Alert archive / California / Red Flag Warnings in 2017
Red Flag Warning 7, NWS San Diego, CA
NWS San Diego, CA issued this red flag warning at Dec 15, 2017, 12:41 PM PST for 4 counties in California. It took effect at Dec 17, 2017, 8:00 AM PST. It was in force for 12 hr. 1 report 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
- Dec 15, 2017, 12:41 PM PST (20:41 UTC)
- In effect from
- Dec 17, 2017, 8:00 AM PST
- Expired
- Dec 17, 2017, 8:00 PM PST
- In force
- 12 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 20:41 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 |
|---|---|---|---|
| Dec 17, 10:51 AM PST | NON-TSTM WND GST 67 | 6 Ene Tustin Foothills, CA | MESONET STATION FRCC1, FREMONT CANYON. |
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, 8.7 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
- 4905 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
231 WWUS86 KSGX 152041 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 1241 PM PST Fri Dec 15 2017 ...RED FLAG WARNING IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR LOW HUMIDITY AND GUSTY OFFSHORE WINDS FOR PORTIONS OF SAN BERNARDINO...RIVERSIDE AND ORANGE COUNTIES... ...FIRE WEATHER WATCH NOW IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR STRONG WINDS AND LOW HUMIDITY FOR PORTIONS OF SAN DIEGO COUNTY... .Gusty northeasterly winds will redevelop late Saturday night through Sunday evening across portions of San Bernardino, Riverside and Orange Counties, with low relative humidity pushing in Sunday morning. Gusts around 55 mph are expected in the usual windy locations with possible isolated gusts near 70 mph. A Red Flag Warning has been issued for 8 AM through 8 PM Sunday for those locations. San Diego County may not see as strong of winds or very low humidity with this event, however there is still time for them to increase over the next day or so for Sunday. Therefore, San Diego valleys and mountains remain in a Fire Weather Watch from 8 AM to 8 PM Sunday. CAZ248-255>257-265-554-160600- /O.UPG.KSGX.FW.A.0006.171217T0900Z-171218T0400Z/ /O.NEW.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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- 1241 PM PST Fri Dec 15 2017 ...RED FLAG WARNING IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR LOW HUMIDITY AND GUSTY OFFSHORE WINDS... The National Weather Service in San Diego has issued a a Red Flag Warning...which is in effect from 8 AM to 8 PM PST Sunday. The Fire Weather Watch is no longer in effect. * WIND...Northeast 20 to 30 mph with gusts to 55 mph Saturday night through Sunday evening. Isolated gusts near 70 mph on remote coastal slopes and through wind-prone canyons. * HUMIDITY...Minimum 10 to 15 percent Sunday morning through Sunday evening. * TIMING...8 AM through 8 PM Sunday. * OUTLOOK...Winds will weaken Sunday night. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. * WIND IMPACTS...Hazardous driving conditions for high profile vehicles. Specific freeways that may be impacted include interstates 5, 405, 10, 215, and 15. Blowing dust or sand may locally reduce visibility to 1 mile. Debris on roadways and falling tree branches possible. 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 heat can contribute to extreme fire behavior. && $$ CAZ552-160600- /O.NEW.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ Orange County Coastal Areas- 1241 PM PST Fri Dec 15 2017 ...RED FLAG WARNING IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR LOW HUMIDITY AND GUSTY OFFSHORE WINDS... The National Weather Service in San Diego has issued a a Red Flag Warning...which is in effect from 8 AM to 8 PM PST Sunday. * LOCATION...Between Huntington Beach and the San Diego County border. * WIND...Northeast 15 to 25 mph, with gusts around 35 mph. * HUMIDITY...Around 15 percent * TIMING...8 AM through 8 PM Sunday. * OUTLOOK...Winds will weaken Sunday night. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ CAZ250-258-160600- /O.EXT.KSGX.FW.A.0006.171217T1600Z-171218T0400Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 1241 PM PST Fri Dec 15 2017 ...FIRE WEATHER WATCH NOW IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR STRONG WINDS AND LOW HUMIDITY... * LOCATION...Mainly along the coastal mountain slopes, extending into the adjacent valley areas in northern San Diego County. * WIND...East to northeast 15 to 25 mph with gusts to 35 mph. * HUMIDITY...15-20 percent. * TIMING...8 AM through 8 PM Sunday. * OUTLOOK...Winds will weaken Sunday night. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. 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. && $$ JJT
8 follow-up statements
623 WWUS86 KSGX 160556 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 956 PM PST Fri Dec 15 2017 ...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO...RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST SUNDAY... ...FIRE WEATHER WATCH IN EFFECT FOR PORTIONS OF SAN DIEGO COUNTY FROM 8 AM TO 8 PM PST SUNDAY... .Gusty northeasterly winds will return Saturday night through Sunday evening across portions of San Bernardino, Riverside and Orange Counties, with low relative humidity pushing in Sunday morning. Gusts around 55 mph are expected in the usual windy locations with isolated gusts near 70 mph at Pleasants Peak and Fremont Canyon. A Red Flag Warning is in effect from 8 AM through 8 PM Sunday for those locations. In San Diego County a Fire Weather Watch is in effect for the valleys and mountains from 8 AM to 8 PM Sunday. CAZ248-255>257-265-552-554-161400- /O.CON.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 956 PM PST Fri Dec 15 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR LOW HUMIDITY AND GUSTY OFFSHORE WINDS... * WIND...Northeast 20 to 30 mph with gusts to 55 mph Saturday night through Sunday evening. Isolated gusts near 70 mph on remote coastal slopes and through wind-prone canyons. * HUMIDITY...Minimum 10 to 15 percent Sunday morning through Sunday evening. * TIMING...8 AM through 8 PM Sunday. * OUTLOOK...Winds will weaken Sunday night. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. * WIND IMPACTS...Hazardous driving conditions for high profile vehicles. Specific freeways that may be impacted include interstates 5, 405, 10, 215, and 15. Blowing dust or sand may locally reduce visibility to 1 mile. Debris on roadways and falling tree branches possible. 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 heat can contribute to extreme fire behavior. && $$ CAZ250-258-161400- /O.CON.KSGX.FW.A.0006.171217T1600Z-171218T0400Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 956 PM PST Fri Dec 15 2017 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR STRONG WINDS AND LOW HUMIDITY... * LOCATION...Mainly along the coastal mountain slopes, extending into the adjacent valley areas in northern San Diego County. * WIND...East to northeast 15 to 25 mph with gusts to 35 mph. * HUMIDITY...15-20 percent. * TIMING...8 AM through 8 PM Sunday. * OUTLOOK...Winds will weaken Sunday night. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. 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. && $$ Moede
581 WWUS86 KSGX 161131 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 331 AM PST Sat Dec 16 2017 ...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO... RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST SUNDAY... ...FIRE WEATHER WATCH IN EFFECT FOR PORTIONS OF SAN DIEGO COUNTY FROM 8 AM TO 8 PM PST SUNDAY... .Surface high pressure over the Great Basin will bring a period of offshore flow for late tonight into Monday. Gusty north to northeast winds will strengthen for late tonight across portions of San Bernardino...Riverside...and Orange Counties and spread southward into San Diego County on Sunday. The strongest winds are expected across portions of San Bernardino...Riverside...and Orange Counties for late tonight through Sunday morning with lowest humidities for late Sunday morning through Sunday afternoon. CAZ248-255>257-265-552-554-162230- /O.CON.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 331 AM PST Sat Dec 16 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITIES... * WIND...Areas of north to northeast winds 20 to 30 mph with gusts to 50 mph for late tonight through Sunday morning...decreasing Sunday afternoon and evening. Isolated gusts to 60 mph. * LOCATION...Strongest winds along coastal mountain slopes and below passes and canyons. Lowest humidities along coastal mountain slopes...and in the Inland Empire and inland Orange County. * HUMIDITY...Lowest daytime humidities of 10 to 15 percent. * TIMING...Strongest winds from late Saturday night through Sunday morning with lowest humidities for late Sunday morning through Sunday afternoon. * OUTLOOK...Winds will weaken for Sunday night and Monday. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. * WIND IMPACTS...Hazardous driving conditions for high profile vehicles. Blowing dust may locally reduce visibility below one mile at times. Debris on roadways and falling tree branches are possible. 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 heat can contribute to extreme fire behavior. && $$ CAZ250-258-162230- /O.CON.KSGX.FW.A.0006.171217T1600Z-171218T0400Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 331 AM PST Sat Dec 16 2017 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITIES... * WIND...Areas of northeast winds 15 to 25 mph with gusts to 35 mph for Sunday. Isolated gusts to 45 mph. * LOCATION...Strongest winds along coastal mountain slopes into the inland valleys. Lowest humidities along coastal mountain slopes into the valleys. * HUMIDITY...Lowest daytime humidities of 10 to 15 percent. * TIMING...Strongest winds on Sunday with lowest humidities for late Sunday morning through Sunday afternoon. * OUTLOOK...Winds will weaken for Sunday night and Monday. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. 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. && $$ 17
106 WWUS86 KSGX 161955 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 1155 AM PST Sat Dec 16 2017 ...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO... RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST SUNDAY... ...FIRE WEATHER WATCH IN EFFECT FOR PORTIONS OF SAN DIEGO COUNTY FROM 8 AM TO 8 PM PST SUNDAY... .Surface high pressure over the Great Basin will bring a period of offshore flow for late tonight into Monday. Gusty north to northeast winds will strengthen for late tonight across portions of San Bernardino...Riverside...and Orange Counties and spread southward into San Diego County on Sunday. The strongest winds are expected across portions of San Bernardino...Riverside...and Orange Counties for late tonight through Sunday morning with lowest humidities for late Sunday morning through Sunday afternoon. CAZ250-258-162100- /O.CAN.KSGX.FW.A.0006.171217T1600Z-171218T0400Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 1155 AM PST Sat Dec 16 2017 ...FIRE WEATHER WATCH IS CANCELLED FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR SAN DIEGO COUNTY VALLEYS AND MOUNTAINS... The National Weather Service in San Diego has cancelled the Fire Weather Watch. Relative humidity and wind expectations in San Diego County for Sunday do not meet Red Flag criteria so the Fire Weather Watch has been cancelled. $$ CAZ248-255>257-265-552-554-170600- /O.CON.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 1155 AM PST Sat Dec 16 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF RIVERSIDE, SAN BERNARDINO, AND ORANGE COUNTIES, THE ORANGE COUNTY COASTAL PLAIN, AND INLAND EMPIRE... * WIND...Areas of north to northeast winds 20 to 30 mph with gusts to 50 mph late tonight through Sunday morning...decreasing Sunday afternoon and evening. Isolated gusts to 60 mph. * LOCATION...Strongest winds and lowest humidity along the coastal mountain slopes and below passes and canyons. * HUMIDITY...Lowest 10 to 15 percent. * TIMING...Strongest winds from late Saturday night through Sunday morning with lowest humidity late Sunday morning through Sunday afternoon. * OUTLOOK...Winds will weaken Sunday night and Monday. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. * WIND IMPACTS...Hazardous driving conditions for high profile vehicles. Blowing dust may locally reduce visibility below one mile at times. Debris on roadways and falling tree branches are possible. 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 heat can contribute to extreme fire behavior. && $$ JAD
329 WWUS86 KSGX 162000 CCA RFWSGX URGENT - FIRE WEATHER MESSAGE...CORRECTED National Weather Service San Diego CA 1200 PM PST Sat Dec 16 2017 ...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO... RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST SUNDAY... .Surface high pressure over the Great Basin will bring a period of offshore flow for late tonight into Monday. Gusty north to northeast winds will strengthen for late tonight across portions of San Bernardino...Riverside...and Orange Counties and spread southward into San Diego County on Sunday. The strongest winds are expected across portions of San Bernardino...Riverside...and Orange Counties for late tonight through Sunday morning with lowest humidities for late Sunday morning through Sunday afternoon. CAZ250-258-162100- /O.CAN.KSGX.FW.A.0006.171217T1600Z-171218T0400Z/ San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest- 1200 PM PST Sat Dec 16 2017 ...FIRE WEATHER WATCH IS CANCELLED FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR SAN DIEGO COUNTY VALLEYS AND MOUNTAINS... The National Weather Service in San Diego has cancelled the Fire Weather Watch. Relative humidity and wind expectations in San Diego County for Sunday do not meet Red Flag criteria so the Fire Weather Watch has been cancelled. $$ CAZ248-255>257-265-552-554-170600- /O.CON.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 1200 PM PST Sat Dec 16 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR THE MOUNTAINS OF RIVERSIDE, SAN BERNARDINO, AND ORANGE COUNTIES, THE ORANGE COUNTY COASTAL PLAIN, AND INLAND EMPIRE... * WIND...Areas of north to northeast winds 20 to 30 mph with gusts to 50 mph late tonight through Sunday morning...decreasing Sunday afternoon and evening. Isolated gusts to 60 mph. * LOCATION...Strongest winds and lowest humidity along the coastal mountain slopes and below passes and canyons. * HUMIDITY...Lowest 10 to 15 percent. * TIMING...Strongest winds from late Saturday night through Sunday morning with lowest humidity late Sunday morning through Sunday afternoon. * OUTLOOK...Winds will weaken Sunday night and Monday. * FIRE WEATHER IMPACTS...Any fires that develop will likely spread rapidly and be difficult to contain. Outdoor burning should be avoided. * WIND IMPACTS...Hazardous driving conditions for high profile vehicles. Blowing dust may locally reduce visibility below one mile at times. Debris on roadways and falling tree branches are possible. 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 heat can contribute to extreme fire behavior. && $$ JAD
867 WWUS86 KSGX 170528 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 928 PM PST Sat Dec 16 2017 ...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO... RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST SUNDAY... .Surface high pressure over the Great Basin will bring a period of offshore flow for late tonight into Monday. Gusty north to northeast winds will strengthen late tonight across portions of San Bernardino...Riverside...and Orange Counties. The strongest winds are expected Sunday morning with lowest humidities for late Sunday morning through Sunday afternoon. CAZ248-255>257-265-552-554-171400- /O.CON.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 928 PM PST Sat Dec 16 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 8 PM PST SUNDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR PORTIONS OF SAN BERNARDINO...RIVERSIDE...AND ORANGE COUNTIES... * WIND...Areas of north to northeast winds 20 to 30 mph with gusts to 50 mph late tonight through Sunday morning... decreasing Sunday afternoon and evening. Isolated gusts to 60 mph possible in the wind prone passes and canyons. * LOCATION...Strongest winds through the passes and canyons with lowest humidity in portions of the Inland Empire into Orange County. * HUMIDITY...Around 12 to 15 percent. * TIMING...Strongest winds Sunday morning with lowest humidity late Sunday morning through Sunday afternoon. * OUTLOOK...Winds will weaken Sunday night and Monday. * FIRE WEATHER IMPACTS...Any fires that develop may spread rapidly. * WIND IMPACTS...Hazardous driving conditions for high profile vehicles. Blowing dust may locally reduce visibility below one mile at times. Debris on roadways and falling tree branches are possible. 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 heat can contribute to extreme fire behavior. && $$ SS
582 WWUS86 KSGX 170953 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 153 AM PST Sun Dec 17 2017 ...RED FLAG WARNING IN EFFECT FOR PORTIONS OF SAN BERNARDINO... RIVERSIDE AND ORANGE COUNTIES FROM 8 AM TO 8 PM PST TODAY... .Surface high pressure over the Great Basin will bring periods of stronger and gusty northeast winds along and below coastal mountain slopes through today along with lower humidities. CAZ248-255>257-265-552-554-172230- /O.CON.KSGX.FW.W.0007.171217T1600Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 153 AM PST Sun Dec 17 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 8 PM PST THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITIES FOR LOWER COASTAL MOUNTAIN SLOPES AND ADJACENT VALLEY AND COASTAL AREAS... * WIND...Areas of northeast winds 20 to 30 mph with gusts to 45 mph. Isolated gusts to 55 mph below the Cajon Pass and near the coastal foothills of the Santa Ana Mountains. * LOCATION...Strongest winds along and below coastal mountain slopes and passes and canyons. Lowest humidities in the Inland Empire and inland Orange County. * HUMIDITY...Lowest daytime humidities around 15 percent. * TIMING...Strongest and most widespread winds during the morning with lowest humidities winds Sunday morning with lowest humidities from late morning through the afternoon. * OUTLOOK...Winds will weaken tonight and Monday. * IMPACTS...Any fires that develop may spread rapidly. 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 heat can contribute to extreme fire behavior. && $$ 17
560 WWUS86 KSGX 172055 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 1255 PM PST Sun Dec 17 2017 CAZ248-255>257-265-552-554-180400- /O.CON.KSGX.FW.W.0007.000000T0000Z-171218T0400Z/ San Bernardino and Riverside County Valleys - The Inland Empire- San Bernardino County Mountains- Including The Mountain Top And Front Country Ranger Districts Of The San Bernardino National Forest-Riverside County Mountains- Including The San Jacinto Ranger District Of The San Bernardino National Forest-Santa Ana Mountains- Including The Trabuco Ranger District of the Cleveland National Forest-San Gorgonio Pass Near Banning-Orange County Coastal Areas- Orange County Inland Areas- 1255 PM PST Sun Dec 17 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PST THIS EVENING FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR PORTIONS OF SAN BERNARDINO... RIVERSIDE...AND ORANGE COUNTIES... * WIND...Areas of northeast winds 20 to 30 mph with gusts to 45 mph. Isolated gusts to 55 mph below the Cajon Pass and near the coastal foothills of the Santa Ana Mountains. * LOCATION...Strongest winds along and below coastal mountain slopes and passes and canyons. * HUMIDITY...Lowest near 15 percent. * TIMING...Strongest and most widespread winds midday, slowly subsiding this evening. * OUTLOOK...Light winds on Monday, but daytime relative humidity minimums will be lower, especially in the mountains . * IMPACTS...Any fires that develop may spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and heat can contribute to extreme fire behavior. && $$ jad
137 WWUS86 KSGX 180342 RFWSGX URGENT - FIRE WEATHER MESSAGE National Weather Service San Diego CA 742 PM PST Sun Dec 17 2017 CAZ248-255>257-265-552-554-180445- /O.EXP.KSGX.FW.W.0007.000000T0000Z-171218T0400Z/ 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 Coastal Areas- Orange County Inland Areas- 742 PM PST Sun Dec 17 2017 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PST THIS EVENING... Winds will continue to lessen and humidity will continue to slowly rise. As such, the Red Flag Warning will be allowed to expire at 8 PM PST. $$ Gregoria
Nearby
Red Flag Warnings in California, 2017Every red flag warning in 2017
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.