Alert archive / Utah / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 2, NWS Salt Lake City, UT

May 16, 2021Davis County, Salt Lake County, Tooele County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 16, 2021, 1:22 PM MDT for Davis County, Salt Lake County, Tooele County, Utah. It was in force for 23 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 16, 2021, 1:22 PM MDT (19:22 UTC)
Expired: May 16, 2021, 1:45 PM MDT
In force: 23 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The Salt Lake City radar (KMTX), 71 km from the middle of the area, began a volume at 19:23 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, 7.4 hours before the alert went out and 24 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: 528 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 1618 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

565 
WUUS55 KSLC 161922
SVRSLC
UTC011-035-045-161945-
/O.NEW.KSLC.SV.W.0002.210516T1922Z-210516T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Salt Lake City UT
122 PM MDT Sun May 16 2021

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  Northwestern Salt Lake County in northern Utah...
  South central Davis County in northern Utah...
  East central Tooele County in northern Utah...

* Until 145 PM MDT

* At 122 PM MDT, a severe thunderstorm was located near Bingham
  Canyon Mine, or 7 miles southwest of West Valley City, moving
  northwest at 35 mph.

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

  SOURCE...Public reported hail up to quarter sized. 

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

* Locations impacted include...
  West Valley City, West Jordan, Magna, Bingham Canyon Mine, Oquirrh,
  Copperton and Lake Point.

This includes Interstate 80 in Utah between mile markers 98 and 109.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4058 11203 4055 11215 4078 11238 4085 11213
TIME...MOT...LOC 1922Z 151DEG 30KT 4062 11212 

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

Webber

1 follow-up statement

636 
WWUS55 KSLC 161934
SVSSLC

Severe Weather Statement
National Weather Service Salt Lake City UT
134 PM MDT Sun May 16 2021

UTC011-035-045-161945-
/O.CON.KSLC.SV.W.0002.000000T0000Z-210516T1945Z/
Salt Lake UT-Davis UT-Tooele UT-
134 PM MDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM MDT
FOR WEST CENTRAL SALT LAKE...SOUTH CENTRAL DAVIS AND EAST CENTRAL
TOOELE COUNTIES...

At 134 PM MDT, a severe thunderstorm was located near Magna, or 9
miles west of West Valley City, moving northwest at 35 mph.

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

SOURCE...Public. 

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

Locations impacted include...
Lake Point.

This includes Interstate 80 in Utah between mile markers 98 and 105.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4066 11210 4062 11222 4078 11238 4083 11221
TIME...MOT...LOC 1934Z 151DEG 30KT 4071 11219 

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

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, 6:30 PM MDT	Special Weather Statement	SLC		45 min
May 16, 1:07 PM MDT	Special Weather Statement	SLC	Salt Lake	38 min
May 16, 1:52 PM MDT	Special Weather Statement	SLC	Davis	38 min
May 16, 1:55 PM MDT	Special Weather Statement	SLC	Salt Lake	35 min
May 16, 1:58 PM MDT	Special Weather Statement	SLC	Weber	47 min
May 16, 2:03 PM MDT	Severe Thunderstorm Warning	SLC	Morgan, Weber	27 min
May 16, 2:07 PM MDT	Special Weather Statement	SLC		38 min
May 16, 2:20 PM MDT	Special Weather Statement	SLC	Salt Lake	40 min
May 16, 2:29 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Weber	31 min
May 16, 2:31 PM MDT	Special Weather Statement	SLC	Davis	44 min
May 16, 2:50 PM MDT	Special Weather Statement	SLC		55 min
May 16, 3:00 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Weber	30 min
May 16, 3:04 PM MDT	Special Weather Statement	SLC	Tooele	41 min
May 16, 3:24 PM MDT	Severe Thunderstorm Warning	SLC	Tooele	51 min
May 16, 3:30 PM MDT	Special Weather Statement	SLC	Cache	45 min
May 16, 3:32 PM MDT	Special Weather Statement	SLC	Weber	43 min
May 16, 4:15 PM MDT	Special Weather Statement	SLC	Box Elder	45 min
May 16, 4:19 PM MDT	Special Weather Statement	SLC	Box Elder	41 min
May 16, 4:39 PM MDT	Special Weather Statement	SLC	Box Elder	51 min
May 16, 5:07 PM MDT	Special Weather Statement	SLC	Box Elder	53 min

Nearby

Severe Thunderstorm Warnings in Utah, 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.