Alert archive / Utah / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 19, NWS Grand Junction, CO

August 22, 2018Uintah County, Utah

NWS Grand Junction, CO issued this severe thunderstorm warning at Aug 22, 2018, 5:54 PM MDT for Uintah County, Utah. It was in force for 51 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
Aug 22, 2018, 5:54 PM MDT (23:54 UTC)
Expired
Aug 22, 2018, 6:45 PM MDT
In force
51 min
Issued by
NWS Grand Junction, CO
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Uintah County, UT

The radar

The Grand Junction radar (KGJX), 163 km from the middle of the area, began a volume at 23:55 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.

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 Grand Junction, CO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 22, 4:30 PM MDT, 1 hour 24 minutes earlier.

Area forecast discussion, Aug 22, 4:30 PM MDT, 1 hour 24 minutes before
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Hazardous weather outlook, Aug 22, 7:15 AM MDT, 10 hours 39 minutes before
Hazardous Weather Outlook
National Weather Service Grand Junction CO
715 AM MDT Wed Aug 22 2018

COZ001>014-017>023-UTZ022>025-027>029-231315-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-
Upper Gunnison River Valley-Uncompahgre Plateau and Dallas Divide-
Northwest San Juan Mountains-Southwest San Juan Mountains-
Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
715 AM MDT Wed Aug 22 2018

This hazardous weather outlook is for eastern Utah and western
Colorado.

.DAY ONE...Today and Tonight

Another round of showers and thunderstorms is on tap today with
some heavier rainfall expected across the entire forecast area. A
flash flood watch remains in effect for the burn scars across the
area as even low amounts of rainfall can create flash flooding,
mud slides, and debris flows. Strong storms are possible over
northeast Utah and extreme northwest Colorado this afternoon and
evening. There is a slight chance for hail up to 1 inch diameter
and outflow winds to 60 MPH from one or two storm cells.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

An upper level trough will allow some showers and storms on
Thursday though coverage should lower in the evening hours as it
moves eastwards. Friday and Saturday looks relatively dry before
another shot of monsoonal moisture moves in causing an increase
in
afternoon and evening convection.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected today or tonight, however
spotters are encouraged to relay rainfall amounts or any observed
flooding to the National Weather Service in Grand Junction.

In the hours before

Local storm report, Aug 22, 5:20 PM MDT, 34 minutes before
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Local storm report, Aug 22, 5:21 PM MDT, 33 minutes before
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Local storm report, Aug 22, 5:25 PM MDT, 29 minutes before
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Local storm report, Aug 22, 5:26 PM MDT, 28 minutes before
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Local storm report, Aug 22, 5:29 PM MDT, 25 minutes before
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Local storm report, Aug 22, 5:48 PM MDT, 6 minutes before
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      </p>
      <p id="message2">
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The office that day

Everything else NWS Grand Junction, CO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 21, 6:49 PM MDTFlash Flood WarningGJTEagle3 hr
Aug 22, 1:16 PM MDTSpecial Weather StatementGJTMesa44 min
Aug 22, 2:05 PM MDTFlash Flood WarningGJTLa Plata3 hr
Aug 22, 3:16 PM MDTFlash Flood WarningGJTMesa69 min
Aug 22, 4:19 PM MDTSevere Thunderstorm WarningGJTUintah56 min
Aug 22, 5:17 PM MDTSevere Thunderstorm WarningGJTDaggett, Uintah28 min
Aug 22, 5:42 PM MDTAreal Flood AdvisoryGJTUintah3 hr

Nearby

Severe Thunderstorm Warnings in Utah, 2018Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.