Alert archive / Utah / Mesoscale Discussions in 2005
Mesoscale Discussion 2249
The Storm Prediction Center issued this mesoscale discussion at Sep 21, 2005, 3:04 PM MDT for 4 counties in Colorado; 18 counties in Utah; Sweetwater County, Uinta County, Wyoming. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Sep 21, 2005, 3:04 PM MDT (21:04 UTC)
- Expired
- Sep 21, 2005, 5:00 PM MDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
All 24 counties
Garfield County, CO, Mesa County, CO, Moffat County, CO, Rio Blanco County, CO, Box Elder County, UT, Cache County, UT, Carbon County, UT, Daggett County, UT, Davis County, UT, Duchesne County, UT, Emery County, UT, Grand County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Summit County, UT, Tooele County, UT, Uintah County, UT, Utah County, UT, Wasatch County, UT, Wayne County, UT, Weber County, UT, Sweetwater County, WY, Uinta County, WY
The radar
The Salt Lake City radar (KMTX), 211 km from the middle of the area, began a volume at 21:06 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 12:00Z, 9.1 hours before the alert went out and 143 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
- 1237 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 212104 SWOMCD SPC MCD 212104 WYZ000-COZ000-UTZ000-IDZ000-212300- MESOSCALE DISCUSSION 2249 NWS STORM PREDICTION CENTER NORMAN OK 0404 PM CDT WED SEP 21 2005 AREAS AFFECTED...NRN/ERN UT...WRN CO AND SWRN WY CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 212104Z - 212300Z THREAT FOR ISOLATED SVR WIND/HAIL WILL EXIST FOR THE REMAINDER OF THE AFTERNOON ACROSS THE AREA IN ASSOCIATION WITH STRONG UPPER TROUGH MOVING ACROSS NRN UT. OVERALL MARGINAL NATURE OF SVR THREAT IS EXPECTED TO LIMIT THE NEED FOR A WW. LATEST VIS IMAGERY INDICATES CIRRUS WAS CLEARING AHEAD OF CONVECTIVE LINE OVER ERN UT. CONSEQUENTLY...CONTINUED SFC HEATING WILL SUPPORT MLCAPE VALUES RISING TO AROUND 1000 J/KG AND INTENSIFICATION OF CONVECTIVE LINE OVER THE NEXT FEW HRS. THE COMBINATION OF STRONG SHEAR / AROUND 50 KTS ACROSS ERN UT/WRN CO/ AND MODERATE INSTABILITY WILL SUPPORT AT LEAST SOME ISOLATED WIND/HAIL THREAT WITH THE STRONGEST STORMS WITHIN THE CONVECTIVE LINE. FURTHER NW...STEEP MID LEVEL LAPSE RATES UNDERNEATH THE UPPER LOW WILL SUPPORT RISK FOR ISOLATED MARGINALLY SVR HAIL OVER NRN UT AND FAR SWRN WY BEFORE ONSET OF DIURNAL COOLING AROUND 01Z. ..CROSBIE.. 09/21/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...CYS...RIW...GJT...SLC...PIH... 42181065 41591326 41121366 39971346 39491105 38491151 37941140 37721062 38100885 39310790 40160741 41100741 42350850
Nearby
Mesoscale Discussions in Utah, 2005Mesoscale Discussions in Colorado, 2005Mesoscale Discussions in Wyoming, 2005Every mesoscale discussion in 2005
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.