Alert archive / Utah / Red Flag Warnings in 2017
Red Flag Warning 1, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at May 5, 2017, 12:22 PM MDT for Washington County, Utah. It took effect at May 6, 2017, 10:00 AM MDT. It was in force for 10 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 5, 2017, 12:22 PM MDT (18:22 UTC)
- In effect from
- May 6, 2017, 10:00 AM MDT
- Expired
- May 6, 2017, 8:00 PM MDT
- In force
- 10 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 18:28 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
Las Vegas, NV (KVEF), launched 12:00Z, 6.4 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
- 3911 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
614 WWUS85 KSLC 051822 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1222 PM MDT Fri May 5 2017 UTZ497-061300- /O.NEW.KSLC.FW.W.0001.170506T1600Z-170507T0200Z/ Mojave Desert- 1222 PM MDT Fri May 5 2017 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497 BELOW 3500 FEET... 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 10 AM to 8 PM MDT Saturday. * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert below 3500 feet which includes St George and surrounding areas. * WINDS...Southwest 20 to 30 mph with gusts to 40 mph. * RELATIVE HUMIDITY...Lowering to near 10 percent. * IMPACTS...A combination of gusty winds and low humidity will create the potential for rapid fire growth. 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. && $$ Rogowski For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
2 follow-up statements
043 WWUS85 KSLC 060945 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 345 AM MDT Sat May 6 2017 UTZ497-062130- /O.CON.KSLC.FW.W.0001.170506T1600Z-170507T0200Z/ Mojave Desert- 345 AM MDT Sat May 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497 BELOW 3500 FEET... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest 20 to 30 mph with gusts to 40 mph. * RELATIVE HUMIDITY...Lowering to near 10 percent. * IMPACTS...A combination of gusty winds and low humidity will create the potential for rapid fire growth. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
814 WWUS85 KSLC 061925 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 125 PM MDT Sat May 6 2017 UTZ497-070200- /O.CON.KSLC.FW.W.0001.000000T0000Z-170507T0200Z/ Mojave Desert- 125 PM MDT Sat May 6 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 497 BELOW 3500 FEET... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest 20 to 30 mph with gusts to 40 mph. * RELATIVE HUMIDITY...Lowering to near 10 percent. * IMPACTS...A combination of gusty winds and low humidity will create the potential for rapid fire growth. 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. && $$ Rogowski 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 |
|---|---|---|---|---|
| May 5, 1:47 PM MDT | Flash Flood Watch | SLC | 14 min | |
| May 5, 2:01 PM MDT | Flood Watch | SLC | 21 hr | |
| May 5, 2:05 PM MDT | Wind Advisory | SLC | 30 hr |
Nearby
Red Flag Warnings in Utah, 2017Every red flag warning in 2017
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.