Alert archive / Utah / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 39, NWS Salt Lake City, UT

August 23, 2016Iron County, Washington County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 23, 2016, 6:10 PM MDT for Iron County, Washington County, Utah. It was in force for 35 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
Aug 23, 2016, 6:10 PM MDT (00:10 UTC)
Expired
Aug 23, 2016, 6:45 PM MDT
In force
35 min
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon

Counties Iron County, UT, Washington County, UT

The radar

The Cedar City radar (KICX), 97 km from the middle of the area, began a volume at 00:12 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 00:00Z, 0.2 hours before the alert went out and 195 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, Las Vegas, NV at 00:00Z on 2016-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 731 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, Las Vegas, NV at 00:00Z on 2016-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 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
731 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
2488 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted.

311 
WUUS55 KSLC 240010
SVRSLC
UTC021-053-240045-
/O.NEW.KSLC.SV.W.0039.160824T0010Z-160824T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
610 PM MDT TUE AUG 23 2016

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN IRON COUNTY IN UTAH...
  NORTHWESTERN WASHINGTON COUNTY IN UTAH...

* UNTIL 645 PM MDT

* AT 609 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN
  EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BEAVER DAM...AND
  MOVING SOUTH TO SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BEAVER DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. 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 3769 11392 3746 11379 3740 11405 3766 11406
      3767 11405
TIME...MOT...LOC 0009Z 345DEG 10KT 3760 11402 

$$

GM
2 follow-up statements
699 
WWUS55 KSLC 240026
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
626 PM MDT TUE AUG 23 2016

UTC021-053-240045-
/O.CON.KSLC.SV.W.0039.000000T0000Z-160824T0045Z/
IRON UT-WASHINGTON UT-
626 PM MDT TUE AUG 23 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM MDT
FOR SOUTHWESTERN IRON AND NORTHWESTERN WASHINGTON COUNTIES...

AT 625 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR BEAVER DAM...AND IS NEARLY
STATIONARY LOCATED ALONG THE UTAH NEVADA BORDER.

LOCATIONS IMPACTED INCLUDE...
BEAVER DAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE
HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. 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 3769 11392 3746 11379 3740 11405 3766 11406
      3767 11405
TIME...MOT...LOC 0025Z 345DEG 10KT 3756 11401 

$$

GM
985 
WWUS55 KSLC 240042
SVSSLC

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
642 PM MDT TUE AUG 23 2016

UTC021-053-240051-
/O.EXP.KSLC.SV.W.0039.000000T0000Z-160824T0045Z/
IRON UT-WASHINGTON UT-
642 PM MDT TUE AUG 23 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN IRON AND
NORTHWESTERN WASHINGTON COUNTIES WILL EXPIRE AT 645 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 SMALL HAIL
AND GUSTY WINDS UP TO 50 MPH ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 3769 11392 3746 11379 3740 11405 3766 11406
      3767 11405
TIME...MOT...LOC 0040Z 345DEG 10KT 3756 11401 

$$

GM

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 23, 6:33 PM MDTSpecial Weather StatementSLCWashington27 min
Aug 23, 6:54 PM MDTFlash Flood WarningSLCKane3 hr
Aug 24, 2:09 PM MDTSevere Thunderstorm WarningSLCIron25 min
Aug 24, 3:42 PM MDTSevere Thunderstorm WarningSLCGarfield48 min

Nearby

Severe Thunderstorm Warnings in Utah, 2016Every severe thunderstorm warning in 2016

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.