Alert archive / Colorado / Flash Flood Warnings in 2016
Flash Flood Warning 13, NWS Grand Junction, CO
NWS Grand Junction, CO issued this flash flood warning at Aug 23, 2016, 5:53 PM MDT for Rio Blanco 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
- Aug 23, 2016, 5:53 PM MDT (23:53 UTC)
- Expired
- Aug 23, 2016, 8:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Grand Junction, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Rio Blanco County, CO
The radar
The Grand Junction radar (KGJX), 85 km from the middle of the area, began a volume at 23:53 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, 11.9 hours before the alert went out and 84 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
- 10 J/kg
- Mixed-layer CIN
- -274 J/kg
- Mixed-layer LCL
- 1577 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
297
WGUS55 KGJT 232353
FFWGJT
COC103-240245-
/O.NEW.KGJT.FF.W.0013.160823T2353Z-160824T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
553 PM MDT TUE AUG 23 2016
THE NATIONAL WEATHER SERVICE IN GRAND JUNCTION HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL RIO BLANCO COUNTY IN NORTHWESTERN COLORADO...
* UNTIL 845 PM MDT
* AT 550 PM MDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
RIO BLANCO AND COUNTY ROAD 5 NORTHWEST OF TOWN.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...PICEANCE
CREEK.
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.
&&
LAT...LON 3980 10796 3971 10795 3978 10819 3987 10835
3993 10826 3985 10813
$$
NL2 follow-up statements
140
WGUS75 KGJT 240127
FFSGJT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
727 PM MDT TUE AUG 23 2016
COC103-240245-
/O.CON.KGJT.FF.W.0013.000000T0000Z-160824T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RIO BLANCO CO-
727 PM MDT TUE AUG 23 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR
SOUTH CENTRAL RIO BLANCO COUNTY...
AT 721 PM MDT...LOCAL LAW ENFORCEMENT REPORTED FLASH FLOODING AND
MUDSLIDES OVER COUNTY ROAD 5 NORTH WEST OF RIO BLANCO. UP TO TWO
INCHES OF RAIN HAVE ALREADY FALLEN OVER THE AREA.
AS EXCESSIVE RAINFALL CONTINUES TO DRAIN FROM THE AREA LOCATIONS
ALONG COUNTY ROAD 5 NORTHWEST OF RIO BLANCO WILL CONTINUE
EXPERIENCE FLOODING IN SOME LOCATIONS.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...PICEANCE
CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.
&&
LAT...LON 3980 10796 3971 10795 3978 10819 3987 10835
3993 10826 3985 10813
$$
NL029
WGUS75 KGJT 240238
FFSGJT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
838 PM MDT TUE AUG 23 2016
COC103-240248-
/O.EXP.KGJT.FF.W.0013.000000T0000Z-160824T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RIO BLANCO CO-
838 PM MDT TUE AUG 23 2016
...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL RIO BLANCO COUNTY WILL
EXPIRE AT 845 PM MDT...
THE HEAVY RAIN HAS ENDED. FLOOD WATERS HAVE RECEDED. FLOODING IS NO
LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ANY
REMAINING ROAD CLOSURES.
LAT...LON 3980 10796 3971 10795 3978 10819 3987 10835
3993 10826 3985 10813
$$
NLThe office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 3:07 AM MDT | Flash Flood Watch | GJT | Archuleta, Delta, Dolores, Gunnison, Hinsdale, La Plata and 6 more | 19 hr |
| Aug 23, 4:06 PM MDT | Areal Flood Advisory | GJT | Mesa, Montrose | 3 hr |
Nearby
Flash Flood Warnings in Colorado, 2016Every flash flood warning in 2016
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.