Special Weather Statement
***********************************************************************
Note: Be sure to pay close attention to the date and time of each warning.
This document contains all warnings in the state so please read the
complete document.
***********************************************************************
WWUS85 KBYZ 130120
SPSBYZ
Special Weather Statement
National Weather Service Billings MT
720 PM MDT Fri Jun 12 2026
MTZ141-172-130145-
Northern Sweet Grass MT-Melville Foothills MT-
720 PM MDT Fri Jun 12 2026
...A THUNDERSTORM OUTFLOW WILL IMPACT SOUTH CENTRAL WHEATLAND AND
NORTHERN SWEET GRASS COUNTIES UNTIL 745 PM MDT...
At 720 PM MDT, Doppler radar was tracking a thunderstorm outflow.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Big Timber, Melville and Greycliff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Strong crosswinds will impact portions of US 191 and I 90.
&&
LAT...LON 4597 11014 4599 11017 4609 11012 4621 11021
4622 11020 4622 10966 4605 10960 4604 10942
4596 10943 4596 10951 4587 10951 4587 10955
4569 10956 4565 10964 4577 10999 4580 10998
4574 11022 4578 11022 4579 11029 4589 11029
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
--------------------------------
Archer
****************************
****************************
WWUS85 KGGW 130056
SPSGGW
Special Weather Statement
National Weather Service Glasgow MT
656 PM MDT Fri Jun 12 2026
MTZ016-021-022-060-130200-
Petroleum MT-Garfield MT-Southwest Phillips MT-
Central and Southeast Phillips MT-
656 PM MDT Fri Jun 12 2026
...A strong thunderstorm will impact portions of southwestern
Phillips, Petroleum and southwestern Garfield Counties through 800 PM
MDT
...
At 655 PM MDT, Doppler radar was tracking a strong thunderstorm 15
miles east of Roy, or 21 miles northwest of Winnett, moving east at
40 mph.
HAZARD...Wind gusts up to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Winnett, Flatwillow, Sand Springs, U L Bend Rec Area, Mosby, Crooked
Creek Rec Area, Petrolia Lake, Fred Robinson Bridge, Cat Creek, and
Tiegen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4768 10876 4771 10775 4686 10714 4685 10789
4676 10783 4675 10863 4710 10861 4710 10874
4727 10872 4732 10831 4758 10831 4758 10842
4762 10844 4760 10848 4762 10852 4762 10867
TIME...MOT...LOC 0055Z 261DEG 33KT 4725 10865
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
--------------------------------
Maliawco
****************************
****************************
WWUS85 KMSO 130135
SPSMSO
Special Weather Statement
National Weather Service Missoula MT
735 PM MDT Fri Jun 12 2026
IDZ005-006-MTZ004.007-043-130215-
Lower Clark Fork Region MT-Bitterroot/Sapphire Mountains MT-
Southern Clearwater Mountains ID-Northern Clearwater Mountains ID-
Butte/Blackfoot Region MT-Potomac/Seeley Lake Region MT-
Missoula/Bitterroot Valleys MT-
735 PM MDT Fri Jun 12 2026 /635 PM PDT Fri Jun 12 2026/
...A LINE OF SHOWERS WILL IMPACT NORTHEASTERN IDAHO...EASTERN
CLEARWATER...SOUTHEASTERN MINERAL...SOUTHWESTERN MISSOULA...NORTHERN
RAVALLI AND NORTHERN GRANITE COUNTIES UNTIL 815 PM MDT /715 PM
PDT/...
At 735 PM MDT /635 PM PDT/, Doppler radar was tracking a cold front
extending from 13 miles southwest of Drummond to 16 miles south of
Tarkio, or extending from 13 miles southwest of Drummond to 30 miles
south of Superior, moving south at 25 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lolo, Stevensville, Philipsburg, Florence, Victor, Woodside,
Pinesdale, Bell Crossing, Corvallis, Quigley, Skalkaho Pass, Lolo
Hot Springs, Lolo Pass, Nimrod and Powell.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4695 11484 4677 11397 4673 11343 4632 11322
4621 11380 4644 11473
TIME...MOT...LOC 0133Z 347DEG 21KT 4659 11341 4652 11395 4679 11468
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
--------------------------------
****************************
****************************
WWUS85 KTFX 130010
SPSTFX
Special Weather Statement
National Weather Service Great Falls MT
610 PM MDT Fri Jun 12 2026
MTZ317-320-321-130100-
Little Belt and Highwood Mountains MT-
Big Belt, Bridger and Castle Mountains MT-Meagher County Valleys MT-
610 PM MDT Fri Jun 12 2026
...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN LEWIS AND CLARK...
NORTHWESTERN MEAGHER AND SOUTHWESTERN CASCADE COUNTIES THROUGH 700 PM
MDT...
At 609 PM MDT, Doppler radar was tracking a strong thunderstorm 25
miles east of Wolf Creek, or 25 miles south of Cascade, moving
southeast at 30 mph.
HAZARD...Wind gusts up to 50 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Fort Logan On The Smith River.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4699 11161 4701 11155 4687 11094 4663 11110
4686 11170
TIME...MOT...LOC 0009Z 293DEG 24KT 4691 11154
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
--------------------------------
Ludwig
****************************
****************************