Alert archive / Utah / Red Flag Warnings in 2015
Red Flag Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Aug 17, 2015, 1:58 PM MDT for Washington County, Utah. It took effect at Aug 18, 2015, 4:00 AM MDT. It was in force for 23 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
- Aug 17, 2015, 1:58 PM MDT (19:58 UTC)
- In effect from
- Aug 18, 2015, 4:00 AM MDT
- Expired
- Aug 19, 2015, 2:46 AM MDT
- In force
- 23 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 19:58 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, 8.0 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
- 4676 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
005 WWUS85 KSLC 171958 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 158 PM MDT MON AUG 17 2015 UTZ497-180400- /O.NEW.KSLC.FW.W.0002.150818T1000Z-150819T1000Z/ MOJAVE DESERT- 158 PM MDT MON AUG 17 2015 ...RED FLAG WARNING IN EFFECT FROM 4 AM TUESDAY TO 4 AM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 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 4 AM TUESDAY TO 4 AM MDT WEDNESDAY. * AFFECTED AREA...FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...NORTHEAST 15 TO 25 MPH WITH GUSTS TO 35 MPH...PARTICULARLY ALONG THE INTERSTATE 15 CORRIDOR AND ALONG THE MOUNTAINS OF WESTERN WASHINGTON COUNTY TUESDAY MORNING AND AGAIN TUESDAY NIGHT. * RELATIVE HUMIDITY...DROPPING BELOW 15 PERCENT TUESDAY MORNING...AND INTO THE SINGLE DIGITS TUESDAY AFTERNOON...RISING ABOVE 15 PERCENT TUESDAY NIGHT. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS TUESDAY INTO TUESDAY NIGHT. 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 CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ ROGOWSKI FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
4 follow-up statements
336 WWUS85 KSLC 180326 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 926 PM MDT MON AUG 17 2015 UTZ497-181200- /O.CON.KSLC.FW.W.0002.150818T1000Z-150819T1000Z/ MOJAVE DESERT- 926 PM MDT MON AUG 17 2015 ...RED FLAG WARNING REMAINS IN EFFECT FROM 4 AM TUESDAY TO 4 AM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497... THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A RED FLAG WARNING FOR WIND AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 4 AM TUESDAY TO 4 AM MDT WEDNESDAY. * AFFECTED AREA...FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...NORTHEAST 15 TO 25 MPH WITH GUSTS TO 35 MPH... PARTICULARLY ALONG THE INTERSTATE 15 CORRIDOR AND ALONG THE MOUNTAINS OF WESTERN WASHINGTON COUNTY TUESDAY MORNING AND AGAIN TUESDAY NIGHT. * RELATIVE HUMIDITY...DROPPING BELOW 15 PERCENT TUESDAY MORNING...AND INTO THE SINGLE DIGITS TUESDAY AFTERNOON... RISING ABOVE 15 PERCENT TUESDAY NIGHT. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS TUESDAY INTO TUESDAY NIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
620 WWUS85 KSLC 181000 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 400 AM MDT TUE AUG 18 2015 UTZ497-182200- /O.CON.KSLC.FW.W.0002.000000T0000Z-150819T1000Z/ MOJAVE DESERT- 400 AM MDT TUE AUG 18 2015 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 AM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497... * AFFECTED AREA...FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...LOCALIZED NORTHEAST 10 TO 20 MPH WITH GUSTS TO 30 MPH... PARTICULARLY ALONG THE INTERSTATE 15 CORRIDOR AND ALONG THE MOUNTAINS OF WESTERN WASHINGTON COUNTY THIS MORNING AND AGAIN TONIGHT. * RELATIVE HUMIDITY...DROPPING BELOW 15 PERCENT THIS MORNING...AND INTO THE SINGLE DIGITS THIS AFTERNOON... RISING ABOVE 15 PERCENT TONIGHT. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS THROUGH TONIGHT. 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 CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
551 WWUS85 KSLC 182043 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 243 PM MDT TUE AUG 18 2015 UTZ497-190445- /O.CON.KSLC.FW.W.0002.000000T0000Z-150819T1000Z/ MOJAVE DESERT- 243 PM MDT TUE AUG 18 2015 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 4 AM MDT WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497... * AFFECTED AREA...FIRE WEATHER ZONE 497 MOJAVE DESERT. * WINDS...LOCALIZED NORTHEAST 10 TO 20 MPH WITH GUSTS TO 30 MPH... PARTICULARLY ALONG THE INTERSTATE 15 CORRIDOR AND ALONG THE MOUNTAINS OF WESTERN WASHINGTON COUNTY DEVELOPING THIS EVENING AND LINGERING OVERNIGHT. * RELATIVE HUMIDITY...DROPPING BELOW 15 PERCENT THIS MORNING... AND INTO THE SINGLE DIGITS THIS AFTERNOON... RISING ABOVE 15 PERCENT LATER TONIGHT. * IMPACTS...THE COMBINATION OF LOW RELATIVE HUMIDITY AND GUSTY WINDS WILL CREATE HAZARDOUS FIRE WEATHER CONDITIONS THROUGH TONIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES CAN CONTRIBUTE TO EXTREME FIRE BEHAVIOR. && $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
551 WWUS85 KSLC 190846 RFWSLC URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE SALT LAKE CITY UT 246 AM MDT WED AUG 19 2015 UTZ497-191000- /O.CAN.KSLC.FW.W.0002.000000T0000Z-150819T1000Z/ MOJAVE DESERT- 246 AM MDT WED AUG 19 2015 ...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. $$ FOR MORE INFORMATION FROM NOAA/NATIONAL WEATHER SERVICE VISIT... HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
Nearby
Red Flag Warnings in Utah, 2015Every red flag warning in 2015
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.