Alert archive / California / Red Flag Warnings in 2020
Red Flag Warning 2, NWS San Diego, CA
NWS San Diego, CA issued this red flag warning at Sep 7, 2020, 1:09 PM PDT for 4 counties in California. It took effect at Sep 8, 2020, 12:00 PM PDT. It was in force for 32 hr. 3 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
- Sep 7, 2020, 1:09 PM PDT (20:09 UTC)
- In effect from
- Sep 8, 2020, 12:00 PM PDT
- Expired
- Sep 9, 2020, 8:00 PM PDT
- In force
- 32 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 20:15 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 |
|---|---|---|---|
| Sep 9, 1:46 PM PDT | WILDFIRE | 5 W Riverside, CA | 7 ACRE WIND-DRIVEN FIRE OCCURRED IN SANTA ANA RIVERBED. FIRE STARTED AROUND 1:46 PM AT CLAY ST AND GENERAL RD. NORTH WINDS REPORTED AT RIVERSIDE MUNICIPAL AIRPORT WITH SUSTAINED TO 15 MPH AND GUSTING TO 30 MPH AND RELATIVE HUMIDITY AT 6%. |
| Sep 9, 3:43 PM PDT | WILDFIRE | 5 S Hemet, CA | FIRE STARTED AROUND 3:43 PM NEAR 42500 CACTUS VALLEY RD AT THE CACTUS VALLEY RD AND SAGE RD INTERSECTION. AT TIME OF THIS REPORT, APPROXIMATELY 20 ACRES BURNED. IT IS A STRUCTURE FIRE + VEGETATION, WITH ONE STRUCTURE IMPACTED. WINDS REPORTED AT SAGE RAWS SITE |
| Sep 9, 6:00 PM PDT | WILDFIRE | 3 Wnw Forest Falls, CA | EL DORADO FIRE. THE FIRE HAS BEEN BURNING SINCE SEPTEMBER 5. ON SEPTEMBER 9TH DURING THE AFTERNOON IT CROSSED HIGHWAY 38 UNEXPECTEDLY. THE FIRE THEN BURNED AGGRESSIVELY NORTHWARD. THE STATE HIGHWAY IS CLOSED IN BOTH DIRECTIONS. THE FIRE IS 12,610 ACRES AND EVA |
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, 8.2 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
- 2909 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
207 WWUS86 KSGX 072009 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 109 PM PDT Mon Sep 7 2020 CAZ248-250-255>258-265-554-080500- /O.UPG.KSGX.FW.A.0002.200908T2200Z-200910T0300Z/ /O.NEW.KSGX.FW.W.0002.200908T1900Z-200910T0300Z/ 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-San Gorgonio Pass Near Banning- Orange County Inland Areas- 109 PM PDT Mon Sep 7 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TUESDAY TO 8 PM PDT WEDNESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS...INLAND VALLEYS AND INLAND ORANGE COUNTY... The National Weather Service in San Diego has issued a Red Flag Warning...which is in effect from noon Tuesday to 8 PM PDT Wednesday. The Fire Weather Watch is no longer in effect. * WIND...Areas of east to northeast winds 20 to 30 mph with gusts to 45 mph. The strongest winds are expected Tuesday night into Wednesday morning with gusts to 55 mph in the windier locations. * HUMIDITY...Lowest daytime humidity of 5 to 10 percent with poor recovery Tuesday night. * TIMING...Noon Tuesday through 8 PM Wednesday. Strong northeast to east winds will begin earlier in Riverside, San Bernardino and Orange counties, and about 3 hours later in San Diego County. * OUTLOOK...Winds will weaken for Thursday into the weekend with higher coastal humidity spreading gradually inland for Thursday into the weekend. * IMPACTS...Conditions will be favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. && 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. && $$ CAZ260-080500- /O.NEW.KSGX.FW.W.0002.200908T1900Z-200910T0300Z/ Victor Valley-Apple Valley-Lucerne Valley-Johnson Valley- 109 PM PDT Mon Sep 7 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TUESDAY TO 8 PM PDT WEDNESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE DESERTS OF SOUTHWESTERN SAN BERNARDINO COUNTY... The National Weather Service in San Diego has issued a Red Flag Warning...which is in effect from noon Tuesday to 8 PM PDT Wednesday. * WIND...Areas of east to northeast winds 15 to 25 mph with gusts to 45 mph. * HUMIDITY...Lowest daytime humidity of 5 to 10 percent with poor recovery Tuesday night. * TIMING...Noon Tuesday through 8 PM Wednesday. The winds will begin to weaken Wednesday morning but remain gusty as humidity decreases into the afternoon. * OUTLOOK...Winds will weaken for Thursday into the weekend with higher coastal humidity spreading gradually inland for Thursday into the weekend. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
7 follow-up statements
892 WWUS86 KSGX 080432 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 932 PM PDT Mon Sep 7 2020 CAZ248-250-255>258-260-265-554-081245- /O.CON.KSGX.FW.W.0002.200908T1900Z-200910T0300Z/ 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-Victor Valley-Apple Valley- Lucerne Valley-Johnson Valley-San Gorgonio Pass Near Banning- Orange County Inland Areas- 932 PM PDT Mon Sep 7 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TUESDAY TO 8 PM PDT WEDNESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS...HIGH DESERT...INLAND VALLEYS AND INLAND ORANGE COUNTY... * WIND...Areas of east to northeast winds 20 to 30 mph with gusts to 45 mph, gusts up to 55 mph possible in the windiest locations. * HUMIDITY...Lowest daytime humidity of 5 to 10 percent with poor recovery Tuesday night. * TIMING...Noon Tuesday through 8 PM Wednesday. Strong northeast to east winds will begin earlier in Riverside, San Bernardino and Orange counties, and about 3 hours later in San Diego County. * OUTLOOK...Winds will weaken for Thursday into the weekend with higher coastal humidity spreading gradually inland for Thursday into the weekend. * IMPACTS...Conditions will be favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. 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. && $$ Connolly
491 WWUS86 KSGX 081048 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 348 AM PDT Tue Sep 8 2020 CAZ248-250-255>258-260-265-554-082245- /O.CON.KSGX.FW.W.0002.200908T1900Z-200910T0300Z/ 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-Victor Valley-Apple Valley- Lucerne Valley-Johnson Valley-San Gorgonio Pass Near Banning- Orange County Inland Areas- 348 AM PDT Tue Sep 8 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM PDT WEDNESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS...VALLEYS...INLAND ORANGE COUNTY...AND THE APPLE AND LUCERNE VALLEYS... * WIND...Areas of east to northeast winds 20 to 30 mph with gusts to 45 mph, gusts up to 55 mph possible in the windiest locations. The winds for the Apple and Lucerne Valleys will mostly be an issue for this afternoon with the stronger gusts to around 40 mph. * HUMIDITY...Lowest daytime humidity of 5 to 10 percent with poor recovery tonight. * TIMING...Noon today through 8 PM Wednesday. Strong north to northeast winds will begin first in San Bernardino and Orange counties, then spread southward this afternoon and into San Diego County late this afternoon and tonight. * OUTLOOK...Winds will weaken for Thursday into the weekend with higher coastal humidity spreading gradually inland for Thursday into the weekend. * IMPACTS...Conditions will be favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. 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
534 WWUS86 KSGX 082047 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 147 PM PDT Tue Sep 8 2020 CAZ248-250-255>258-260-265-554-090500- /O.CON.KSGX.FW.W.0002.000000T0000Z-200910T0300Z/ 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-Victor Valley-Apple Valley- Lucerne Valley-Johnson Valley-San Gorgonio Pass Near Banning- Orange County Inland Areas- 147 PM PDT Tue Sep 8 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS...VALLEYS... INLAND ORANGE COUNTY...AND THE APPLE AND LUCERNE VALLEYS... * WIND...Areas of east to northeast winds 20 to 30 mph with gusts to 45 mph. Gusts up to 55 mph will be possible in the windiest locations. The winds for the Apple and Lucerne Valleys will mostly be an issue for this afternoon with the stronger gusts to around 40 mph. * HUMIDITY...Lowest daytime humidity of 5 to 10 percent with poor recovery tonight. * TIMING...Through 8 PM Wednesday. Strong north to northeast winds will begin first in San Bernardino and Orange counties, then spread southward this afternoon and into San Diego County late this afternoon and tonight. * OUTLOOK...Winds will weaken for Thursday into the weekend with higher coastal humidity spreading gradually inland for Thursday into the weekend. * IMPACTS...Conditions will be favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. 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. && $$
909 WWUS86 KSGX 090359 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 859 PM PDT Tue Sep 8 2020 Updated to delay the onset of the offshore winds in the inland valleys. CAZ248-250-255>258-260-265-554-091200- /O.CON.KSGX.FW.W.0002.000000T0000Z-200910T0300Z/ 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-Victor Valley-Apple Valley- Lucerne Valley-Johnson Valley-San Gorgonio Pass Near Banning- Orange County Inland Areas- 859 PM PDT Tue Sep 8 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM WEDNESDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS...VALLEYS... INLAND ORANGE COUNTY...AND THE APPLE AND LUCERNE VALLEYS... * WIND...East winds of 15 to 25 mph in the mountains, surfacing in the foothills and inland valleys by daybreak. Gusts from 35 to 45 mph, with peak gusts to 55 mph in the most wind prone locations. * HUMIDITY...Lowest daytime humidity 10 to 15 percent. * TIMING...Through 8 PM Wednesday. Gusty northeast winds will in the mountains tonight, surfacing in the valleys early Wednesday morning through the afternoon. * OUTLOOK...Lighter offshore winds Wednesday night and Thursday. * IMPACTS...Conditions will be favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. && $$ Moede
282 WWUS86 KSGX 091048 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 348 AM PDT Wed Sep 9 2020 CAZ248-250-255>258-260-265-554-092245- /O.CON.KSGX.FW.W.0002.000000T0000Z-200910T0300Z/ 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-Victor Valley-Apple Valley- Lucerne Valley-Johnson Valley-San Gorgonio Pass Near Banning- Orange County Inland Areas- 348 AM PDT Wed Sep 9 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR MOUNTAINS...VALLEYS... INLAND ORANGE COUNTY,,,AND THE APPLE AND LUCERNE VALLEYS... * WIND...Areas of east to northeast winds 20 to 30 mph with gusts to 45 mph. Gusts to 55 mph in the windiest locations. Winds becoming west to southwest in the afternoon with gusts to 25 mph. * HUMIDITY...Lowest daytime humidity of 5 to 10 percent. * TIMING...The strongest winds will be through this morning with humidities recovering during the afternoon and early evening as the sea breeze moves inland. * OUTLOOK...Weaker and more localized gusty northeast to east winds for late tonight into Thursday morning. A good recovery in humidity towards the coast tonight and moderate inland with lowest humidity Thursday afternoon of 5 to 10 percent for the mountains and inland valleys. * IMPACTS...Conditions will be favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. && $$ 17
206 WWUS86 KSGX 091945 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 1245 PM PDT Wed Sep 9 2020 .RED FLAG WARNING CANCELLED FOR SAN DIEGO COUNTY, ORANGE COUNTY, AND HIGH DESERT. .LOCAL NEAR-CRITICAL FIRE WEATHER CONDITIONS CONTINUING THROUGH THIS AFTERNOON. CAZ250-257-258-260-554-092045- /O.CAN.KSGX.FW.W.0002.000000T0000Z-200910T0300Z/ San Diego County Inland Valleys-Santa Ana Mountains- Including The Trabuco Ranger District of the Cleveland National Forest-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest-Victor Valley-Apple Valley- Lucerne Valley-Johnson Valley-Orange County Inland Areas- 1245 PM PDT Wed Sep 9 2020 ...RED FLAG WARNING IS CANCELLED FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR SAN DIEGO COUNTY, ORANGE COUNTY INCLUDING SANTA ANA MOUNTAINS, AND THE HIGH DESERT OF SAN BERNARDINO COUNTY. The National Weather Service in San Diego has cancelled the Red Flag Warning. Winds have largely subsided for these areas. Low relative humidity will persist for inland areas today, with locally breezy conditions maintaining elevated fire weather conditions. $$ CAZ248-255-256-265-100300- /O.CON.KSGX.FW.W.0002.000000T0000Z-200910T0300Z/ 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-San Gorgonio Pass Near Banning- 1245 PM PDT Wed Sep 9 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE INLAND EMPIRE, SAN GORGONIO PASS, AND FOOTHILLS OF THE SAN BERNARDINO AND RIVERSIDE COUNTY MOUNTAINS... * WIND...Areas of east to northeast winds 15 to 25 mph with gusts to 40 mph in the foothills and through passes. Periods of onshore winds from the west gusting up to 15 or 20 mph this afternoon in the Inland Empire. * HUMIDITY...Minimum daytime humidity of 5 to 20 percent. * TIMING...Through this evening. * OUTLOOK...Dry conditions with low daytime humidities of 15-20% will persist through Thursday. Offshore winds will affect foothill location again tonight, but will be relatively weak. * IMPACTS...Near-critical conditions favorable for rapid fire spread and extreme fire behavior. 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 wind...low relative humidity...and heat can contribute to extreme fire behavior. && $$ Rodriguez
500 WWUS86 KSGX 100301 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 801 PM PDT Wed Sep 9 2020 CAZ248-255-256-265-100415- /O.EXP.KSGX.FW.W.0002.000000T0000Z-200910T0300Z/ San Bernardino and Riverside County Valleys - The Inland Empire- San Bernardino County Mountains- Including The Mountain Top And Front Country Ranger Districts Of The San Bernardino National Forest-Riverside County Mountains- Including The San Jacinto Ranger District Of The San Bernardino National Forest-San Gorgonio Pass Near Banning- 801 PM PDT Wed Sep 9 2020 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING... Winds have diminished below warning criteria. $$ Moede
Nearby
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.