Alert archive / Colorado / Flash Flood Warnings in 2021
Flash Flood Warning 8, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood warning at Jul 13, 2021, 2:29 PM MDT for Hinsdale County, Ouray County, Colorado. It was in force for 3 hr. 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 13, 2021, 2:29 PM MDT (20:29 UTC)
- Expired
- Jul 13, 2021, 5:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hinsdale County, CO, Ouray County, CO
The radar
The Grand Junction radar (KGJX), 114 km from the middle of the area, began a volume at 20:32 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, 8.5 hours before the alert went out and 133 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
- 27 J/kg
- Mixed-layer CIN
- -350 J/kg
- Mixed-layer LCL
- 3436 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
028
WGUS55 KGJT 132029
FFWGJT
COC053-091-132330-
/O.NEW.KGJT.FF.W.0008.210713T2029Z-210713T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Grand Junction CO
229 PM MDT Tue Jul 13 2021
The National Weather Service in Grand Junction has issued a
* Flash Flood Warning for...
Northwestern Hinsdale County in southwestern Colorado...
East Central Ouray County in southwestern Colorado...
* Until 530 PM MDT.
* At 229 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Radar estimates between 0.6 and
1 inch of rain has fallen. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Ouray and Ridgway.
This includes the following highways...
Colorado 62 between mile markers 22 and 23.
U.S. Highway 550 in Colorado between mile markers 94 and 104.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3816 10758 3805 10752 3801 10773 3816 10778
3816 10775 3816 10774 3816 10772
FLASH FLOOD...RADAR INDICATED
$$
MDA2 follow-up statements
016
WGUS75 KGJT 132213
FFSGJT
Flash Flood Statement
National Weather Service Grand Junction CO
413 PM MDT Tue Jul 13 2021
COC053-091-132330-
/O.CON.KGJT.FF.W.0008.000000T0000Z-210713T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hinsdale CO-Ouray CO-
413 PM MDT Tue Jul 13 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM MDT THIS
AFTERNOON FOR NORTHWESTERN HINSDALE AND EAST CENTRAL OURAY
COUNTIES...
At 413 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Radar indicates between 0.7 and 1.3
inches of rain have fallen. Flash flooding is ongoing or expected to
begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Ouray and Ridgway.
This includes the following highways...
Colorado 62 between mile markers 22 and 23.
U.S. Highway 550 in Colorado between mile markers 94 and 104.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3816 10758 3805 10752 3801 10773 3816 10778
3816 10775 3816 10774 3816 10772
FLASH FLOOD...RADAR INDICATED
$$
MDA587
WGUS75 KGJT 132322
FFSGJT
Flash Flood Statement
National Weather Service Grand Junction CO
522 PM MDT Tue Jul 13 2021
COC053-091-132332-
/O.EXP.KGJT.FF.W.0008.000000T0000Z-210713T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hinsdale CO-Ouray CO-
522 PM MDT Tue Jul 13 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 530 PM MDT THIS AFTERNOON FOR
NORTHWESTERN HINSDALE AND EAST CENTRAL OURAY COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3816 10758 3805 10752 3801 10773 3816 10778
3816 10775 3816 10774 3816 10772
$$
MDAThe office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 11:51 AM MDT | Flash Flood Watch | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 3 hr |
| Jul 13, 12:28 PM MDT | Special Weather Statement | GJT | Rio Blanco | 47 min |
| Jul 13, 12:50 PM MDT | Special Weather Statement | GJT | San Juan | 25 min |
| Jul 13, 12:52 PM MDT | Special Weather Statement | GJT | 38 min | |
| Jul 13, 1:28 PM MDT | Special Weather Statement | GJT | San Juan | 47 min |
| Jul 13, 1:37 PM MDT | Special Weather Statement | GJT | Rio Blanco | 38 min |
| Jul 13, 1:43 PM MDT | Special Weather Statement | GJT | Pitkin | 47 min |
| Jul 13, 2:48 PM MDT | Special Weather Statement | GJT | 42 min | |
| Jul 13, 2:56 PM MDT | Special Weather Statement | GJT | Delta | 49 min |
| Jul 13, 3:06 PM MDT | Flash Flood Warning | GJT | Eagle, Garfield | 114 min |
| Jul 13, 3:11 PM MDT | Severe Thunderstorm Warning | GJT | Delta, Mesa | 34 min |
| Jul 13, 3:27 PM MDT | Areal Flood Advisory | GJT | Ouray, San Miguel | 3 hr |
| Jul 13, 3:33 PM MDT | Special Weather Statement | GJT | Mesa | 42 min |
| Jul 13, 3:52 PM MDT | Severe Thunderstorm Warning | GJT | Delta, Mesa | 23 min |
| Jul 13, 4:24 PM MDT | Special Weather Statement | GJT | Delta, Mesa | 51 min |
| Jul 13, 4:59 PM MDT | Flash Flood Watch | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 3 hr |
| Jul 13, 5:10 PM MDT | Special Weather Statement | GJT | Montrose | 50 min |
| Jul 13, 5:21 PM MDT | Special Weather Statement | GJT | 39 min | |
| Jul 13, 5:33 PM MDT | Special Weather Statement | GJT | Montrose | 42 min |
| Jul 13, 5:42 PM MDT | Special Weather Statement | GJT | Ouray | 48 min |
Nearby
Flash Flood Warnings in Colorado, 2021Every flash flood warning 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.