Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 49, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jul 20, 2012, 6:13 PM MDT for Flathead County, Lake County, Lincoln County, Montana. It was in force for 62 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 20, 2012, 6:13 PM MDT (00:13 UTC)
- Expired
- Jul 20, 2012, 7:15 PM MDT
- In force
- 62 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Flathead County, MT, Lake County, MT, Lincoln County, MT
The radar
The Missoula radar (KMSX), 190 km from the middle of the area, began a volume at 00:15 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 6:13 PM MDT | TSTM WND GST 70 | Eureka, MT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 20, 12:38 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 0.2 hours before the alert went out and 170 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
- 46 J/kg
- Mixed-layer CIN
- -200 J/kg
- Mixed-layer LCL
- 1692 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
840
WUUS55 KMSO 210013
SVRMSO
MTC029-047-053-210115-
/O.NEW.KMSO.SV.W.0049.120721T0013Z-120721T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
613 PM MDT FRI JUL 20 2012
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN LINCOLN COUNTY IN NORTHWEST MONTANA...
NORTHWESTERN LAKE COUNTY IN NORTHWEST MONTANA...
WESTERN FLATHEAD COUNTY IN NORTHWEST MONTANA...
* UNTIL 715 PM MDT.
* AT 606 PM MDT...LAW ENFORCEMENT REPORTED A LINE OF SEVERE
THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF
70 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 11
MILES NORTHWEST OF EUREKA TO 15 MILES SOUTHEAST OF EUREKA TO 17
MILES SOUTHWEST OF KALISPELL...OR ALONG A LINE EXTENDING FROM 45
MILES NORTH OF LIBBY TO 38 MILES NORTHEAST OF LIBBY TO 17 MILES
SOUTHWEST OF KALISPELL...AND WERE MOVING NORTHEAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...APGAR...COLUMBIA FALLS...CORAM...
CRESTON...EUREKA...EVERGREEN...FORTINE...HUNGRY HORSE...
KALISPELL...KILA...LA SALLE...LUPFER...MARION...MARTIN CITY...
OLNEY...POLEBRIDGE...RADNOR...REXFORD...SOMERS...STRYKER...
TRAILCREEK...TREGO...WEST GLACIER AND WHITEFISH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DAMAGING WINDS ARE LIKELY WITH THIS SEVERE THUNDERSTORM. LARGE HAIL
IS 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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FRIDAY
EVENING FOR NORTH CENTRAL IDAHO AND NORTHWESTERN MONTANA.
&&
LAT...LON 4901 11413 4826 11373 4789 11462 4863 11509
4900 11545 4902 11538
TIME...MOT...LOC 0013Z 235DEG 31KT 4903 11514 4873 11480
4803 11443
$$
KITSMILLER1 follow-up statement
600
WWUS55 KMSO 210107
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
707 PM MDT FRI JUL 20 2012
MTC029-047-053-210117-
/O.EXP.KMSO.SV.W.0049.000000T0000Z-120721T0115Z/
LINCOLN MT-LAKE MT-FLATHEAD MT-
707 PM MDT FRI JUL 20 2012
...THE SEVERE THUNDERSTORM WARNING FOR WESTERN FLATHEAD...
NORTHWESTERN LAKE AND NORTHEASTERN LINCOLN COUNTIES EXPIRES AT 715 PM
MDT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FRIDAY
EVENING FOR NORTHWESTERN MONTANA.
LAT...LON 4901 11413 4826 11373 4789 11462 4863 11509
4900 11545 4902 11538
TIME...MOT...LOC 0107Z 235DEG 31KT 4930 11456 4899 11422
4829 11386
$$
KITSMILLERNearby
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.