Alert archive / Colorado / Flash Flood Watches in 2022
Flash Flood Watch 21, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood watch at Aug 2, 2022, 9:58 PM MDT for 6 counties in Colorado. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 2, 2022, 9:58 PM MDT (03:58 UTC)
- Expired
- Aug 3, 2022, 12:00 AM MDT
- In force
- 2 hr
- Issued by
- NWS Grand Junction, CO
- Flood severity
- None
Counties Eagle County, CO, Garfield County, CO, Moffat County, CO, Pitkin County, CO, Rio Blanco County, CO, Routt County, CO
The radar
The Grand Junction radar (KGJX), 114 km from the middle of the area, began a volume at 03:59 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 00:00Z, 4.0 hours before the alert went out and 386 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.
- Mixed-layer CAPE
- 369 J/kg
- Mixed-layer CIN
- -76 J/kg
- Mixed-layer LCL
- 1850 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at Aug 2, 5:55 PM MDT, 4 hours 3 minutes earlier.
Area forecast discussion, Aug 2, 5:55 PM MDT, 4 hours 3 minutes before
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</html>Hazardous weather outlook, Aug 2, 4:15 AM MDT, 17 hours 43 minutes before
Hazardous Weather Outlook National Weather Service Grand Junction CO 415 AM MDT Tue Aug 2 2022 COZ001>014-017>023-UTZ022>025-027>029-031015- 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- 415 AM MDT Tue Aug 2 2022 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Drier air working in from the south will nudge the deepest moisture north of I-70 today. This is where showers and thunderstorms will become most widespread this afternoon. Risks of heavy rain, frequent lightning, gusty winds and small hail are all possible. Most showers and storms will diminish after sunset with perhaps a shower or two lingering into the overnight hours. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Showers and storms will decrease in coverage on Wednesday as the main monsoon plume becomes cut off. However, residual moisture will continue to circulate through the region, so isolated mountain showers and storms will remain possible. Monsoon moisture returns in earnest late this week into the weekend with an increasing threat of widespread showers and storms producing heavy rainfall. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.
In the hours before
Special weather statement, Aug 2, 5:58 PM MDT, 4 hours before
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</html>Local storm report, Aug 2, 6:39 PM MDT, 3 hours 19 minutes before
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</html>Special weather statement, Aug 2, 9:11 PM MDT, 47 minutes before
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</html>The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 6:57 PM MDT | Areal Flood Advisory | GJT | Rio Blanco | 3 hr |
| Aug 2, 7:01 PM MDT | Special Weather Statement | GJT | Routt | 29 min |
| Aug 2, 7:22 PM MDT | Flash Flood Warning | GJT | Moffat, Routt | 95 min |
| Aug 2, 8:04 PM MDT | Special Weather Statement | GJT | Routt | 26 min |
| Aug 2, 9:11 PM MDT | Special Weather Statement | GJT | Rio Blanco | 49 min |
| Aug 2, 9:48 PM MDT | Special Weather Statement | GJT | Garfield | 27 min |
| Aug 2, 10:25 PM MDT | Special Weather Statement | GJT | Routt | 50 min |
| Aug 3, 1:02 PM MDT | Special Weather Statement | GJT | Delta | 28 min |
| Aug 3, 2:35 PM MDT | Special Weather Statement | GJT | Montrose | 25 min |
| Aug 3, 4:08 PM MDT | Special Weather Statement | GJT | Hinsdale | 37 min |
| Aug 3, 4:37 PM MDT | Areal Flood Advisory | GJT | Hinsdale | 3 hr |
Nearby
Flash Flood Watches in Colorado, 2022Every flash flood watch in 2022
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.