Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 23, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Aug 2, 2012, 3:15 PM MDT for Carter County, Powder River County, Montana. It was in force for 26 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
- Aug 2, 2012, 3:15 PM MDT (21:15 UTC)
- Expired
- Aug 2, 2012, 3:41 PM MDT
- In force
- 26 min
- Issued by
- NWS Billings, MT
- Area
- Storm-based polygon
Counties Carter County, MT, Powder River County, MT
The radar
The Rapid City radar (KUDX), 231 km from the middle of the area, began a volume at 21:18 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 2, 2:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Rapid City, SD (KRAP), launched 12:00Z, 9.3 hours before the alert went out and 232 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2040 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -120 m²/s²
- 0-3 km storm-relative helicity
- -117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 2, 3:09 PM MDT, 6 minutes earlier.
Area forecast discussion, Aug 2, 3:09 PM MDT, 6 minutes before
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</html>Hazardous weather outlook, Aug 2, 3:06 AM MDT, 12 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BILLINGS MT 306 AM MDT THU AUG 2 2012 MTZ028>042-056>058-063>068-WYZ098-099-030915- 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- 306 AM MDT THU AUG 2 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MONTANA...SOUTH CENTRAL MONTANA...SOUTHEAST MONTANA AND NORTH CENTRAL WYOMING. .DAY ONE...TODAY AND TONIGHT CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON AND TONIGHT AS WINDS INCREASE AHEAD OF A STRONG COLD FRONT WHICH WILL CROSS THE REGION TONIGHT. THERE IS A CHANCE OF STRONG TO SEVERE THUNDERSTORMS OVER EASTERN PORTIONS OF SOUTHEAST MONTANA THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY FRIDAY WILL SEE COOLER TEMPERATURES AND HIGHER HUMIDITIES BUT WINDS ARE EXPECTED TO CONTINUE TO BE STRONG...WHICH WILL RESULT IN CRITICAL FIRE WEATHER CONDITIONS CONTINUING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. HOOLEY
In the hours before
Special weather statement, Aug 2, 1:33 PM MDT, 1 hour 42 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BILLINGS MT 133 PM MDT THU AUG 2 2012 MTZ032-033-036-037-022030- CARTER MT-CUSTER MT-FALLON MT-POWDER RIVER MT- 133 PM MDT THU AUG 2 2012 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN POWDER RIVER...WESTERN FALLON...SOUTHEASTERN CUSTER AND WESTERN CARTER COUNTIES UNTIL 230 PM MDT... AT 128 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT A LINE OF THUNDERSTORMS WERE RAPIDLY DEVELOPING FROM SOUTHEAST OF MILES CITY IN CUSTER COUNTY...SOUTHWARD TO NEAR BIDDLE IN POWDER RIVER COUNTY. THESE STORMS ARE MOVING EAST AT 15 MPH. STORMS THIS AFTERNOON WILL BE CAPABLE OF HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH...ALONG WITH HEAVY RAIN. AREAS AFFECTED THROUGH 230 PM INCLUDE...RIDGE...BOYES...HAMMOND AND POWDERVILLE. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. LISTEN FOR FURTHER UPDATES THIS AFTERNOON AS THESE STORMS MOVE EAST. LAT...LON 4499 10560 4618 10559 4620 10461 4499 10462 TIME...MOT...LOC 1930Z 250DEG 15KT 4558 10531
Local storm report, Aug 2, 2:07 PM MDT, 1 hour 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
207 PM MDT THU AUG 02 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0158 PM HAIL 3 SSE EPSIE 45.44N 105.63W
08/02/2012 E1.75 INCH POWDER RIVER MT COCORAHS
&&
VICKIESSpecial weather statement, Aug 2, 2:52 PM MDT, 23 minutes before
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</html>Local storm report, Aug 2, 3:10 PM MDT, 5 minutes before
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</html>The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 1:33 PM MDT | Special Weather Statement | BYZ | Powder River | 57 min |
| Aug 2, 1:46 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 59 min |
| Aug 2, 1:59 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 59 min |
| Aug 2, 2:19 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Powder River | 56 min |
| Aug 2, 2:52 PM MDT | Special Weather Statement | BYZ | Fallon | 53 min |
| Aug 2, 3:55 PM MDT | Special Weather Statement | BYZ | Carter | 65 min |
| Aug 2, 4:41 PM MDT | Special Weather Statement | BYZ | Carter | 34 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2012Every severe thunderstorm warning in 2012
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.