Alert archive / Montana / Special Weather Statements in 2012

Special Weather Statement, NWS Missoula, MT

June 26, 2012Flathead County, Montana

NWS Missoula, MT issued this special weather statement at Jun 26, 2012, 4:24 AM MDT for Flathead County, Montana. It was in force for 36 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 26, 2012, 4:24 AM MDT (10:24 UTC)
Expired: Jun 26, 2012, 5:00 AM MDT
In force: 36 min
Issued by: NWS Missoula, MT

County Flathead County, MT

The radar

The Missoula radar (KMSX), 134 km from the middle of the area, began a volume at 10:24 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 nearest sounding before it

Spokane, WA (KOTX), launched 00:00Z, 10.4 hours before the alert went out and 172 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2072 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Missoula, MT wrote its last area forecast discussion before this special weather statement went out at Jun 26, 2:31 AM MDT, 1 hour 53 minutes earlier.

Area forecast discussion, Jun 26, 2:31 AM MDT, 1 hour 53 minutes before

Area Forecast Discussion
National Weather Service Missoula MT
231 AM MDT Tue Jun 26 2012

.DISCUSSION...A strong upper level low pressure system will move
through western Montana and north central Idaho today. Listed below
are the main impacts expected with this system.

Rain: Periods of heavy rain are expected, starting this morning
and lasting through the afternoon. Northwest Montana will see the
highest rainfall amounts with widespread 1-2 inches possible by
tonight. This will cause water to rise on area streams and rivers
across northwest Montana and may cause ponding of water in urban
areas as well as rock and debris flows. A flood watch remains in
effect for Lincoln and Flathead counties.

Thunderstorms: Thunderstorms are expected to develop this morning,
generally along and north of the Interstate 90 corridor. Some of
these storms could become quite strong, producing heavy rain,
gusty winds and hail. The strongest storms are expected this
morning and will likely actually weaken after noon.

Winds: Winds will increase late this morning as a cold front moves
through the region. The strongest winds will occur across
southwest Montana through Lemhi county in Idaho where southwest
winds of 20 to 30 mph with gusts to 45 mph are possible. Northwest
Montana and north central Idaho will also be breezy although winds
in these areas are expected to be lighter. Choppy conditions will
develop on area lakes.

Fire danger: Fire danger will be high once again across southwest
Montana this afternoon due to the expected winds and low relative
humidity. Any new fire starts will have the potential to grow
rapidly. A red flag warning has been issued for southwest Montana.

The upper level low will gradually exit the region tonight with a
ridge of high pressure building in its wake. Temperatures will
warm to back above normal with sunshine.

Friday and Saturday...Upper level ridge will be in place allowing
temperatures to be near normal. The chance for precipitation will
be below normal on Friday and near normal on Saturday. Confidence
is good.

Sunday...An upper level low will bring a chance for showers and
thunderstorms with the chance for precipitation being above
normal. Temperatures will be near normal, but have the potential
to be warmer than forecast especially if there are less clouds
ahead of this system. With southwest flow and the approaching
system, some of the thunderstorms could be strong.

Monday and beyond...Both temperatures and the chance for
precipitation will be near normal.

&&

.AVIATION...A vigorous weather system will pass through the region
today. Showers and thunderstorms have already this morning
generally along and north of the Interstate 90 corridor. These
storms are expected to intensify between 26/1200z and 26/1800z and
could cause local heavy rain, gusty winds, and hail. Airfields
KMSO and KGPI will be the most likely to experience thunderstorms.
Widespread rain will develop along with the thunderstorms later
this morning across all of northwest Montana and north central
Idaho. Widespread obscuration of the higher terrain is expected.
Southwest to west winds will strengthen area wide late this
morning. The strongest winds are expected across southwest Montana
and in Lemhi County in Idaho, where gusts to 40 kts are possible.
KBTM and KSMN are the most likely terminals to experience these
winds...likely between 26/1800z and 27/0200z. Pallister

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...RED FLAG WARNING from Noon today to 9 PM MDT this evening
     Bitterroot/Sapphire Mountains...Butte/Blackfoot Region.

ID...None.
&&

Pallister/Noble

In the hours before

Special weather statement, Jun 26, 2:16 AM MDT, 2 hours 8 minutes before

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Special weather statement, Jun 26, 2:54 AM MDT, 1 hour 30 minutes before

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Special weather statement, Jun 26, 3:59 AM MDT, 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
359 AM MDT TUE JUN 26 2012

MTZ001>003-261030-
FLATHEAD/MISSION VALLEYS-KOOTENAI/CABINET REGION-WEST GLACIER/BOB
MARSHALL REGION-
359 AM MDT TUE JUN 26 2012

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FLATHEAD AND NORTHERN
LAKE COUNTIES UNTIL 430 AM MDT...

AT 358 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR WOODS BAY...OR 16 MILES SOUTHEAST OF
KALISPELL...MOVING NORTH AT 50 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BIGFORK...COLUMBIA
FALLS...SOMERS...CRESTON...HUNGRY HORSE...MARTIN CITY...CORAM AND
NYACK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY
AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL
PROTECTED AREA.

&&

LAT...LON 4853 11417 4846 11370 4789 11402 4792 11428
TIME...MOT...LOC 0959Z 191DEG 50KT 4801 11412

Local storm report, Jun 26, 4:22 AM MDT, 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MISSOULA MT
422 AM MDT TUE JUN 26 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0421 AM     HAIL             5 N BIGFORK             48.14N 114.09W
06/26/2012  M0.50 INCH       FLATHEAD           MT   TRAINED SPOTTER

&&

NOBLE

Special weather statement, Jun 26, 4:24 AM MDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MISSOULA MT
424 AM MDT TUE JUN 26 2012

MTZ001>003-261100-
FLATHEAD/MISSION VALLEYS-KOOTENAI/CABINET REGION-WEST GLACIER/BOB
MARSHALL REGION-
424 AM MDT TUE JUN 26 2012

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FLATHEAD AND NORTHERN
LAKE COUNTIES UNTIL 500 AM MDT...

AT 416 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 7 MILES NORTH OF BIG ARM...OR 16 MILES NORTHWEST
OF POLSON...MOVING NORTH AT 50 MPH.

HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...KALISPELL...
EVERGREEN...BIGFORK...COLUMBIA FALLS...WHITEFISH...LAKESIDE...
SOMERS...CRESTON...LA SALLE...HUNGRY HORSE...MARTIN CITY AND CORAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF THREATENING WEATHER APPROACHES YOUR AREA...GO INDOORS AND STAY
AWAY FROM WINDOWS. IF YOU ARE CAUGHT OUTSIDE...MOVE TO A WELL
PROTECTED AREA.

&&

LAT...LON 4850 11436 4839 11383 4787 11419 4791 11445
TIME...MOT...LOC 1023Z 193DEG 45KT 4798 11429

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 26, 2:16 AM MDT	Special Weather Statement	MSO	Missoula	44 min
Jun 26, 2:35 AM MDT	Red Flag Warning	MSO	Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more	21 hr
Jun 26, 2:54 AM MDT	Special Weather Statement	MSO	Flathead	36 min
Jun 26, 3:59 AM MDT	Special Weather Statement	MSO	Flathead	31 min
Jun 26, 5:02 AM MDT	Special Weather Statement	MSO	Sanders	28 min
Jun 26, 5:15 AM MDT	Special Weather Statement	MSO	Flathead	30 min
Jun 26, 5:41 AM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake	34 min
Jun 26, 6:00 AM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake	30 min
Jun 26, 6:25 AM MDT	Severe Thunderstorm Warning	MSO	Flathead	35 min
Jun 26, 6:38 AM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lincoln, Sanders	52 min
Jun 26, 6:53 AM MDT	Severe Thunderstorm Warning	MSO	Flathead	37 min
Jun 26, 8:50 AM MDT	Lake Wind Advisory	MSO	Flathead, Lake, Sanders	9 hr
Jun 26, 10:07 AM MDT	Areal Flood Advisory	MSO	Lake	9 hr
Jun 26, 10:08 AM MDT	Special Weather Statement	MSO	Flathead, Lake	52 min
Jun 26, 10:11 AM MDT	Special Weather Statement	MSO	Granite, Missoula	49 min
Jun 26, 10:25 AM MDT	Severe Thunderstorm Warning	MSO	Flathead, Lake, Missoula	50 min
Jun 26, 11:09 AM MDT	Severe Thunderstorm Warning	MSO	Flathead, Missoula, Powell	35 min
Jun 26, 11:11 AM MDT	Flash Flood Warning	MSO	Flathead	3 hr
Jun 26, 1:16 PM MDT	Areal Flood Warning	MSO	Flathead	24 hr

Nearby

Special Weather Statements in Montana, 2012 Every special weather statement 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.