Alert archive / Utah / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 11, NWS Salt Lake City, UT

July 16, 2012Davis County, Salt Lake County, Tooele County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 16, 2012, 5:19 PM MDT for Davis County, Salt Lake County, Tooele County, Utah. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 16, 2012, 5:19 PM MDT (23:19 UTC)
Expired
Jul 16, 2012, 6:00 PM MDT
In force
41 min
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon

Counties Davis County, UT, Salt Lake County, UT, Tooele County, UT

The radar

The Salt Lake City radar (KMTX), 65 km from the middle of the area, began a volume at 23:19 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, 11.3 hours before the alert went out and 6 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 12:00Z on 2012-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 193 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2012-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 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
193 J/kg
Mixed-layer CIN
-166 J/kg
Mixed-layer LCL
1714 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
129 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.

351 
WUUS55 KSLC 162319
SVRSLC
UTC011-035-045-170000-
/O.NEW.KSLC.SV.W.0011.120716T2319Z-120717T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
519 PM MDT MON JUL 16 2012

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIS COUNTY IN UTAH
  NORTHERN SALT LAKE COUNTY IN UTAH
  EAST CENTRAL TOOELE COUNTY IN UTAH

* UNTIL 600 PM MDT

* AT 514 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR LAKE POINT...OR 9 MILES
  NORTHEAST OF TOOELE...MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  SALT LAKE CITY... UNIVERSITY OF UTAH... NORTH SALT LAKE... WOODS
  CROSS... BOUNTIFUL... FARMINGTON AND  AND  CENTERVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

&&

LAT...LON 4072 11217 4050 11217 4073 11247 4114 11215
      4094 11179 4085 11173 4087 11170 4081 11165
      4078 11166
TIME...MOT...LOC 2319Z 215DEG 29KT 4068 11219

$$

CRK
2 follow-up statements
232 
WWUS55 KSLC 162335 RRA
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
535 PM MDT MON JUL 16 2012

UTC011-035-045-170000-
/O.CON.KSLC.SV.W.0011.000000T0000Z-120717T0000Z/
TOOELE UT-SALT LAKE UT-DAVIS UT-
535 PM MDT MON JUL 16 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM MDT
FOR DAVIS...NORTHERN SALT LAKE AND NORTHEASTERN TOOELE COUNTIES...

AT 534 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 10 MILES WEST OF NORTH SALT
LAKE...OR ABOUT 8 MILES NORTHWEST OF WEST VALLEY CITY...MOVING
NORTHEAST AT 35 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  SALT LAKE CITY... UNIVERSITY OF UTAH... NORTH SALT LAKE... WOODS
  CROSS... BOUNTIFUL AND CENTERVILLE

LAT...LON 4078 11166 4072 11217 4063 11218 4081 11241
      4114 11215 4093 11180 4085 11173 4087 11170
      4080 11165
TIME...MOT...LOC 2336Z 215DEG 29KT 4079 11209

$$

CRK
772 
WWUS55 KSLC 162356
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
556 PM MDT MON JUL 16 2012

UTC011-035-045-170005-
/O.EXP.KSLC.SV.W.0011.000000T0000Z-120717T0000Z/
TOOELE UT-SALT LAKE UT-DAVIS UT-
556 PM MDT MON JUL 16 2012

...THE SEVERE THUNDERSTORM WARNING FOR DAVIS...NORTHERN SALT LAKE AND
NORTHEASTERN TOOELE COUNTIES WILL EXPIRE AT 600 PM MDT...

THE STORM HAS WEAKENED AND IS NO LONGER SEVERE. THEREFORE THE WARNING
HAS BEEN ALLOWED TO EXPIRE. A SIGNIFICANT WEATHER ADVISORY HAS BEEN 
ISSUED FOR PORTIONS OF NORTHERN SALT LAKE COUNTY AND DAVIS COUNTY. 
WIND GUSTS UP TO 55 MPH REMAIN POSSIBLE AS THE AREA OF STORMS MOVES 
NORTHWARD. 

LAT...LON 4078 11166 4072 11217 4063 11218 4081 11241
      4114 11215 4093 11180 4085 11173 4087 11170
      4080 11165
TIME...MOT...LOC 2355Z 180DEG 0KT 4078 11210

$$

KRUSE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 6:20 PM MDTSevere Thunderstorm WarningSLCEmery55 min
Jul 15, 8:06 PM MDTFlash Flood WarningSLCWashington4 hr
Jul 16, 1:04 PM MDTFlash Flood WarningSLCWayne3 hr
Jul 16, 1:13 PM MDTFlash Flood WarningSLCWashington11 hr
Jul 16, 1:24 PM MDTSpecial Weather StatementSLCTooele66 min
Jul 16, 1:37 PM MDTSevere Thunderstorm WarningSLCKane38 min
Jul 16, 1:49 PM MDTFlash Flood WarningSLCKane, Washington4 hr
Jul 16, 2:00 PM MDTSevere Thunderstorm WarningSLCBox Elder, Tooele43 min
Jul 16, 2:20 PM MDTSpecial Weather StatementSLC70 min
Jul 16, 2:26 PM MDTSpecial Weather StatementSLC49 min
Jul 16, 2:33 PM MDTSevere Thunderstorm WarningSLCKane27 min
Jul 16, 2:55 PM MDTFlash Flood WarningSLCKane3 hr
Jul 16, 3:01 PM MDTSpecial Weather StatementSLC44 min
Jul 16, 3:24 PM MDTSpecial Weather StatementSLCCarbon51 min
Jul 16, 4:10 PM MDTSevere Thunderstorm WarningSLCWashington50 min
Jul 16, 4:38 PM MDTSpecial Weather StatementSLCWeber67 min
Jul 16, 4:49 PM MDTSpecial Weather StatementSLC26 min
Jul 16, 4:54 PM MDTFlash Flood WarningSLCUtah50 min
Jul 16, 4:56 PM MDTSevere Thunderstorm WarningSLCWashington49 min
Jul 16, 5:00 PM MDTSpecial Weather StatementSLCRich60 min
Jul 16, 5:01 PM MDTFlash Flood WarningSLCWashington4 hr
Jul 16, 5:10 PM MDTSevere Thunderstorm WarningSLCSalt Lake, Utah50 min
Jul 16, 5:22 PM MDTSpecial Weather StatementSLCCache38 min
Jul 16, 5:28 PM MDTFlash Flood WarningSLCKane, Washington6 hr
Jul 16, 5:54 PM MDTSpecial Weather StatementSLCDavis, Salt Lake51 min

Nearby

Severe Thunderstorm Warnings in Utah, 2012Every severe thunderstorm warning in 2012

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.