Alert archive / Montana / Flash Flood Warnings in 2011

Flash Flood Warning 21, NWS Billings, MT

July 14, 2011Rosebud County, Montana

NWS Billings, MT issued this flash flood warning at Jul 14, 2011, 10:29 PM MDT for Rosebud County, Montana. 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
Jul 14, 2011, 10:29 PM MDT (04:29 UTC)
Expired
Jul 15, 2011, 1:15 AM MDT
In force
3 hr
Issued by
NWS Billings, MT
Area
Storm-based polygon
Flood severity
None

County Rosebud County, MT

The radar

The Billings radar (KBLX), 177 km from the middle of the area, began a volume at 04:31 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

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.5 hours before the alert went out and 251 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.

Skew-T log-pSkew-T log-p diagram, Glasgow Intl Airport, MT at 00:00Z on 2011-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 272 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 00:00Z on 2011-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
272 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
2109 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

671 
WGUS55 KBYZ 150429
FFWBYZ
MTC087-150715-
/O.NEW.KBYZ.FF.W.0021.110715T0429Z-110715T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BILLINGS MT
1029 PM MDT THU JUL 14 2011

THE NATIONAL WEATHER SERVICE IN BILLINGS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN ROSEBUD COUNTY IN SOUTHEAST MONTANA...
  THIS INCLUDES THE CITY OF COLSTRIP...

* UNTIL 115 AM MDT

* NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES 2 TO 3 INCHES OF 
RAIN HAS FALLEN SOUTH OF INTERSTATE 94 IN SOUTHERN ROSEBUD COUNTY 
SINCE EARLY THIS EVENING. THIS INCLUDES THE COLSTRIP AREA. RAINFALL 
OF THIS MAGNITUDE WILL LIKELY CAUSE SOME FLASH FLOODING OF SMALL 
STREAMS AND LOW LYING AREAS. CREEKS WHICH MAY EXPERIENCE FLASH 
FLOODING INCLUDE THE WEST AND EAST FORKS OF ARMELLS CREEK...CORRAL 
CREEK AND STOCKER CREEK. RESIDENTS IN AREAS WHICH ARE PRONE TO FLASH 
FLOODING SHOULD TAKE ACTION TO PROTECT THEIR LIVES AND PROPERTY. 
PLEASE DO NOT DRIVE ON FLOODED ROADS.

* RAINFALL WILL END BY MIDNIGHT AS THE THUNDERSTORM ACTIVITY WEAKENS 
AND MOVES TO THE EAST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 4614 10615 4613 10620 4579 10619 4578 10623
      4568 10624 4568 10687 4618 10678 4625 10616

$$
2 follow-up statements
514 
WGUS75 KBYZ 150605
FFSBYZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
1205 AM MDT FRI JUL 15 2011

MTC087-150715-
/O.CON.KBYZ.FF.W.0021.000000T0000Z-110715T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROSEBUD MT-
1205 AM MDT FRI JUL 15 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM MDT FOR
SOUTHERN ROSEBUD COUNTY...

RAIN HAS ENDED OVER SOUTHERN ROSEBUD COUNTY. HOWEVER...NATIONAL 
WEATHER SERVICE DOPPLER RADAR INDICATED 2 TO 3 INCHES OF RAIN HAD 
FALLEN SOUTH OF INTERSTATE 94 IN SOUTHERN ROSEBUD COUNTY 
SINCE EARLY THIS EVENING. THIS INCLUDES THE COLSTRIP AREA. RAINFALL 
OF THIS MAGNITUDE WILL LIKELY CONTINUE TO CAUSE SOME FLASH FLOODING 
OF SMALL STREAMS AND LOW LYING AREAS. CREEKS WHICH MAY EXPERIENCE 
FLASH FLOODING INCLUDE THE WEST AND EAST FORKS OF ARMELLS 
CREEK...CORRAL CREEK AND STOCKER CREEK. RESIDENTS IN AREAS WHICH ARE 
PRONE TO FLASH FLOODING SHOULD TAKE ACTION TO PROTECT THEIR LIVES 
AND PROPERTY. PLEASE DO NOT DRIVE ON FLOODED ROADS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM MDT FRIDAY
MORNING FOR SOUTHEAST MONTANA.

&&

LAT...LON 4614 10615 4613 10620 4579 10619 4578 10623
      4568 10624 4568 10687 4618 10678 4625 10616

$$
898 
WGUS75 KBYZ 150714
FFSBYZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
114 AM MDT FRI JUL 15 2011

MTC087-150723-
/O.EXP.KBYZ.FF.W.0021.000000T0000Z-110715T0715Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ROSEBUD MT-
114 AM MDT FRI JUL 15 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 115 AM MDT FOR SOUTHERN
ROSEBUD COUNTY...

RAIN ENDED SEVERAL HOURS AGO OVER SOUTHERN ROSEBUD COUNTY AND THERE 
HAVE BEEN NO REPORTS OF ANY FLASH FLOODING...THUS THE FLASH FLOOD 
WARNING HAS BEEN ALLOWED TO EXPIRE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM MDT FRIDAY
MORNING FOR SOUTHEAST MONTANA.

LAT...LON 4614 10615 4613 10620 4579 10619 4578 10623
      4568 10624 4568 10687 4618 10678 4625 10616

$$

The office that day

Everything else NWS Billings, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 14, 6:01 PM MDTSevere Thunderstorm WarningBYZTreasure, Yellowstone59 min
Jul 14, 6:09 PM MDTSevere Thunderstorm WarningBYZMusselshell, Rosebud51 min
Jul 14, 6:28 PM MDTSevere Thunderstorm WarningBYZBig Horn, Treasure62 min
Jul 14, 6:45 PM MDTSpecial Weather StatementBYZRosebud60 min
Jul 14, 6:59 PM MDTSevere Thunderstorm WarningBYZRosebud, Treasure31 min
Jul 14, 7:12 PM MDTSpecial Weather StatementBYZMusselshell33 min
Jul 14, 7:16 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud, Treasure59 min
Jul 14, 7:33 PM MDTSpecial Weather StatementBYZCuster57 min
Jul 14, 7:45 PM MDTSevere Thunderstorm WarningBYZCuster, Rosebud60 min
Jul 14, 7:47 PM MDTSpecial Weather StatementBYZTreasure28 min
Jul 14, 8:02 PM MDTSevere Thunderstorm WarningBYZCuster, Powder River, Rosebud58 min
Jul 14, 8:19 PM MDTSpecial Weather StatementBYZRosebud41 min
Jul 14, 8:59 PM MDTSevere Thunderstorm WarningBYZCuster61 min
Jul 14, 9:03 PM MDTSpecial Weather StatementBYZRosebud57 min
Jul 14, 9:17 PM MDTSevere Thunderstorm WarningBYZRosebud58 min
Jul 14, 9:40 PM MDTSevere Thunderstorm WarningBYZCarter, Custer, Fallon50 min
Jul 14, 10:16 PM MDTSevere Thunderstorm WarningBYZRosebud29 min
Jul 14, 10:29 PM MDTSevere Thunderstorm WarningBYZFallon46 min
Jul 14, 11:02 PM MDTSpecial Weather StatementBYZRosebud58 min
Jul 14, 11:59 PM MDTSpecial Weather StatementBYZCuster61 min
Jul 15, 12:43 AM MDTSevere Thunderstorm WarningBYZCuster47 min
Jul 15, 1:29 AM MDTSevere Thunderstorm WarningBYZCuster, Fallon46 min
Jul 15, 2:17 AM MDTSpecial Weather StatementBYZFallon43 min
Jul 15, 2:22 AM MDTSpecial Weather StatementBYZFallon53 min
Jul 15, 4:25 PM MDTSpecial Weather StatementBYZGolden Valley65 min
Jul 15, 5:12 PM MDTSpecial Weather StatementBYZGolden Valley, Musselshell63 min
Jul 15, 5:55 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Musselshell65 min

Nearby

Flash Flood Warnings in Montana, 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.