Alert archive / Montana / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 3, NWS Missoula, MT
NWS Missoula, MT issued this severe thunderstorm warning at Jun 23, 2011, 1:34 PM MDT for Missoula County, Powell County, Montana. It was in force for 26 min. 3 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, 2011, 1:34 PM MDT (19:34 UTC)
- Expired
- Jun 23, 2011, 2:00 PM MDT
- In force
- 26 min
- Issued by
- NWS Missoula, MT
- Area
- Storm-based polygon
Counties Missoula County, MT, Powell County, MT
The radar
The Missoula radar (KMSX), 68 km from the middle of the area, began a volume at 19:34 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, 1:45 PM MDT | HAIL 1.25 | 8 Sse Seeley Lake, MT | HAIL REPORTED AT BIG SKY LAKE. |
| Jun 23, 1:50 PM MDT | HAIL 1 | 7 Sse Seeley Lake, MT | PUBLIC REPORT FROM SALMON LAKE AREA |
| Jun 23, 1:50 PM MDT | HAIL 1.25 | 8 Sse Seeley Lake, MT | HAIL REPORTED AT BIG SKY LAKE. |
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 |
|---|---|---|---|
| Jun 23, 12:55 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 7.6 hours before the alert went out and 192 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
- 4 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 2315 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- -13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
370
WUUS55 KMSO 231934
SVRMSO
MTC063-077-232000-
/O.NEW.KMSO.SV.W.0003.110623T1934Z-110623T2000Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
134 PM MDT THU JUN 23 2011
THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN MISSOULA COUNTY IN WEST CENTRAL MONTANA...
NORTHERN POWELL COUNTY IN WEST CENTRAL MONTANA...
* UNTIL 200 PM MDT.
* AT 129 PM MDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER. THIS STORM
WAS LOCATED 6 MILES SOUTHEAST OF SEELEY LAKE...OR ABOUT 31 MILES
NORTHEAST OF MISSOULA...AND WAS MOVING EAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...CLEARWATER...SEELEY LAKE AND
WOODWORTH.
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.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT
THURSDAY EVENING FOR NORTHWESTERN MONTANA.
&&
LAT...LON 4707 11279 4697 11360 4716 11369 4750 11307
4718 11304 4718 11279
TIME...MOT...LOC 1935Z 252DEG 37KT 4712 11334
$$
ZUMPFE2 follow-up statements
850
WWUS55 KMSO 231950
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
150 PM MDT THU JUN 23 2011
MTC063-077-232000-
/O.CON.KMSO.SV.W.0003.000000T0000Z-110623T2000Z/
POWELL MT-MISSOULA MT-
150 PM MDT THU JUN 23 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM MDT
FOR EASTERN MISSOULA AND NORTHERN POWELL COUNTIES...
* AT 143 PM MDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO ONE INCH IN DIAMETER.
THIS STORM WAS LOCATED NEAR WOODWORTH...OR ABOUT 33 MILES NORTH OF
DRUMMOND...AND WAS MOVING EAST AT 35 MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT
THURSDAY EVENING FOR NORTHWESTERN MONTANA.
&&
LAT...LON 4707 11279 4697 11360 4716 11369 4750 11307
4718 11304 4718 11279
TIME...MOT...LOC 1950Z 252DEG 32KT 4714 11323
$$
ZUMPFE659
WWUS55 KMSO 231958
SVSMSO
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
158 PM MDT THU JUN 23 2011
MTC063-077-232009-
/O.EXP.KMSO.SV.W.0003.000000T0000Z-110623T2000Z/
POWELL MT-MISSOULA MT-
158 PM MDT THU JUN 23 2011
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MISSOULA AND NORTHERN
POWELL COUNTIES EXPIRES AT 200 PM MDT...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT
THURSDAY EVENING FOR NORTHWESTERN MONTANA.
LAT...LON 4707 11279 4697 11360 4716 11369 4750 11307
4718 11304 4718 11279
TIME...MOT...LOC 1959Z 252DEG 32KT 4716 11312
$$
ZUMPFEThe office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 1:51 AM MDT | Special Weather Statement | MSO | Flathead | 39 min |
| Jun 23, 11:17 AM MDT | Areal Flood Warning | MSO | Deer Lodge | 14 days |
| Jun 23, 11:49 AM MDT | Areal Flood Warning | MSO | Missoula | 68 hr |
| Jun 23, 12:19 PM MDT | Special Weather Statement | MSO | Flathead | 41 min |
| Jun 23, 12:29 PM MDT | Severe Thunderstorm Warning | MSO | Flathead | 34 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2011Every severe thunderstorm warning in 2011
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.