Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 11, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jul 1, 2012, 5:46 PM MDT for Carter County, Fallon 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 counties it named.
The facts
- Issued
- Jul 1, 2012, 5:46 PM MDT (23:46 UTC)
- Expired
- Jul 1, 2012, 6:45 PM MDT
- In force
- 59 min
- Issued by
- NWS Billings, MT
- Area
- Storm-based polygon
Counties Carter County, MT, Fallon County, MT
The radar
The Rapid City radar (KUDX), 238 km from the middle of the area, began a volume at 23:48 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 |
|---|---|---|---|
| Jul 1, 4:04 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Rapid City, SD (KUNR), launched 12:00Z, 11.8 hours before the alert went out and 241 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
- 979 J/kg
- Mixed-layer CIN
- -306 J/kg
- Mixed-layer LCL
- 1390 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- -81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 1, 5:17 PM MDT, 29 minutes earlier.
Area forecast discussion, Jul 1, 5:17 PM MDT, 29 minutes before
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</html>Hazardous weather outlook, Jul 1, 3:02 PM MDT, 2 hours 44 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BILLINGS MT 302 PM MDT SUN JUL 1 2012 MTZ028>042-056>058-063>068-WYZ098-099-022200- 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- 302 PM MDT SUN JUL 1 2012 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 CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON AND TONIGHT. LATE AFTERNOON TEMPERATURES IN THE MID 90S TO AROUND 105 CAN BE EXPECTED...WITH RELATIVE HUMIDITIES AROUND 10 PERCENT. WINDS WILL SHIFT TO THE NORTHWEST BEHIND AN ADVANCING COLD FRONT. SCATTERED THUNDERSTORMS WILL DEVELOP LATE THIS AFTERNOON AND EVENING AS THE FRONT MOVES THROUGH. THUNDERSTORMS WILL HAVE STRONG AND ERRATIC WIND GUSTS. SOME STORMS MAY BE SEVERE OVER EASTERN MONTANA. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY HOT TEMPERATURES AND VERY LOW HUMIDITIES WILL RETURN TUESDAY. A COLD FRONT WILL PUSH THROUGH TUESDAY AFTERNOON AND EVENING. THIS FRONT WILL PRODUCE A STRONG NORTHWEST WIND SHIFT AND GENERATE ISOLATED THUNDERSTORMS AS IT MOVES THROUGH. THIS ALL TRANSLATES INTO ANOTHER POTENTIALLY CRITICAL FIRE WEATHER DAY. .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 1, 4:24 PM MDT, 1 hour 22 minutes before
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</html>Special weather statement, Jul 1, 4:53 PM MDT, 53 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 |
|---|---|---|---|---|
| Jul 1, 3:52 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 50 min |
| Jul 1, 4:53 PM MDT | Special Weather Statement | BYZ | Fallon | 67 min |
| Jul 1, 4:58 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Custer, Fallon | 62 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.