Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 22, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 23, 2012, 7:14 PM MDT for Lake County, Missoula County, Sanders County, Montana. It was in force for 31 min. 2 reports 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
- Jun 23, 2012, 7:14 PM MDT (01:14 UTC)
- Expired
- Jun 23, 2012, 7:45 PM MDT
- In force
- 31 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Lake County, MT, Missoula County, MT, Sanders County, MT
The radar
The Missoula radar (KMSX), 15 km from the middle of the area, began a volume at 01:17 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 |
|---|---|---|---|
| Jun 23, 7:14 PM MDT | TSTM WND GST 79 | 6 Nw Missoula, MT | DOWNED TREE DAMAGED NEARBY BUILDING. QUARTER SIZE HAIL ALSO. |
| Jun 23, 7:16 PM MDT | HAIL 1 | 6 Nw Missoula, MT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Spokane, WA (KOTX), launched 00:00Z, 1.2 hours before the alert went out and 181 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
- 106 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- -144 m²/s²
- 0-3 km storm-relative helicity
- -99 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
505 WUUS55 KMSO 240114 SVRMSO MTC047-063-089-240145- /O.NEW.KMSO.SV.W.0022.120624T0114Z-120624T0145Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MISSOULA MT 714 PM MDT SAT JUN 23 2012 THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN SANDERS COUNTY IN NORTHWEST MONTANA... SOUTHERN LAKE COUNTY IN NORTHWEST MONTANA... CENTRAL MISSOULA COUNTY IN WEST CENTRAL MONTANA... * UNTIL 745 PM MDT. * AT 711 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED 6 MILES SOUTHEAST OF FRENCHTOWN...OR ABOUT 9 MILES NORTHWEST OF MISSOULA...AND WAS MOVING NORTH AT 30 MPH. * LOCATIONS IMPACTED INCLUDE...ARLEE...EVARO...FRENCHTOWN AND RAVALLI. 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. && LAT...LON 4729 11426 4726 11393 4685 11404 4687 11430 TIME...MOT...LOC 0114Z 187DEG 25KT 4696 11415 $$
1 follow-up statement
714 WWUS55 KMSO 240126 SVSMSO SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MISSOULA MT 726 PM MDT SAT JUN 23 2012 MTC047-063-089-240145- /O.CON.KMSO.SV.W.0022.000000T0000Z-120624T0145Z/ MISSOULA MT-LAKE MT-SANDERS MT- 726 PM MDT SAT JUN 23 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM MDT FOR SOUTHEASTERN SANDERS...SOUTHERN LAKE AND CENTRAL MISSOULA COUNTIES... * AT 718 PM MDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING DESTRUCTIVE WINDS OF 79 MPH. THIS STORM WAS LOCATED NEAR EVARO...OR ABOUT 11 MILES NORTHWEST OF MISSOULA...AND WAS MOVING NORTH AT 30 MPH. LAT...LON 4729 11426 4726 11393 4685 11404 4687 11430 TIME...MOT...LOC 0126Z 187DEG 25KT 4704 11413 $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 6:18 PM MDT | Special Weather Statement | MSO | Missoula | 27 min |
| Jun 23, 6:23 PM MDT | Special Weather Statement | MSO | Flathead | 52 min |
| Jun 23, 6:47 PM MDT | Special Weather Statement | MSO | Missoula | 43 min |
| Jun 23, 7:18 PM MDT | Areal Flood Advisory | MSO | Missoula | 94 min |
| Jun 23, 7:39 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula | 51 min |
| Jun 23, 7:52 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Lake, Missoula, Powell | 38 min |
| Jun 23, 8:21 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Missoula, Powell | 39 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.