Alert archive / Utah / Red Flag Warnings in 2018
Red Flag Warning 26, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Sep 14, 2018, 2:33 PM MDT for 21 counties in Utah. It took effect at Sep 15, 2018, 2:11 AM MDT. It was in force for 43 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 14, 2018, 2:33 PM MDT (20:33 UTC)
- In effect from
- Sep 15, 2018, 2:11 AM MDT
- Expired
- Sep 16, 2018, 9:00 PM MDT
- In force
- 43 hr
- Issued by
- NWS Salt Lake City, UT
All 21 counties
Beaver County, UT, Box Elder County, UT, Cache County, UT, Carbon County, UT, Davis County, UT, Emery County, UT, Garfield County, UT, Iron County, UT, Juab County, UT, Millard County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Sanpete County, UT, Summit County, UT, Tooele County, UT, Utah County, UT, Wasatch County, UT, Washington County, UT, Wayne County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 160 km from the middle of the area, began a volume at 20:37 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 8.6 hours before the alert went out and 102 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
- 3260 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 193 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
549 WWUS85 KSLC 142033 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 233 PM MDT Fri Sep 14 2018 UTZ478-479-492-495-150445- /O.NEW.KSLC.FW.W.0026.180916T1800Z-180917T0300Z/ /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- Color Country West Desert- 233 PM MDT Fri Sep 14 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478... 479...492 AND 495... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479... 492 AND 495... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest gusts near 30 mph today, increasing to gusts up to 50 mph Saturday. Gusts in the 30-40 mph range Sunday redeveloping Sunday afternoon. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains today, with poor overnight recovery. RH should trend a few percent higher Saturday. RH of 10-15% valleys near 15% mountains Sunday. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ498-150445- /O.UPG.KSLC.FW.A.0007.180915T1600Z-180916T0400Z/ /O.NEW.KSLC.FW.W.0025.180915T1600Z-180916T0400Z/ Grand Staircase- 233 PM MDT Fri Sep 14 2018 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest gusts up to 40 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ480-482-484-493-150445- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Uinta Mountains-Western Uintah Basin-Tavaputs Plateau- Central Utah Mountains- 233 PM MDT Fri Sep 14 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 480... 482...484 AND 493... * AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 Tavaputs Plateau and Fire Weather Zone 493 Central Utah Mountains. * WINDS...Southwest gusts near 30 mph today, increasing to gusts up to 50 mph Saturday. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains today, with poor overnight recovery. RH should trend a few percent higher Saturday. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ483-488-489-497-150445- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Southern Ashley National Forest-Manti National Forest- San Rafael Swell-Mojave Desert- 233 PM MDT Fri Sep 14 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 483... 488...489 AND 497... * AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National Forest...Fire Weather Zone 488 Manti National Forest...Fire Weather Zone 489 San Rafael Swell and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest gusts up to 40 mph. Strongest Saturday afternoon. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% today, with poor overnight recovery. RH should trend a few percent higher Saturday. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ481-150400- /O.CON.KSLC.FW.W.0024.000000T0000Z-180915T0400Z/ Western Ashley National Forest- 233 PM MDT Fri Sep 14 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 481... * AFFECTED AREA...Fire Weather Zone 481 Western Ashley National Forest. * WINDS...Southwest gusts up to 40 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
7 follow-up statements
202 WWUS85 KSLC 150811 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 211 AM MDT Sat Sep 15 2018 UTZ478-479-492-495-152300- /O.CAN.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ /O.EXT.KSLC.FW.W.0026.180915T0811Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- Color Country West Desert- 211 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479... 492 AND 495... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest gusts between 45-55 mph today, and 35-45 mph Sunday. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ494-152300- /O.EXA.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Henry Mountains- 211 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 494... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 10 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ480-482-484-493-152300- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Uinta Mountains-Western Uintah Basin-Tavaputs Plateau- Central Utah Mountains- 211 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 480...482...484 AND 493... * AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 Tavaputs Plateau and Fire Weather Zone 493 Central Utah Mountains. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ483-488-489-497-152300- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Southern Ashley National Forest-Manti National Forest- San Rafael Swell-Mojave Desert- 211 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 483...488...489 AND 497... * AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National Forest...Fire Weather Zone 488 Manti National Forest...Fire Weather Zone 489 San Rafael Swell and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ498-152300- /O.CON.KSLC.FW.W.0025.180915T1600Z-180916T0400Z/ Grand Staircase- 211 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498... * AFFECTED AREA...Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
317 WWUS85 KSLC 151748 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1148 AM MDT Sat Sep 15 2018 UTZ481-160200- /O.NEW.KSLC.FW.W.0027.180915T1748Z-180916T0400Z/ Western Ashley National Forest- 1148 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 481... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 10 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 481 Western Ashley National Forest. * WINDS...Southwest gusts between 30-40 mph. * RELATIVE HUMIDITY...Afternoon minimum RH as low as 10-15%. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ480-482-484-493-160200- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Uinta Mountains-Western Uintah Basin-Tavaputs Plateau- Central Utah Mountains- 1148 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 480...482...484 AND 493... * AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 Tavaputs Plateau and Fire Weather Zone 493 Central Utah Mountains. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ483-488-489-494-497-160200- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Southern Ashley National Forest-Manti National Forest- San Rafael Swell-Henry Mountains-Mojave Desert- 1148 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 483...488...489...494 AND 497... * AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National Forest...Fire Weather Zone 488 Manti National Forest...Fire Weather Zone 489 San Rafael Swell...Fire Weather Zone 494 Henry Mountains and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ498-160200- /O.CON.KSLC.FW.W.0025.000000T0000Z-180916T0400Z/ Grand Staircase- 1148 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498... * AFFECTED AREA...Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ478-479-492-495-160200- /O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- Color Country West Desert- 1148 AM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479... 492 AND 495... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest gusts between 45-55 mph today, and 35-45 mph Sunday. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
641 WWUS85 KSLC 152217 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 417 PM MDT Sat Sep 15 2018 UTZ480-482-484-493-160400- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Uinta Mountains-Western Uintah Basin-Tavaputs Plateau- Central Utah Mountains- 417 PM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 480...482...484 AND 493... * AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 Tavaputs Plateau and Fire Weather Zone 493 Central Utah Mountains. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ481-160400- /O.CON.KSLC.FW.W.0027.000000T0000Z-180916T0400Z/ Western Ashley National Forest- 417 PM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 481... * AFFECTED AREA...Fire Weather Zone 481 Western Ashley National Forest. * WINDS...Southwest gusts between 30-40 mph. * RELATIVE HUMIDITY...Afternoon minimum RH as low as 10-15%. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ483-488-489-494-497-160400- /O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/ Southern Ashley National Forest-Manti National Forest- San Rafael Swell-Henry Mountains-Mojave Desert- 417 PM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 483...488...489...494 AND 497... * AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National Forest...Fire Weather Zone 488 Manti National Forest...Fire Weather Zone 489 San Rafael Swell...Fire Weather Zone 494 Henry Mountains and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ498-160400- /O.CON.KSLC.FW.W.0025.000000T0000Z-180916T0400Z/ Grand Staircase- 417 PM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498... * AFFECTED AREA...Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest gusts between 35-45 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ478-479-492-495-160600- /O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- Color Country West Desert- 417 PM MDT Sat Sep 15 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479... 492 AND 495... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest gusts between 45-55 mph today, and 35-45 mph Sunday. * RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 10-15% mountains, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
478 WWUS85 KSLC 160857 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 257 AM MDT Sun Sep 16 2018 UTZ478-479-492-495-162300- /O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- Color Country West Desert- 257 AM MDT Sun Sep 16 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478... 479...492 AND 495... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest gusts between 30-40 mph. * RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor overnight recovery. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
511 WWUS85 KSLC 161407 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 807 AM MDT Sun Sep 16 2018 UTZ489-494-170000- /O.EXA.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ San Rafael Swell-Henry Mountains- 807 AM MDT Sun Sep 16 2018 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489 AND 494... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 9 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell and Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ478-479-492-495-170000- /O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- Color Country West Desert- 807 AM MDT Sun Sep 16 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478... 479...492 AND 495... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
300 WWUS85 KSLC 162036 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 236 PM MDT Sun Sep 16 2018 UTZ492-495-170300- /O.NEW.KSLC.FW.A.0008.180918T1800Z-180919T0300Z/ /O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Central Utah West Desert-Color Country West Desert- 236 PM MDT Sun Sep 16 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... ...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... The National Weather Service in Salt Lake City has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Tuesday afternoon through Tuesday evening. A red flag warning remains in effect for the area through 9 PM Sunday evening. * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...South 15 to 25 mph with gusts up to 45 mph through this evening. Locally gusty winds are possible Monday afternoon and evening. Another round of southerly winds 15 to 25 mph with gusts to 35 mph are possible Tuesday afternoon and evening. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that there is a potential for critical fire weather conditions. Continue to monitor for the latest forecasts and for possible Red Flag Warnings. && $$ UTZ478-479-489-494-170300- /O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-San Rafael Swell- Henry Mountains- 236 PM MDT Sun Sep 16 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478... 479...489 AND 494... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains...Fire Weather Zone 489 San Rafael Swell and Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest 10 to 20 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop will have the potential to 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 are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
091 WWUS85 KSLC 170300 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 900 PM MDT Sun Sep 16 2018 UTZ492-495-171200- /O.EXP.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ /O.CON.KSLC.FW.A.0008.180918T1800Z-180919T0300Z/ Central Utah West Desert-Color Country West Desert- 900 PM MDT Sun Sep 16 2018 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...South 15 to 25 mph with gusts up to 45 mph through this evening. Locally gusty winds are possible Monday afternoon and evening. Another round of southerly winds 15 to 25 mph with gusts to 35 mph are possible Tuesday afternoon and evening. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that there is a potential for critical fire weather conditions. Continue to monitor for the latest forecasts and for possible Red Flag Warnings. && $$ UTZ478-479-489-494-170400- /O.EXP.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/ Salt Lake Desert-Wasatch Mountains-San Rafael Swell- Henry Mountains- 900 PM MDT Sun Sep 16 2018 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479... 489 AND 494... Decreasing winds overnight are not expected to increase back to hazardous levels for fire weather concerns Monday. $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
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 Salt Lake City, UT wrote its last area forecast discussion before this red flag warning went out at Sep 14, 9:57 AM MDT, 4 hours 36 minutes earlier.
Area forecast discussion, Sep 14, 9:57 AM MDT, 4 hours 36 minutes before
Area Forecast Discussion
National Weather Service Salt Lake City UT
957 AM MDT Fri Sep 14 2018
.SYNOPSIS....A warm, dry, and breezy southwest flow will persist
through the weekend and into early next week.
&&
.DISCUSSION...The amplified long wave trough oriented along the
west coast (notable in H5 analysis) coupled with high pressure
over the southern plains continues to drive enhanced southwesterly
flow aloft across the eastern Great Basin today. The trough is
currently in the process of reloading as a short wave noted near
35N/135W is showing signs of kicking downstream as the next short
wave embedded deepens off the BritCol coast. Downstream
translation of the former will be the primary focus in the short
term period as it remains poised to progressively lift northeast
across Nevada and into Idaho Saturday.
In advance of this, do expect subtle height rises across northern
portions of the area today, and further weakening of the S-N MSLP
gradient across the western valleys as the surface trough over
northwestern Utah is poised to largely wash out. Though still
breezy, the winds across the western valleys/mtns will be a bit
lower this afternoon vs 24 hrs previous. A temporary reduction at
best.
Will be keying in on a resultant uptick of winds/temps in advance
of the kicking trough for tomorrow. Redevelopment and
strengthening of the surface trough across the northwest and a
rapid increase of H7 flow look likely to produce advisory level
winds across the west desert, while further enhancing fire weather
concerns areawide.
Going forecast remains on track. No updates needed this morning.
PREVIOUS DISCUSSION...The approaching wave also draws up moisture
into Utah from Arizona Saturday. This trend continues Sunday as
ridging develops south of the Four corners.
SREF guidance shows enough destabilization to potentially support
convection Saturday and especially Sunday. However, flow is quite
strong and would inhibit terrain circulations. Kept PoPs below
mentionable levels for now.
Another period of potential precipitation is Saturday night
across the north as the wave lifts into Idaho. Height falls and
cooling aloft are maximized during this period. However, not
enough in the guidance to mention precipitation at this point.
The EC and GFS remain in good agreement through Wednesday with a
dry and warm southwest flow prevailing. Wednesday will likely be a
windy day as both models show the trough ejecting eastward.
However, the EC brings the longwave in its entirety across Utah
while the GFS ejects a portion of the trough NE into the Northern
Rockies as energy drops southward into the western portion of the
longwave trough. The EC solution is a few degrees cooler than the
GFS by Thursday as the 700mb is west northwest, while the GFS is
developing another trough along the west coast which will cause
the 700mb winds to turn southwest and increase already. Have
played middle of the road approach beyond Wednesday as both
scenarios have support, although believe the GFS warrants more
support based on recent weather pattern.
&&
.AVIATION...The winds at the KSLC terminal should become southerly
shortly with periodic gusts up to 20 kts possible this afternoon. A
northern shift is expected between 19-21Z, however, there is a 40%
chance of the winds remaining out of the south through the evening.
Arrivals from of the SW gate could be impacted by a large wildfire
smoke plume southwest of PVU.
&&
.FIRE WEATHER...
ERC values are running close to the 97th percentile across
northern and west central Utah, closer to the 50th-69th percentile
across the southwest. ERCs have been trending higher during the
past several days.
Gusty southwest winds and single digit RH values will continue
across much of Utah into the weekend. A cold front across northern
Utah will lift north of the region this afternoon. Areas north of
the boundary will be cooler, a bit more humid, with a lighter
northwest flow this morning.
A warming trend is forecast through Saturday. RH will trend
higher a bit Saturday through Monday, before falling again.
Isolated convection is not out of the question this weekend,
especially Sunday.
Gusty southwest winds and low RH will persist across portions of
the region next week. Critical fire weather conditions look to
continue at least locally through mid week.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Fire Weather Watch from Saturday morning through Saturday
evening for UTZ498.
Red Flag Warning until 10 PM MDT Saturday for UTZ478>480-482>484-
488-489-492-493-495-497.
Red Flag Warning until 10 PM MDT this evening for UTZ481.
WY...&&
DISCUSSION/AVIATION...Merrill/Bonnette
PREVIOUS DISCUSSION...Rogowski/Struthwolf
For more information from NOAA's National Weather Service visit...
http://weather.gov/saltlakecity
For frequently asked questions about the Area Forecast Discussion
visit...
http://weather.gov/saltlakecity/general/afd_faqs.phpHazardous weather outlook, Sep 14, 2:09 AM MDT, 12 hours 24 minutes before
Hazardous Weather Outlook National Weather Service Salt Lake City UT 209 AM MDT Fri Sep 14 2018 UTZ001>016-019>021-517-518-WYZ021-151300- Cache Valley/Utah Portion-Northern Wasatch Front- Salt Lake and Tooele Valleys-Southern Wasatch Front- Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys- Wasatch Mountains I-80 North-Wasatch Mountains South of I-80- Western Uinta Mountains-Wasatch Plateau/Book Cliffs- Western Uinta Basin-Castle Country-San Rafael Swell- Sanpete/Sevier Valleys-West Central Utah-Southwest Utah- Utahs Dixie and Zion National Park-South Central Utah- Glen Canyon Recreation Area/Lake Powell-Central Mountains- Southern Mountains-Southwest Wyoming- 209 AM MDT Fri Sep 14 2018 This Hazardous Weather Outlook is for the western two thirds of Utah and southwest Wyoming. .DAY ONE...Today and Tonight Widespread critical fire weather conditions are expected due to low humidities and strong winds. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Widespread critical fire weather conditions will continue through at least Saturday due to low humidities and strong winds. These conditions look to persist at least locally through the upcoming week. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures. For more information from NOAA/s National Weather Service visit... http://weather.gov/saltlakecity For information on potential road travel impacts visit... http://www.udottraffic.utah.gov/roadweatherforecast.aspx
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 2:07 AM MDT | Fire Weather Watch | SLC | Garfield, Kane, San Juan, Washington, Wayne | 12 hr |
| Sep 14, 2:26 PM MDT | Wind Advisory | SLC | 32 hr | |
| Sep 14, 2:33 PM MDT | Red Flag Warning | SLC | Garfield, Kane, San Juan, Washington, Wayne | 31 hr |
Nearby
Red Flag Warnings in Utah, 2018Every red flag warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.