Alert archive / Montana / Special Weather Statements in 2011

Special Weather Statement, NWS Billings, MT

July 7, 2011Rosebud County, Treasure County, Montana

NWS Billings, MT issued this special weather statement at Jul 7, 2011, 9:31 PM MDT for Rosebud County, Treasure County, Montana. It was in force for 59 min. 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 7, 2011, 9:31 PM MDT (03:31 UTC)
Expired
Jul 7, 2011, 10:30 PM MDT
In force
59 min
Issued by
NWS Billings, MT

Counties Rosebud County, MT, Treasure County, MT

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 3.5 hours before the alert went out and 222 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 2011-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 430 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°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 2011-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 1 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
430 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
2286 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
1 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Billings, MT wrote its last area forecast discussion before this special weather statement went out at Jul 7, 9:22 PM MDT, 9 minutes earlier.

Area forecast discussion, Jul 7, 9:22 PM MDT, 9 minutes before
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Hazardous weather outlook, Jul 7, 3:31 PM MDT, 6 hours before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
331 PM MDT THU JUL 7 2011

MTZ028>042-056>058-063>068-WYZ098-099-082145-
SOUTHERN WHEATLAND-MUSSELSHELL-TREASURE-NORTHERN ROSEBUD-CUSTER-
FALLON-NORTHERN STILLWATER-YELLOWSTONE-POWDER RIVER-CARTER-
SOUTHERN BIG HORN-EASTERN CARBON-NORTHERN PARK-
NORTHERN SWEET GRASS-GOLDEN VALLEY-RED LODGE FOOTHILLS-
NORTHERN BIG HORN-SOUTHERN ROSEBUD-JUDITH GAP-PARADISE VALLEY-
LIVINGSTON AREA-BEARTOOTH FOOTHILLS-ABSAROKA/BEARTOOTH MOUNTAINS-
CRAZY MOUNTAINS-NORTHEAST BIG HORN MOUNTAINS-SHERIDAN FOOTHILLS-
331 PM MDT THU JUL 7 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL
MONTANA...SOUTH CENTRAL MONTANA...SOUTHEAST MONTANA AND NORTH
CENTRAL WYOMING.

.DAY ONE...THIS AFTERNOON AND TONIGHT

SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH LATE TONIGHT. SOME
OF THESE STORMS WILL BE CAPABLE OF PRODUCING LARGE HAIL. SOME
STORMS MAY ALSO PRODUCE HEAVY RAINFALL...WHICH MAY RESULT IN
LOCALIZED FLASH FLOODING.

RIVERS AND AREA STREAMS WILL REMAIN AROUND OR ABOVE FLOOD STAGE.
STREAM FLOWS WILL BE STRONGER THAN NORMAL. PAY CLOSE ATTENTION TO
RIVER LEVELS IF YOU ARE ON OR NEAR THE WATER.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

ANOTHER CHANCE OF THUNDERSTORMS WILL OCCUR FRIDAY AND FRIDAY
NIGHT AS A COLD FRONT MOVES THROUGH THE AREA. THERE IS THE
POTENTIAL FOR A FEW SEVERE STORMS WITH LARGE HAIL AND LOCALLY
HEAVY RAINFALL ALONG AND EAST OF A ROUNDUP TO LAUREL TO RED LODGE
LINE.

FLOODING AND HIGH WATER DUE TO SNOW MELT WILL CONTINUE AS THE
WEATHER REMAINS WARM. TAKE STEPS TO PROTECT PROPERTY AND
LIVESTOCK IF LOCATED NEAR LOCAL WATERWAYS OR IN AREAS PRONE TO
FLOODING FROM SNOW MELT.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

In the hours before

Special weather statement, Jul 7, 6:40 PM MDT, 2 hours 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BILLINGS MT
640 PM MDT THU JUL 7 2011

MTZ029-034-035-039-041-042-066>068-080145-
ABSAROKA/BEARTOOTH MOUNTAINS MT-BEARTOOTH FOOTHILLS MT-CRAZY
MOUNTAINS MT-EASTERN CARBON MT-GOLDEN VALLEY MT-MUSSELSHELL
MT-NORTHERN STILLWATER MT-NORTHERN SWEET GRASS MT-YELLOWSTONE MT-
640 PM MDT THU JUL 7 2011

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME NORTHERN CARBON...
SOUTHERN GOLDEN VALLEY...STILLWATER...SWEET GRASS...WESTERN
YELLOWSTONE AND SOUTHERN MUSSELSHELL COUNTIES UNTIL 745 PM MDT...

AT 700 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
CLUSTER OF THUNDERSTORMS IMPACTING MUCH OF SWEET GRASS AND
STILLWATER COUNTIES...AND MOVING INTO EASTERN YELLOWSTONE COUNTY
OVER THE NEXT HOUR...MOVING NORTHEAST AT 15 MPH.

HEAVY RAIN IS EXPECTED WITH THIS STORM...ALONG WITH HAIL UP TO THE
SIZE OF PENNIES

AREAS AFFECTED BY THIS STORM INCLUDE...BIG TIMBER...COLUMBUS...
BILLINGS...ABSAROKEE...LAUREL...BILLINGS WEST END...BILLINGS
HEIGHTS...LOCKWOOD...SHEPHERD...HUNTLEY...GREYCLIFF...REED POINT...
SOURDOUGH...RAPELJE...HALFBREED LAKE WILDLIFE...HAILSTONE WILDLIFE
REFUGE...PARK CITY...MOLT...BROADVIEW AND COMANCHE.

THIS INCLUDES INTERSTATE 94 BETWEEN MILE MARKERS 10 AND 9.

THIS INCLUDES HIGHWAY 212 BETWEEN MILE MARKERS 55 AND 58.

THIS INCLUDES INTERSTATE 90 BETWEEN MILE MARKERS 354 AND 468.

THIS INCLUDES MONTANA HIGHWAY 87 BETWEEN MILE MARKERS 10 AND 9.

THIS INCLUDES MONTANA HIGHWAY 310 BETWEEN MILE MARKERS 47 AND 54.

THIS INCLUDES MONTANA STATE HIGHWAY 78 BETWEEN MILE MARKERS 31 AND
47.

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

LAT...LON 4625 10838 4567 10813 4538 11020 4578 11022
      4579 11025 4605 11028
TIME...MOT...LOC 0038Z 237DEG 7KT 4560 10982
Local storm report, Jul 7, 7:09 PM MDT, 2 hours 22 minutes before
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Local storm report, Jul 7, 7:18 PM MDT, 2 hours 13 minutes before
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Special weather statement, Jul 7, 7:44 PM MDT, 1 hour 47 minutes before
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Special weather statement, Jul 7, 7:56 PM MDT, 1 hour 35 minutes before
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Special weather statement, Jul 7, 9:31 PM MDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 7, 6:23 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Wheatland29 min
Jul 7, 6:40 PM MDTSpecial Weather StatementBYZStillwater, Sweet Grass, Yellowstone65 min
Jul 7, 6:41 PM MDTSevere Thunderstorm WarningBYZGolden Valley60 min
Jul 7, 7:17 PM MDTSevere Thunderstorm WarningBYZMusselshell, Stillwater, Yellowstone33 min
Jul 7, 7:44 PM MDTSpecial Weather StatementBYZMusselshell61 min
Jul 7, 7:56 PM MDTSpecial Weather StatementBYZGolden Valley, Wheatland64 min
Jul 7, 8:12 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Musselshell, Stillwater, Yellowstone50 min
Jul 7, 8:38 PM MDTSevere Thunderstorm WarningBYZMusselshell, Rosebud, Treasure, Yellowstone42 min
Jul 7, 10:26 PM MDTSpecial Weather StatementBYZRosebud, Treasure49 min
Jul 7, 11:20 PM MDTSpecial Weather StatementBYZCuster55 min
Jul 8, 12:00 AM MDTSpecial Weather StatementBYZTreasure60 min
Jul 8, 12:23 AM MDTSpecial Weather StatementBYZCuster52 min
Jul 8, 2:45 PM MDTSpecial Weather StatementBYZStillwater, Sweet Grass60 min
Jul 8, 3:17 PM MDTSpecial Weather StatementBYZPark58 min
Jul 8, 3:40 PM MDTSpecial Weather StatementBYZYellowstone65 min
Jul 8, 3:52 PM MDTSevere Thunderstorm WarningBYZCarbon, Stillwater, Yellowstone53 min
Jul 8, 4:19 PM MDTSevere Thunderstorm WarningBYZMusselshell, Yellowstone56 min
Jul 8, 4:42 PM MDTSevere Thunderstorm WarningBYZBig Horn, Musselshell, Treasure, Yellowstone63 min
Jul 8, 5:50 PM MDTSpecial Weather StatementBYZRosebud, Treasure70 min

Nearby

Special Weather Statements in Montana, 2011Every special weather statement 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.