Alert archive / Colorado / Flash Flood Warnings in 2011
Flash Flood Warning 3, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at May 24, 2011, 3:56 PM MDT for Phillips County, Colorado. It was in force for 6 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
- May 24, 2011, 3:56 PM MDT (21:56 UTC)
- Expired
- May 24, 2011, 10:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Phillips County, CO
The radar
The Goodland radar (KGLD), 146 km from the middle of the area, began a volume at 21:56 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
Denver, CO (KDNR), launched 12:00Z, 9.9 hours before the alert went out and 109 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
- 291 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 996 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
154
WGUS55 KBOU 242156
FFWBOU
COC095-250100-
/O.NEW.KBOU.FF.W.0003.110524T2156Z-110525T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
356 PM MDT TUE MAY 24 2011
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
PHILLIPS COUNTY IN NORTHEAST COLORADO
* UNTIL 700 PM MDT
* AT 356 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM THUNDERSTORMS ALONG A LINE EXTENDING FROM 5
MILES SOUTH OF PLEASANT VALLEY TO 11 MILES SOUTH OF HIGHLAND
CENTER...OR ALONG A LINE EXTENDING FROM 9 MILES EAST OF HOLYOKE TO
22 MILES SOUTHWEST OF HOLYOKE. THESE STORMS WERE MOVING NORTHWEST
AT 5 MPH.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAGES...
PLEASANT VALLEY...PAOLI...HOLYOKE...HIGHLAND CENTER...HAXTUN...
FAIRFIELD AND AMHERST.
DOPPLER RADAR ESTIMATES THAT THESE STORMS WILL PRODUCE 1.5 TO 2
INCHES OF RAIN IN AN HOUR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. TURN AROUND...DO NOT DROWN.
&&
LAT...LON 4044 10204 4043 10208 4044 10267 4070 10267
4071 10265 4075 10265 4075 10205
$$
BARJENBRUCH4 follow-up statements
931
WGUS75 KBOU 242311
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
511 PM MDT TUE MAY 24 2011
COC095-250100-
/O.CON.KBOU.FF.W.0003.000000T0000Z-110525T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILLIPS CO-
511 PM MDT TUE MAY 24 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 PM MDT FOR
PHILLIPS COUNTY...
AT 503 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY
HEAVY RAIN FROM A THUNDERSTORM 6 MILES SOUTHWEST OF HOLYOKE. THIS
STORM WAS MOVING SOUTHWEST AT 10 MPH.
LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WAGES...PLEASANT VALLEY...PAOLI...HOLYOKE...HIGHLAND
CENTER...HAXTUN...FAIRFIELD AND AMHERST. THIS WARNING ALSO INCLUDES
SANDY CREEK AND PATENT CREEK.
DOPPLER RADAR ESTIMATES THAT BETWEEN 2 AND 3 INCHES OF RAIN HAS
FALLEN ALONG THE PHILLIPS AND YUMA COUNTY LINE SOUTH AND SOUTHWEST
OF HOLYOKE. ADDITIONAL RAINFALL WILL CONTINUE THROUGH 7 PM WITH
POTENTIAL FOR ANOTHER INCH OF RAIN FROM EMBEDDED THUNDERSTORMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY.
TURN AROUND...DONT DROWN. NEVER TRY TO CROSS A FLOWING
STREAM...EVEN A SMALL ONE...ON FOOT.
&&
LAT...LON 4044 10204 4043 10208 4044 10267 4070 10267
4071 10265 4075 10265 4075 10205
$$
BARJENBRUCH328
WGUS55 KBOU 250056
FFWBOU
COC095-250400-
/O.EXT.KBOU.FF.W.0003.000000T0000Z-110525T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
656 PM MDT TUE MAY 24 2011
THE NATIONAL WEATHER SERVICE IN DENVER HAS EXTENDED THE
* FLASH FLOOD WARNING FOR...
PHILLIPS COUNTY IN NORTHEAST COLORADO
* UNTIL 1000 PM MDT
* AT 652 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM 4 MILES NORTH OF HOLYOKE. THIS
STORM WAS MOVING SOUTHWEST AT 20 MPH...AND MORE STORMS WILL
CONTINUE TO MOVE INTO PHILLIPS COUNTY THROUGH 9 PM.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAGES...
PLEASANT VALLEY...PAOLI...HOLYOKE...HIGHLAND CENTER...HAXTUN...
FAIRFIELD AND AMHERST.
DOPPLER RADAR ESTIMATES THAT BETWEEN 1 AND 3 INCHES OF RAIN HAS FALLEN
OVER MOST OF PHILLIPS COUNTY LATE THIS AFTERNOON AND EVENING...WITH THE
HEAVIEST TOTALS ALONG THE PHILLIPS AND YUMA COUNTY LINE SOUTH AND
SOUTHWEST OF HOLYOKE. ANOTHER ONE HALF TO 1.5 INCHES OF RAIN CAN BE
EXPECTED BEFORE DECREASING AROUND 9 PM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO
ESCAPE RISING WATER CLIMB TO HIGHER GROUND.
&&
LAT...LON 4044 10204 4043 10208 4044 10267 4070 10267
4071 10265 4075 10265 4075 10205
$$
BARJENBRUCH637
WGUS75 KBOU 250242
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
842 PM MDT TUE MAY 24 2011
COC095-250400-
/O.CON.KBOU.FF.W.0003.000000T0000Z-110525T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILLIPS CO-
842 PM MDT TUE MAY 24 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
PHILLIPS COUNTY...
AT 839 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE HEAVY RAIN AND THUNDERSTORMS ACROSS MUCH OF PHILLIPS
COUNTY. RAINFALL RATES OF ONE HALF TO ONE INCH PER HOUR CAN BE
EXPECTED FROM THE STRONGEST STORMS THROUGH 10 PM.
LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WAGES...PLEASANT VALLEY...PAOLI...HOLYOKE...HIGHLAND CENTER...
HAXTUN...FAIRFIELD AND AMHERST.
DOPPLER RADAR ESTIMATES THAT BETWEEN 1 AND 3 INCHES OF RAIN HAS
FALLEN ACROSS MOST OF THE COUNTY. ADDITIONAL RAINFALL AMOUNTS OF
ONE HALF TO 1.5 INCHES CAN STILL BE EXPECTED.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY AS THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY. DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A
FEW INCHES OF RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR
VEHICLE. TURN AROUND...DO NOT DROWN.
&&
LAT...LON 4044 10204 4043 10208 4044 10267 4070 10267
4071 10265 4075 10265 4075 10205
$$
BARJENBRUCH065
WGUS75 KBOU 250358
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
958 PM MDT TUE MAY 24 2011
COC095-250407-
/O.EXP.KBOU.FF.W.0003.000000T0000Z-110525T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILLIPS CO-
958 PM MDT TUE MAY 24 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1000 PM MDT FOR PHILLIPS
COUNTY...
THE FLASH FLOOD WARNING HAS BEEN REPLACED BY A SMALL STREAM FLOOD
ADVISORY.
LAT...LON 4044 10204 4043 10208 4044 10267 4070 10267
4071 10265 4075 10265 4075 10205
$$
BARJENBRUCHThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 6:39 PM MDT | Special Weather Statement | BOU | Sedgwick | 36 min |
| May 24, 1:35 AM MDT | Special Weather Statement | BOU | Elbert | 40 min |
| May 24, 9:19 AM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 41 min |
| May 24, 9:27 AM MDT | Flash Flood Watch | BOU | Logan, Morgan, Phillips, Sedgwick, Washington | 19 hr |
| May 24, 12:01 PM MDT | Special Weather Statement | BOU | Lincoln | 44 min |
| May 24, 12:29 PM MDT | Areal Flood Advisory | BOU | Morgan | 116 min |
| May 24, 2:55 PM MDT | Flash Flood Warning | BOU | Washington | 6 hr |
| May 24, 3:45 PM MDT | Special Weather Statement | BOU | Phillips | 45 min |
Nearby
Flash Flood Warnings in Colorado, 2011Every flash flood warning in 2011
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.