Alert archive / Utah / Red Flag Warnings in 2021
Red Flag Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at May 6, 2021, 2:51 PM MDT for 5 counties in Utah. It took effect at May 7, 2021, 11:00 AM MDT. It was in force for 3 days. 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 6, 2021, 2:51 PM MDT (20:51 UTC)
- In effect from
- May 7, 2021, 11:00 AM MDT
- Expired
- May 10, 2021, 9:00 PM MDT
- In force
- 3 days
- 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 20:54 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, 8.9 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
- 3121 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 153 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
056 WWUS85 KSLC 062051 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 251 PM MDT Thu May 6 2021 UTZ497-498-071000- /O.NEW.KSLC.FW.W.0007.210507T1700Z-210508T0300Z/ Mojave Desert-Grand Staircase- 251 PM MDT Thu May 6 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM 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 11 AM to 9 PM MDT Friday. * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 6 percent. * IMPACTS...Any fires that develop could 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
11 follow-up statements
499 WWUS85 KSLC 070914 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 314 AM MDT Fri May 7 2021 UTZ497-498-072300- /O.CON.KSLC.FW.W.0007.210507T1700Z-210508T0300Z/ Mojave Desert-Grand Staircase- 314 AM MDT Fri May 7 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
656 WWUS85 KSLC 072023 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 223 PM MDT Fri May 7 2021 UTZ497-080930- /O.EXT.KSLC.FW.W.0007.000000T0000Z-210509T0300Z/ Mojave Desert- 223 PM MDT Fri May 7 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert. * WINDS...South winds 15 to 25 mph with gusts up to 35 mph weakening tonight. Winds will pick up again tomorrow out of the west to northwest 15 to 25 mph with gusts to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop could 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. && $$ UTZ498-080300- /O.CON.KSLC.FW.W.0007.000000T0000Z-210508T0300Z/ Grand Staircase- 223 PM MDT Fri May 7 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498... * AFFECTED AREA...Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
612 WWUS85 KSLC 080234 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 834 PM MDT Fri May 7 2021 UTZ498-081045- /O.EXT.KSLC.FW.W.0007.000000T0000Z-210509T0300Z/ Grand Staircase- 834 PM MDT Fri May 7 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498... * AFFECTED AREA...Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop could 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. && $$ UTZ497-081045- /O.CON.KSLC.FW.W.0007.000000T0000Z-210509T0300Z/ Mojave Desert- 834 PM MDT Fri May 7 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert. * WINDS...South winds 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
624 WWUS85 KSLC 080902 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 302 AM MDT Sat May 8 2021 UTZ497-498-082300- /O.CON.KSLC.FW.W.0007.000000T0000Z-210509T0300Z/ Mojave Desert-Grand Staircase- 302 AM MDT Sat May 8 2021 ...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...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop could 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
919 WWUS85 KSLC 082100 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 300 PM MDT Sat May 8 2021 UTZ497-498-090300- /O.CON.KSLC.FW.W.0007.000000T0000Z-210509T0300Z/ Mojave Desert-Grand Staircase- 300 PM MDT Sat May 8 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Northwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
355 WWUS85 KSLC 090253 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 853 PM MDT Sat May 8 2021 UTZ497-498-091100- /O.EXT.KSLC.FW.W.0007.000000T0000Z-210511T0300Z/ Mojave Desert-Grand Staircase- 853 PM MDT Sat May 8 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT MONDAY 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...Northwest 10 to 20 mph with gusts 30 to 40 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. * ADDITIONAL INFORMATION...Expect a break in critical fire weather conditions each night as winds drop off and humidities recover into the 20 and 30 percent range. 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
323 WWUS85 KSLC 090810 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 210 AM MDT Sun May 9 2021 UTZ497-498-092200- /O.CON.KSLC.FW.W.0007.000000T0000Z-210511T0300Z/ Mojave Desert-Grand Staircase- 210 AM MDT Sun May 9 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Northwest 10 to 20 mph with gusts 30 to 40 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. * ADDITIONAL INFORMATION...Expect a break in critical fire weather conditions at night as winds drop off and humidities recover into the 20 and 30 percent range. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
130 WWUS85 KSLC 092029 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 229 PM MDT Sun May 9 2021 UTZ497-498-101200- /O.CON.KSLC.FW.W.0007.000000T0000Z-210511T0300Z/ Mojave Desert-Grand Staircase- 229 PM MDT Sun May 9 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT MONDAY 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...Northwest 10 to 20 mph with gusts into the low 30 mph range during the peak heating hours. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. * ADDITIONAL INFORMATION...Expect a break in critical fire weather conditions at night as winds drop off and humidities recover into the 20 and 30 percent range. 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
230 WWUS85 KSLC 100855 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 255 AM MDT Mon May 10 2021 UTZ497-498-102200- /O.CON.KSLC.FW.W.0007.000000T0000Z-210511T0300Z/ Mojave Desert-Grand Staircase- 255 AM MDT Mon May 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Northwest 10 to 20 mph with gusts 30 to 40 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
022 WWUS85 KSLC 102101 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 301 PM MDT Mon May 10 2021 UTZ497-498-110300- /O.CON.KSLC.FW.W.0007.000000T0000Z-210511T0300Z/ Mojave Desert-Grand Staircase- 301 PM MDT Mon May 10 2021 ...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...Northwest 10 to 20 mph with gusts 30 to 40 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Any fires that develop could 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
721 WWUS85 KSLC 110325 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 925 PM MDT Mon May 10 2021 UTZ497-498-110430- /O.EXP.KSLC.FW.W.0007.000000T0000Z-210511T0300Z/ Mojave Desert-Grand Staircase- 925 PM MDT Mon May 10 2021 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... Winds have decreased and relative humidities are trending upward across far southern Utah this evening. Therefore, the Red Flag Warning for the Mojave Desert and Grand Staircase has been allowed to expire. $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
Nearby
Red Flag Warnings in Utah, 2021Every red flag warning in 2021
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.