Alert archive / Wyoming / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 1, NWS Salt Lake City, UT

May 15, 2021Uinta County, Wyoming

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 15, 2021, 1:18 PM MDT for Uinta County, Wyoming. It was in force for 27 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: May 15, 2021, 1:18 PM MDT (19:18 UTC)
Expired: May 15, 2021, 1:45 PM MDT
In force: 27 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Uinta County, WY

The radar

The Salt Lake City radar (KMTX), 188 km from the middle of the area, began a volume at 19:22 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, 7.3 hours before the alert went out and 149 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2778 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -27 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

204 
WUUS55 KSLC 151918
SVRSLC
WYC041-151945-
/O.NEW.KSLC.SV.W.0001.210515T1918Z-210515T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
118 PM MDT Sat May 15 2021

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  Southeastern Uinta County in southwestern Wyoming...

* Until 145 PM MDT

* At 118 PM MDT, a severe thunderstorm was located near Robertson, or
  31 miles west of Manila, moving east at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Uinta County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4107 11034 4123 11038 4133 11009 4125 11005
      4109 11005
TIME...MOT...LOC 1918Z 258DEG 12KT 4117 11028 

HAIL...1.00IN
WIND...60MPH
 
$$

Webber

2 follow-up statements

511 
WWUS55 KSLC 151934
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
134 PM MDT Sat May 15 2021

WYC041-151945-
/O.CON.KSLC.SV.W.0001.000000T0000Z-210515T1945Z/
Uinta WY-
134 PM MDT Sat May 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MDT
FOR EAST CENTRAL UINTA COUNTY...

At 134 PM MDT, a severe thunderstorm was located 9 miles southeast of
Mountain View, or 28 miles northwest of Manila, moving east at 15
mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

This severe thunderstorm will remain over mainly rural areas of east
central Uinta County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4114 11030 4126 11029 4133 11009 4125 11005
      4111 11005
TIME...MOT...LOC 1934Z 258DEG 12KT 4118 11021 

HAIL...0.75IN
WIND...60MPH
 
$$

Webber

219 
WWUS55 KSLC 151947
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
147 PM MDT Sat May 15 2021

WYC041-151956-
/O.EXP.KSLC.SV.W.0001.000000T0000Z-210515T1945Z/
Uinta WY-
147 PM MDT Sat May 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL UINTA COUNTY HAS
EXPIRED...
                
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 has been allowed to expire.  However small 
hail is still possible with this thunderstorm. A new Significant 
Weather Advisory has been issued through 2:30 PM.

LAT...LON 4114 11030 4126 11029 4133 11009 4125 11005
      4111 11005
TIME...MOT...LOC 1946Z 258DEG 12KT 4119 11017 

$$

Webber

The office that day

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

Issued	Product	Office	Counties	Lasted
May 15, 1:03 PM MDT	Special Weather Statement	SLC	Uinta	42 min
May 15, 1:32 PM MDT	Special Weather Statement	SLC	Uinta	43 min
May 15, 1:44 PM MDT	Special Weather Statement	SLC	Uinta	46 min
May 15, 2:30 PM MDT	Special Weather Statement	SLC	Uinta	45 min

Nearby

Severe Thunderstorm Warnings in Wyoming, 2021 Every severe thunderstorm warning in 2021

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.