Alert archive / Colorado / Flash Flood Warnings in 2021
Flash Flood Warning 35, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood warning at Jul 25, 2021, 6:51 PM MDT for Garfield County, Mesa County, Colorado. It was in force for 114 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 25, 2021, 6:51 PM MDT (00:51 UTC)
- Expired
- Jul 25, 2021, 8:45 PM MDT
- In force
- 114 min
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Garfield County, CO, Mesa County, CO
The radar
The Grand Junction radar (KGJX), 48 km from the middle of the area, began a volume at 00:52 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 00:00Z, 0.9 hours before the alert went out and 31 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
- 126 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 2890 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
884
WGUS55 KGJT 260051
FFWGJT
COC045-077-260245-
/O.NEW.KGJT.FF.W.0035.210726T0051Z-210726T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Grand Junction CO
651 PM MDT Sun Jul 25 2021
The National Weather Service in Grand Junction has issued a
* Flash Flood Warning for...
The Pine Gulch Fire Burn Area in...
Southwestern Garfield County in west central Colorado...
North Central Mesa County in west central Colorado...
* Until 845 PM MDT.
* At 651 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the Pine Gulch Fire Burn Area. The expected
rainfall rate is 0.5 to 1 inch in 1 hour. Flash flooding is
ongoing or expected to begin shortly.
Excessive rainfall over the burn scar will result in debris flow
moving through the Pine Gulch Burn area. The debris flow can consist
of rock, mud, vegetation and other loose materials.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding in and around the Pine Gulch
Fire Burn Area.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of areas in and around
the Pine Gulch Fire Burn Area.
* Some locations that will experience flash flooding include...
mainly rural areas of Southwestern Garfield and North Central Mesa
Counties
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a life threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of creeks...streams...and
ditches in the Pine Gulch Fire Burn Area. Severe debris flows can
also be anticipated across roads. Roads and driveways may be washed
away in places. If you encounter flood waters...climb to safety.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3936 10866 3937 10866 3939 10865 3940 10870
3944 10876 3943 10878 3946 10879 3951 10875
3953 10861 3951 10838 3949 10832 3942 10827
3939 10837 3937 10840 3937 10841 3936 10842
3932 10851 3929 10853 3929 10858
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR
$$
MDM/NL1 follow-up statement
207
WGUS75 KGJT 260243
FFSGJT
Flash Flood Statement
National Weather Service Grand Junction CO
843 PM MDT Sun Jul 25 2021
COC045-077-260253-
/O.EXP.KGJT.FF.W.0035.000000T0000Z-210726T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Garfield CO-Mesa CO-
843 PM MDT Sun Jul 25 2021
...FLASH FLOOD WARNING FOR THE PINE GULCH FIRE BURN AREA WILL EXPIRE
AT 845 PM MDT THIS EVENING FOR SOUTHWESTERN GARFIELD AND NORTH
CENTRAL MESA COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3936 10866 3937 10866 3939 10865 3940 10870
3944 10876 3943 10878 3946 10879 3951 10875
3953 10861 3951 10838 3949 10832 3942 10827
3939 10837 3937 10840 3937 10841 3936 10842
3932 10851 3929 10853 3929 10858
$$
NLThe office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 25, 6:03 PM MDT | Special Weather Statement | GJT | 42 min | |
| Jul 25, 7:19 PM MDT | Flash Flood Warning | GJT | Mesa | 3 hr |
| Jul 25, 7:39 PM MDT | Flash Flood Warning | GJT | Eagle, Garfield | 81 min |
| Jul 25, 8:03 PM MDT | Special Weather Statement | GJT | Mesa | 42 min |
| Jul 25, 8:42 PM MDT | Areal Flood Advisory | GJT | Mesa | 3 hr |
| Jul 25, 11:03 PM MDT | Areal Flood Advisory | GJT | Mesa | 2 hr |
| Jul 25, 11:35 PM MDT | Flash Flood Warning | GJT | Mesa | 115 min |
| Jul 26, 12:03 PM MDT | Flash Flood Watch | GJT | Delta, Dolores, Eagle, Garfield, Mesa, Moffat and 6 more | 10 hr |
| Jul 26, 4:06 PM MDT | Areal Flood Advisory | GJT | La Plata | 3 hr |
| Jul 26, 4:37 PM MDT | Areal Flood Advisory | GJT | Montezuma | 3 hr |
| Jul 26, 5:14 PM MDT | Areal Flood Advisory | GJT | Dolores | 3 hr |
| Jul 26, 5:50 PM MDT | Flash Flood Warning | GJT | Mesa, Montrose | 114 min |
| Jul 26, 5:52 PM MDT | Special Weather Statement | GJT | 38 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.