Severe Thunderstorm Warning 58, NWS Glasgow, MT

352 
WWUS55 KGGW 070129
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
729 PM MDT Tue Jul 6 2021

MTC069-071-070200-
/O.CON.KGGW.SV.W.0058.000000T0000Z-210707T0200Z/
Phillips MT-Petroleum MT-
729 PM MDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR SOUTH CENTRAL PHILLIPS AND NORTHEASTERN PETROLEUM COUNTIES...

At 728 PM MDT, a severe thunderstorm was located 15 miles west of
Fourchette, or 21 miles southeast of Zortman, moving southeast at 25
mph.

HAZARD...70 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Fourchette, Crooked Creek Rec Area and U L Bend Rec Area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near the west end of Fort Peck Lake, get away from the 
water and move indoors or inside a vehicle. remember, lightning can 
strike out to 15 miles from the parent thunderstorm. If you can hear 
thunder, you are close enough to be struck by lightning. Move to 
safe shelter now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4762 10769 4754 10777 4755 10782 4751 10787
      4750 10785 4748 10787 4746 10786 4745 10792
      4743 10791 4737 10816 4758 10831 4773 10843
      4784 10818
TIME...MOT...LOC 0128Z 327DEG 21KT 4766 10827 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

Mottice

443 
WWUS55 KGGW 070145
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
745 PM MDT Tue Jul 6 2021

MTC069-071-070200-
/O.CON.KGGW.SV.W.0058.000000T0000Z-210707T0200Z/
Phillips MT-Petroleum MT-
745 PM MDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM MDT
FOR SOUTH CENTRAL PHILLIPS AND NORTHEASTERN PETROLEUM COUNTIES...

At 745 PM MDT, a severe thunderstorm was located 7 miles southwest of
Fourchette, or 26 miles southeast of Zortman, moving southeast at 30
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Fourchette, Crooked Creek Rec Area and U L Bend Rec Area. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

If on or near the west end of Fort Peck Lake, get away from the 
water and move indoors or inside a vehicle. remember, lightning can 
strike out to 15 miles from the parent thunderstorm. If you can hear 
thunder, you are close enough to be struck by lightning. Move to 
safe shelter now!  Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4762 10769 4754 10777 4755 10782 4751 10787
      4750 10785 4748 10787 4746 10786 4745 10792
      4743 10791 4740 10804 4768 10825 4778 10805
TIME...MOT...LOC 0145Z 299DEG 24KT 4767 10810 

HAIL...1.00IN
WIND...60MPH
 
$$

Mottice

365 
WWUS55 KGGW 070200
SVSGGW

Severe Weather Statement
National Weather Service Glasgow MT
800 PM MDT Tue Jul 6 2021

MTC069-071-070210-
/O.EXP.KGGW.SV.W.0058.000000T0000Z-210707T0200Z/
Phillips MT-Petroleum MT-
800 PM MDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL PHILLIPS AND
NORTHEASTERN PETROLEUM COUNTIES HAS EXPIRED...
                
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 has been allowed to expire.  However small
hail, gusty winds and heavy rain are still possible with this
thunderstorm.

LAT...LON 4762 10769 4754 10777 4755 10782 4751 10787
      4750 10785 4748 10787 4746 10786 4745 10792
      4743 10791 4740 10804 4768 10825 4778 10805
TIME...MOT...LOC 0200Z 327DEG 21KT 4760 10804 

$$

NWS Glasgow

Area Forecast Discussion
National Weather Service Glasgow MT
135 PM MDT Tue Jul 6 2021

.DISCUSSION...
Morning thunderstorms moved through portions of Phillips, northern
Petroleum, and Garfield Counties. These storms produced around a
half inch of rain for many locations in their path. These storms
have since died off and a clearly defined outflow/differential
heating boundary has been left behind. Locations south of the
boundary are denoted by upslope southeasterly winds and dewpoints
in the mid-50s. Areas north have easterly winds and dewpoints
around 60 degrees.

This boundary runs from northeastern Fergus County southeastward
through northern Petroleum and southern Garfield Counties. A CU
field has started to develop and thunderstorm development is
possible later this afternoon.

The latest RAP analysis suggests there is around 800-1000 J/Kg of
MLCAPE in the area as of 1 PM with 1500-2000 J/Kg of MLCAPE. This
combined with effective bulk shear around 40-45 knots suggests any
storm that is able to form has a good chance of becoming severe
with a large hail and damaging wind threat. The primary
limitation is the amount of forcing.

Additional storms will move in from the north this evening into
early tonight as they move off the Alberta Front Range. These are
less likely to be severe, however, a strong to severe storm still
cannot be ruled out.

Scattered thunderstorm chances will continue for the rest of the
week with additional severe storms possible on Wednesday (southern
Phillips, Petroleum, and Garfield Counties) and Thursday (far
Northeast Montana). Thunderstorm chances decrease as we head into
next weekend and early next week.

After near normal temperatures today, look for warmer
temperatures for Wednesday and Thursday with highs in the low to
mid 90s. Temperatures in the 70s and 80s are expected Friday with
a warmup expected as we head into the weekend. Widespread 80s are
likely Saturday with upper 80s to upper 90s on Sunday.

-Mottice

&&

.AVIATION...
CATEGORY: VFR-MVFR.

DISCUSSION: Low clouds will continue to break up near the
ND border through the evening hours. Scattered thunderstorms will
develop later this afternoon into this evening with strong winds
and hail possible, mainly southwest of KGGW. More general
thunderstorms are possible elsewhere through tonight. MVFR
conditions are possible in any thunderstorm.

WINDS: Easterly winds of 15 to 20 knots this afternoon will die
down overnight and become southeasterly around 10 knots through
Wednesday afternoon.

&&

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

&&

weather.gov/glasgow