Numerous severe thunderstorms developed this afternoon across central Montana ahead of a vigorous upper level trough.  A few of these storms eventually grew into a squall line and affected parts of northeast Montana producing damaging straight line winds.

Thunderstorm Wind in PHILLIPS, MONTANA
From 04-JUL-08 19:00:00 to 04-JUL-08 19:00:00 (MST-7)
Location: SUN PRAIRIE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A roof was blown off a shed.

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 19:50:00 to 04-JUL-08 19:50:00 (MST-7)
Location: JORDAN AIRPORT (KJDN)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

This report was taken from the Jordan ASOS.

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 21:55:00 to 04-JUL-08 21:55:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in PETROLEUM, MONTANA
From 04-JUL-08 17:42:00 to 04-JUL-08 17:42:00 (MST-7)
Location: WINNETT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in PETROLEUM, MONTANA
From 04-JUL-08 17:47:00 to 04-JUL-08 17:47:00 (MST-7)
Location: WINNETT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PETROLEUM, MONTANA
From 04-JUL-08 18:00:00 to 04-JUL-08 18:00:00 (MST-7)
Location: WINNETT
Magnitude: 61.00 EG
Property damage: 0.20K
Crop damage: 0.00K
Reported by: Public

Eight inch diameter tree limbs were found snapped off and scattered on a nearby road.

Thunderstorm Wind in PETROLEUM, MONTANA
From 04-JUL-08 18:15:00 to 04-JUL-08 18:15:00 (MST-7)
Location: WINNETT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 18:45:00 to 04-JUL-08 18:45:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Pea size hail was also reported during the wind.

Thunderstorm Wind in PHILLIPS, MONTANA
From 04-JUL-08 18:50:00 to 04-JUL-08 18:50:00 (MST-7)
Location: SUN PRAIRIE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 19:00:00 to 04-JUL-08 19:00:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 19:00:00 to 04-JUL-08 19:00:00 (MST-7)
Location: SAND SPGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several one to two inch diameter tree branches were downed.

Thunderstorm Wind in PETROLEUM, MONTANA
From 04-JUL-08 18:10:00 to 04-JUL-08 18:10:00 (MST-7)
Location: WINNETT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hay bales were blown around on adjacent farmland.

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 18:40:00 to 04-JUL-08 18:40:00 (MST-7)
Location: SOUTH SAWMILL RAWS
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GARFIELD, MONTANA
From 04-JUL-08 20:30:00 to 04-JUL-08 20:30:00 (MST-7)
Location: (JDN)JORDAN
Magnitude: 50.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

Two to three inch diameter tree branches were snapped off.  A neighbor's tree was also uprooted.

Wildfire in CENTRAL AND SOUTHERN VALLEY, MONTANA
From 04-JUL-08 20:00:00 to 04-JUL-08 23:00:00 (MST-7)
Reported by: Law Enforcement

Strong synoptic winds blew through the region during the evening hours started just after 9 pm, delaying firework displays through most northeast Montana communities.  Several small wildfires were caused by the public using fireworks during the windy conditions.  Glasgow and Hinsdale both reported fires that evening.