Montana Department of Transportation

Main Content

Accidents and Incidents Report

Special Weather Statement

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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.
 
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WWUS85 KBYZ 201325

SPSBYZ



Special Weather Statement

National Weather Service Billings MT

725 AM MDT MON AUG 20 2018

 

MTZ035-057-201415-

Yellowstone MT-Northern Big Horn MT-

725 AM MDT MON AUG 20 2018



...SIGNIFICANT WEATHER ADVISORY...



At 724 AM MDT, Doppler radar was tracking a strong thunderstorm 14

miles southeast of Huntley, or 18 miles east of Billings, moving east

at 30 mph.



Dime size hail, winds in excess of 40 mph and brief heavy rain are 

possible with this storm.



Locations impacted include...

Crow Indian Reservation.



LAT...LON 4563 10818 4584 10820 4593 10769 4559 10764

TIME...MOT...LOC 1324Z 267DEG 24KT 4573 10812 



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TWH



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WWUS85 KMSO 202228

SPSMSO



Special Weather Statement

National Weather Service Missoula MT

428 PM MDT MON AUG 20 2018

 

IDZ009-010-MTZ005-006-202300-

Eastern Lemhi County ID-Western Lemhi County ID-

Bitterroot/Sapphire Mountains MT-Missoula/Bitterroot Valleys MT-

428 PM MDT MON AUG 20 2018



...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL LEMHI AND

SOUTHWESTERN RAVALLI COUNTIES UNTIL 500 PM MDT...



At 428 PM MDT, Doppler radar was tracking strong thunderstorms along

a line extending from 21 miles west of Darby to 16 miles northwest of

Gibbonsville to 11 miles southwest of Salmon. Movement was northeast

at 35 mph.



Pea size hail and winds in excess of 40 mph will be possible with

these storms.



Locations impacted include...

Salmon, Darby, North Fork, Conner, Gibbonsville, Sula, Lost Trail

Pass, Carmen, Leesburg and Como.



LAT...LON 4560 11424 4583 11449 4586 11437 4597 11438

      4603 11446 4610 11443 4613 11450 4616 11442

      4627 11438 4587 11392 4578 11387 4568 11394

      4562 11389 4560 11381 4552 11384 4552 11377

      4545 11378 4533 11374 4515 11358 4502 11412

TIME...MOT...LOC 2228Z 229DEG 29KT 4593 11460 4568 11421 4510 11410 



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WWUS85 KTFX 210259

SPSTFX



Special Weather Statement

National Weather Service Great Falls MT

859 PM MDT MON AUG 20 2018



MTZ008-015-055-210345-

Madison-Beaverhead-Gallatin-

859 PM MDT MON AUG 20 2018



...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN MADISON...

SOUTHEASTERN BEAVERHEAD AND SOUTH CENTRAL GALLATIN COUNTIES...



At 858 PM MDT, a strong thunderstorm was located 10 miles northwest

of Henrys Lake in Idaho, moving northeast at 35 mph.



Brief heavy rain and winds in excess of 35 mph are likely with this 

storms, and pea size hail is possible.



Locations impacted include...

West Yellowstone, Raynolds Pass and Yellowstone Village. 



Occasional cloud to ground lightning is occurring with this storm.

Lightning can strike 10 miles away from a thunderstorm. Seek a safe

shelter inside a building or vehicle.



LAT...LON 4457 11118 4458 11123 4462 11122 4473 11132

      4475 11138 4471 11141 4470 11149 4466 11147

      4460 11153 4461 11157 4483 11173 4512 11111

      4505 11115 4501 11110 4449 11111

TIME...MOT...LOC 0258Z 239DEG 30KT 4478 11149 



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Coulston



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