Saturday of 10 to 15 percent. * TIMING...Strongest winds tonight and Friday. * OUTLOOK...Weaker winds will continue into Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ 17
116 WWUS86 KSGX 262201 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 201 PM PST Thu Nov 26 2020 CAZ248-255>257-265-554-270615- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 201 PM PST Thu Nov 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PST FRIDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND VALLEYS OF SOUTHWESTERN SAN BERNARDINO AND WESTERN RIVERSIDE COUNTIES...AND INLAND ORANGE COUNTY INCLUDING THE SANTA ANA MOUNTAINS... * WIND...Northeast 30 to 40 mph with gusts to 65 mph. Isolated gusts to 75 mph. Winds gradually diminishing on Friday. * HUMIDITY...Falling to 10 to 15 percent today and 8 to 12 percent Friday and Saturday with poor overnight recovery. * TIMING...The strongest winds are expected from late this afternoon into Friday morning. * OUTLOOK...Much weaker winds for Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. Use extreme caution with potential fire ignition sources. Residents are urged to assemble their emergency supply kit. 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 can contribute to extreme fire behavior. && $$ CAZ250-258-270615- /O.CON.KSGX.FW.W.0006.201127T0500Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 201 PM PST Thu Nov 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 9 AM PST SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 20 to 30 mph with gusts to 50 mph with isolated stronger gusts. * HUMIDITY...Falling tonight with lowest daytime humidity on Friday and Saturday of 10 to 15 percent. * TIMING...Strongest winds tonight and Friday. * OUTLOOK...Weaker winds will continue into Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ 10
565 WWUS86 KSGX 270548 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 948 PM PST Thu Nov 26 2020 CAZ248-255>257-265-554-271400- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 948 PM PST Thu Nov 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PST FRIDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND VALLEYS OF SOUTHWESTERN SAN BERNARDINO AND WESTERN RIVERSIDE COUNTIES... AND INLAND ORANGE COUNTY INCLUDING THE SANTA ANA MOUNTAINS... * WIND...Northeast 30 to 40 mph with gusts to 65 mph. Isolated gusts to 75 mph. Winds gradually diminishing on Friday. * HUMIDITY...Minimum of 8 to 12 percent Friday and Saturday with poor overnight recovery. * TIMING...The strongest winds are expected overnight into early Friday morning. * OUTLOOK...Much weaker winds Saturday through Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. Use extreme caution with potential fire ignition sources. Residents are urged to assemble their emergency supply kit. 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 can contribute to extreme fire behavior. && $$ CAZ250-258-271400- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 948 PM PST Thu Nov 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 AM PST SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 20 to 30 mph with gusts to 50 mph with isolated stronger gusts. * HUMIDITY...Falling tonight with lowest daytime humidity on Friday and Saturday of 10 to 15 percent. * TIMING...Strongest winds tonight and Friday. * OUTLOOK...Weaker winds will occur Saturday and continue Sunday and Monday. A slow recovery in humidity for inland areas could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Maxwell
840 WWUS86 KSGX 271048 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 248 AM PST Fri Nov 27 2020 CAZ248-255>257-265-554-272230- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 248 AM PST Fri Nov 27 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND VALLEYS OF SOUTHWESTERN SAN BERNARDINO AND WESTERN RIVERSIDE COUNTIES... AND INLAND ORANGE COUNTY INCLUDING THE SANTA ANA MOUNTAINS... * WIND...Northeast 20 to 30 mph with gusts to 55 mph. Isolated gusts to 70 mph. Winds gradually diminishing from late morning through the afternoon. * HUMIDITY...Lowest humidity of 8 to 12 percent. * TIMING...The strongest winds are expected early this morning for a few hours past sunrise. * OUTLOOK...Gusty northeast winds will be weaker and more localized each day for Saturday through Monday. A slow recovery in humidity could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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 can contribute to extreme fire behavior. && $$ CAZ250-258-272230- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 248 AM PST Fri Nov 27 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 AM PST SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 20 to 30 mph with gusts to 50 mph with isolated stronger gusts. * HUMIDITY...Lowest daytime humidity of 8 to 12 percent with poor overnight recovery. * TIMING...The strongest winds are expected today. * OUTLOOK...Gusty northeast winds will be weaker and more localized each day for Saturday through Monday. A slow recovery in humidity could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ 17
202 WWUS86 KSGX 272130 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 130 PM PST Fri Nov 27 2020 CAZ248-255>257-265-554-280200- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 130 PM PST Fri Nov 27 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND VALLEYS OF SOUTHWESTERN SAN BERNARDINO AND WESTERN RIVERSIDE COUNTIES... AND INLAND ORANGE COUNTY INCLUDING THE SANTA ANA MOUNTAINS... * WIND...Northeast 20 to 30 mph with gusts 40 to 50 mph. Isolated gusts to 60 mph. Winds gradually diminishing through the afternoon. * HUMIDITY...Lowest humidity of 4 to 8 percent. * TIMING...Through 6 PM this evening * OUTLOOK...Gusty northeast winds will be weaker and more localized each day for Saturday through Monday. A slow recovery in humidity could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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 can contribute to extreme fire behavior. && $$ CAZ250-258-280600- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 130 PM PST Fri Nov 27 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 AM PST SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 20 to 30 mph with gusts to 45 mph with isolated gusts to 55 mph on wind-favored coastal slopes. * HUMIDITY...Lowest daytime humidity of 4 to 8 percent with poor overnight recovery. * TIMING...Through 9 AM Saturday morning. * OUTLOOK...Gusty northeast winds will be weaker and more localized after Saturday morning. A slow recovery in humidity could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ 10
644 WWUS86 KSGX 280202 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 602 PM PST Fri Nov 27 2020 CAZ248-255>257-265-554-280315- /O.EXP.KSGX.FW.W.0006.000000T0000Z-201128T0200Z/ San Bernardino and Riverside County Valleys - The Inland Empire- 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 Gorgonio Pass Near Banning-Orange County Inland Areas- 602 PM PST Fri Nov 27 2020 ...RED FLAG WARNING WILL EXPIRE AT 6 PM PST THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND VALLEYS OF SOUTHWESTERN SAN BERNARDINO AND WESTERN RIVERSIDE COUNTIES... AND INLAND ORANGE COUNTY INCLUDING THE SANTA ANA MOUNTAINS... Some gusty winds will continue tonight, locally over 25 MPH, but the winds will be much more localized than earlier today. Low humidity will continue the rest of the weekend and produce somewhat elevated fire weather conditions, versus the critical conditions earlier today. $$ CAZ250-258-281015- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 602 PM PST Fri Nov 27 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 AM PST SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 20 to 30 mph with gusts to 45 mph with isolated gusts to 55 mph on wind-favored coastal slopes. * HUMIDITY...Lowest daytime humidity of 4 to 8 percent with poor overnight recovery, with humidity remaining below 25 percent in many locations. * TIMING...Through 9 AM Saturday morning. * OUTLOOK...Gusty northeast winds will be weaker and more localized after Saturday morning. A slow recovery in humidity could begin on Monday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Maxwell
421 WWUS86 KSGX 281034 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 234 AM PST Sat Nov 28 2020 CAZ250-258-281700- /O.CON.KSGX.FW.W.0006.000000T0000Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 234 AM PST Sat Nov 28 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... * WIND...Northeast 15 to 25 mph with gusts 35 to 45 mph. * HUMIDITY...10 to 15 percent. * TIMING...Through 9 AM this morning. * OUTLOOK...Weak offshore flow and low humidity will maintain elevated fire weather conditions into early next week. Another Santa Ana and critical fire weather conditions possible towards the middle of next week. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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 can contribute to extreme fire behavior. && $$ SS
488 WWUS86 KSGX 281649 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 849 AM PST Sat Nov 28 2020 CAZ250-258-281800- /O.EXP.KSGX.FW.W.0006.000000T0000Z-201128T1700Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 849 AM PST Sat Nov 28 2020 ...RED FLAG WARNING WILL EXPIRE AT 9 AM PST THIS MORNING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS AND INLAND VALLEYS IN SAN DIEGO COUNTY... Winds have largely diminished across the area, and will continue to diminish this morning. Weaker and more localized offshore winds, as well as low humidity will continue through the weekend and into early next week. $$ Connolly
What forecasters said that day
The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Diego, CA wrote its last area forecast discussion before this red flag warning went out at Nov 25, 10:10 AM PST, 3 hours 15 minutes earlier.
Area forecast discussion, Nov 25, 10:10 AM PST, 3 hours 15 minutes before
Area Forecast Discussion
National Weather Service San Diego CA
1010 AM PST Wed Nov 25 2020
.SYNOPSIS...
Skies will be generally sunny in the inland areas today with
temperatures near their seasonal norms. Areas of low clouds over the
coastal areas will spread into the valleys tonight ahead of a trough
of low pressure moving across the Great Basin. After the trough
passes, gusty Santa Ana winds will move into the region Thursday and
Friday. Skies will be clear over the weekend with warm days and cool
night.
&&
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
Skies were generally clear this morning except for scattered to
broken low clouds over coastal Orange County. Pressure gradients
were weakly offshore early today but will trend onshore this
afternoon ahead of a trough over the Pacific Northwest that will
move across the Great Basin Thursday. This is a pattern where the
low clouds over the coastal waters will push into the coastal zones
during the day, then spread into the western valleys overnight.
Skies will clear in the Inland Empire early Thursday morning as the
dry northerly flow kicks behind the passage of the trof axis. Skies
will clear more slowly in San Diego County as the dry offshore will
be slower to reach that area.
Santa Ana winds surface in the San Bernardino County mountains late
tonight, then move down the slopes into the Inland Empire and the
Santa Ana mountains through midday. Strongest winds arrive late
Thursday afternoon and continue through early Friday morning in
these areas. The ECMWF ensemble projects 60 mph wind gusts at
Fremont Canyon in the foothills of the Santa Ana Mountains.
Projected gusts at Ontario is 32 mph with the NBM.
The winds arrive later in San Diego County in this northerly flow
event, reaching the San Diego County mountains and foothills
Thursday evening through Friday morning. The winds will not be as
strong as they will be farther north, with wind gusts from 40 to 50
mph in the mountains and foothills Friday morning. While the winds
will not be as strong, the ensembles show moderate strength easterly
winds persisting longer in San Diego County, continuing into
Saturday.
Temperatures: Northerly flow will draw in a cool High Desert airmass
into SoCal Thursday, so Thanksgiving will be a cool day in most
areas. The coldest areas will be the High Deserts (highs in the mid
50s) and the San Bernardino Mountains (highs 35-45). The warmest
areas will be inland Orange County where the offshore flow will push
highs into the low 70s. The Lower Deserts will also see highs in the
low 70s. Friday will be a warmer day in all areas, with the most
significant warming west of the mountains from the Santa Ana
downslope flow. Both Saturday and Sunday will be sunny and warmer.
*From previous discussion*
A low pressure system that may move inland into northern
California Monday night and into the Great Basin Tuesday could
bring some cooling to southern California depending on how much it
strengthens the onshore flow across southern California. The
coast should begin to cool, but how much and how far inland the
cooling extends inland for Tuesday and Wednesday is less certain.
Patchy night and morning coastal low clouds and fog could return
near the coast some time the early to middle part of next week.
&&
.AVIATION...
251630Z...Coast/Valleys...Very isolated patches of low clouds remain
across the coast, though FEW-SCT conditions should be seen across
all areas by 18z. Bases 1000-1300 FT MSL. BKN-OVC to redevelop after
03z Thu across the coast and then spread inland. Bases 2000-3000 FT
MSL, extending 15-20 mi inland.
Mountains and Deserts...Mostly clear with unrestricted vis through
Wed evening. BKN-OVC with bases 2000-2500 FT AGL to develop 08-10z
Thu.
&&
.MARINE...
No hazardous marine weather through Thu afternoon. Gusty northeast
winds in excess of 20 kt may develop over portions of the coastal
waters at times Thu evening through Fri morning.
&&
.FIRE WEATHER...
The only changes to the Fire Weather Forecast today will be the
planned upgrade from the Fire Weather Watch to a Red Flag Warning
this afternoon. Aside from minor changes to the strength and timing
of the winds, the overall forecast is on track.
Northerly winds will surface in the San Bernardino County mountains
tonight and then spread downslope into the Inland Empire and into
the Santa Ana mountains Thursday. The strongest winds will arrive
Thursday evening through Friday morning with gusts to 60 mph. This
will be the period of greatest concern for rapid fire spread of any
fires that do start. Weaker winds are forecast Saturday.
In San Diego County the northerly flow pattern will delay the onset
of the winds until late Thursday afternoon or evening, with a period
of gusty northeast winds Thursday night into Friday with gusts from
40-50 mph. Another round of slightly weaker winds follows on
Saturday.
Lowest humidity on Thursday afternoon will fall to 10-20% for
Orange, western Riverside, and southwestern San Bernardino Counties,
followed by lower RH of 8-12% Friday. This drier air will spread
south into San Diego County Thursday night and Friday.
Weaker winds may continue into Sunday and Monday. Little recovery
in humidity for inland areas is expected on Sunday. On Monday, a
recovery in humidity near the coast could begin to spread inland
for Monday and Tuesday.
&&
.SKYWARN...
Skywarn activation will not be needed today.
&&
.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Fire Weather Watch from Thursday evening through Saturday
afternoon for San Diego County Inland Valleys-San Diego
County Mountains-Including The Palomar And Descanso Ranger
Districts of the Cleveland National Forest.
Fire Weather Watch from Thursday afternoon through Friday
evening for Orange County Inland Areas-Riverside County
Mountains-Including The San Jacinto Ranger District Of The
San Bernardino National Forest-San Bernardino County
Mountains-Including The Mountain Top And Front Country
Ranger Districts Of The San Bernardino National Forest-San
Bernardino and Riverside County Valleys -The Inland Empire-
San Gorgonio Pass Near Banning-Santa Ana Mountains-
Including The Trabuco Ranger District of the Cleveland
National Forest.
PZ...NONE.
&&
PUBLIC/FIRE WEATHER...Moede/17
AVIATION/MARINE...SchenkNearby
Red Flag Warnings in California, 2020Every red flag warning in 2020
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.