Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 56, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 27, 2012, 11:11 PM MDT for Flathead County, Lake County, Montana. It was in force for 38 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 27, 2012, 11:11 PM MDT (05:11 UTC)
- Expired
- Jul 27, 2012, 11:49 PM MDT
- In force
- 38 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Flathead County, MT, Lake County, MT
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 5.2 hours before the alert went out and 225 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
- 328 J/kg
- Mixed-layer CIN
- -82 J/kg
- Mixed-layer LCL
- 2524 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
800
WUUS55 KMSO 280511
SVRMSO
MTC029-047-280615-
/O.NEW.KMSO.SV.W.0056.120728T0511Z-120728T0615Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
1111 PM MDT FRI JUL 27 2012
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
FLATHEAD COUNTY IN NORTHWEST MONTANA...
NORTHEASTERN LAKE COUNTY IN NORTHWEST MONTANA...
* UNTIL 1215 AM MDT.
* AT 1104 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER.
THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM BIGFORK TO
18 MILES SOUTH OF SWAN LAKE...OR ALONG A LINE EXTENDING FROM 12
MILES SOUTHEAST OF KALISPELL TO 19 MILES EAST OF POLSON...AND WERE
MOVING NORTHEAST AT 30 MPH.
* LOCATIONS IMPACTED INCLUDE...APGAR...BIGFORK...BLACKTAIL...COLUMBIA
FALLS...CORAM...CRESTON...ESSEX...EVERGREEN...FINLEY POINT...HUNGRY
HORSE...KALISPELL...LA SALLE...LAKE MCDONALD...LAKESIDE...LOGAN
PASS...MARTIN CITY...NYACK...PINNACLE...ROLLINS...SALMON PRAIRIE...
SOMERS...SWAN LAKE...WEST GLACIER...WHITEFISH AND WOODS BAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
LARGE HAIL IS LIKELY WITH THIS SEVERE THUNDERSTORM. DAMAGING WINDS
ARE POSSIBLE...ALONG WITH FREQUENT LIGHTNING AND HEAVY RAIN. FOR YOUR
PROTECTION...GO INDOORS AND STAY AWAY FROM WINDOWS. IF YOU ARE CAUGHT
OUTSIDE...MOVE TO A WELL PROTECTED AREA.
&&
LAT...LON 4874 11370 4862 11374 4855 11345 4846 11347
4842 11334 4834 11337 4825 11322 4818 11322
4813 11300 4802 11288 4793 11293 4791 11308
4778 11305 4773 11315 4761 11313 4760 11391
4745 11391 4743 11402 4843 11456 4878 11376
TIME...MOT...LOC 0510Z 236DEG 24KT 4810 11408 4770 11370
$$1 follow-up statement
685
WWUS55 KMSO 280549
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1149 PM MDT FRI JUL 27 2012
MTC029-047-280559-
/O.CAN.KMSO.SV.W.0056.000000T0000Z-120728T0615Z/
LAKE MT-FLATHEAD MT-
1149 PM MDT FRI JUL 27 2012
...THE SEVERE THUNDERSTORM WARNING FOR FLATHEAD AND NORTHEASTERN LAKE
COUNTIES IS CANCELLED...
THE STORMS HAVE WEAKENED BELOW SEVERE LIMITS HOWEVER MAY STILL
PRODUCE SMALL HAIL AND GUSTY WINDS.
LAT...LON 4874 11370 4862 11374 4855 11345 4846 11347
4842 11334 4834 11337 4825 11322 4818 11322
4813 11300 4802 11288 4793 11293 4791 11308
4778 11305 4773 11315 4761 11313 4760 11391
4745 11391 4743 11402 4843 11456 4878 11376
TIME...MOT...LOC 0549Z 236DEG 24KT 4825 11376 4784 11338
$$The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 8:27 PM MDT | Special Weather Statement | MSO | Lake | 63 min |
| Jul 27, 9:24 PM MDT | Special Weather Statement | MSO | Missoula | 66 min |
| Jul 27, 9:57 PM MDT | Special Weather Statement | MSO | Flathead | 63 min |
| Jul 27, 10:05 PM MDT | Special Weather Statement | MSO | Flathead | 70 min |
| Jul 27, 10:27 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 38 min |
| Jul 27, 10:47 PM MDT | Special Weather Statement | MSO | Flathead | 58 min |
| Jul 28, 12:44 AM MDT | Special Weather Statement | MSO | Flathead | 61 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.