Alert archive / Utah / Red Flag Warnings in 2017
Red Flag Warning 16, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Sep 7, 2017, 1:41 PM MDT for 14 counties in Utah. It took effect at Sep 8, 2017, 12:00 PM MDT. It was in force for 10 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 7, 2017, 1:41 PM MDT (19:41 UTC)
- In effect from
- Sep 8, 2017, 12:00 PM MDT
- Expired
- Sep 8, 2017, 9:47 PM MDT
- In force
- 10 hr
- Issued by
- NWS Salt Lake City, UT
Counties Box Elder County, UT, Cache County, UT, Davis 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, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 80 km from the middle of the area, began a volume at 19:39 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, 7.7 hours before the alert went out and 19 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
- 2939 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
284 WWUS85 KSLC 071941 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 141 PM MDT Thu Sep 7 2017 UTZ478-479-492-081200- /O.NEW.KSLC.FW.W.0016.170908T1800Z-170909T0600Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- 141 PM MDT Thu Sep 7 2017 ...RED FLAG WARNING IN EFFECT FROM NOON FRIDAY TO MIDNIGHT MDT FRIDAY NIGHT FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 478...479 AND 492... The National Weather Service in Salt Lake City has issued a Red Flag Warning for dry thunderstorms and gusty outflow winds... which is in effect from noon Friday to midnight MDT Friday night. * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains and Fire Weather Zone 492 Central Utah West Desert. * THUNDERSTORMS...Scattered thunderstorms after a prolonged hot and dry period with the potential for dry lightning are expected across the area Friday afternoon through Friday evening. * OUTFLOW WINDS...Gusty and erratic winds near thunderstorms are possible. * IMPACTS...The threat of dry lightning and gusty thunderstorm winds after a hot dry spell will be conducive to the start and rapid growth of new fires, as well as the spread of existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
3 follow-up statements
500 WWUS85 KSLC 080832 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 232 AM MDT Fri Sep 8 2017 UTZ478-479-492-082300- /O.CON.KSLC.FW.W.0016.170908T1800Z-170909T0600Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- 232 AM MDT Fri Sep 8 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO MIDNIGHT MDT TONIGHT FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 478...479 AND 492... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains and Fire Weather Zone 492 Central Utah West Desert. * THUNDERSTORMS...Scattered thunderstorms after a prolonged hot and dry period with the potential for dry lightning are expected across the area this afternoon and evening. * OUTFLOW WINDS...Gusty and erratic winds near thunderstorms are possible mainly in the 35 to 45 mph range. * IMPACTS...The threat of dry lightning and gusty thunderstorm winds after a hot dry spell will be conducive to the start and rapid growth of new fires, as well as the spread of existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ Rogowski For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
180 WWUS85 KSLC 082200 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 400 PM MDT Fri Sep 8 2017 UTZ478-479-492-090600- /O.CON.KSLC.FW.W.0016.000000T0000Z-170909T0600Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- 400 PM MDT Fri Sep 8 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 478...479 AND 492... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire Weather Zone 479 Wasatch Mountains and Fire Weather Zone 492 Central Utah West Desert. * THUNDERSTORMS...Scattered thunderstorms after a prolonged hot and dry period with the potential for dry lightning are expected across the area this afternoon and evening. * OUTFLOW WINDS...Gusty and erratic winds near thunderstorms are possible mainly in the 35 to 45 mph range. * IMPACTS...The threat of dry lightning and gusty thunderstorm winds after a hot dry spell will be conducive to the start and rapid growth of new fires, as well as the spread of existing fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
143 WWUS85 KSLC 090347 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 947 PM MDT Fri Sep 8 2017 UTZ478-479-492-090500- /O.CAN.KSLC.FW.W.0016.000000T0000Z-170909T0600Z/ Salt Lake Desert-Wasatch Mountains-Central Utah West Desert- 947 PM MDT Fri Sep 8 2017 ...RED FLAG WARNING IS CANCELLED FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 478...479 AND 492... The National Weather Service in Salt Lake City has cancelled the Red Flag Warning. Thunderstorms have diminished over northern and west-central Utah this evening. $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
Nearby
Red Flag Warnings in Utah, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.