Alert archive / Utah / Red Flag Warnings in 2021
Red Flag Warning 21, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Jun 24, 2021, 12:16 AM MDT for 11 counties in Utah. It took effect at Jun 24, 2021, 12:00 PM MDT. It was in force for 9 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 24, 2021, 12:16 AM MDT (06:16 UTC)
- In effect from
- Jun 24, 2021, 12:00 PM MDT
- Expired
- Jun 24, 2021, 9:00 PM MDT
- In force
- 9 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 06:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 24, 3:15 PM MDT | HEAVY RAIN 1.3 | 3 S West Jordan, UT | RECORDED ON A PERSONAL WEATHER STATION IN THE DAYBREAK AREA. 1.24 INCHES MEASURED IN 60 MINUTES. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 00:00Z, 6.3 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
- 85 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 3684 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
012 WWUS85 KSLC 240616 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1216 AM MDT Thu Jun 24 2021 UTZ478-242300- /O.CAN.KSLC.FW.W.0020.000000T0000Z-210625T0300Z/ /O.NEW.KSLC.FW.W.0021.210624T1800Z-210625T0300Z/ Salt Lake Desert- 1216 AM MDT Thu Jun 24 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONE 478... 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 today to 9 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert. * THUNDERSTORMS...Isolated to widely scattered dry thunderstorms are expected to develop this afternoon and evening. * OUTFLOW WINDS...Any thunderstorms will bring the threat of strong and erratic outflow winds. * IMPACTS...Critical fire weather conditions are expected. Any new 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 lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ UTZ492-242300- /O.CAN.KSLC.FW.W.0020.000000T0000Z-210625T0300Z/ /O.NEW.KSLC.FW.W.0021.210624T1800Z-210625T0300Z/ Central Utah West Desert- 1216 AM MDT Thu Jun 24 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONE 492... The National Weather Service in Salt Lake City has issued a Red Flag Warning for dry thunderstorms and gusty outflow winds, which is in effect from noon today to 9 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert. * THUNDERSTORMS...Isolated to widely scattered dry thunderstorms are expected to develop this afternoon and evening. * OUTFLOW WINDS...Any thunderstorms will bring the threat of strong and erratic outflow winds. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ UTZ479>484-488-240730- /O.CAN.KSLC.FW.W.0020.000000T0000Z-210624T1200Z/ Wasatch Mountains-Uinta Mountains-Western Ashley National Forest- Western Uintah Basin-Southern Ashley National Forest- Tavaputs Plateau-Manti National Forest- 1216 AM MDT Thu Jun 24 2021 ...RED FLAG WARNING IS CANCELLED FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 479, 480, 481, 482, 483, 484, AND 488... The National Weather Service in Salt Lake City has cancelled the Red Flag Warning. Any dry lighting overnight is expected to be isolated at best and thus the Red Flag Warning will be cancelled early. $$ UTZ489-493>498-240730- /O.EXP.KSLC.FW.W.0020.000000T0000Z-210624T0600Z/ San Rafael Swell-Central Utah Mountains-Henry Mountains- Color Country West Desert-Color Country Mountains-Mojave Desert- Grand Staircase- 1216 AM MDT Thu Jun 24 2021 ...RED FLAG WARNING HAS EXPIRED FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 489, 493, 494, 495, 496, 497, AND 498... Any dry lighting overnight is expected to be isolated at best and thus the Red Flag Warning will be allowed to expire. $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
3 follow-up statements
626 WWUS85 KSLC 240858 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 258 AM MDT Thu Jun 24 2021 UTZ495-497-242300- /O.EXA.KSLC.FW.W.0021.210624T1800Z-210625T0300Z/ Color Country West Desert-Mojave Desert- 258 AM MDT Thu Jun 24 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 495 AND 497... 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 today to 9 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 495 Color Country West Desert and Fire Weather Zone 497 Mojave Desert. * THUNDERSTORMS...Isolated to widely scattered dry thunderstorms are expected to develop this afternoon and evening. * OUTFLOW WINDS...Any thunderstorms will bring the threat of strong and erratic outflow winds. * IMPACTS...Critical fire weather conditions are expected. Any new 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 lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ UTZ478-492-242300- /O.CON.KSLC.FW.W.0021.210624T1800Z-210625T0300Z/ Salt Lake Desert-Central Utah West Desert- 258 AM MDT Thu Jun 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 478 AND 492... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert and Fire Weather Zone 492 Central Utah West Desert. * THUNDERSTORMS...Isolated to widely scattered dry thunderstorms are expected to develop this afternoon and evening. * OUTFLOW WINDS...Any thunderstorms will bring the threat of strong and erratic outflow winds. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
086 WWUS85 KSLC 242034 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 234 PM MDT Thu Jun 24 2021 UTZ478-492-495-497-250300- /O.CON.KSLC.FW.W.0021.000000T0000Z-210625T0300Z/ Salt Lake Desert-Central Utah West Desert- Color Country West Desert-Mojave Desert- 234 PM MDT Thu Jun 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 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. * THUNDERSTORMS...Isolated to widely scattered dry thunderstorms are expected to develop this afternoon and evening. * OUTFLOW WINDS...Any thunderstorms will bring the threat of strong and erratic outflow winds. * IMPACTS...Critical fire weather conditions are expected. Any new 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 lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
296 WWUS85 KSLC 242037 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 237 PM MDT Thu Jun 24 2021 UTZ478-492-495-497-250300- /O.CON.KSLC.FW.W.0021.000000T0000Z-210625T0300Z/ Salt Lake Desert-Central Utah West Desert- Color Country West Desert-Mojave Desert- 237 PM MDT Thu Jun 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR DRY THUNDERSTORMS AND GUSTY OUTFLOW WINDS FOR FIRE WEATHER ZONES 478, 492, 495 AND 497... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert, Fire Weather Zone 492 Central Utah West Desert, Fire Weather Zone 495 Color Country West Desert and Fire Weather Zone 497 Mojave Desert. * THUNDERSTORMS...Isolated to widely scattered dry thunderstorms are expected to develop this afternoon and evening. * OUTFLOW WINDS...Any thunderstorms will bring the threat of strong and erratic outflow winds. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of lightning...dry fuel conditions...and gusty microburst winds will create favorable conditions for new fire starts and extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 11:57 AM MDT | Special Weather Statement | SLC | Juab | 48 min |
| Jun 24, 12:12 PM MDT | Special Weather Statement | SLC | Tooele | 48 min |
| Jun 24, 12:38 PM MDT | Special Weather Statement | SLC | 37 min | |
| Jun 24, 1:22 PM MDT | Severe Thunderstorm Warning | SLC | Tooele, Utah | 23 min |
| Jun 24, 1:35 PM MDT | Special Weather Statement | SLC | Salt Lake | 25 min |
| Jun 24, 2:27 PM MDT | Special Weather Statement | SLC | Utah | 48 min |
| Jun 24, 2:36 PM MDT | Areal Flood Advisory | SLC | Salt Lake, Tooele, Utah | 69 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.