Alert archive / Utah / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 69, NWS Salt Lake City, UT

August 6, 2010Rich County, Utah; Uinta County, Wyoming

NWS Salt Lake City, UT issued this severe thunderstorm warning at Aug 6, 2010, 7:14 PM MDT for Rich County, Utah; Uinta County, Wyoming. It was in force for 22 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 6, 2010, 7:14 PM MDT (01:14 UTC)
Expired: Aug 6, 2010, 7:36 PM MDT
In force: 22 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon

Counties Rich County, UT, Uinta County, WY

The radar

The Salt Lake City radar (KMTX), 131 km from the middle of the area, began a volume at 01:17 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 00:00Z, 1.2 hours before the alert went out and 284 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: 75 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 4443 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 13 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.

In the hours before

Special weather statement, Aug 6, 6:18 PM MDT, 56 minutes before

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Special weather statement, Aug 6, 6:41 PM MDT, 33 minutes before

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Local storm report, Aug 6, 6:59 PM MDT, 15 minutes before

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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <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.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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 6, 6:18 PM MDT	Special Weather Statement	SLC	Cache	27 min
Aug 6, 6:41 PM MDT	Special Weather Statement	SLC	Rich	34 min
Aug 6, 7:33 PM MDT	Special Weather Statement	SLC	Rich	42 min
Aug 7, 4:26 AM MDT	Flash Flood Watch	SLC		15 hr
Aug 7, 3:53 PM MDT	Special Weather Statement	SLC	Davis, Salt Lake	37 min
Aug 7, 4:30 PM MDT	Special Weather Statement	SLC	Morgan, Salt Lake, Weber	60 min

Nearby

Severe Thunderstorm Warnings in Utah, 2010 Severe Thunderstorm Warnings in Wyoming, 2010 Every severe thunderstorm warning in 2010

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.