Alert archive / Utah / Red Flag Warnings in 2020
Red Flag Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at May 21, 2020, 10:55 AM MDT for 5 counties in Utah. It took effect at May 22, 2020, 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
- May 21, 2020, 10:55 AM MDT (16:55 UTC)
- In effect from
- May 22, 2020, 12:00 PM MDT
- Expired
- May 22, 2020, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Salt Lake City, UT
Counties Garfield County, UT, Kane County, UT, San Juan County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 120 km from the middle of the area, began a volume at 16:59 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 4.9 hours before the alert went out and 273 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
- 2217 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
991 WWUS85 KSLC 211655 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1055 AM MDT Thu May 21 2020 UTZ497-498-221200- /O.NEW.KSLC.FW.W.0002.200522T1800Z-200523T0300Z/ Mojave Desert-Grand Staircase- 1055 AM MDT Thu May 21 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 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 noon to 9 PM MDT Friday. * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph beginning Friday afternoon and continuing through early evening. * RELATIVE HUMIDITY...As low as 7 to 12 percent. * IMPACTS...Critical fire weather conditions are possible. Fire starts could spread rapidly. 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
4 follow-up statements
947 WWUS85 KSLC 220306 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 906 PM MDT Thu May 21 2020 UTZ497-498-221115- /O.CON.KSLC.FW.W.0002.200522T1800Z-200523T0300Z/ Mojave Desert-Grand Staircase- 906 PM MDT Thu May 21 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts 30 to 40 mph beginning Friday afternoon and continuing through early evening. * RELATIVE HUMIDITY...As low as 7 to 12 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
725 WWUS85 KSLC 220956 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 356 AM MDT Fri May 22 2020 UTZ497-498-230300- /O.CON.KSLC.FW.W.0002.200522T1800Z-200523T0300Z/ Mojave Desert-Grand Staircase- 356 AM MDT Fri May 22 2020 ...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 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts 30 to 40 mph beginning this afternoon and continuing through early evening. * RELATIVE HUMIDITY...As low as 7 to 12 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
615 WWUS85 KSLC 222105 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 305 PM MDT Fri May 22 2020 UTZ497-498-230300- /O.CON.KSLC.FW.W.0002.000000T0000Z-200523T0300Z/ Mojave Desert-Grand Staircase- 305 PM MDT Fri May 22 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts 30 to 40 mph beginning this afternoon and continuing through early evening. * RELATIVE HUMIDITY...As low as 7 to 12 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
888 WWUS85 KSLC 230248 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 848 PM MDT Fri May 22 2020 UTZ497-498-230400- /O.EXP.KSLC.FW.W.0002.000000T0000Z-200523T0300Z/ Mojave Desert-Grand Staircase- 848 PM MDT Fri May 22 2020 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... Winds will start to diminish this evening along with recovering humidities behind a cold front passage. $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
Nearby
Red Flag Warnings in Utah, 2020Every red flag warning in 2020
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.