Alert archive / Utah / Red Flag Warnings in 2018
Red Flag Warning 21, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Aug 25, 2018, 9:49 AM MDT for 8 counties in Utah. It took effect at Aug 26, 2018, 12:00 PM MDT. It was in force for 9 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
- Aug 25, 2018, 9:49 AM MDT (15:49 UTC)
- In effect from
- Aug 26, 2018, 12:00 PM MDT
- Expired
- Aug 26, 2018, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Salt Lake City, UT
Counties Box Elder County, UT, Davis County, UT, Juab County, UT, Millard County, UT, Salt Lake County, UT, Sanpete County, UT, Tooele County, UT, Utah County, UT
The radar
The Salt Lake City radar (KMTX), 114 km from the middle of the area, began a volume at 15:50 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, 3.8 hours before the alert went out and 75 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
- 93 J/kg
- Mixed-layer CIN
- -318 J/kg
- Mixed-layer LCL
- 2490 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
033 WWUS85 KSLC 251549 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 949 AM MDT Sat Aug 25 2018 UTZ478-492-261200- /O.UPG.KSLC.FW.A.0005.180826T1800Z-180827T0300Z/ /O.NEW.KSLC.FW.W.0021.180826T1800Z-180827T0300Z/ Salt Lake Desert-Central Utah West Desert- 949 AM MDT Sat Aug 25 2018 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478 AND 492... 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. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert and Fire Weather Zone 492 Central Utah West Desert. * WINDS...Southwest 15 to 25 mph with gusts near 40 mph. * RELATIVE HUMIDITY...As low as 8 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
2 follow-up statements
318 WWUS85 KSLC 261029 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 429 AM MDT Sun Aug 26 2018 UTZ478-492-261830- /O.CON.KSLC.FW.W.0021.180826T1800Z-180827T0300Z/ Salt Lake Desert-Central Utah West Desert- 429 AM MDT Sun Aug 26 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478 AND 492... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert and Fire Weather Zone 492 Central Utah West Desert. * WINDS...Southwest 15 to 25 mph with gusts near 40 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop will have the potential to spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
183 WWUS85 KSLC 261804 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1204 PM MDT Sun Aug 26 2018 UTZ478-492-270300- /O.CON.KSLC.FW.W.0021.000000T0000Z-180827T0300Z/ Salt Lake Desert-Central Utah West Desert- 1204 PM MDT Sun Aug 26 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478 AND 492... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert and Fire Weather Zone 492 Central Utah West Desert. * WINDS...Southwest 15 to 25 mph with gusts near 40 mph. * RELATIVE HUMIDITY...As low as 8 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
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.