Alert archive / Utah / Red Flag Warnings in 2017
Red Flag Warning 2, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at May 25, 2017, 9:45 AM MDT for Washington County, Utah. It took effect at May 25, 2017, 3:00 PM MDT. It was in force for 5 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 25, 2017, 9:45 AM MDT (15:45 UTC)
- In effect from
- May 25, 2017, 3:00 PM MDT
- Expired
- May 25, 2017, 8:00 PM MDT
- In force
- 5 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 15:48 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, 3.8 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
- 3635 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
954 WWUS85 KSLC 251545 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 945 AM MDT Thu May 25 2017 UTZ497-252345- /O.NEW.KSLC.FW.W.0002.170525T2100Z-170526T0200Z/ Mojave Desert- 945 AM MDT Thu May 25 2017 ...RED FLAG WARNING IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING 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 for wind and low relative humidity...which is in effect from 3 PM this afternoon to 8 PM MDT this evening. * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert below 4000 ft. * WINDS...West southwest 15-25 mph with gusts 30-35 mph. * RELATIVE HUMIDITY...4-8%. * IMPACTS...Gusty winds and low RH will combine to cause critical fire weather conditions, especially on southwest and south aspects where fuels are most critical. 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
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 6:28 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Tooele | 32 min |
| May 24, 6:47 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Salt Lake, Tooele | 28 min |
| May 24, 7:13 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Morgan, Salt Lake, Weber | 32 min |
| May 24, 8:02 PM MDT | Special Weather Statement | SLC | Cache | 28 min |
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.