Alert archive / Montana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 140, NWS Billings, MT

July 26, 2011Big Horn County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 26, 2011, 11:14 PM MDT for Big Horn County, Montana. It was in force for 31 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 26, 2011, 11:14 PM MDT (05:14 UTC)
Expired
Jul 26, 2011, 11:45 PM MDT
In force
31 min
Issued by
NWS Billings, MT
Area
Storm-based polygon

County Big Horn County, MT

The radar

The Billings radar (KBLX), 99 km from the middle of the area, began a volume at 05:15 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, 5.2 hours before the alert went out and 318 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 2011-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2011-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
95 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

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 26, 8:58 PM MDT, 2 hours 16 minutes earlier.

Area forecast discussion, Jul 26, 8:58 PM MDT, 2 hours 16 minutes before
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Hazardous weather outlook, Jul 26, 2:38 PM MDT, 8 hours 36 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BILLINGS MT
238 PM MDT TUE JUL 26 2011

MTZ028>042-056>058-063>068-WYZ098-099-272045-
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-
238 PM MDT TUE JUL 26 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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.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 26, 8:21 PM MDT, 2 hours 53 minutes before
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Local storm report, Jul 26, 8:23 PM MDT, 2 hours 51 minutes before
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Local storm report, Jul 26, 8:37 PM MDT, 2 hours 37 minutes before
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Special weather statement, Jul 26, 9:09 PM MDT, 2 hours 5 minutes before
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Special weather statement, Jul 26, 9:15 PM MDT, 1 hour 59 minutes before
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Special weather statement, Jul 26, 10:36 PM MDT, 38 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 6:04 PM MDTSevere Thunderstorm WarningBYZCuster56 min
Jul 26, 6:32 PM MDTSevere Thunderstorm WarningBYZCuster43 min
Jul 26, 7:14 PM MDTSevere Thunderstorm WarningBYZCarter, Custer, Fallon46 min
Jul 26, 7:55 PM MDTSevere Thunderstorm WarningBYZCarter, Fallon28 min
Jul 26, 9:09 PM MDTSpecial Weather StatementBYZYellowstone66 min
Jul 26, 9:15 PM MDTSpecial Weather StatementBYZBig Horn60 min
Jul 26, 9:41 PM MDTSevere Thunderstorm WarningBYZGolden Valley, Musselshell18 min
Jul 26, 10:00 PM MDTSevere Thunderstorm WarningBYZBig Horn30 min
Jul 26, 10:31 PM MDTSevere Thunderstorm WarningBYZBig Horn29 min
Jul 26, 10:36 PM MDTSpecial Weather StatementBYZBig Horn54 min
Jul 26, 11:44 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud46 min
Jul 27, 12:31 AM MDTSpecial Weather StatementBYZ59 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.