Severe Thunderstorm Warning 113, NWS Glasgow, MT

006 
WWUS55 KGGW 230330
SVSGGW

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
930 PM MDT FRI JUL 22 2016

MTC055-085-105-230340-
/O.CAN.KGGW.SV.W.0113.000000T0000Z-160723T0345Z/
VALLEY MT-MCCONE MT-ROOSEVELT MT-
930 PM MDT FRI JUL 22 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN VALLEY...
NORTHEASTERN MCCONE AND SOUTHWESTERN ROOSEVELT COUNTIES IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING HAS BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
NORTHEASTERN MONTANA.

LAT...LON 4767 10574 4768 10602 4834 10599 4835 10512
      4782 10533
TIME...MOT...LOC 0327Z 178DEG 31KT 4817 10591 

$$

RJM

Area Forecast Discussion...UPDATED
National Weather Service GLASGOW MT
742 PM MDT FRI JUL 22 2016

.SHORT TERM...for northeast Montana...tonight through Sun...
Quick update was to expand the Severe Thunderstorm Watch 410 to the
International border, chance weather type from probability to
coverage and spread pops more uniformly.

Templer

Previous Discussion...
Upper trough over the Pacific Northwest continues to move east and
drives a divergent SW upper flow over the area tonight.
Thunderstorms anticipated to be scattered in nature so severe
conditions are not expected to be widespread as atmosphere is
capped with 700 mb temps aoa 15C. However, an inverted surface
trough over central montana will move east and work with the
incoming upper trough to help focus thunderstorms into the
evening. with dewpoints in the 40s over the sw zones, damaging
winds may be more of a threat, then hail will be a greater threat
as storms move northeast into 50s and 60s dewpoint air.

Activity should quickly end from the southwest later tonight. The
upper low moves across southern Sask with showers mainly staying
north of the border. NW flow and minor upper troughing may bring in
an isolated shower to the area Saturday night. But the big impact
for this period will be the wind. Lake wind issues are expected.

Temperatures over the weekend will be noticeably cooler with 850
mb temps about 10*C lower. TFJ

.LONG TERM...Sun night through Fri...

Afternoon Update:
Most of the long range forecast remains intact as zonal flow with
increasing chances for PoPs and decreasing temperatures has been
well predicted. A slight change to add the latest wind data with
SuperBlend was updated but that was about it. GAH

Previous Long Term Discussion:
Sunday night begins with a broad, shallow ridge to the west and a
trough to the east. Flow aloft will be northwesterly. With the
ridge in place, conditions will be warm and dry. Models do show a
medium wave trough drifting inland near northern California and
southern Oregon.

By Monday afternoon or evening, the shallowing trough induces
winds aloft to turn to the southwest. In addition, hot desert air
pushes more north for a very warm day. Weak embedded impulses will
be enough to trigger isolated to scattered convection.

With the hot air-mass pushing the cool boundary into Canada, the
focus of storms moves north for Tuesday. Then Tuesday evening
another impulse in prairie provinces sends a weak front south to
cause a chance for storms through Wednesday. Then Thursday,
another trough moves in from the west for a chance of more storms.

Overall, near normal hot temperatures only need a disturbance to
set off storms through much of the period.

Templer

&&

.AVIATION...

SYNOPSIS: Mainly VFR. Mid level clouds are currently streaming
across the terminals. A ridge overhead lifted to the east late
this afternoon allowing thunderstorms to form after 00Z. These
storms could become severe.

SEVERE WX: SPC has placed all the terminals within the area for
slight to enhanced risk for severe thunderstorms this evening and
issued a Severe Thunderstorm Watch. Scattered storm cells between
00Z to 06Z will have a chance for damaging downburst winds and
large hail when they hit.

LLWS: Between 03-09Z a slight chance for low level wind shear
will occur as a fast mid level front slides over a surface
inversion.

WINDS: East to southeast between 10 to 20 kts through early this
evening, becoming west at 10 to 20 kts mid morning Saturday as a
front passes through.

GAH/SCT

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE.

&&

weather.gov/glasgow

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GLASGOW MT
352 PM MDT FRI JUL 22 2016

MTZ016>023-059>062-232200-
CENTRAL AND SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-
DANIELS-SHERIDAN-WESTERN ROOSEVELT-PETROLEUM-GARFIELD-MCCONE-
NORTHERN PHILLIPS-SOUTHWEST PHILLIPS-NORTHERN VALLEY-
EASTERN ROOSEVELT-
352 PM MDT FRI JUL 22 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A COLD FRONT IS EXPECTED TONIGHT. THERE WILL BE CHANCES FOR
THUNDERSTORMS TODAY AND TONIGHT. SOME STORMS MAY BECOME SEVERE
WITH LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MTZ024>027-232200-
RICHLAND-DAWSON-PRAIRIE-WIBAUX-
352 PM MDT FRI JUL 22 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST
MONTANA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A COLD FRONT IS EXPECTED TONIGHT. THERE WILL BE CHANCES FOR
THUNDERSTORMS TODAY AND TONIGHT. SOME STORMS MAY BECOME SEVERE
WITH LARGE HAIL AND DAMAGING WINDS AND A SEVERE THUNDERSTORM WATCH
HAS BEEN ISSUED FOR THE REGION UNTIL 1000 PM.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
637 PM MDT FRI JUL 22 2016

MTZ016-017-059-061-230130-
NORTHERN PHILLIPS MT-CENTRAL AND SOUTHERN VALLEY MT-
NORTHERN VALLEY MT-CENTRAL AND SOUTHEAST PHILLIPS MT-
637 PM MDT FRI JUL 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL VALLEY AND EAST
CENTRAL PHILLIPS COUNTIES UNTIL 730 PM MDT...

AT 637 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 13
MILES SOUTHEAST OF MALTA...MOVING NORTHEAST AT 40 MPH.

HALF INCH HAIL AND WIND GUSTS OF 50 TO 55 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SACO...HINSDALE...THE BENTONITE PLANT...
BOWDOIN AND SLEEPING BUFFALO.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
STATIONS AND AVAILABLE TELEVISION STATIONS FOR ADDITIONAL INFORMATION
AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4882 10738 4817 10674 4797 10785 4820 10798
TIME...MOT...LOC 0037Z 233DEG 33KT 4820 10771

GAH

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
705 PM MDT FRI JUL 22 2016

MTZ024-025-027-230145-
WIBAUX MT-DAWSON MT-RICHLAND MT-
705 PM MDT FRI JUL 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN RICHLAND...
SOUTHEASTERN DAWSON AND WIBAUX COUNTIES UNTIL 745 PM MDT...

AT 705 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
WIBAUX...MOVING NORTHEAST AT 55 MPH.

HALF INCH HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS
STORM.

LOCATIONS IMPACTED INCLUDE...
WIBAUX...SAVAGE...INTAKE...YATES...BURNS...HODGES AND SAINT PHILLIP.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
NORTHEASTERN MONTANA.

LAT...LON 4684 10460 4755 10461 4740 10405 4681 10405
TIME...MOT...LOC 0105Z 233DEG 49KT 4693 10429

GAH

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
728 PM MDT FRI JUL 22 2016

MTZ022-023-026-230230-
PRAIRIE MT-GARFIELD MT-MCCONE MT-
728 PM MDT FRI JUL 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MCCONE...
SOUTHEASTERN GARFIELD AND NORTHWESTERN PRAIRIE COUNTIES UNTIL 830 PM
MDT...

AT 728 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 12
MILES NORTHEAST OF COHAGEN...OR 27 MILES SOUTHEAST OF JORDAN...MOVING
NORTHEAST AT 45 MPH.

DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
FLOWING WELLS REST AREA...NELSON CREEK REC AREA...BROCKWAY...
HILLSIDE...COHAGEN...MCCLOUD...WELDON...VAN NORMAN...
CROW ROCK AND WATKINS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
STATIONS AND AVAILABLE TELEVISION STATIONS FOR ADDITIONAL INFORMATION
AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
NORTHEASTERN MONTANA.

LAT...LON 4683 10583 4686 10584 4686 10609 4685 10609
      4684 10657 4731 10670 4781 10584 4682 10533
TIME...MOT...LOC 0128Z 245DEG 38KT 4714 10639

RJM

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
736 PM MDT FRI JUL 22 2016

MTZ016-059-230230-
NORTHERN PHILLIPS MT-CENTRAL AND SOUTHEAST PHILLIPS MT-
736 PM MDT FRI JUL 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN PHILLIPS COUNTY
UNTIL 830 PM MDT...

AT 736 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 15
MILES SOUTHEAST OF TURNER...OR 26 MILES NORTHWEST OF MALTA...MOVING
NORTHEAST AT 60 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
WHITEWATER...DODSON...LORING...PORT OF MORGAN AND CHAPMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO
STATIONS AND AVAILABLE TELEVISION STATIONS FOR ADDITIONAL INFORMATION
AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4900 10722 4865 10723 4833 10841 4845 10841
      4843 10836 4844 10834 4874 10832 4875 10826
      4900 10824
TIME...MOT...LOC 0136Z 229DEG 54KT 4865 10824

RJM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
752 PM MDT FRI JUL 22 2016

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

0745 PM     TSTM WND GST     11 SE VAN NORMAN        47.24N 106.22W
07/22/2016  E50 MPH          GARFIELD           MT   TRAINED SPOTTER

&&

PROTON

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GLASGOW MT
809 PM MDT FRI JUL 22 2016

MTZ024-230300-
RICHLAND MT-
809 PM MDT FRI JUL 22 2016

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL RICHLAND COUNTY
UNTIL 900 PM MDT...

AT 809 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7
MILES SOUTH OF SIDNEY...MOVING NORTHEAST AT 50 MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
SIDNEY...FAIRVIEW...CRANE AND WOOLEY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM MDT FOR
NORTHEASTERN MONTANA.

LAT...LON 4745 10411 4767 10440 4799 10405 4749 10404
TIME...MOT...LOC 0209Z 227DEG 46KT 4762 10410

RJM