Alert archive / Utah / Red Flag Warnings in 2012
Red Flag Warning 4, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at May 11, 2012, 3:45 PM MDT for Washington County, Utah. It took effect at May 12, 2012, 12:00 AM 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
- May 11, 2012, 3:45 PM MDT (21:45 UTC)
- In effect from
- May 12, 2012, 12:00 AM MDT
- Expired
- May 12, 2012, 8:03 AM MDT
- In force
- 8 hr
- Issued by
- NWS Salt Lake City, UT
County Washington County, UT
The radar
The Cedar City radar (KICX), 66 km from the middle of the area, began a volume at 21:47 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
Las Vegas, NV (KVEF), launched 12:00Z, 9.8 hours before the alert went out and 207 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
- 5127 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- -31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
215 WWUS85 KSLC 112145 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 345 PM MDT FRI MAY 11 2012 UTZ497-121200- /O.NEW.KSLC.FW.W.0004.120512T0600Z-120512T1800Z/ MOJAVE DESERT- 345 PM MDT FRI MAY 11 2012 ...RED FLAG WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO NOON MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497 BELOW 4000 FEET... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING BELOW 4000 FEET FOR WIND AND LOW RELATIVE HUMIDITY... WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO NOON MDT SATURDAY. * AFFECTED AREA...FIRE WEATHER ZONE 497 MOJAVE DESERT BELOW 4000 FEET. SPECIFICALLY FROM THE NEW ST GEORGE AIRPORT NORTH TO THE TOWN OF WASHINGTON AND TO THE IRON COUNTY LINE. THIS WARNING ALSO INCLUDES WESTERN WASHINGTON COUNTY NEAR THE SOUTHWEST SLOPES OF THE BEAVER DAM AND BULL VALLEY MOUNTAINS. * WINDS...NORTHEAST 10 TO 20 MPH WITH GUSTS UP TO 40 MPH. * RELATIVE HUMIDITY...ONLY RISING TO 10 TO 15 PERCENT IN THESE AREAS OVERNIGHT. * IMPACTS...THE COMBINATION OF DRY FUELS...LOW RELATIVE HUMIDITY VALUES...AND GUSTY NORTHEAST WINDS WILL RESULT IN HAZARDOUS FIRE WEATHER CONDITIONS THROUGH SATURDAY MORNING. 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. && $$ ROGOWSKI FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
2 follow-up statements
029 WWUS85 KSLC 120925 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 325 AM MDT SAT MAY 12 2012 UTZ497-121800- /O.CON.KSLC.FW.W.0004.000000T0000Z-120512T1800Z/ MOJAVE DESERT- 325 AM MDT SAT MAY 12 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497 BELOW 4000 FEET... * AFFECTED AREA...FIRE WEATHER ZONE 497 MOJAVE DESERT BELOW 4000 FEET...SPECIFICALLY ON THE SOUTHERN SLOPES OF THE BEAVER DAM MOUNTAINS. * WINDS...NORTHEAST 10 TO 20 MPH WITH GUSTS OVER 30 MPH. * RELATIVE HUMIDITY...AS LOW AS 12 PERCENT. * IMPACTS...THE COMBINATION OF DRY FUELS...LOW RELATIVE HUMIDITY VALUES...AND GUSTY NORTHEAST WINDS WILL RESULT IN HAZARDOUS FIRE WEATHER CONDITIONS THROUGH THIS MORNING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND CRITICALLY DRY FUELS WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
157 WWUS85 KSLC 121403 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 803 AM MDT SAT MAY 12 2012 UTZ497-121515- /O.CAN.KSLC.FW.W.0004.000000T0000Z-120512T1800Z/ MOJAVE DESERT- 803 AM MDT SAT MAY 12 2012 ...RED FLAG WARNING IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS CANCELLED THE RED FLAG WARNING. THE GUSTY NORTH WINDS FROM THE OVERNIGHT HOURS HAVE DIMINISHED EARLY THIS MORNING...AND ARE NO LONGER IN WARNING CRITERIA. HUMIDITIES WILL REMAIN LOW TODAY. $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
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.