Alert archive / Utah / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 3, NWS Salt Lake City, UT

May 16, 2021Morgan County, Weber County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at May 16, 2021, 2:03 PM MDT for Morgan County, Weber County, Utah. 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 16, 2021, 2:03 PM MDT (20:03 UTC)
Expired: May 16, 2021, 2:30 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

Counties Morgan County, UT, Weber County, UT

The radar

The Salt Lake City radar (KMTX), 56 km from the middle of the area, began a volume at 20:01 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, 8.1 hours before the alert went out and 44 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.

270 
WUUS55 KSLC 162003
SVRSLC
UTC029-057-162030-
/O.NEW.KSLC.SV.W.0003.210516T2003Z-210516T2030Z/

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

The National Weather Service in Salt Lake City has issued a

* Severe Thunderstorm Warning for...
  Central Weber County in northern Utah...
  West central Morgan County in northern Utah...

* Until 230 PM MDT

* At 202 PM MDT, a severe thunderstorm was located near Morgan,
  moving northwest at 20 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. 

* Locations impacted include...
  Ogden, South Ogden, Weber State University, Mountain Green,
  Peterson, Snowbasin and Eden.

This includes Interstate 84 between mile markers 91 and 98.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4112 11168 4109 11174 4120 11200 4130 11183
TIME...MOT...LOC 2002Z 136DEG 18KT 4113 11175 

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

Webber

1 follow-up statement

103 
WWUS55 KSLC 162017
SVSSLC

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

UTC029-057-162030-
/O.CON.KSLC.SV.W.0003.000000T0000Z-210516T2030Z/
Weber UT-Morgan UT-
217 PM MDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM MDT
FOR CENTRAL WEBER AND WEST CENTRAL MORGAN COUNTIES...

At 216 PM MDT, a severe thunderstorm was located near Weber State
University, or 8 miles east of Ogden, moving northwest at 20 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. 

Locations impacted include...
Ogden, Weber State University, Mountain Green, Snowbasin and Eden. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4117 11172 4114 11182 4121 11198 4130 11183
TIME...MOT...LOC 2016Z 136DEG 18KT 4118 11182 

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, 1:22 PM MDT	Severe Thunderstorm Warning	SLC	Davis, Salt Lake, Tooele	23 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, 2:07 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.