Alert archive / Montana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 95, NWS Billings, MT

July 14, 2011Big Horn County, Treasure County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 14, 2011, 6:28 PM MDT for Big Horn County, Treasure County, Montana. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 14, 2011, 6:28 PM MDT (00:28 UTC)
Expired
Jul 14, 2011, 7:30 PM MDT
In force
62 min
Issued by
NWS Billings, MT
Area
Storm-based polygon

Counties Big Horn County, MT, Treasure County, MT

The radar

The Billings radar (KBLX), 95 km from the middle of the area, began a volume at 00:31 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 14, 1:56 PM MDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.5 hours before the alert went out and 274 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°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 2011-07-15The 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

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 14, 6:28 PM MDT, 0 minutes earlier.

Area forecast discussion, Jul 14, 6:28 PM MDT, 0 minutes before
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Hazardous weather outlook, Jul 14, 10:25 AM MDT, 8 hours 3 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
1025 AM MDT THU JUL 14 2011

MTZ028>042-056>058-063>068-WYZ098-099-151630-
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-
1025 AM MDT THU JUL 14 2011

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

.DAY ONE...TODAY AND TONIGHT

STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED ACROSS SOUTH CENTRAL
AND SOUTHEASTERN MONTANA. STRONGEST STORMS ARE EXPECTED EAST AND
SOUTHEAST OF A LINE FROM ROUNDUP TO BILLINGS THIS EVENING. LARGE
HAIL...FREQUENT LIGHTNING...AND STRONG GUSTY WINDS CAN BE EXPECTED
WITH THESE THUNDERSTORMS. HEAVY RAIN IS ALSO EXPECTED...WHICH
COULD CAUSE LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE WEATHER PATTERN WILL REMAIN FAVORABLE FOR WIDELY SCATTERED
THUNDERSTORMS FRIDAY. THE POTENTIAL EXISTS FOR LOCALLY HEAVY
RAINFALL WITH THE THUNDERSTORM ACTIVITY.

VERY HOT TEMPERATURES ARE EXPECTED SUNDAY THROUGH TUESDAY WITH
HIGHS IN MANY LOCATIONS REACHING THE MID TO UPPER 90S. PROLONGED
EXPOSURE TO SUCH HOT TEMPERATURES CAN LEAD TO HEAT EXHAUSTION AND
HEAT STROKE...SO PLEASE TAKE THE NECESSARY PRECAUTIONS IF YOU ARE
PLANNING ON PARTICIPATING IN OUTDOOR ACTIVITIES.

EXPECT WATER LEVELS ON AREA RIVERS AND STREAMS TO CONTINUE TO
DECREASE GRADUALLY. NONETHELESS...RIVERS WILL REMAIN HIGH AND
FAST FOR THE FORESEEABLE FUTURE...AND CAUTION SHOULD BE USED WHEN
NEAR ANY WATERWAY UNTIL LEVELS SUBSIDE SIGNIFICANTLY.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Local storm report, Jul 14, 5:01 PM MDT, 1 hour 27 minutes before
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Special weather statement, Jul 14, 5:12 PM MDT, 1 hour 16 minutes before
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Local storm report, Jul 14, 5:38 PM MDT, 50 minutes before
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Local storm report, Jul 14, 6:10 PM MDT, 18 minutes before
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Local storm report, Jul 14, 6:15 PM MDT, 13 minutes before
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Local storm report, Jul 14, 6:25 PM MDT, 3 minutes before
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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, 6:45 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 MDTFlash Flood WarningBYZRosebud3 hr
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

Severe Thunderstorm Warnings in Montana, 2011Every severe thunderstorm 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.