Alert archive / Utah / Special Weather Statements in 2021

Special Weather Statement, NWS Salt Lake City, UT

July 13, 2021Carbon County, Utah

NWS Salt Lake City, UT issued this special weather statement at Jul 13, 2021, 3:28 PM MDT for Carbon County, Utah. It was in force for 32 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: Jul 13, 2021, 3:28 PM MDT (21:28 UTC)
Expired: Jul 13, 2021, 4:00 PM MDT
In force: 32 min
Issued by: NWS Salt Lake City, UT

County Carbon County, UT

The radar

The Grand Junction radar (KGJX), 163 km from the middle of the area, began a volume at 21:32 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

Grand Junction, CO (KGJT), launched 12:00Z, 9.5 hours before the alert went out and 137 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: 27 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 3436 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 184 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 Jul 13, 11:42 AM MDT, 3 hours 46 minutes earlier.

Area forecast discussion, Jul 13, 11:42 AM MDT, 3 hours 46 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Hazardous weather outlook, Jul 13, 5:06 AM MDT, 10 hours 22 minutes before

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
506 AM MDT Tue Jul 13 2021

UTZ101>131-WYZ021-141115-
Great Salt Lake Desert and Mountains-Tooele and Rush Valleys-
Eastern Box Elder County-Northern Wasatch Front-Salt Lake Valley-
Utah Valley-Cache Valley/Utah Portion-Wasatch Back-
Bear Lake and Bear River Valley-Wasatch Mountains I-80 North-
Wasatch Mountains South of I-80-Western Uinta Mountains-
Wasatch Plateau/Book Cliffs-Western Uinta Basin-
Western Millard and Juab Counties-Eastern Juab/Millard Counties-
Central Mountains-Sanpete Valley-Sevier Valley-Castle Country-
San Rafael Swell-Southwest Utah-Lower Washington County-
Zion National Park-Southern Mountains-Upper Sevier River Valleys-
Bryce Canyon Country-South Central Utah-
Capitol Reef National Park and Vicinity-Western Canyonlands-
Glen Canyon Recreation Area/Lake Powell-Southwest Wyoming-
506 AM MDT Tue Jul 13 2021

This Hazardous Weather Outlook is for portions of central Utah...
northern Utah...southern Utah...southwest Utah and southwest
Wyoming.

.DAY ONE...Today and Tonight

Monsoonal moisture will continue spreading into the area today.
This will aid in shower and thunderstorm development across the
outlook area, with southern Utah expected to see the highest
chances for precipitation. Some showers and storms could produce
locally heavy rainfall which will increase the threat for flash
flooding, especially across southern Utah.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Additional showers and thunderstorms are likely Wednesday and
Wednesday evening. Some could produce locally heavy rainfall
across southern Utah with an increasing threat for flash flooding
once again.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed. Please relay any information
about observed severe weather to the NWS while following all
local, state, and CDC guidelines.

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx

In the hours before

Special weather statement, Jul 13, 3:28 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
328 PM MDT Tue Jul 13 2021

UTZ113-132200-
Wasatch Plateau/Book Cliffs UT-
328 PM MDT Tue Jul 13 2021

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL EMERY COUNTY UNTIL
400 PM MDT...

At 328 PM MDT, National Weather Service Doppler radar indicated a
strong thunderstorm 22 miles southeast of Sunnyside, or 25 miles
north of Green River...moving east at 15 mph.

Penny size hail and wind gusts up to 50 mph will be possible.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If threatening weather approaches, take shelter in a sturdy building.

&&

LAT...LON 3936 11002 3930 11006 3928 11008 3926 11006
      3924 11012 3940 11020 3948 11002 3941 11001
TIME...MOT...LOC 2128Z 248DEG 14KT 3935 11007

Webber

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 2:14 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Jul 13, 3:03 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Jul 13, 4:50 PM MDT	Special Weather Statement	SLC	Beaver	40 min
Jul 13, 5:17 PM MDT	Special Weather Statement	SLC	Beaver, Millard	43 min

Nearby

Special Weather Statements in Utah, 2021 Every special weather statement in 2021

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.