Alert archive / Colorado / Flash Flood Warnings in 2020

Flash Flood Warning 3, NWS Grand Junction, CO

August 26, 2020Garfield County, Colorado

NWS Grand Junction, CO issued this flash flood warning at Aug 26, 2020, 3:36 PM MDT for Garfield County, Colorado. It was in force for 117 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 26, 2020, 3:36 PM MDT (21:36 UTC)
Expired: Aug 26, 2020, 5:33 PM MDT
In force: 117 min
Issued by: NWS Grand Junction, CO
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Garfield County, CO

The radar

The Grand Junction radar (KGJX), 65 km from the middle of the area, began a volume at 21:38 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 flash flood 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 flash flood warning went out at Aug 26, 11:57 AM MDT, 3 hours 39 minutes earlier.

Area forecast discussion, Aug 26, 11:57 AM MDT, 3 hours 39 minutes before

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Hazardous weather outlook, Aug 26, 3:19 AM MDT, 12 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Grand Junction CO
319 AM MDT Wed Aug 26 2020

COZ001>014-017>023-UTZ022>025-027>029-270930-
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-
319 AM MDT Wed Aug 26 2020

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

.DAY ONE...Today and Tonight

Isolated afternoon showers and thunderstorms will be possible in
the higher terrain. A few of these thunderstorms may produce brief
pea-sized hail and outflow winds over 40 mph.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Drier weather moves in for Friday and Saturday before another
push of moisture for Saturday and Sunday. A cold front may work
through the western slope by early next week brining cooler
weather for a few days.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 26, 1:45 PM MDT	Flash Flood Watch	GJT	Eagle, Garfield, Pitkin	4 hr

Nearby

Flash Flood Warnings in Colorado, 2020 Every flash flood warning in 2020

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.