Alert archive / Utah / Red Flag Warnings in 2015
Red Flag Warning 4, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Sep 3, 2015, 3:00 PM MDT for 11 counties in Utah. It took effect at Sep 4, 2015, 10:00 AM MDT. It was in force for 35 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 3, 2015, 3:00 PM MDT (21:00 UTC)
- In effect from
- Sep 4, 2015, 10:00 AM MDT
- Expired
- Sep 5, 2015, 9:07 PM MDT
- In force
- 35 hr
- Issued by
- NWS Salt Lake City, UT
Counties Beaver County, UT, Box Elder County, UT, Davis County, UT, Iron County, UT, Juab County, UT, Millard County, UT, Salt Lake County, UT, Sanpete County, UT, Tooele County, UT, Utah County, UT, Washington County, UT
The radar
The Salt Lake City radar (KMTX), 188 km from the middle of the area, began a volume at 21:01 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, 9.0 hours before the alert went out and 149 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
- 3008 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
243 WWUS85 KSLC 032100 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 300 PM MDT THU SEP 3 2015 UTZ478-492-495-497-040500- /O.NEW.KSLC.FW.W.0004.150904T1600Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 300 PM MDT THU SEP 3 2015 ...RED FLAG WARNING IN EFFECT FROM 10 AM FRIDAY TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...492...495 AND 497... 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 FRIDAY TO 10 PM MDT SATURDAY. * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT...FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT...FIRE WEATHER ZONE 495 COLOR COUNTRY WEST DESERT AND FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH WILL DEVELOP ON FRIDAY. WINDS MAY DECREASE A BIT OVERNIGHT FRIDAY...BUT WILL INCREASE AGAIN DURING THE DAY SATURDAY AND COULD POTENTIALLY BE EVEN STRONGER THAN FRIDAY. * RELATIVE HUMIDITY...10 TO 15 PERCENT IN THE AFTERNOONS..WITH POOR OVERNIGHT HUMIDITY RECOVERY. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS FRIDAY AND SATURDAY. 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. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
6 follow-up statements
341 WWUS85 KSLC 040454 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1054 PM MDT THU SEP 3 2015 UTZ478-492-495-497-041200- /O.CON.KSLC.FW.W.0004.150904T1600Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 1054 PM MDT THU SEP 3 2015 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM FRIDAY TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...492...495 AND 497... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT...FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT...FIRE WEATHER ZONE 495 COLOR COUNTRY WEST DESERT AND FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH WILL DEVELOP ON FRIDAY. WINDS MAY DECREASE A BIT OVERNIGHT FRIDAY... BUT WILL INCREASE AGAIN DURING THE DAY SATURDAY AND COULD POTENTIALLY BE EVEN STRONGER THAN FRIDAY. * RELATIVE HUMIDITY...10 TO 15 PERCENT IN THE AFTERNOONS...WITH POOR OVERNIGHT HUMIDITY RECOVERY. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS FRIDAY AND SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
889 WWUS85 KSLC 041008 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 408 AM MDT FRI SEP 4 2015 UTZ478-492-495-497-042300- /O.CON.KSLC.FW.W.0004.150904T1600Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 408 AM MDT FRI SEP 4 2015 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...492...495 AND 497... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT...FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT...FIRE WEATHER ZONE 495 COLOR COUNTRY WEST DESERT AND FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH WILL DEVELOP THIS AFTERNOON AND CONTINUE INTO THE EVENING. WINDS MAY DECREASE OVERNIGHT FOR A PERIOD. SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH WILL REDEVELOP SATURDAY AFTERNOON AND CONTINUE INTO THE EVENING BEFORE DIMINISHING. * RELATIVE HUMIDITY...10 TO 15 PERCENT THIS AFTERNOON AND EVENING AND AGAIN SATURDAY AFTERNOON AND EVENING. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS TODAY AND SATURDAY. 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. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
205 WWUS85 KSLC 042026 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 226 PM MDT FRI SEP 4 2015 UTZ478-492-495-497-051200- /O.CON.KSLC.FW.W.0004.000000T0000Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 226 PM MDT FRI SEP 4 2015 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478... 492...495 AND 497... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT...FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT...FIRE WEATHER ZONE 495 COLOR COUNTRY WEST DESERT AND FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH CONTINUE INTO THIS EVENING...REDEVELOPING TOMORROW MORNING. A SHARP WIND SHIFT TO THE NORTHWEST IS FORECAST WITH THE ARRIVAL OF THE COLD FRONT FROM NORTH TO SOUTH ACROSS MUCH OF THE STATE TOMORROW AFTERNOON AND EVENING. * RELATIVE HUMIDITY...10 TO 15 PERCENT THROUGH THIS EVENING AND AGAIN SATURDAY AFTERNOON AND EVENING. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS TODAY AND SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ ROGOWSKI FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
618 WWUS85 KSLC 051003 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 403 AM MDT SAT SEP 5 2015 UTZ478-492-495-497-052215- /O.CON.KSLC.FW.W.0004.000000T0000Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 403 AM MDT SAT SEP 5 2015 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...492...495 AND 497... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT...FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT...FIRE WEATHER ZONE 495 COLOR COUNTRY WEST DESERT AND FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH REDEVELOPING THIS MORNING. A SHARP WIND SHIFT TO THE NORTHWEST IS FORECAST WITH THE ARRIVAL OF THE COLD FRONT FROM NORTH TO SOUTH ACROSS THE STATE TODAY. * RELATIVE HUMIDITY...AROUND 15 PERCENT THIS AFTERNOON. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS TODAY. 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. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
587 WWUS85 KSLC 051956 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 156 PM MDT SAT SEP 5 2015 UTZ478-492-495-497-060400- /O.CON.KSLC.FW.W.0004.000000T0000Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 156 PM MDT SAT SEP 5 2015 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...492...495 AND 497... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT...FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT...FIRE WEATHER ZONE 495 COLOR COUNTRY WEST DESERT AND FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...SOUTH WINDS 25 TO 35 MPH WITH GUSTS UP TO 50 MPH AHEAD OF A COLD FRONT ACROSS WEST CENTRAL AND SOUTHWEST UTAH. A SHARP WIND SHIFT TO THE NORTHWEST IS FORECAST WITH THE ARRIVAL OF THE COLD FRONT FROM NORTH TO SOUTH ACROSS THE STATE. DIXIE WILL REMAIN SOUTHERLY THROUGH THE REST OF TODAY. * RELATIVE HUMIDITY...AROUND 15 PERCENT. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ ROGOWSKI FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
506 WWUS85 KSLC 060307 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 907 PM MDT SAT SEP 5 2015 UTZ478-492-495-497-060415- /O.CAN.KSLC.FW.W.0004.000000T0000Z-150906T0400Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- COLOR COUNTRY WEST DESERT-MOJAVE DESERT- 907 PM MDT SAT SEP 5 2015 ...RED FLAG WARNING IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...492...495 AND 497... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS CANCELLED THE RED FLAG WARNING. WINDS WILL CONTINUE TO DIMINISH AND HUMIDITIES RECOVER THROUGH THE REMAINDER OF THE EVENING. $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 3:23 PM MDT | High Wind Watch | SLC | 23 hr | |
| Sep 3, 3:23 PM MDT | Wind Advisory | SLC | 54 hr |
Nearby
Red Flag Warnings in Utah, 2015Every red flag warning in 2015
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.