Alert archive / Utah / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 25, NWS Salt Lake City, UT

June 6, 20234 counties in Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jun 6, 2023, 3:58 PM MDT for 4 counties in Utah. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 6, 2023, 3:58 PM MDT (21:58 UTC)
Expired: Jun 6, 2023, 4:45 PM MDT
In force: 47 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Box Elder County, UT, Davis County, UT, Tooele County, UT, Weber County, UT

The radar

The Salt Lake City radar (KMTX), 25 km from the middle of the area, began a volume at 22:02 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

Elko, NV (KLKN), launched 12:00Z, 10.0 hours before the alert went out and 139 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: 1708 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 2:30 PM MDT, 1 hour 28 minutes earlier.

Area forecast discussion, Jun 6, 2:30 PM MDT, 1 hour 28 minutes before

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In the hours before

Special weather statement, Jun 6, 2:06 PM MDT, 1 hour 52 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
206 PM MDT Tue Jun 6 2023

UTZ110-112-WYZ021-062030-
Western Uinta Mountains UT-Wasatch Mountains I-80 North UT-
Southwest Wyoming WY-
206 PM MDT Tue Jun 6 2023

...A strong thunderstorm will impact portions of southeastern Rich...
northeastern Morgan...north central Summit and southwestern Uinta
Counties through 230 PM MDT...

At 206 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles south of Evanston, moving north at 15 mph.

HAZARD...Wind gusts up to 50 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Evanston, Wahsatch and Castle Rock.

This includes Interstate 80 in Utah between mile markers 183 and 196.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4100 11098 4100 11116 4123 11126 4128 11107
      4124 11088
TIME...MOT...LOC 2006Z 178DEG 13KT 4103 11106

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

STW

Special weather statement, Jun 6, 2:18 PM MDT, 1 hour 40 minutes before

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Local storm report, Jun 6, 2:56 PM MDT, 1 hour 2 minutes before

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Special weather statement, Jun 6, 3:04 PM MDT, 54 minutes before

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Local storm report, Jun 6, 3:31 PM MDT, 27 minutes before

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Special weather statement, Jun 6, 3:46 PM MDT, 12 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 1:45 PM MDT	Special Weather Statement	SLC	Juab	30 min
Jun 6, 2:06 PM MDT	Special Weather Statement	SLC	Summit	24 min
Jun 6, 2:18 PM MDT	Special Weather Statement	SLC	Tooele	27 min
Jun 6, 2:27 PM MDT	Severe Thunderstorm Warning	SLC	Tooele	48 min
Jun 6, 2:45 PM MDT	Severe Thunderstorm Warning	SLC	Tooele	45 min
Jun 6, 3:04 PM MDT	Special Weather Statement	SLC	Kane	41 min
Jun 6, 3:14 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Tooele	46 min
Jun 6, 3:24 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder, Tooele	36 min
Jun 6, 3:46 PM MDT	Special Weather Statement	SLC	Carbon	44 min
Jun 6, 4:02 PM MDT	Special Weather Statement	SLC	Davis	28 min
Jun 6, 4:07 PM MDT	Special Weather Statement	SLC	Rich	23 min
Jun 6, 4:39 PM MDT	Special Weather Statement	SLC	Box Elder	36 min
Jun 6, 4:44 PM MDT	Special Weather Statement	SLC	Davis	31 min
Jun 6, 5:29 PM MDT	Special Weather Statement	SLC	Cache	31 min
Jun 6, 5:49 PM MDT	Special Weather Statement	SLC	Emery	41 min
Jun 6, 5:58 PM MDT	Special Weather Statement	SLC	Cache	32 min

Nearby

Severe Thunderstorm Warnings in Utah, 2023 Every severe thunderstorm warning in 2023

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.