Alert archive / Utah / Special Weather Statements in 2021

Special Weather Statement, NWS Salt Lake City, UT

July 24, 2021Garfield County, Utah

NWS Salt Lake City, UT issued this special weather statement at Jul 24, 2021, 7:17 PM MDT for Garfield County, Utah. It was in force for 28 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 24, 2021, 7:17 PM MDT (01:17 UTC)
Expired: Jul 24, 2021, 7:45 PM MDT
In force: 28 min
Issued by: NWS Salt Lake City, UT

County Garfield County, UT

The radar

The Cedar City radar (KICX), 180 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

Grand Junction, CO (KGJT), launched 00:00Z, 1.3 hours before the alert went out and 255 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: 50 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 2806 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 38 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 24, 4:03 PM MDT, 3 hours 14 minutes earlier.

Area forecast discussion, Jul 24, 4:03 PM MDT, 3 hours 14 minutes before

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Hazardous weather outlook, Jul 24, 6:07 AM MDT, 13 hours 10 minutes before

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
607 AM MDT Sat Jul 24 2021

UTZ101>131-WYZ021-251300-
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-
607 AM MDT Sat Jul 24 2021

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

.DAY ONE...Today and Tonight

Showers and thunderstorms capable of producing heavy rain, gusty
winds, and small hail will once again occur this afternoon and
evening. The strongest storms are expected across southwest Utah
where a potential for flash flooding exists, especially in prone
areas such as slot canyons, burn scars, areas of steep terrain,
and normally dry washes and streams.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Daily showers and thunderstorms capable of heavy rain, gusty
winds and small hail will occur each afternoon and evening over
mainly southern Utah on Sunday before spreading north into central
Utah on Monday and northern Utah by Tuesday.

.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

Local storm report, Jul 24, 5:29 PM MDT, 1 hour 48 minutes before

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Local storm report, Jul 24, 5:43 PM MDT, 1 hour 34 minutes before

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Local storm report, Jul 24, 5:48 PM MDT, 1 hour 29 minutes before

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Special weather statement, Jul 24, 7:17 PM MDT, 0 minutes before

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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
Jul 24, 8:08 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Garfield, Kane	3 hr
Jul 25, 2:25 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Iron	3 hr
Jul 25, 2:49 PM MDT	Special Weather Statement	SLC	Piute	26 min
Jul 25, 2:53 PM MDT	Special Weather Statement	SLC	Beaver	37 min
Jul 25, 3:11 PM MDT	Special Weather Statement	SLC	Piute	34 min
Jul 25, 3:18 PM MDT	Special Weather Statement	SLC	Sevier	27 min
Jul 25, 3:33 PM MDT	Special Weather Statement	SLC	Iron	27 min
Jul 25, 3:49 PM MDT	Severe Thunderstorm Warning	SLC	Iron	26 min
Jul 25, 4:11 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Iron	3 hr
Jul 25, 4:21 PM MDT	Special Weather Statement	SLC	Washington	24 min
Jul 25, 4:29 PM MDT	Areal Flood Advisory	SLC	Iron	3 hr
Jul 25, 4:41 PM MDT	Special Weather Statement	SLC	Washington	19 min
Jul 25, 4:41 PM MDT	Special Weather Statement	SLC	Iron	49 min
Jul 25, 4:52 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Iron, Kane, Washington	4 hr
Jul 25, 5:16 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Washington	3 hr
Jul 25, 5:26 PM MDT	Severe Thunderstorm Warning	SLC	Washington	19 min
Jul 25, 5:42 PM MDT	Severe Thunderstorm Warning	SLC	Washington	33 min
Jul 25, 5:44 PM MDT	Special Weather Statement	SLC	Washington	31 min
Jul 25, 5:52 PM MDT	Special Weather Statement	SLC	Washington	23 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.