Severe Thunderstorm Warning 28, NWS Glasgow, MT

013 
WWUS55 KGGW 100316
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
916 PM MDT Wed Jun 9 2021

MTC071-105-100345-
/O.CON.KGGW.SV.W.0028.000000T0000Z-210610T0345Z/
Phillips MT-Valley MT-
916 PM MDT Wed Jun 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM MDT
FOR EAST CENTRAL PHILLIPS AND WEST CENTRAL VALLEY COUNTIES...

At 915 PM MDT, a severe thunderstorm was located 20 miles north of
Fourchette, or 23 miles south of Malta, moving northeast at 15 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Content.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

This thunderstorm is capable of producing all types of severe weather
including extremely large hail, destructive straight line winds and
tornadoes. Move quickly to a safe shelter, such as an interior room,
a bathroom or closet or basement.

&&

LAT...LON 4793 10789 4809 10802 4820 10729 4789 10722
TIME...MOT...LOC 0315Z 246DEG 14KT 4802 10782 

HAIL...1.25IN
WIND...60MPH
 
$$

NWS Glasgow
TFJ

918 
WWUS55 KGGW 100343
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
943 PM MDT Wed Jun 9 2021

MTC071-105-100353-
/O.EXP.KGGW.SV.W.0028.000000T0000Z-210610T0345Z/
Phillips MT-Valley MT-
943 PM MDT Wed Jun 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PHILLIPS AND WEST
CENTRAL VALLEY COUNTIES WILL EXPIRE AT 945 PM MDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

A Severe Thunderstorm Watch remains in effect until midnight MDT for
northeastern Montana.

LAT...LON 4793 10789 4809 10802 4820 10729 4789 10722
TIME...MOT...LOC 0343Z 260DEG 23KT 4805 10757 

$$

NWS Glasgow
TFJ

Area Forecast Discussion
National Weather Service Glasgow MT
345 PM MDT Wed Jun 9 2021

.DISCUSSION...
Today is the lull between storms, with severe potential once again
Thursday with all modes of severe possible. In addition, locally
heavy rainfall is once again possible Thursday afternoon and
evening. In addition, there's a chance for some severe storms
tonight in the far northern and western portions of the CWA.

Tonight...
Showers and thunderstorms should enter the CWA late this evening
and overnight tonight, with some gusty winds and small hail
possible with any storms that do develop. In addition, the
environmental winds will begin to pick up area-wide, which will be
enough to reach Lake Wind Advisory criteria over Fort Peck Lake.
Some lingering showers and thunder is possible in the northeast
(Daniels and Sheridan Counties) from whatever's left over from
the overnight convection.

Thursday through Friday....
CAMs guidance in fairly good agreement in developing storms
tomorrow afternoon over the eastern half of the CWA in the
ballpark of 3 PM MDT. In addition, storms will be developing over
Central Montana as well, so there will be a dry slot in between
the two areas of convection. The eastern line will move into North
Dakota during the evening while the convection in Central Montana
spreads across the area. WPC has outlooked roughly the eastern
half of the CWA for a marginal risk of excessive rainfall, with a
slight risk roughly east of a Scobey to Wibaux line: this seems
reasonable given the doubleshot of storms this part of the area
should get, and a Flash Flood Watch may be needed in later
forecast packages. SPC has the eastern half of the CWA under an
enhanced risk, with a hatched area for winds and hail (with the
hatched hail area for almost all of the area):
this also is reasonable given the convective parameters that are
setting up. After the storms move out, the gusty environmental
winds will continue into Friday and temperatures will be much
cooler than it was today or what it will be on Thursday.

Saturday and beyond...
Upper level ridging will begin to build in, leading to rising
temperatures through the weekend into early next week. The peak of
the heat currently appears to be Monday and Tuesday. Dry weather
will return as well.

97

&&

.AVIATION...
FLIGHT CONDITIONS: MVFR ceilings possible early this afternoon at
KGGW & KOLF, with VFR at KGDV & KSDY. Periods of MVFR ceilings
are possible again Thursday morning at KGGW, KOLF, & KSDY.

LLWS: Possible overnight tonight just before sunrise at KOLF,
KSDY, and KGDV about 2kft AGL between 30-40 kts from the
southeast.

WINDS: Becoming NE-E 5-15 kts this afternoon. E 15-20 kts
overnight tonight. SE-E 15-25 kts by Thursday afternoon.

SYNOPSIS: Low clouds have been lingering over the area this
morning, impacting KGGW and KOLF. Showers and thunderstorms will
begin to move into the region and and impact the TAF sites in the
afternoon and evening. Another round of severe weather, including
thunderstorm winds and hail, are possible Thursday afternoon and
evening.

97

&&

.FIRE WEATHER...
Before the storms fire up Thursday afternoon and evening, low
humidity values and gusty winds are expected in the southern fire
zones. For Zone 122, the main threat appear to be south of I-94
while areas north of I-94 should have higher relative humidity
values and have less of a fire threat. If any fires do get
started Thursday afternoon, rain from the storms Thursday night
should bring quick rains to these areas.

There could be brief periods of elevated to critical fire weather
conditions on Friday in pockets generally south of the Missouri
River, but questions surrounding how the precipitation between now
and then impacts soil and fuel moistures leave doubt as to whether
or not fire weather conditions will be reached.

97

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
Fire Weather Watch from Thursday morning through Thursday
evening for MTZ122-137.

Lake Wind Advisory from 3 AM Thursday to 7 PM MDT Friday For
Fort Peck Lake for Central and Southeast Phillips...Central and
Southern Valley...Garfield...McCone...Petroleum.

&&

weather.gov/glasgow

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
722 PM MDT WED JUN 9 2021

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

0715 PM     HAIL             7 W LANDUSKY            47.89N 108.77W
06/09/2021  E1.00 INCH       PHILLIPS           MT   TRAINED SPOTTER

            ALSO WIND GUST TO 62 MPH WITH BRIEF HEAVY
            RAIN.

&&

TFJ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
739 PM MDT WED JUN 9 2021

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

0800 PM     HEAVY RAIN       2 N SACO                48.48N 107.33W
06/08/2021  M0.90 INCH       PHILLIPS           MT   TRAINED SPOTTER

            TOTAL RAINFALL OF 0.9 INCHES REPORTED WITH
            PEA SIZE HAIL AND ESTIMATED WIND GUSTS OF 40
            MPH.

&&

JEZ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
812 PM MDT WED JUN 9 2021

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

0740 PM     HAIL             ZORTMAN                 47.92N 108.53W
06/09/2021  E3.00 INCH       PHILLIPS           MT   PUBLIC

            PUBLIC REPORT OF HAIL 2 TO 3 INCHES,
            POSSIBLY LARGER. SOME PEOPLE AT NEARBY
            CAMPGROUND ALSO SUSTAINED DAMAGE. BUSTED
            WINDSHIELDS AND DENTED VEHICLES. NOT VERY
            WINDY, A LOT OF RAIN. TIME ESTIMATED.

&&

RUX

Special Weather Statement
National Weather Service Glasgow MT
830 PM MDT Wed Jun 9 2021

MTZ016-060-100315-
Southwest Phillips MT-Central and Southeast Phillips MT-
830 PM MDT Wed Jun 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PHILLIPS COUNTY
UNTIL 915 PM MDT...

At 829 PM MDT, Doppler radar was tracking a strong thunderstorm 21
miles east of Winifred, or 26 miles southwest of Zortman, moving
northeast at 50 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Zortman, Landusky and Fred Robinson Bridge.

A Severe Thunderstorm Watch remains in effect until midnight MDT for
northeastern Montana.

LAT...LON 4792 10889 4792 10863 4799 10861 4798 10855
      4798 10844 4818 10843 4806 10814 4762 10860
      4762 10867 4763 10868 4763 10870 4765 10873
      4764 10877 4766 10879 4768 10878 4771 10883
      4773 10889
TIME...MOT...LOC 0229Z 213DEG 43KT 4766 10894

NWS Glasgow
TFJ

Special Weather Statement
National Weather Service Glasgow MT
833 PM MDT Wed Jun 9 2021

MTZ016-021-060-100315-
Petroleum MT-Southwest Phillips MT-Central and Southeast Phillips MT-
833 PM MDT Wed Jun 9 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN PHILLIPS AND
NORTHWESTERN PETROLEUM COUNTIES UNTIL 915 PM MDT...

At 833 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles south of Roy, or 27 miles northeast of Lewistown, moving
northeast at 50 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Fred Robinson Bridge.

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 midnight MDT for
northeastern Montana.

LAT...LON 4719 10872 4727 10872 4727 10859 4730 10859
      4731 10852 4743 10832 4759 10832 4757 10834
      4759 10839 4758 10842 4762 10844 4760 10848
      4760 10851 4762 10852 4761 10858 4763 10871
      4781 10856 4757 10808 4717 10874 4718 10874
TIME...MOT...LOC 0233Z 213DEG 43KT 4722 10890

NWS Glasgow
TFJ

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GLASGOW MT
839 PM MDT WED JUN 9 2021

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

0730 PM     HAIL             8 SW PHILLIPS           48.02N 108.29W
06/09/2021  M2.00 INCH       PHILLIPS           MT   PUBLIC

            TWITTER PHOTO OF HAILSTONES WITH
            MEASUREMENT. TIME ESTIMATED.

&&

JEZ