Alert archive / Colorado / Flash Flood Warnings in 2024

Flash Flood Warning 4, NWS Grand Junction, CO

June 22, 2024Montrose County, Colorado

NWS Grand Junction, CO issued this flash flood warning at Jun 22, 2024, 4:56 PM MDT for Montrose County, Colorado. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 22, 2024, 4:56 PM MDT (22:56 UTC)
Expired
Jun 22, 2024, 7:00 PM MDT
In force
2 hr
Issued by
NWS Grand Junction, CO
Area
Storm-based polygon
Flood severity
None

County Montrose County, CO

The radar

The Grand Junction radar (KGJX), 74 km from the middle of the area, began a volume at 22:55 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.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 10.9 hours before the alert went out and 83 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-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2024-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 15 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2024-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
15 J/kg
Mixed-layer CIN
-450 J/kg
Mixed-layer LCL
1395 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

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 Jun 22, 2:06 PM MDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jun 22, 2:06 PM MDT, 2 hours 50 minutes before
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Hazardous weather outlook, Jun 22, 4:57 AM MDT, 11 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Grand Junction CO
457 AM MDT Sat Jun 22 2024

COZ001>014-017>023-UTZ022>025-027>029-231100-
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-
457 AM MDT Sat Jun 22 2024

This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low, though
isolated heavy rain producing thunderstorms are possible from late
morning through midafternoon. Showers and thunderstorms will be less
widespread with the mountains favored. Thunderstorms are expected to
dissipate by sunset.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Thunderstorms become more scattered in coverage with a significantly
reduced threat for heavy rain or severe storms. Afternoon/evening
thunderstorms, more isolated in coverage, can be expected Sunday
through Tuesday. Storm coverage increases again for the latter part
of next week.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

In the hours before

Special weather statement, Jun 22, 2:05 PM MDT, 2 hours 51 minutes before
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Local storm report, Jun 22, 2:27 PM MDT, 2 hours 29 minutes before
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Special weather statement, Jun 22, 2:31 PM MDT, 2 hours 25 minutes before
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Local storm report, Jun 22, 2:55 PM MDT, 2 hours 1 minute before
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Special weather statement, Jun 22, 3:33 PM MDT, 1 hour 23 minutes before
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Local storm report, Jun 22, 4:02 PM MDT, 54 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 6:04 PM MDTSpecial Weather StatementGJTSan Miguel26 min
Jun 21, 6:14 PM MDTSevere Thunderstorm WarningGJTMesa, Montrose16 min
Jun 21, 6:27 PM MDTSevere Thunderstorm WarningGJTMesa, Montrose33 min
Jun 21, 6:28 PM MDTSpecial Weather StatementGJTMesa32 min
Jun 21, 6:45 PM MDTSpecial Weather StatementGJTGarfield30 min
Jun 21, 6:50 PM MDTSpecial Weather StatementGJTRoutt25 min
Jun 21, 6:57 PM MDTSpecial Weather StatementGJTMontrose33 min
Jun 21, 10:48 PM MDTSpecial Weather StatementGJTLa Plata27 min
Jun 22, 12:03 PM MDTSpecial Weather StatementGJT27 min
Jun 22, 1:20 PM MDTFlash Flood WarningGJTRio Blanco115 min
Jun 22, 1:22 PM MDTSpecial Weather StatementGJTRio Blanco23 min
Jun 22, 1:42 PM MDTSevere Thunderstorm WarningGJTRio Blanco33 min
Jun 22, 2:02 PM MDTSpecial Weather StatementGJTRio Blanco28 min
Jun 22, 2:05 PM MDTSpecial Weather StatementGJTRoutt25 min
Jun 22, 2:31 PM MDTSpecial Weather StatementGJTMontrose29 min
Jun 22, 3:03 PM MDTSevere Thunderstorm WarningGJTMesa, Montrose27 min
Jun 22, 3:33 PM MDTSpecial Weather StatementGJTArchuleta27 min
Jun 22, 5:16 PM MDTFlash Flood WarningGJTEagle, Garfield, Pitkin34 min
Jun 21, 7:21 PM MDTAreal Flood AdvisoryGJTGrand10 min
Jun 21, 7:31 PM MDTFlash Flood WarningGJTGrand2 hr
Jun 22, 12:20 PM MDTAreal Flood AdvisoryGJTUintah55 min
Jun 22, 2:41 PM MDTSevere Thunderstorm WarningGJTGrand34 min
Jun 22, 3:13 PM MDTSevere Thunderstorm WarningGJTGrand8 min

Nearby

Flash Flood Warnings in Colorado, 2024Every flash flood warning in 2024

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.