Alert archive / Montana / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 4, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 4, 2012, 3:41 PM MDT for Ravalli County, Montana. It was in force for 49 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
- Jun 4, 2012, 3:41 PM MDT (21:41 UTC)
- Expired
- Jun 4, 2012, 4:30 PM MDT
- In force
- 49 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
County Ravalli County, MT
The radar
The Missoula radar (KMSX), 95 km from the middle of the area, began a volume at 21:43 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 |
|---|---|---|---|
| Jun 4, 1:46 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Spokane, WA (KOTX), launched 12:00Z, 9.7 hours before the alert went out and 255 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
- 5 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 112 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
371
WUUS55 KMSO 042141
SVRMSO
MTC081-042230-
/O.NEW.KMSO.SV.W.0004.120604T2141Z-120604T2230Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
341 PM MDT MON JUN 4 2012
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN RAVALLI COUNTY IN WEST CENTRAL MONTANA...
* UNTIL 430 PM MDT.
* AT 334 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. THIS STORM
WAS LOCATED NEAR CONNER...OR ABOUT 23 MILES SOUTH OF HAMILTON...AND
WAS MOVING NORTH AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...CHARLOS HEIGHTS...COMO...CONNER...
CORVALLIS...DARBY...GRANTSDALE...HAMILTON AND SKALKAHO PASS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
ONE INCH HAIL HAS BEEN REPORTED WITH THIS SEVERE THUNDERSTORM NEAR
CONNER. 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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTHEASTERN IDAHO AND NORTHWESTERN MONTANA.
&&
LAT...LON 4627 11375 4623 11377 4621 11382 4618 11379
4616 11380 4613 11377 4585 11409 4592 11433
4642 11409 4630 11378 4629 11378
TIME...MOT...LOC 2141Z 202DEG 35KT 4598 11416
$$
DICKERSON1 follow-up statement
302
WWUS55 KMSO 042216
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
416 PM MDT MON JUN 4 2012
MTC081-042230-
/O.CON.KMSO.SV.W.0004.000000T0000Z-120604T2230Z/
RAVALLI MT-
416 PM MDT MON JUN 4 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM MDT
FOR NORTHERN RAVALLI COUNTY...
* AT 408 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER.
THIS STORM WAS LOCATED 6 MILES EAST OF GRANTSDALE...OR ABOUT 7
MILES EAST OF HAMILTON...AND WAS MOVING NORTH AT 40 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
HAIL UP TO ONE INCH IN DIAMETER HAS BEEN REPORTED IN SOUTH OF CONNER
WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM MDT
TUESDAY MORNING FOR NORTHEASTERN IDAHO AND NORTHWESTERN MONTANA.
&&
LAT...LON 4627 11375 4623 11377 4621 11382 4618 11379
4616 11380 4613 11377 4585 11409 4592 11433
4642 11409 4630 11378 4629 11378
TIME...MOT...LOC 2216Z 202DEG 35KT 4630 11398
$$
DICKERSONThe office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 4, 9:09 AM MDT | Flood Watch | MSO | Deer Lodge, Flathead, Lake, Lincoln, Silver Bow | 61 hr |
| Jun 4, 2:45 PM MDT | Special Weather Statement | MSO | Ravalli | 30 min |
| Jun 4, 3:03 PM MDT | Special Weather Statement | MSO | Granite | 42 min |
| Jun 4, 3:08 PM MDT | Severe Thunderstorm Warning | MSO | Missoula, Ravalli | 37 min |
| Jun 4, 3:24 PM MDT | Special Weather Statement | MSO | Deer Lodge | 36 min |
| Jun 4, 3:46 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell, Ravalli | 44 min |
| Jun 4, 3:48 PM MDT | Severe Thunderstorm Warning | MSO | Deer Lodge, Granite, Powell | 27 min |
| Jun 4, 4:01 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 29 min |
| Jun 4, 4:14 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 31 min |
| Jun 4, 4:26 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Powell | 49 min |
| Jun 4, 4:31 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Missoula, Ravalli | 29 min |
| Jun 4, 4:31 PM MDT | Severe Thunderstorm Warning | MSO | Granite, Powell | 44 min |
| Jun 4, 5:53 PM MDT | Severe Thunderstorm Warning | MSO | Flathead, Missoula, Powell | 37 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.