Alert archive / Colorado / Flash Flood Warnings in 2021
Flash Flood Warning 3, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood warning at Jun 27, 2021, 4:25 PM MDT for Eagle County, Garfield 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 outline as issued.
The facts
- Issued
- Jun 27, 2021, 4:25 PM MDT (22:25 UTC)
- Expired
- Jun 27, 2021, 6:30 PM MDT
- In force
- 2 hr
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Eagle County, CO, Garfield County, CO
The radar
The Grand Junction radar (KGJX), 108 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 125 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2010 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
492
WGUS55 KGJT 272225
FFWGJT
COC037-045-280030-
/O.NEW.KGJT.FF.W.0003.210627T2225Z-210628T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Grand Junction CO
425 PM MDT Sun Jun 27 2021
The National Weather Service in Grand Junction has issued a
* Flash Flood Warning for...
The Grizzly Creek Burn Area in...
Western Eagle County in west central Colorado...
East Central Garfield County in west central Colorado...
* Until 630 PM MDT.
* At 425 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain over the Grizzly Creek Burn Area. The expected rainfall
rate is 0.5 to 1 inch in 1 hour. Additional rainfall amounts of
0.3 to 0.5 inches are possible in the warned area. Flash flooding
is ongoing or expected to begin shortly.
Excessive rainfall over the burn scar will result in debris flow.
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 Grizzly
Creek Burn Area.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of areas in and around
the Grizzly Creek Burn Area.
* Some locations that will experience flash flooding include...
Shoshone.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3967 10719 3965 10718 3965 10714 3962 10713
3961 10714 3959 10710 3957 10711 3958 10715
3957 10715 3957 10716 3956 10714 3956 10718
3955 10717 3954 10720 3957 10729 3962 10729
3964 10720 3966 10721
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR
$$
MMS1 follow-up statement
579
WGUS75 KGJT 280026
FFSGJT
Flash Flood Statement
National Weather Service Grand Junction CO
626 PM MDT Sun Jun 27 2021
COC037-045-280036-
/O.EXP.KGJT.FF.W.0003.000000T0000Z-210628T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Eagle CO-Garfield CO-
626 PM MDT Sun Jun 27 2021
...FLASH FLOOD WARNING FOR THE GRIZZLY CREEK BURN AREA WILL EXPIRE
AT 630 PM MDT THIS EVENING FOR WESTERN EAGLE AND EAST CENTRAL
GARFIELD COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3967 10719 3965 10718 3965 10714 3962 10713
3961 10714 3959 10710 3957 10711 3958 10715
3957 10715 3957 10716 3956 10714 3956 10718
3955 10717 3954 10720 3957 10729 3962 10729
3964 10720 3966 10721
$$
MMSNearby
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.