Alert archive / Utah / Severe Thunderstorm Warnings in 2026

Severe Thunderstorm Warning 45, NWS Salt Lake City, UT

July 21, 2026Garfield County, Kane County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 21, 2026, 1:29 AM MDT for Garfield County, Kane County, Utah. It was in force for 31 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: Jul 21, 2026, 1:29 AM MDT (07:29 UTC)
Expired: Jul 21, 2026, 2:00 AM MDT
In force: 31 min
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Garfield County, UT, Kane County, UT

The radar

The Cedar City radar (KICX), 105 km from the middle of the area, began a volume at 07:30 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

Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 7.5 hours before the alert went out and 260 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: 89 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 1793 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 Jul 20, 10:27 PM MDT, 3 hours 2 minutes earlier.

Area forecast discussion, Jul 20, 10:27 PM MDT, 3 hours 2 minutes before

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In the hours before

Special weather statement, Jul 20, 11:41 PM MDT, 1 hour 48 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.
      </p>
      <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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Special weather statement, Jul 21, 12:10 AM MDT, 1 hour 19 minutes before

Special Weather Statement
National Weather Service Salt Lake City UT
1210 AM MDT Tue Jul 21 2026

UTZ125-128>131-210700-
Capitol Reef National Park and Vicinity UT-South Central Utah UT-
Western Canyonlands UT-Southern Mountains UT-
Glen Canyon Recreation Area/Lake Powell UT-
1210 AM MDT Tue Jul 21 2026

...Strong thunderstorms will impact portions of eastern Garfield, San
Juan and eastern Kane Counties through 100 AM MDT
...

At 1209 AM MDT, Doppler radar was tracking strong thunderstorms along
a line extending from 12 miles north of Ticaboo to 11 miles southwest
of Halls Crossing to near Rainbow Bridge South Trailhead. Movement
was west at 30 mph.

HAZARD...Wind gusts of 50 to 55 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Halls Crossing, Bullfrog, Glen Canyon National Recreation Area,
Ticaboo, Rainbow Bridge South Trailhead, Labyrinth Canyon, Lake
Powell, and Dangling Rope Marina.

This storm will be capable of producing strong gusty winds on Lake
Powell. This will lead to a sudden increase in waves and very choppy
waters which will result in hazardous boating conditions. Boaters are
urged to seek safe harbor if possible.

This includes Utah Route 276 between mile markers 12 and 34.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3751 11129 3808 11088 3774 11037 3767 11038
      3761 11053 3745 11053 3744 11060 3744 11062
      3730 11069 3725 11059 3729 11049 3709 11056
      3708 11057 3716 11057 3719 11060 3716 11066
      3708 11068 3700 11091 3700 11132
TIME...MOT...LOC 0609Z 109DEG 27KT 3779 11068 3737 11085 3704 11091

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

JAC

Local storm report, Jul 21, 12:39 AM MDT, 50 minutes before

Preliminary Local Storm Report
National Weather Service Salt Lake City UT
1239 AM MDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1220 AM     Tstm Wnd Gst     11 N Ticaboo            37.75N 110.65W
07/21/2026  M62 MPH          Garfield           UT   Mesonet

            Mesonet station UTELL Sr-276 At Mp 21.5 Mt.
            Ellsworth.

&&

Local storm report, Jul 21, 1:06 AM MDT, 23 minutes before

Preliminary Local Storm Report
National Weather Service Salt Lake City UT
106 AM MDT Tue Jul 21 2026

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1220 AM     Tstm Wnd Gst     1 NNW Bullfrog          37.52N 110.73W
07/21/2026  M70 MPH          Kane               UT   Mesonet

            HADS site Bullfrog Basin Marina.

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 11:41 PM MDT	Special Weather Statement	SLC	Emery	34 min
Jul 21, 12:10 AM MDT	Special Weather Statement	SLC		50 min
Jul 21, 12:37 AM MDT	Severe Thunderstorm Warning	SLC	Garfield, Kane, San Juan	23 min
Jul 21, 12:44 AM MDT	Severe Thunderstorm Warning	SLC	Kane, San Juan	16 min
Jul 21, 12:59 AM MDT	Severe Thunderstorm Warning	SLC	Garfield, Kane, San Juan	31 min
Jul 21, 1:59 AM MDT	Special Weather Statement	SLC	Piute	46 min
Jul 21, 2:00 AM MDT	Special Weather Statement	SLC	Kane	45 min
Jul 21, 3:17 AM MDT	Special Weather Statement	SLC	Sevier	28 min
Jul 21, 5:56 AM MDT	Flash Flood Warning Considerable damage threat	SLC	Beaver, Piute	3 hr
Jul 21, 3:15 PM MDT	Special Weather Statement	SLC	Sevier	45 min
Jul 21, 3:25 PM MDT	Areal Flood Advisory	SLC	Sevier	64 min
Jul 21, 3:50 PM MDT	Special Weather Statement	SLC	Millard	25 min
Jul 21, 4:00 PM MDT	Special Weather Statement	SLC	Carbon	30 min
Jul 21, 4:22 PM MDT	Special Weather Statement	SLC	Morgan	38 min
Jul 21, 4:26 PM MDT	Special Weather Statement	SLC	Millard	49 min
Jul 21, 4:29 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Sevier	91 min
Jul 21, 4:30 PM MDT	Special Weather Statement	SLC	Wasatch	45 min
Jul 21, 4:45 PM MDT	Areal Flood Advisory	SLC	Summit	60 min
Jul 21, 5:22 PM MDT	Special Weather Statement	SLC	Summit	53 min
Jul 21, 5:25 PM MDT	Special Weather Statement	SLC	Juab	50 min
Jul 21, 5:49 PM MDT	Special Weather Statement	SLC	Morgan	26 min
Jul 21, 5:56 PM MDT	Special Weather Statement	SLC	Uinta	34 min

Nearby

Severe Thunderstorm Warnings in Utah, 2026 Every severe thunderstorm warning in 2026

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.