Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 25, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 23, 2012, 8:21 PM MDT for Flathead County, Missoula County, Powell County, Montana. It was in force for 39 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
- Jun 23, 2012, 8:21 PM MDT (02:21 UTC)
- Expired
- Jun 23, 2012, 9:00 PM MDT
- In force
- 39 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Flathead County, MT, Missoula County, MT, Powell County, MT
The radar
The Missoula radar (KMSX), 81 km from the middle of the area, began a volume at 02:21 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, 8:25 PM MDT | HAIL 1 | 11 Nnw Seeley Lake, MT |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 2.4 hours before the alert went out and 196 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
- 1027 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1751 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 7.4
The text
As transmitted, in the capitals the NWS used until 2016.
086
WUUS55 KMSO 240221
SVRMSO
MTC029-063-077-240300-
/O.NEW.KMSO.SV.W.0025.120624T0221Z-120624T0300Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
821 PM MDT SAT JUN 23 2012
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN FLATHEAD COUNTY IN NORTHWEST MONTANA...
NORTHEASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA...
NORTHWESTERN POWELL COUNTY IN WEST CENTRAL MONTANA...
* UNTIL 900 PM MDT.
* AT 817 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS
STORM WAS LOCATED OVER NORTHWESTERN POWELL COUNTY...OR ABOUT 41
MILES EAST OF POLSON...AND WAS MOVING NORTHEAST AT 30 MPH. THIS
STORM HAS A HISTORY OF PRODUCING LARGE HAIL AND 79 MPH WINDS.
* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF THE
INDICATED COUNTIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND HAIL...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 4725 11349 4734 11373 4784 11311 4778 11305
4774 11309 4773 11315 4766 11311 4759 11313
4756 11310 4749 11311 4748 11305 4735 11305
TIME...MOT...LOC 0220Z 223DEG 45KT 4752 11329
$$1 follow-up statement
902
WWUS55 KMSO 240258
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
858 PM MDT SAT JUN 23 2012
MTC029-063-077-240308-
/O.EXP.KMSO.SV.W.0025.000000T0000Z-120624T0300Z/
POWELL MT-MISSOULA MT-FLATHEAD MT-
858 PM MDT SAT JUN 23 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FLATHEAD...
NORTHEASTERN MISSOULA AND NORTHWESTERN POWELL COUNTIES EXPIRES AT 900
PM MDT...
LAT...LON 4725 11349 4734 11373 4784 11311 4778 11305
4774 11309 4773 11315 4766 11311 4759 11313
4756 11310 4749 11311 4748 11305 4735 11305
TIME...MOT...LOC 0258Z 223DEG 45KT 4787 11281
$$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, 7:14 PM MDT | Severe Thunderstorm Warning | MSO | Lake, Missoula, Sanders | 31 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 |
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.