Alert archive / North Dakota / Flash Flood Warnings in 2011
Flash Flood Warning 40, NWS Bismarck, ND
NWS Bismarck, ND issued this flash flood warning at Aug 5, 2011, 2:44 PM MDT for Billings County, Golden Valley County, Slope County, North Dakota. 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
- Aug 5, 2011, 2:44 PM MDT (20:44 UTC)
- Expired
- Aug 5, 2011, 4:56 PM MDT
- In force
- 2 hr
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Flood severity
- None
Counties Billings County, ND, Golden Valley County, ND, Slope County, ND
The radar
The Bismarck radar (KBIS), 234 km from the middle of the area, began a volume at 20:48 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.7 hours before the alert went out and 239 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
- 825 J/kg
- Mixed-layer CIN
- -179 J/kg
- Mixed-layer LCL
- 1272 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
291
WGUS53 KBIS 052044
FFWBIS
NDC007-033-087-060230-
/O.NEW.KBIS.FF.W.0040.110805T2044Z-110806T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
244 PM MDT FRI AUG 5 2011
THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN SLOPE COUNTY IN SOUTHWEST NORTH DAKOTA...
SOUTHERN GOLDEN VALLEY COUNTY IN SOUTHWEST NORTH DAKOTA...
SOUTHWESTERN BILLINGS COUNTY IN SOUTHWEST NORTH DAKOTA...
* UNTIL 830 PM MDT.
* AT 242 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RAINFALL RATES OF UP TO TWO INCHES PER HOUR ARE
POSSIBLE WITH THESE STORMS. THE STEEP TERRAIN OF THE BADLANDS WILL
ACCELERATE RUNOFF AND INCREASE THE THREAT FOR FLASH FLOODING.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. FLASH FLOODING IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS
OF NORTHWESTERN SLOPE...SOUTHERN GOLDEN VALLEY AND SOUTHWESTERN
BILLINGS COUNTIES...INCLUDING THE TOWNS OF ALPHA...GOLVA AND THREE
V CROSSING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
&&
LAT...LON 4675 10404 4703 10359 4664 10359 4652 10367
4650 10404
$$
AYD2 follow-up statements
449
WGUS73 KBIS 052129
FFSBIS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
429 PM CDT FRI AUG 5 2011
NDC007-033-087-060230-
/O.CON.KBIS.FF.W.0040.000000T0000Z-110806T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BILLINGS ND-GOLDEN VALLEY ND-SLOPE ND-
329 PM MDT FRI AUG 5 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHWESTERN SLOPE...
SOUTHERN GOLDEN VALLEY AND SOUTHWESTERN BILLINGS COUNTIES UNTIL 830
PM MDT...
AT 326 PM MDT...DOPPLER RADAR ESTIMATED THAT ONE AND A HALF TO TWO
INCHES OF RAIN HAS FALLEN ACROSS FAR SOUTHEAST GOLDEN VALLEY COUNTY.
DITCHES RUNNING FULL WITH WATER....AND WATER COVERED ROADWAYS ARE
POSSIBLE...ESPECIALLY IN THE STEEPER TERRAIN OF THE BADLANDS WHERE
RUNOFF IS ACCELERATED. ADDITIONAL THUNDERSTORMS WITH HEAVY RAINFALL
ARE POSSIBLE THROUGH THE EVENING.
IS EXPECTED TO OCCUR OVER MAINLY RURAL AREAS OF NORTHWESTERN SLOPE...
SOUTHERN GOLDEN VALLEY AND SOUTHWESTERN BILLINGS COUNTIES...INCLUDING
THE TOWNS OF ALPHA...GOLVA AND THREE V CROSSING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF WILL CAUSE FLOODING OF SMALL CREEKS AND
STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS FARMLAND
ALONG THE BANKS OF CREEKS AND STREAMS.
IN HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH
ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL
ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW
INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
&&
LAT...LON 4675 10404 4703 10359 4664 10359 4652 10367
4650 10404
$$
AYD780
WGUS73 KBIS 052256
FFSBIS
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
556 PM CDT FRI AUG 5 2011
NDC007-033-087-052310-
/O.CAN.KBIS.FF.W.0040.000000T0000Z-110806T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BILLINGS ND-GOLDEN VALLEY ND-SLOPE ND-
456 PM MDT FRI AUG 5 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHWESTERN
SLOPE...SOUTHERN GOLDEN VALLEY AND SOUTHWESTERN BILLINGS COUNTIES IS
CANCELLED...
WHILE ONE AND A HALF TO TWO INCHES OF RAINFALL HAS LIKELY FALLEN
ACROSS SOUTHEAST GOLDEN VALLEY COUNTY...SOUTHEAST OF
GOLVA...EXCESSIVE RUNOFF HAS LIKELY ENDED.
LAT...LON 4675 10404 4703 10359 4664 10359 4652 10367
4650 10404
$$
AYDThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 6:47 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Golden Valley, Slope, Stark | 58 min |
| Aug 4, 10:59 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Ward | 61 min |
| Aug 5, 12:00 AM MDT | Severe Thunderstorm Warning | BIS | McLean, Sheridan | 37 min |
| Aug 5, 1:59 AM MDT | Areal Flood Advisory | BIS | Sheridan, Wells | 6 hr |
| Aug 5, 11:18 AM MDT | Areal Flood Advisory | BIS | Billings, Dunn, Golden Valley, McKenzie | 6 hr |
| Aug 5, 1:19 PM MDT | Severe Thunderstorm Warning | BIS | Bowman, Slope | 56 min |
| Aug 5, 1:26 PM MDT | Severe Thunderstorm Warning | BIS | Billings, Golden Valley | 29 min |
| Aug 5, 2:18 PM MDT | Flash Flood Warning | BIS | Billings, Dunn, Stark | 6 hr |
| Aug 5, 2:51 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, Stark | 54 min |
| Aug 5, 3:13 PM MDT | Severe Thunderstorm Warning | BIS | Bowman | 47 min |
| Aug 5, 3:45 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, Stark | 60 min |
| Aug 5, 3:59 PM MDT | Flash Flood Warning | BIS | Stark | 6 hr |
| Aug 5, 4:23 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Hettinger, Mercer, Morton, Oliver, Stark | 67 min |
| Aug 5, 4:34 PM MDT | Tornado Warning | BIS | Morton | 26 min |
| Aug 5, 4:42 PM MDT | Areal Flood Advisory | BIS | Grant, Mercer, Morton, Oliver | 93 min |
| Aug 5, 5:04 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton, Oliver | 41 min |
| Aug 5, 5:19 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 39 min |
| Aug 5, 5:43 PM MDT | Severe Thunderstorm Warning | BIS | Burleigh, Emmons, Morton, Oliver | 62 min |
Nearby
Flash Flood Warnings in North Dakota, 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.