Alert archive / Utah / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 47, NWS Salt Lake City, UT

August 19, 2022Box Elder County, Cache County, Weber County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 19, 2022, 4:27 PM MDT for Box Elder County, Cache County, Weber County, Utah. It was in force for 33 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: Aug 19, 2022, 4:27 PM MDT (22:27 UTC)
Expired: Aug 19, 2022, 5:00 PM MDT
In force: 33 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Box Elder County, UT, Cache County, UT, Weber County, UT

The radar

The Salt Lake City radar (KMTX), 32 km from the middle of the area, began a volume at 22:30 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, 10.5 hours before the alert went out and 86 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: 254 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 2192 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 42 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 Aug 19, 2:58 PM MDT, 1 hour 29 minutes earlier.

Area forecast discussion, Aug 19, 2:58 PM MDT, 1 hour 29 minutes before

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In the hours before

Local storm report, Aug 19, 3:13 PM MDT, 1 hour 14 minutes before

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Local storm report, Aug 19, 3:15 PM MDT, 1 hour 12 minutes before

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Special weather statement, Aug 19, 3:19 PM MDT, 1 hour 8 minutes before

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Special weather statement, Aug 19, 3:44 PM MDT, 43 minutes before

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Special weather statement, Aug 19, 3:47 PM MDT, 40 minutes before

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Special weather statement, Aug 19, 4:12 PM MDT, 15 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
Aug 19, 8:13 AM MDT	Flood Watch	SLC	Beaver, Garfield, Iron, Kane, Piute, Sevier and 2 more	14 hr
Aug 19, 12:56 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Kane, Washington	4 hr
Aug 19, 1:53 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Washington	3 hr
Aug 19, 2:02 PM MDT	Special Weather Statement	SLC	Piute	13 min
Aug 19, 2:15 PM MDT	Areal Flood Advisory	SLC	Iron, Washington	113 min
Aug 19, 2:15 PM MDT	Special Weather Statement	SLC	Piute	15 min
Aug 19, 2:28 PM MDT	Special Weather Statement	SLC	Piute	17 min
Aug 19, 2:39 PM MDT	Special Weather Statement	SLC	Washington	36 min
Aug 19, 2:45 PM MDT	Special Weather Statement	SLC	Piute	30 min
Aug 19, 3:19 PM MDT	Special Weather Statement	SLC	Morgan	26 min
Aug 19, 3:44 PM MDT	Special Weather Statement	SLC	Morgan	31 min
Aug 19, 3:47 PM MDT	Special Weather Statement	SLC	Iron	28 min
Aug 19, 4:12 PM MDT	Special Weather Statement	SLC	Weber	33 min
Aug 19, 5:15 PM MDT	Special Weather Statement	SLC	Iron	30 min
Aug 19, 5:29 PM MDT	Special Weather Statement	SLC	Washington	31 min
Aug 19, 5:43 PM MDT	Special Weather Statement	SLC	Iron	32 min

Nearby

Severe Thunderstorm Warnings in Utah, 2022 Every severe thunderstorm warning in 2022

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.