Alert archive / Utah / Red Flag Warnings in 2021
Red Flag Warning 3, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Apr 12, 2021, 2:51 PM MDT for 9 counties in Utah. It took effect at Apr 13, 2021, 2:00 PM MDT. It was in force for 31 hr. 28 reports 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
- Apr 12, 2021, 2:51 PM MDT (20:51 UTC)
- In effect from
- Apr 13, 2021, 2:00 PM MDT
- Expired
- Apr 14, 2021, 8:48 PM MDT
- In force
- 31 hr
- Issued by
- NWS Salt Lake City, UT
Counties Beaver County, UT, Carbon County, UT, Emery County, UT, Garfield County, UT, Iron County, UT, Kane County, UT, San Juan County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 118 km from the middle of the area, began a volume at 20:53 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 |
|---|---|---|---|
| Apr 13, 3:55 PM MDT | NON-TSTM WND GST 41 | St George, UT | ST GEORGE MUNICIPAL AIRPORT - 2940 FT |
| Apr 13, 4:00 PM MDT | NON-TSTM WND GST 45 | Cedar City, UT | CEDAR CITY MUNICIPAL AIRPORT - 5581 FT |
| Apr 13, 4:03 PM MDT | NON-TSTM WND GST 38 | Enterprise, UT | ENTERPRISE - 5340 FT |
| Apr 13, 4:10 PM MDT | NON-TSTM WND GST 35 | Hamiltons Ft, UT | I-15 AT MILEPOST 29 - 3921 FT |
| Apr 13, 4:10 PM MDT | NON-TSTM WND GST 35 | Hamiltons Ft, UT | I-15 AT MILEPOST 29 - 3921 FT |
| Apr 13, 4:10 PM MDT | NON-TSTM WND GST 42 | Hamiltons Ft, UT | I-15 AT HAMILTONS FORT - 5745 FT |
| Apr 13, 4:20 PM MDT | NON-TSTM WND GST 36 | Kanarraville, UT | I-15 AT BLACK RIDGE - 5160 FT |
| Apr 13, 4:46 PM MDT | NON-TSTM WND GST 36 | Lund, UT | JENSEN SPRING - 5744 FT |
| Apr 13, 4:50 PM MDT | NON-TSTM WND GST 39 | Beaver, UT | I-15 AT BEAVER RIDGE - 6440 FT |
| Apr 13, 4:52 PM MDT | NON-TSTM WND GST 41 | Ivins, UT | BADGER SPRING - 3990 FT |
| Apr 13, 4:56 PM MDT | NON-TSTM WND GST 40 | St George, UT | ST GEORGE MUNICIPAL AIRPORT - 2940 FT |
| Apr 13, 4:57 PM MDT | NON-TSTM WND GST 38 | Greenville, UT | BEAVER MUNICIPAL AIRPORT - 5860 FT |
| Apr 13, 5:00 PM MDT | NON-TSTM WND GST 51 | Cedar City, UT | BRIAN HEAD 2S - 10472 FT |
| Apr 13, 5:10 PM MDT | NON-TSTM WND GST 36 | Huntington, UT | SR-10 AT POISON SPRING BENCH - 6074 FT |
| Apr 13, 5:10 PM MDT | NON-TSTM WND GST 42 | Beaver, UT | I-15 AT BEAVER - 5941 FT |
| Apr 13, 5:17 PM MDT | NON-TSTM WND GST 39 | Elmo, UT | FLATTOP MOUNTAIN - 6120 FT |
| Apr 13, 5:25 PM MDT | NON-TSTM WND GST 49 | Cedar City, UT | CEDAR CITY MUNICIPAL AIRPORT - 5581 FT |
| Apr 13, 5:30 PM MDT | NON-TSTM WND GST 36 | Abraham, UT | I-15 AT WILDCAT RIDGE - 6200 FT |
| Apr 13, 5:40 PM MDT | NON-TSTM WND GST 46 | Cedar City, UT | I-15 AT MP 62.5 NORTH CEDAR CITY - 5760 FT |
| Apr 13, 5:50 PM MDT | NON-TSTM WND GST 35 | Abraham, UT | I-15 AT PINE CREEK HILL - 6508 FT |
| Apr 13, 5:57 PM MDT | NON-TSTM WND GST 37 | Paria, UT | TELEGRAPH FLAT - 5460 FT |
| Apr 13, 6:00 PM MDT | NON-TSTM WND GST 39 | Kanarraville, UT | I-15 AT BLACK RIDGE - 5160 FT |
| Apr 13, 6:00 PM MDT | NON-TSTM WND GST 45 | Hamiltons Ft, UT | I-15 AT HAMILTONS FORT - 5745 FT |
| Apr 13, 6:04 PM MDT | NON-TSTM WND GST 37 | Harrisburg, UT | WHITE REEF - 3440 FT |
| Apr 13, 6:30 PM MDT | NON-TSTM WND GST 42 | Cedar City, UT | I-15 AT MP 57 CEDAR CITY - 5959 FT |
| Apr 13, 6:46 PM MDT | NON-TSTM WND GST 37 | Lund, UT | JENSEN SPRING - 5744 FT |
| Apr 13, 7:03 PM MDT | NON-TSTM WND GST 46 | Enterprise, UT | ENTERPRISE - 5340 FT |
| Apr 14, 3:35 PM MDT | NON-TSTM WND GST 44 | 1 E Blanding Muni Arpt, UT | AWOS STATION KBDG BLANDING. |
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 12:00Z, 8.9 hours before the alert went out and 294 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
- 2237 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
377 WWUS85 KSLC 122051 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 251 PM MDT Mon Apr 12 2021 UTZ495-497-131200- /O.NEW.KSLC.FW.W.0003.210413T2000Z-210415T0300Z/ Color Country West Desert-Mojave Desert- 251 PM MDT Mon Apr 12 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TUESDAY TO 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 495 AND 497... 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 2 PM Tuesday to 9 PM MDT Wednesday. * AFFECTED AREA...Fire Weather Zone 495 Color Country West Desert and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest winds 15-25 mph with gusts over 30 mph are expected each afternoon, with lesser winds during the nighttime and morning time frame. * RELATIVE HUMIDITY...Between 10 and 15 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. && $$ UTZ494-498-131200- /O.NEW.KSLC.FW.W.0003.210414T1800Z-210415T0300Z/ Henry Mountains-Grand Staircase- 251 PM MDT Mon Apr 12 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 494 AND 498... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 9 PM MDT Wednesday. * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest winds of 15-20 mph with gusts over 30 mph are expected. * RELATIVE HUMIDITY...Between 10 and 15%. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
6 follow-up statements
659 WWUS85 KSLC 130859 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 259 AM MDT Tue Apr 13 2021 UTZ498-132300- /O.EXT.KSLC.FW.W.0003.210413T2000Z-210415T0300Z/ Grand Staircase- 259 AM MDT Tue Apr 13 2021 ...RED FLAG WARNING NOW IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT WEDNESDAY 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 9 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. && $$ UTZ495-497-132300- /O.CON.KSLC.FW.W.0003.210413T2000Z-210415T0300Z/ Color Country West Desert-Mojave Desert- 259 AM MDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 495 AND 497... * AFFECTED AREA...Fire Weather Zone 495 Color Country West Desert and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...Between 10 and 15 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ494-132300- /O.CON.KSLC.FW.W.0003.210414T1800Z-210415T0300Z/ Henry Mountains- 259 AM MDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 494... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...Between 10 and 15 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
502 WWUS85 KSLC 132052 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 252 PM MDT Tue Apr 13 2021 UTZ495-497-498-141000- /O.CON.KSLC.FW.W.0003.000000T0000Z-210415T0300Z/ Color Country West Desert-Mojave Desert-Grand Staircase- 252 PM MDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 495, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 495 Color Country West Desert, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...Between 10 and 15 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ494-141000- /O.CON.KSLC.FW.W.0003.210414T1800Z-210415T0300Z/ Henry Mountains- 252 PM MDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 494... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...Between 10 and 15 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
479 WWUS85 KSLC 140304 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 904 PM MDT Tue Apr 13 2021 UTZ495-497-498-141115- /O.CON.KSLC.FW.W.0003.000000T0000Z-210415T0300Z/ Color Country West Desert-Mojave Desert-Grand Staircase- 904 PM MDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 495, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 495 Color Country West Desert, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...Between 10 and 15 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ494-141115- /O.CON.KSLC.FW.W.0003.210414T1800Z-210415T0300Z/ Henry Mountains- 904 PM MDT Tue Apr 13 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 494... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest 25 to 30 mph with gusts up to 55 mph. * RELATIVE HUMIDITY...Between 10 and 15 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
844 WWUS85 KSLC 140916 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 316 AM MDT Wed Apr 14 2021 UTZ489-142200- /O.EXA.KSLC.FW.W.0003.210414T1800Z-210415T0300Z/ San Rafael Swell- 316 AM MDT Wed Apr 14 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 489... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 9 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell. * WINDS...Southwest 25 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Between 7 and 12 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ495-497-498-142200- /O.CON.KSLC.FW.W.0003.000000T0000Z-210415T0300Z/ Color Country West Desert-Mojave Desert-Grand Staircase- 316 AM MDT Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 495, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 495 Color Country West Desert, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...Between 12 and 15 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. && $$ UTZ494-142200- /O.CON.KSLC.FW.W.0003.210414T1800Z-210415T0300Z/ Henry Mountains- 316 AM MDT Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 494... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains. * WINDS...Southwest 25 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...Between 7 and 12 percent. * IMPACTS...Any fires that develop could spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
500 WWUS85 KSLC 142111 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 311 PM MDT Wed Apr 14 2021 UTZ489-494-495-497-498-150300- /O.CON.KSLC.FW.W.0003.000000T0000Z-210415T0300Z/ San Rafael Swell-Henry Mountains-Color Country West Desert- Mojave Desert-Grand Staircase- 311 PM MDT Wed Apr 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489, 494, 495, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell, Fire Weather Zone 494 Henry Mountains, Fire Weather Zone 495 Color Country West Desert, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 25 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...Between 7 and 12 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
240 WWUS85 KSLC 150248 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 848 PM MDT Wed Apr 14 2021 UTZ489-494-495-497-498-150400- /O.CAN.KSLC.FW.W.0003.000000T0000Z-210415T0300Z/ San Rafael Swell-Henry Mountains-Color Country West Desert- Mojave Desert-Grand Staircase- 848 PM MDT Wed Apr 14 2021 ...RED FLAG WARNING IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489, 494, 495, 497, AND 498... The National Weather Service in Salt Lake City has cancelled the Red Flag Warning. Wind continue to diminish this evening while humidity values are starting recover. $$ 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 |
|---|---|---|---|---|
| Apr 12, 2:47 AM MDT | Wind Advisory | SLC | Box Elder, Cache, Davis, Weber | 33 hr |
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.