Alert archive / Utah / Mesoscale Discussions in 2005

Mesoscale Discussion 2001

August 16, 200511 counties in Utah

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2005, 6:35 PM MDT for 11 counties in Utah. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Aug 16, 2005, 6:35 PM MDT (00:35 UTC)
Expired
Aug 16, 2005, 8:30 PM MDT
In force
115 min
Issued by
the Storm Prediction Center

Counties Carbon County, UT, Davis County, UT, Duchesne County, UT, Emery County, UT, Grand County, UT, Salt Lake County, UT, Sanpete County, UT, Summit County, UT, Uintah County, UT, Utah County, UT, Wasatch County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.6 hours before the alert went out and 119 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.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 00:00Z on 2005-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 663 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 00:00Z on 2005-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
663 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1731 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
115 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
ACUS11 KWNS 170035
SWOMCD
SPC MCD 170035 
COZ000-UTZ000-WYZ000-170230-

MESOSCALE DISCUSSION 2001
NWS STORM PREDICTION CENTER NORMAN OK
0735 PM CDT TUE AUG 16 2005

AREAS AFFECTED...CENTRAL/ERN UT

CONCERNING...SEVERE THUNDERSTORM WATCH 725...

VALID 170035Z - 170230Z

CLUSTER OF STG-SVR STORMS WILL MOVE ACROSS THE WASATCH FRONT IN THE
NEXT 1-2 HRS WITH DMGG WINDS THE PRIMARY SVR THREAT. ISOLATED SVR
THREAT WILL CONTINUE TO MOVE EAST OF WW 725 ACROSS ERN UT INTO WRN
CO OVER THE NEXT FEW HRS. HOWEVER...COVERAGE OF SVR WILL LIKELY
REMAIN SUFFICIENTLY LOW THAT A NEW WW EAST OF 725 IS NOT
ANTICIPATED. 

ORGANIZED CONVECTIVE LINE WILL MOVE ACROSS THE SLC METRO AREA AND
POINTS SOUTH ALONG THE WASATCH FRONT THROUGH 02Z. DMGG WINDS ARE
ANTICIPATED TO BE THE PRIMARY THREAT WITH THIS CONVECTION AS STEEP
LOW LEVEL LAPSE RATES EXIST BENEATH AROUND 1000 J/KG OF MLCAPE /PER
00Z SLC SOUNDING/. FURTHER EAST...DEEP LAYER SHEAR AND INSTABILITY
/40 KTS DEEP LAYER HEAR AND 1000 J/KG OF MLCAPE PER THE 00Z GJT
SOUNDING/ WILL REMAIN SUFFICIENT FOR SOME SVR HAIL POTENTIAL WITH
THE STRONGEST STORMS AS THEY MOVE EAST OF WW 725 INTO ERN UT/WRN CO.
IT IS ANTICIPATED THAT AN ISOLATED SVR THREAT IN THIS AREA SHOULD
PRELUDE THE NEED FOR ANOTHER WW.

..CROSBIE.. 08/17/2005

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...GJT...SLC...

41221278 41081311 40751260 40141220 39611185 38791165
38411139 38271070 38611027 38700942 39150870 40310843
40970998 41041125

Nearby

Mesoscale Discussions in Utah, 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.