Alert archive / Colorado / Special Weather Statements in 2021
Special Weather Statement, NWS Grand Junction, CO
NWS Grand Junction, CO issued this special weather statement at Jul 24, 2021, 2:15 PM MDT for Montezuma County, Colorado. It was in force for 30 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, 2:15 PM MDT (20:15 UTC)
- Expired
- Jul 24, 2021, 2:45 PM MDT
- In force
- 30 min
- Issued by
- NWS Grand Junction, CO
County Montezuma County, CO
The radar
The Grand Junction radar (KGJX), 223 km from the middle of the area, began a volume at 20:16 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, 8.3 hours before the alert went out and 228 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
- 19 J/kg
- Mixed-layer CIN
- -266 J/kg
- Mixed-layer LCL
- 1844 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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 Grand Junction, CO wrote its last area forecast discussion before this special weather statement went out at Jul 24, 12:54 PM MDT, 1 hour 21 minutes earlier.
Area forecast discussion, Jul 24, 12:54 PM MDT, 1 hour 21 minutes before
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</html>Hazardous weather outlook, Jul 24, 5:49 AM MDT, 8 hours 26 minutes before
Hazardous Weather Outlook National Weather Service Grand Junction CO 549 AM MDT Sat Jul 24 2021 COZ001>014-017>023-UTZ022>025-027>029-251200- 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- 549 AM MDT Sat Jul 24 2021 This hazardous weather outlook is for eastern Utah and western Colorado. .DAY ONE...Today and Tonight Thunderstorm development will occur again by mid-day over the mountains with storms moving southwest into the adjacent valleys of the southern Colorado and Utah. Gusty winds...small hail and heavy rainfall will be threats with storms in the south today. With monsoonal moisture in place...localized flooding is also a concern with some storms and a Flash Flood Watch is in effect for southern portions of Utah and Colorado. Storms this evening will stratify out and linger through the early morning hours as light showers. .DAYS TWO THROUGH SEVEN...Sunday through Friday Daily scattered to numerous showers and thunderstorms can be expected from Sunday onward. Moderate to heavy rain and gusty winds will be the primary threats with storms along with lightning. .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
Special weather statement, Jul 24, 1:30 PM MDT, 45 minutes before
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</html>Local storm report, Jul 24, 1:31 PM MDT, 44 minutes before
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</html>Special weather statement, Jul 24, 1:32 PM MDT, 43 minutes before
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</html>Local storm report, Jul 24, 1:39 PM MDT, 36 minutes before
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</html>Special weather statement, Jul 24, 2:15 PM MDT, 0 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 |
|---|---|---|---|---|
| Jul 23, 6:04 PM MDT | Areal Flood Advisory | GJT | Rio Blanco | 116 min |
| Jul 23, 6:11 PM MDT | Areal Flood Advisory | GJT | Delta | 2 hr |
| Jul 23, 6:17 PM MDT | Special Weather Statement | GJT | Delta | 28 min |
| Jul 23, 6:37 PM MDT | Special Weather Statement | GJT | 38 min | |
| Jul 23, 7:04 PM MDT | Areal Flood Advisory | GJT | Mesa, Montrose | 109 min |
| Jul 23, 7:14 PM MDT | Areal Flood Advisory | GJT | Garfield, Mesa | 3 hr |
| Jul 23, 8:44 PM MDT | Areal Flood Advisory | GJT | Dolores, San Miguel | 2 hr |
| Jul 24, 3:51 AM MDT | Flash Flood Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 12 more | 17 hr |
| Jul 24, 11:57 AM MDT | Special Weather Statement | GJT | Garfield | 48 min |
| Jul 24, 12:34 PM MDT | Areal Flood Advisory | GJT | Delta, Gunnison, Mesa, Pitkin | 3 hr |
| Jul 24, 12:41 PM MDT | Special Weather Statement | GJT | Delta | 49 min |
| Jul 24, 1:30 PM MDT | Special Weather Statement | GJT | Delta | 30 min |
| Jul 24, 1:30 PM MDT | Special Weather Statement | GJT | Garfield | 45 min |
| Jul 24, 1:32 PM MDT | Special Weather Statement | GJT | Ouray | 28 min |
| Jul 24, 1:36 PM MDT | Areal Flood Advisory | GJT | Garfield, Mesa | 13 min |
| Jul 24, 1:46 PM MDT | Areal Flood Advisory | GJT | San Miguel | 3 hr |
| Jul 24, 1:49 PM MDT | Flash Flood Warning | GJT | Garfield, Mesa | 3 hr |
| Jul 24, 2:09 PM MDT | Areal Flood Advisory | GJT | San Miguel | 55 min |
| Jul 24, 2:34 PM MDT | Areal Flood Advisory | GJT | Montrose, San Miguel | 30 min |
| Jul 24, 2:45 PM MDT | Special Weather Statement | GJT | Montezuma | 15 min |
| Jul 24, 3:03 PM MDT | Flash Flood Warning | GJT | Montrose, San Miguel | 3 hr |
| Jul 24, 3:12 PM MDT | Flash Flood Warning | GJT | Garfield, Mesa | 82 min |
| Jul 24, 3:27 PM MDT | Areal Flood Advisory | GJT | Montezuma | 2 hr |
| Jul 24, 3:28 PM MDT | Flash Flood Warning | GJT | Eagle, Garfield | 69 min |
| Jul 24, 3:45 PM MDT | Areal Flood Advisory | GJT | Montrose | 4 min |
| Jul 24, 3:47 PM MDT | Flash Flood Warning | GJT | Montrose | 3 hr |
| Jul 24, 3:55 PM MDT | Flash Flood Warning | GJT | Mesa, Montrose | 3 hr |
| Jul 23, 7:24 PM MDT | Areal Flood Advisory | GJT | Grand, San Juan | 3 hr |
| Jul 24, 1:26 PM MDT | Areal Flood Advisory | GJT | San Juan | 3 hr |
| Jul 24, 3:35 PM MDT | Flash Flood Warning | GJT | San Juan | 3 hr |
| Jul 24, 3:42 PM MDT | Flash Flood Warning | GJT | San Juan | 2 hr |
Nearby
Special Weather Statements in Colorado, 2021Every 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.