Alert archive / Montana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 32, NWS Missoula, MT

June 26, 2012Flathead County, Missoula County, Powell County, Montana

NWS Missoula, MT issued this severe thunderstorm warning at Jun 26, 2012, 11:09 AM MDT for Flathead County, Missoula County, Powell County, Montana. It was in force for 35 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 26, 2012, 11:09 AM MDT (17:09 UTC)
Expired
Jun 26, 2012, 11:44 AM MDT
In force
35 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), 117 km from the middle of the area, began a volume at 17:09 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

TimeReportWhereRemark
Jun 26, 11:21 AM MDTHAIL 0.56 E Essex, MT1/2 INCH HAIL WITH HEAVY RAIN FOR 10 MINUTES.

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 12:00Z, 5.2 hours before the alert went out and 199 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.

Skew-T log-pSkew-T log-p diagram, Great_falls, MT at 12:00Z on 2012-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1099 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 12:00Z on 2012-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 223 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1099 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
763 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
223 m²/s²
0-3 km storm-relative helicity
481 m²/s²
Significant tornado parameter
0.0
Supercell composite
20.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

622 
WUUS55 KMSO 261709
SVRMSO
MTC029-063-077-261800-
/O.NEW.KMSO.SV.W.0032.120626T1709Z-120626T1800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MISSOULA MT
1109 AM MDT TUE JUN 26 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 NOON MDT.

* AT 1100 AM MDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED
  ALONG A LINE EXTENDING FROM 62 MILES SOUTH OF BLACKTAIL TO 10 MILES
  SOUTH OF ESSEX...OR ALONG A LINE EXTENDING FROM 44 MILES SOUTHEAST
  OF POLSON TO 31 MILES EAST OF EVERGREEN...AND WERE MOVING EAST AT
  35 MPH.

* LOCATIONS IMPACTED INCLUDE...BLACKTAIL...ESSEX AND PINNACLE.

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 4793 11293 4791 11308 4788 11305 4778 11305
      4773 11315 4749 11311 4748 11305 4742 11305
      4735 11340 4832 11387 4843 11335 4838 11332
      4834 11337 4825 11322 4818 11322 4813 11300
      4798 11287
TIME...MOT...LOC 1709Z 248DEG 33KT 4741 11323 4816 11351

$$
KITSMILLER
1 follow-up statement
141 
WWUS55 KMSO 261744
SVSMSO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
1144 AM MDT TUE JUN 26 2012

MTC029-063-077-261755-
/O.CAN.KMSO.SV.W.0032.000000T0000Z-120626T1800Z/
POWELL MT-MISSOULA MT-FLATHEAD MT-
1144 AM MDT TUE JUN 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FLATHEAD...
NORTHEASTERN MISSOULA AND NORTHWESTERN POWELL COUNTIES IS
CANCELLED...

LAT...LON 4793 11293 4791 11308 4788 11305 4778 11305
      4773 11315 4749 11311 4748 11305 4742 11305
      4735 11340 4832 11387 4843 11335 4838 11332
      4834 11337 4825 11322 4818 11322 4813 11300
      4798 11287
TIME...MOT...LOC 1745Z 248DEG 33KT 4753 11278 4828 11305

$$
KITSMILLER

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 2:16 AM MDTSpecial Weather StatementMSOMissoula44 min
Jun 26, 2:35 AM MDTRed Flag WarningMSOBeaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more21 hr
Jun 26, 2:54 AM MDTSpecial Weather StatementMSOFlathead36 min
Jun 26, 3:59 AM MDTSpecial Weather StatementMSOFlathead31 min
Jun 26, 4:24 AM MDTSpecial Weather StatementMSOFlathead36 min
Jun 26, 5:02 AM MDTSpecial Weather StatementMSOSanders28 min
Jun 26, 5:15 AM MDTSpecial Weather StatementMSOFlathead30 min
Jun 26, 5:41 AM MDTSevere Thunderstorm WarningMSOFlathead, Lake34 min
Jun 26, 6:00 AM MDTSevere Thunderstorm WarningMSOFlathead, Lake30 min
Jun 26, 6:25 AM MDTSevere Thunderstorm WarningMSOFlathead35 min
Jun 26, 6:38 AM MDTSevere Thunderstorm WarningMSOFlathead, Lincoln, Sanders52 min
Jun 26, 6:53 AM MDTSevere Thunderstorm WarningMSOFlathead37 min
Jun 26, 8:50 AM MDTLake Wind AdvisoryMSOFlathead, Lake, Sanders9 hr
Jun 26, 10:07 AM MDTAreal Flood AdvisoryMSOLake9 hr
Jun 26, 10:08 AM MDTSpecial Weather StatementMSOFlathead, Lake52 min
Jun 26, 10:11 AM MDTSpecial Weather StatementMSOGranite, Missoula49 min
Jun 26, 10:25 AM MDTSevere Thunderstorm WarningMSOFlathead, Lake, Missoula50 min
Jun 26, 11:11 AM MDTFlash Flood WarningMSOFlathead3 hr
Jun 26, 1:16 PM MDTAreal Flood WarningMSOFlathead24 hr

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.