Alert archive / Utah / Special Weather Statements in 2024

Special Weather Statement, NWS Salt Lake City, UT

August 4, 2024Emery County, Utah

NWS Salt Lake City, UT issued this special weather statement at Aug 4, 2024, 2:15 PM MDT for Emery County, Utah. It was in force for 30 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: Aug 4, 2024, 2:15 PM MDT (20:15 UTC)
Expired: Aug 4, 2024, 2:45 PM MDT
In force: 30 min
Issued by: NWS Salt Lake City, UT
Hail: 0.50 in
Wind: 50

County Emery County, UT

The radar

The Grand Junction radar (KGJX), 220 km from the middle of the area, began a volume at 20:17 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

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.3 hours before the alert went out and 213 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: 79 J/kg
Mixed-layer CIN: -264 J/kg
Mixed-layer LCL: 2346 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 4:25 AM MDT, 9 hours 50 minutes earlier.

Area forecast discussion, Aug 4, 4:25 AM MDT, 9 hours 50 minutes before

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<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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In the hours before

Special weather statement, Aug 4, 2:15 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
215 PM MDT Sun Aug 4 2024

UTZ120-121-042045-
San Rafael Swell UT-Castle Country UT-
215 PM MDT Sun Aug 4 2024

...A strong thunderstorm will impact portions of central Emery County
through 245 PM MDT
...

At 214 PM MDT, Doppler radar was tracking a strong thunderstorm 16
miles east of Clawson, or 34 miles west of Green River, moving
northeast at 15 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

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

This storm will remain over mainly rural areas of central Emery
County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways. Avoid slot canyons and typically dry washes.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3894 11084 3908 11096 3934 11070 3906 11046
TIME...MOT...LOC 2014Z 236DEG 12KT 3907 11080

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

STW

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 4, 2:39 PM MDT	Areal Flood Advisory	SLC	Emery	3 hr
Aug 4, 4:02 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Carbon	3 hr

Nearby

Special Weather Statements in Utah, 2024 Every special weather statement 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.