Heavy Snow, Owyhee Mountains
- When
- March 31, 8:00 AM MST to 4:00 PM MST
- Where
- Owyhee Mountains forecast zone
- Reported by
- TRAINED SPOTTER
- Coordinates
- 42.582, -116.170 (the zone’s center; the record gives no point)
Winter Storm and Heavy Snow in Idaho, March 31, 1999
A pacific storm system moved over south west Idaho and produced heavy snow in the Owyhee Mountains where Silver City reported 5 to 6 inches of new snow. In the Treasure Valley the storm produced 2 to 3 inches of snow with an isolated report of 5 inches at the Boise National Weather Service office.
Where it happened
Every event with a place to put it; 3 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
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 3
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 BOI wrote it up.
A pacific storm system moved over south west Idaho and produced heavy snow in the Owyhee Mountains where Silver City reported 5 to 6 inches of new snow. In the Treasure Valley the storm produced 2 to 3 inches of snow with an isolated report of 5 inches at the Boise National Weather Service office.
The radar
The national radar mosaic for the moment the first event began.
Event by event
2 winter storm, 1 heavy snow. Local standard time, as filed.
Winter Storm, Lower Treasure Valley
- When
- March 31, 8:00 AM MST to 12:00 PM MST
- Where
- Lower Treasure Valley forecast zone
- Reported by
- TRAINED SPOTTER
- Coordinates
- 43.746, -116.564 (the zone’s center; the record gives no point)
Winter Storm, Upper Treasure Valley
- When
- March 31, 8:00 AM MST to 12:00 PM MST
- Where
- Upper Treasure Valley forecast zone
- Reported by
- PARK/FOREST SERVICE
- Coordinates
- 43.129, -115.960 (the zone’s center; the record gives no point)
What these are
- Heavy Snow
- Snowfall reaching the local warning threshold without the other hazards of a winter storm.
- Winter Storm
- A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- High Wind in Arizona, March 31, 1999
- High Wind in Arizona, March 31, 1999
- Heavy Snow in Wyoming, March 31, 1999
- Hail in North Dakota, March 31, 1999
- Heavy Snow in California, March 31, 1999
- High Wind in California, March 31, 1999
- High Wind in Colorado, March 31, 1999
- High Wind in Arizona, March 31, 1999
- High Wind in California, March 31, 1999
- High Wind in Arizona, March 31, 1999
- High Wind in Colorado, March 31, 1999
- High Wind in California, March 31, 1999
More
Every storm in Idaho in 1999Every state in 1999This day in weather historyWarnings in Idaho, March 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 2026-09-30. Each event’s entry at NCEI: 5691739, 5691740, 5691741.