Montana, 1999

High Wind in Montana, May 5, 1999

May 5, 1999 · NWS BYZ · 2 events in 2 counties and zones

An intense low pressure center over the Eastern Dakotas combined with high pressure over Western Montana to produce strong northwest winds across Eastern Montana. Broadus had gusts as high as 67 mph and Baker had sustained winds of 40 mph at 353 pm MDT.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS BYZ wrote it up.

An intense low pressure center over the Eastern Dakotas combined with high pressure over Western Montana to produce strong northwest winds across Eastern Montana. Broadus had gusts as high as 67 mph and Baker had sustained winds of 40 mph at 353 pm MDT.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

2 high wind. Local standard time, as filed.

High Wind, Fallon

When
May 5, 8:00 AM MST to 7:00 PM MST
Where
Fallon forecast zone
Measured
46 kt (53 mph)
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
46.334, -104.417 (the zone’s center; the record gives no point)

High Wind, Powder River

When
May 5, 8:00 AM MST to 7:00 PM MST
Where
Powder River forecast zone
Measured
58 kt (67 mph)
Reported by
TRAINED SPOTTER
Coordinates
45.395, -105.630 (the zone’s center; the record gives no point)

What these are

High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Montana in 1999Every state in 1999This day in weather historyWarnings in Montana, May 1999

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5694531, 5694532.