Alert archive / Utah / Special Weather Statements in 2021

Special Weather Statement, NWS Salt Lake City, UT

August 26, 2021Duchesne County, Utah

NWS Salt Lake City, UT issued this special weather statement at Aug 26, 2021, 1:23 PM MDT for Duchesne County, Utah. It was in force for 37 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 26, 2021, 1:23 PM MDT (19:23 UTC)
Expired: Aug 26, 2021, 2:00 PM MDT
In force: 37 min
Issued by: NWS Salt Lake City, UT
Hail: 0.25 in
Wind: 55

County Duchesne County, UT

The radar

The Salt Lake City radar (KMTX), 206 km from the middle of the area, began a volume at 19:24 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, 7.4 hours before the alert went out and 142 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2935 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 81 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 26, 10:22 AM MDT, 3 hours 1 minute earlier.

Area forecast discussion, Aug 26, 10:22 AM MDT, 3 hours 1 minute 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, Aug 26, 4:55 AM MDT, 8 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
455 AM MDT Thu Aug 26 2021

UTZ101>131-WYZ021-271100-
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-
455 AM MDT Thu Aug 26 2021

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Today and Tonight

Showers and thunderstorms, some strong, may bring gusty and
erratic winds to portions of Utah this afternoon and early
evening. The highest potential for showers and thunderstorms is
expected to be across portions of eastern Utah.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Early indications suggest monsoonal moisture may begin to slowly
return to southern Utah by late weekend and possibly continue
northward into early next week, bringing a potential increase in
showers and thunderstorms.

.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, Aug 26, 1:23 PM MDT, 0 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
123 PM MDT Thu Aug 26 2021

UTZ112-114-262000-
Western Uinta Basin UT-Western Uinta Mountains UT-
123 PM MDT Thu Aug 26 2021

...A strong thunderstorm will impact portions of northeastern
Duchesne County through 200 PM MDT...

At 122 PM MDT, Doppler radar was tracking a strong thunderstorm 17
miles west of Whiterocks, moving northeast at 30 mph. Additional
strong thunderstorms are located near Duchesne.

HAZARD...Wind gusts of 50 to 55 mph and pea size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Roosevelt, Duchesne, Myton, Starvation Reservoir, Altamont, Talmage,
Cedarview, Utahn, Bridgeland, Upalco, Mountain Home, Arcadia, Neola
and Altonah.

This includes the following highways...
 US Route 40 between mile markers 76 and 115.
 Utah Route 35 between mile markers 54 and 62.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4015 11062 4056 11036 4078 10998 4014 10998
TIME...MOT...LOC 1922Z 242DEG 26KT 4052 11027

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

CRK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 6:02 PM MDT	Special Weather Statement	SLC	Utah	28 min
Aug 25, 6:30 PM MDT	Special Weather Statement	SLC	Salt Lake	30 min
Aug 25, 6:48 PM MDT	Special Weather Statement	SLC	Wasatch	27 min
Aug 25, 7:24 PM MDT	Special Weather Statement	SLC	Utah	36 min
Aug 25, 10:10 PM MDT	Special Weather Statement	SLC	Salt Lake	35 min
Aug 26, 2:27 PM MDT	Special Weather Statement	SLC	Wayne	33 min
Aug 26, 2:50 PM MDT	Severe Thunderstorm Warning	SLC	Emery, Wayne	25 min
Aug 26, 3:00 PM MDT	Special Weather Statement	SLC	Emery	45 min
Aug 26, 3:09 PM MDT	Severe Thunderstorm Warning	SLC	Emery	36 min
Aug 26, 3:13 PM MDT	Severe Thunderstorm Warning	SLC	Emery, Wayne	32 min
Aug 26, 3:28 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Emery, Wayne	3 hr
Aug 26, 3:44 PM MDT	Special Weather Statement	SLC	Emery	31 min
Aug 26, 3:49 PM MDT	Special Weather Statement	SLC		26 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.