Alert archive / Utah / Red Flag Warnings in 2012
Red Flag Warning 28, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Sep 5, 2012, 3:24 AM MDT for 8 counties in Utah. It took effect at Sep 5, 2012, 12:00 PM MDT. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Sep 5, 2012, 3:24 AM MDT (09:24 UTC)
- In effect from
- Sep 5, 2012, 12:00 PM MDT
- Expired
- Sep 5, 2012, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Salt Lake City, UT
Counties Cache County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Summit County, UT, Utah County, UT, Wasatch County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 84 km from the middle of the area, began a volume at 09:28 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
Salt Lake City I, UT (KSLC), launched 00:00Z, 9.4 hours before the alert went out and 38 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
- 4385 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
191 WWUS85 KSLC 050924 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 324 AM MDT WED SEP 5 2012 UTZ492-051030- /O.CAN.KSLC.FW.A.0017.120905T1800Z-120906T0300Z/ CENTRAL UTAH WEST DESERT- 324 AM MDT WED SEP 5 2012 ...FIRE WEATHER WATCH IS CANCELLED FOR DRY LIGHTNING FOR FIRE WEATHER ZONE 492... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS CANCELLED THE FIRE WEATHER WATCH. MOISTURE WILL MOVE IN SLOWER THAN EXPECTED BUT WHEN IT DOES SURGE IN ON THURSDAY IT SHOULD BE DEEP ENOUGH FOR SCATTERED WET THUNDERSTORMS. $$ UTZ479-051730- /O.NEW.KSLC.FW.W.0028.120905T1800Z-120906T0200Z/ WASATCH MOUNTAINS- 324 AM MDT WED SEP 5 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 479 BELOW 8000 FEET... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING BELOW 8000 FEET FOR LOW RH AND GUSTY WINDS...WHICH IS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING. * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET...MAINLY NORTH OF I-80. THIS ALSO INCLUDES THE BEAR RIVER VALLEY. * WINDS...WEST WINDS WILL INCREASE TO 15-20 MPH WITH GUSTS OVER 30 MPH BY SHORTLY AFTER NOON TODAY. * RELATIVE HUMIDITY...LOWERING TO NEAR 10 PERCENT. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
2 follow-up statements
561 WWUS85 KSLC 051600 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1000 AM MDT WED SEP 5 2012 UTZ479-052200- /O.CON.KSLC.FW.W.0028.120905T1800Z-120906T0200Z/ WASATCH MOUNTAINS- 1000 AM MDT WED SEP 5 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 479 BELOW 8000 FEET... * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS WILL INCREASE TO 15-20 MPH WITH GUSTS OVER 30 MPH THIS AFTERNOON. * RELATIVE HUMIDITY...LOWERING TO NEAR 10 PERCENT. * 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. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
311 WWUS85 KSLC 052121 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 321 PM MDT WED SEP 5 2012 UTZ479-061000- /O.NEW.KSLC.FW.W.0029.120906T1800Z-120907T0200Z/ /O.CON.KSLC.FW.W.0028.000000T0000Z-120906T0200Z/ WASATCH MOUNTAINS- 321 PM MDT WED SEP 5 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 479 BELOW 8000 FEET... ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 479 BELOW 8000 FEET... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING BELOW 8000 FEET FOR WIND AND LOW RELATIVE HUMIDITY... WHICH IS IN EFFECT FROM NOON TO 8 PM MDT THURSDAY. * AFFECTED AREA...FIRE WEATHER ZONE 479 WASATCH MOUNTAINS BELOW 8000 FEET. * WINDS...WEST WINDS OF 15-20 MPH WITH GUSTS OVER 30 MPH THIS AFTERNOON AND EARLY EVENING WILL DIMINISH LATER THIS EVENING. WEST WINDS WILL DEVELOP AGAIN THURSDAY AFTERNOON WITH SPEEDS OF 15 TO 25 MPH AND GUSTS NEAR 35 MPH EXPECTED. * RELATIVE HUMIDITY...LOWERING TO NEAR 10 PERCENT BOTH THIS AFTERNOON AND AGAIN THURSDAY AFTERNOON. * IMPACTS...COMBINATION OF GUSTY WINDS...LOW RH AND DRY FUELS WILL SUPPORT EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ 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)
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:21 PM MDT | Fire Weather Watch | SLC | Box Elder, Davis, Juab, Millard, Salt Lake, Sanpete and 2 more | 12 hr |
| Sep 5, 3:21 PM MDT | Red Flag Warning | SLC | Box Elder, Cache, Davis, Duchesne, Juab, Millard and 9 more | 29 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.