Alert archive / Utah / Red Flag Warnings in 2020
Red Flag Warning 49, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Oct 25, 2020, 3:02 AM MDT for 10 counties in Utah. It took effect at Oct 25, 2020, 2:00 PM MDT. It was in force for 31 hr. 11 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
- Oct 25, 2020, 3:02 AM MDT (09:02 UTC)
- In effect from
- Oct 25, 2020, 2:00 PM MDT
- Expired
- Oct 26, 2020, 9:00 PM MDT
- In force
- 31 hr
- Issued by
- NWS Salt Lake City, UT
Counties Beaver County, UT, Garfield County, UT, Iron County, UT, Juab County, UT, Kane County, UT, Millard County, UT, San Juan County, UT, Sanpete County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 98 km from the middle of the area, began a volume at 09:00 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 |
|---|---|---|---|
| Oct 25, 4:50 PM MDT | NON-TSTM WND GST 62 | Manderfield, UT | PORTABLE TRAFFIC 1 - 6204 FT |
| Oct 25, 5:04 PM MDT | NON-TSTM WND GST 58 | Harrisburg, UT | WHITE REEF - 3440 FT |
| Oct 25, 5:20 PM MDT | NON-TSTM WND GST 62 | Hamiltons Ft, UT | I-15 AT MILEPOST 29 - 3921 FT |
| Oct 25, 5:50 PM MDT | NON-TSTM WND GST 67 | Beaver, UT | PORTABLE TRAFFIC 2 - 6210 FT |
| Oct 25, 5:50 PM MDT | NON-TSTM WND GST 67 | Beaver, UT | CORRECTED LAT LON. PORTABLE TRAFFIC 2 - 3155 FT |
| Oct 25, 6:00 PM MDT | SNOW 1 | Scipio, UT | |
| Oct 25, 6:04 PM MDT | NON-TSTM WND GST 61 | Harrisburg, UT | WHITE REEF - 3440 FT |
| Oct 25, 6:10 PM MDT | NON-TSTM WND GST 68 | Manderfield, UT | CORRECTED LAT LON. PORTABLE TRAFFIC 1 - 3350 FT |
| Oct 25, 6:30 PM MDT | NON-TSTM WND GST 63 | Hamiltons Ft, UT | I-15 AT MILEPOST 29 - 3921 FT |
| Oct 25, 6:30 PM MDT | NON-TSTM WND GST 71 | Manderfield, UT | PORTABLE TRAFFIC 1 - 3350 FT |
| Oct 25, 7:52 PM MDT | NON-TSTM WND GST 59 | Ivins, UT | BADGER SPRING - 3990 FT |
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, 9.0 hours before the alert went out and 280 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
- 2912 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 385 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
956 WWUS85 KSLC 250902 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 302 AM MDT Sun Oct 25 2020 UTZ494-497-498-252200- /O.UPG.KSLC.FW.A.0029.201025T2000Z-201027T0300Z/ /O.NEW.KSLC.FW.W.0049.201025T2000Z-201027T0300Z/ Henry Mountains-Mojave Desert-Grand Staircase- 302 AM MDT Sun Oct 25 2020 ...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 494, 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 2 PM this afternoon to 9 PM MDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...West 15 to 20 mph with gusts up to 35 mph today. Winds becoming north 20 to 25 mph with gusts to 45 mph possible Monday afternoon through Monday evening. * RELATIVE HUMIDITY...As low as 15-20 percent today and 12-16 percent Monday. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may 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. && $$ UTZ492-495-252200- /O.NEW.KSLC.FW.W.0049.201026T1800Z-201027T0100Z/ Central Utah West Desert-Color Country West Desert- 302 AM MDT Sun Oct 25 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon Monday to 7 PM MDT Monday. * AFFECTED AREA...Western portions of both Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...North winds 15-25 mph with gusts over 30 mph. * RELATIVE HUMIDITY...Between 13 and 17 percent. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
3 follow-up statements
132 WWUS85 KSLC 252051 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 251 PM MDT Sun Oct 25 2020 UTZ494-497-498-261100- /O.CON.KSLC.FW.W.0049.000000T0000Z-201027T0300Z/ Henry Mountains-Mojave Desert-Grand Staircase- 251 PM MDT Sun Oct 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 494, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...West 15 to 20 mph with gusts up to 35 mph today. Winds becoming north 20 to 25 mph with gusts to 45 mph possible Monday afternoon through Monday evening. * RELATIVE HUMIDITY...As low as 15-20 percent today and 12- 16 percent Monday. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may 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. && $$ UTZ492-495-261100- /O.CON.KSLC.FW.W.0049.201026T1800Z-201027T0100Z/ Central Utah West Desert-Color Country West Desert- 251 PM MDT Sun Oct 25 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...North winds 15-25 mph with gusts over 30 mph. * RELATIVE HUMIDITY...Between 13 and 17 percent. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
239 WWUS85 KSLC 260940 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 340 AM MDT Mon Oct 26 2020 UTZ494-497-498-262200- /O.CON.KSLC.FW.W.0049.000000T0000Z-201027T0300Z/ Henry Mountains-Mojave Desert-Grand Staircase- 340 AM MDT Mon Oct 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 494, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...North 20 to 25 mph with gusts to 45 mph possible Monday afternoon through Monday evening. * RELATIVE HUMIDITY...As low as 12-16 percent this afternoon. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may 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. && $$ UTZ492-495-262200- /O.CON.KSLC.FW.W.0049.201026T1800Z-201027T0100Z/ Central Utah West Desert-Color Country West Desert- 340 AM MDT Mon Oct 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...North 15-25 mph with gusts over 30 mph. * RELATIVE HUMIDITY...Between 13 and 17 percent. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
928 WWUS85 KSLC 262112 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 312 PM MDT Mon Oct 26 2020 UTZ494-497-498-270300- /O.CON.KSLC.FW.W.0049.000000T0000Z-201027T0300Z/ Henry Mountains-Mojave Desert-Grand Staircase- 312 PM MDT Mon Oct 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 494, 497, AND 498... * AFFECTED AREA...Fire Weather Zone 494 Henry Mountains, Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...North 20 to 25 mph with gusts to 45 mph expected through this evening. * RELATIVE HUMIDITY...As low as 12-16 percent this afternoon. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may 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. && $$ UTZ492-495-270100- /O.CON.KSLC.FW.W.0049.000000T0000Z-201027T0100Z/ Central Utah West Desert-Color Country West Desert- 312 PM MDT Mon Oct 26 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...North 15-25 mph with gusts over 30 mph. * RELATIVE HUMIDITY...Between 13 and 17 percent. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 25, 3:08 AM MDT | High Wind Warning | SLC | 41 hr | |
| Oct 25, 3:08 AM MDT | Wind Advisory | SLC | 27 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.