Alert archive / Utah / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 54, NWS Salt Lake City, UT

August 12, 2024Tooele County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 12, 2024, 2:02 PM MDT for Tooele County, Utah. It was in force for 28 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 12, 2024, 2:02 PM MDT (20:02 UTC)
Expired: Aug 12, 2024, 2:30 PM MDT
In force: 28 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Tooele County, UT

The radar

The Salt Lake City radar (KMTX), 107 km from the middle of the area, began a volume at 20:05 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, 8.0 hours before the alert went out and 110 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: 45 J/kg
Mixed-layer CIN: -229 J/kg
Mixed-layer LCL: 1694 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 154 m²/s²
0-3 km storm-relative helicity: 310 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 12, 3:23 AM MDT, 10 hours 39 minutes earlier.

Area forecast discussion, Aug 12, 3:23 AM MDT, 10 hours 39 minutes before

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In the hours before

Special weather statement, Aug 12, 1:17 PM MDT, 45 minutes before

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Special weather statement, Aug 12, 1:26 PM MDT, 36 minutes before

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Special weather statement, Aug 12, 1:34 PM MDT, 28 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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      <p id="message2">
        Please try again in a few minutes.
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Special weather statement, Aug 12, 1:46 PM MDT, 16 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
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Local storm report, Aug 12, 1:51 PM MDT, 11 minutes before

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      <p id="message2">
        Please try again in a few minutes.
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Local storm report, Aug 12, 1:59 PM MDT, 3 minutes before

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<body>
  <main class="wrap">
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
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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 11, 6:42 PM MDT	Special Weather Statement	SLC	Millard	48 min
Aug 11, 7:25 PM MDT	Severe Thunderstorm Warning	SLC	Beaver, Millard, Piute, Sevier	50 min
Aug 11, 7:41 PM MDT	Special Weather Statement	SLC	Carbon	49 min
Aug 11, 8:44 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Piute	6 hr
Aug 11, 9:04 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Millard, Sevier	3 hr
Aug 12, 11:26 AM MDT	Special Weather Statement	SLC		19 min
Aug 12, 12:42 PM MDT	Special Weather Statement	SLC	Juab	33 min
Aug 12, 1:06 PM MDT	Special Weather Statement	SLC	Tooele	39 min
Aug 12, 1:17 PM MDT	Special Weather Statement	SLC	Sanpete	28 min
Aug 12, 1:26 PM MDT	Special Weather Statement	SLC	Salt Lake	34 min
Aug 12, 1:34 PM MDT	Special Weather Statement	SLC	Tooele	26 min
Aug 12, 1:46 PM MDT	Special Weather Statement	SLC	Tooele	44 min
Aug 12, 2:20 PM MDT	Special Weather Statement	SLC		25 min
Aug 12, 2:27 PM MDT	Special Weather Statement	SLC	Salt Lake	33 min
Aug 12, 2:30 PM MDT	Severe Thunderstorm Warning	SLC	Tooele	17 min
Aug 12, 2:40 PM MDT	Special Weather Statement	SLC	Davis	35 min
Aug 12, 2:46 PM MDT	Special Weather Statement	SLC	Salt Lake	29 min
Aug 12, 2:47 PM MDT	Areal Flood Advisory	SLC	Utah	118 min
Aug 12, 2:57 PM MDT	Areal Flood Advisory	SLC	Utah	63 min
Aug 12, 3:05 PM MDT	Special Weather Statement	SLC	Utah	40 min
Aug 12, 3:13 PM MDT	Special Weather Statement	SLC	Salt Lake	47 min
Aug 12, 3:16 PM MDT	Areal Flood Advisory	SLC	Salt Lake	59 min
Aug 12, 3:17 PM MDT	Special Weather Statement	SLC	Wasatch	28 min
Aug 12, 3:22 PM MDT	Areal Flood Advisory	SLC	Wasatch	53 min
Aug 12, 3:34 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Utah	116 min
Aug 12, 3:34 PM MDT	Special Weather Statement	SLC	Tooele	26 min
Aug 12, 4:00 PM MDT	Special Weather Statement	SLC	Tooele	30 min
Aug 12, 5:04 PM MDT	Special Weather Statement	SLC	Kane	26 min
Aug 12, 5:18 PM MDT	Special Weather Statement	SLC		27 min

Nearby

Severe Thunderstorm Warnings in Utah, 2024 Every severe thunderstorm warning in 2024

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.