Alert archive / Utah / Red Flag Warnings in 2012
Red Flag Warning 29, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Sep 5, 2012, 3:21 PM MDT for 15 counties in Utah. It took effect at Sep 6, 2012, 12:00 PM MDT. It was in force for 8 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
- Sep 5, 2012, 3:21 PM MDT (21:21 UTC)
- In effect from
- Sep 6, 2012, 12:00 PM MDT
- Expired
- Sep 6, 2012, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Salt Lake City, UT
Counties Box Elder County, UT, Cache County, UT, Davis County, UT, Duchesne County, UT, Juab County, UT, Millard County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Sanpete County, UT, Summit County, UT, Tooele County, UT, Utah County, UT, Wasatch County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 86 km from the middle of the area, began a volume at 21:22 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 |
|---|---|---|---|
| Sep 6, 7:05 PM MDT | TSTM WND GST 62 | Duchesne, UT | US-40 @ STARVATION - 5720 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 12:00Z, 9.4 hours before the alert went out and 19 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
- 3666 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
311 WWUS85 KSLC 052121 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 321 PM MDT WED SEP 5 2012 UTZ479-061000- /O.NEW.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ /O.CON.KSLC.FW.W.0028.000000T0000Z-120906T0200Z/ WASATCH MOUNTAINS- 321 PM MDT WED SEP 5 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 479 BELOW 8000 FEET... ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 479 BELOW 8000 FEET... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING BELOW 8000 FEET FOR WIND AND LOW RELATIVE HUMIDITY... WHICH IS IN EFFECT FROM NOON TO 8 PM MDT THURSDAY. * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS OF 15-20 MPH WITH GUSTS OVER 30 MPH THIS AFTERNOON AND EARLY EVENING WILL DIMINISH LATER THIS EVENING. WEST WINDS WILL DEVELOP AGAIN THURSDAY AFTERNOON WITH SPEEDS OF 15 TO 25 MPH AND GUSTS NEAR 35 MPH EXPECTED. * RELATIVE HUMIDITY...LOWERING TO NEAR 10 PERCENT BOTH THIS AFTERNOON AND AGAIN THURSDAY AFTERNOON. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ UTZ480-061000- /O.NEW.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ UINTA MOUNTAINS- 321 PM MDT WED SEP 5 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 480 BELOW 8000 FEET... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING BELOW 8000 FEET FOR WIND AND LOW RELATIVE HUMIDITY... WHICH IS IN EFFECT FROM NOON TO 8 PM MDT THURSDAY. * AFFECTED AREA...FIRE WEATHER ZONE 480 UINTA MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS OF 15-25 MPH AND GUSTS NEAR 35 MPH ARE EXPECTED BY THURSDAY AFTERNOON. * RELATIVE HUMIDITY...LOWERING TO BETWEEN 10 AND 15 PERCENT DURING THE AFTERNOON. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ UTZ478-492-061000- /O.NEW.KSLC.FW.A.0018.120906T1800Z-120907T0200Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- 321 PM MDT WED SEP 5 2012 ...FIRE WEATHER WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY EVENING FOR DRY LIGHTNING FOR FIRE WEATHER ZONES 478 AND 492... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A FIRE WEATHER WATCH FOR DRY LIGHTNING...WHICH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT AND FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT. * THUNDERSTORMS...DRY HIGH-BASED THUNDERSTORMS WILL DEVELOP ACROSS THE WEST CENTRAL VALLEYS AND GREAT SALT LAKE DESERT BY THURSDAY. THESE THUNDERSTORMS WILL CONTINUE INTO EARLY THURSDAY EVENING WHEN THE CHANCES FOR WETTING RAINS WILL INCREASE. * OUTFLOW WINDS...ERRATIC AND GUSTY WINDS UP TO 45 MPH ARE POSSIBLE...ESPECIALLY DURING THE LATE AFTERNOON AND EARLY EVENING HOURS. * IMPACTS...DRY LIGHTNING WILL BRING THE POTENTIAL FOR NUMEROUS FIRE STARTS. THE ASSOCIATED GUSTY AND ERRATIC WINDS MAY RESULT IN EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FIRE WEATHER WATCH MEANS THAT THERE IS A POTENTIAL FOR CRITICAL FIRE WEATHER CONDITIONS. CONTINUE TO MONITOR FOR THE LATEST FORECASTS AND FOR POSSIBLE RED FLAG WARNINGS. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
3 follow-up statements
407 WWUS85 KSLC 060930 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 330 AM MDT THU SEP 6 2012 UTZ478-492-061730- /O.UPG.KSLC.FW.A.0018.120906T1800Z-120907T0200Z/ /O.EXA.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- 330 AM MDT THU SEP 6 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478 AND 492... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT AND FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT. * WINDS...WESTERLY WINDS OF 15-25 MPH AND GUSTS NEAR 35 MPH ARE EXPECTED BY THIS AFTERNOON. * RELATIVE HUMIDITY...LOWERING TO BETWEEN 10 AND 15 PERCENT DURING THE AFTERNOON. * THUNDERSTORMS...DRY HIGH-BASED THUNDERSTORMS WILL DEVELOP ACROSS THE WEST CENTRAL VALLEYS AND GREAT SALT LAKE DESERT BY THURSDAY. THESE THUNDERSTORMS WILL CONTINUE INTO EARLY THURSDAY EVENING WHEN THE CHANCES FOR WETTING RAINS WILL INCREASE. * OUTFLOW WINDS...ERRATIC AND GUSTY WINDS UP TO 45 MPH ARE POSSIBLE...ESPECIALLY DURING THE LATE AFTERNOON AND EARLY EVENING HOURS. * IMPACTS...DRY LIGHTNING WILL BRING THE POTENTIAL FOR NUMEROUS FIRE STARTS. THE ASSOCIATED GUSTY AND ERRATIC WINDS MAY RESULT IN EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ UTZ479-480-061730- /O.CON.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ WASATCH MOUNTAINS-UINTA MOUNTAINS- 330 AM MDT THU SEP 6 2012 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 479 AND 480 BELOW 8000 FEET... * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET AND FIRE WEATHER ZONE 480 UINTA MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS OF 15-25 MPH AND GUSTS NEAR 35 MPH ARE EXPECTED BY THIS AFTERNOON. * RELATIVE HUMIDITY...LOWERING TO BETWEEN 10 AND 15 PERCENT DURING THE AFTERNOON. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
494 WWUS85 KSLC 061745 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1145 AM MDT THU SEP 6 2012 UTZ478-492-070200- /O.CON.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- 1145 AM MDT THU SEP 6 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478 AND 492... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT AND FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT. * WINDS...WESTERLY WINDS OF 15-25 MPH AND GUSTS NEAR 35 MPH ARE EXPECTED BY THIS AFTERNOON. * RELATIVE HUMIDITY...LOWERING TO BETWEEN 10 AND 15 PERCENT DURING THE AFTERNOON. * THUNDERSTORMS...DRY HIGH-BASED THUNDERSTORMS WILL DEVELOP ACROSS THE WEST CENTRAL UTAH WEST DESERT AND SALT LAKE DESERT THIS AFTERNOON. THESE THUNDERSTORMS WILL CONTINUE INTO EARLY THIS EVENING WHEN THE CHANCES FOR WETTING RAINS WILL INCREASE. * OUTFLOW WINDS...ERRATIC AND GUSTY WINDS UP TO 45 MPH ARE POSSIBLE...ESPECIALLY DURING THE LATE AFTERNOON AND EARLY EVENING HOURS. * IMPACTS...DRY LIGHTNING WILL BRING THE POTENTIAL FOR NUMEROUS FIRE STARTS. THE ASSOCIATED GUSTY AND ERRATIC WINDS MAY RESULT IN EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ UTZ479-480-070200- /O.CON.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ WASATCH MOUNTAINS-UINTA MOUNTAINS- 1145 AM MDT THU SEP 6 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 479 AND 480 BELOW 8000 FEET... * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET AND FIRE WEATHER ZONE 480 UINTA MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS OF 15-25 MPH AND GUSTS NEAR 35 MPH ARE EXPECTED BY THIS AFTERNOON. * RELATIVE HUMIDITY...LOWERING TO BETWEEN 10 AND 15 PERCENT DURING THE AFTERNOON. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
234 WWUS85 KSLC 062105 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 305 PM MDT THU SEP 6 2012 UTZ478-492-070200- /O.CON.KSLC.FW.W.0029.000000T0000Z-120907T0200Z/ SALT LAKE DESERT-CENTRAL UTAH WEST DESERT- 305 PM MDT THU SEP 6 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING DRY LIGHTNING FOR FIRE WEATHER ZONES 478 AND 492... * AFFECTED AREA...FIRE WEATHER ZONE 478 SALT LAKE DESERT AND FIRE WEATHER ZONE 492 CENTRAL UTAH WEST DESERT. * THUNDERSTORMS...DRY HIGH-BASED THUNDERSTORMS HAVE DEVELOPED ACROSS THE CENTRAL UTAH WEST DESERT AND SALT LAKE DESERT THIS AFTERNOON. THESE THUNDERSTORMS WILL CONTINUE INTO EARLY THIS EVENING WHEN THE CHANCES FOR WETTING RAINS WILL INCREASE. * OUTFLOW WINDS...ERRATIC AND GUSTY WINDS UP TO 45 MPH ARE POSSIBLE. * IMPACTS...DRY LIGHTNING AND VERY DRY FUELS WILL BRING THE POTENTIAL FOR NUMEROUS FIRE STARTS. THE ASSOCIATED GUSTY AND ERRATIC WINDS MAY RESULT IN EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ UTZ479-480-070200- /O.CON.KSLC.FW.W.0029.000000T0000Z-120907T0200Z/ WASATCH MOUNTAINS-UINTA MOUNTAINS- 305 PM MDT THU SEP 6 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 479 AND 480 BELOW 8000 FEET... * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET AND FIRE WEATHER ZONE 480 UINTA MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS OF 15-25 MPH AND GUSTS NEAR 30 MPH. * RELATIVE HUMIDITY...HUMIDITIES WILL HOVER AROUND 15 PERCENT THROUGH LATE THIS AFTERNOON...THE SLOWLY INCREASE EARLY THIS EVENING AHEAD OF PRECIPITATION MOVING IN FROM THE WEST. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:24 AM MDT | Red Flag Warning | SLC | Cache, Morgan, Rich, Salt Lake, Summit, Utah and 2 more | 17 hr |
| Sep 5, 3:21 PM MDT | Fire Weather Watch | SLC | Box Elder, Davis, Juab, Millard, Salt Lake, Sanpete and 2 more | 12 hr |
Nearby
Red Flag Warnings in Utah, 2012Every red flag warning in 2012
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.