Alert archive / Utah / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 13, NWS Salt Lake City, UT

June 12, 2014Rich County, Summit County, Utah; Uinta County, Wyoming

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 12, 2014, 6:28 PM MDT for Rich County, Summit County, Utah; Uinta County, Wyoming. It was in force for 32 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 12, 2014, 6:28 PM MDT (00:28 UTC)
Expired
Jun 12, 2014, 7:00 PM MDT
In force
32 min
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon

Counties Rich County, UT, Summit County, UT, Uinta County, WY

The radar

The Salt Lake City radar (KMTX), 134 km from the middle of the area, began a volume at 00:31 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.

What was reported inside it

TimeReportWhereRemark
Jun 12, 6:35 PM MDTTSTM WND GST 60Evanston, WYEVANSTON ASOS
Jun 12, 6:40 PM MDTNON-TSTM WND GST 61Bear River, UTSR-16 @ MP1 - 6533 FT
Jun 12, 6:45 PM MDTNON-TSTM WND GST 60Evanston, WYEVANSTON - BURNS FIELD - 7162 FT

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.5 hours before the alert went out and 106 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 2014-06-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°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 2014-06-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3606 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

618 
WUUS55 KSLC 130028
SVRSLC
UTC033-043-WYC041-130100-
/O.NEW.KSLC.SV.W.0013.140613T0028Z-140613T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
628 PM MDT THU JUN 12 2014

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL SUMMIT COUNTY IN UTAH...
  SOUTHEASTERN RICH COUNTY IN UTAH...
  WESTERN UINTA COUNTY IN SOUTHWEST WYOMING...

* UNTIL 700 PM MDT

* AT 626 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED 8 MILES WEST OF EVANSTON...AND MOVING EAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EVANSTON...RAGEN...WAHSATCH...ALMY...ALTAMONT AND PIEDMONT. 

INTERSTATE 80 FROM WEST OF WAHSATCH TO EAST OF EVANSTON WILL BE 
IMPACTED BY THIS STORM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND DEADLY LIGHTNING. 
FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR 
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT 
DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4109 11052 4105 11112 4140 11130 4159 11086
      4158 11074
TIME...MOT...LOC 0026Z 249DEG 31KT 4126 11112 

$$

KRUSE
2 follow-up statements
766 
WWUS55 KSLC 130039
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
639 PM MDT THU JUN 12 2014

UTC033-043-WYC041-130100-
/O.CON.KSLC.SV.W.0013.000000T0000Z-140613T0100Z/
SUMMIT UT-RICH UT-UINTA WY-
639 PM MDT THU JUN 12 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM MDT
FOR NORTHWESTERN SUMMIT...SOUTHEASTERN RICH AND WESTERN UINTA
COUNTIES...

AT 639 PM MDT...TRAINED WEATHER SPOTTERS IN EVANSTON REPORTED A 
SEVERE THUNDERSTORM PRODUCING DAMAGING WINDS OF 60 MPH. THIS STORM 
WAS LOCATED OVER EVANSTON...MOVING EAST AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
EVANSTON...RAGEN...WAHSATCH...ALMY...ALTAMONT AND PIEDMONT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND DEADLY LIGHTNING. 
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF 
YOUR HOME OR BUSINESS. 

&&

LAT...LON 4109 11052 4106 11103 4140 11130 4159 11086
      4158 11074
TIME...MOT...LOC 0039Z 249DEG 31KT 4130 11098 

$$

KRUSE
218 
WWUS55 KSLC 130059
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
659 PM MDT THU JUN 12 2014

UTC033-043-WYC041-130108-
/O.EXP.KSLC.SV.W.0013.000000T0000Z-140613T0100Z/
SUMMIT UT-RICH UT-UINTA WY-
659 PM MDT THU JUN 12 2014

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN SUMMIT...
SOUTHEASTERN RICH AND WESTERN UINTA COUNTIES WILL EXPIRE AT 700 PM
MDT...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER GUSTY WINDS
ARE STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4109 11052 4106 11103 4140 11130 4159 11086
      4158 11074
TIME...MOT...LOC 0056Z 249DEG 31KT 4130 11098 

$$

KRUSE

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 12, 6:01 PM MDTSevere Thunderstorm WarningSLCMorgan, Rich, Summit29 min
Jun 12, 7:49 PM MDTSpecial Weather StatementSLCBox Elder41 min
Jun 13, 3:46 AM MDTWind AdvisorySLC18 hr
Jun 13, 2:19 PM MDTFire Weather WatchSLCBeaver, Box Elder, Davis, Garfield, Iron, Kane and 6 more24 hr

Nearby

Severe Thunderstorm Warnings in Utah, 2014Severe Thunderstorm Warnings in Wyoming, 2014Every severe thunderstorm warning in 2014

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.