Heavy Snow, Boise Mountains
- When
- December 9, 3:00 AM MST to 8:00 AM MST
- Where
- Boise Mountains forecast zone
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.602, -115.335 (the zone’s center; the record gives no point)
Heavy Snow in Idaho, December 9, 1999
A cold front moved through Southeast Oregon and Southwest Idaho during the early morning hours of December 9th, dropping up to 6 inches of snow in the West Central Mountains and 5 to 7 inches in the Boise Mountains.
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
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 BOI wrote it up.
A cold front moved through Southeast Oregon and Southwest Idaho during the early morning hours of December 9th, dropping up to 6 inches of snow in the West Central Mountains and 5 to 7 inches in the Boise Mountains.
The radar
The national radar mosaic for the moment the first event began.
Event by event
2 heavy snow. Local standard time, as filed.
Heavy Snow, West Central Mountains
- When
- December 9, 3:00 AM MST to 8:00 AM MST
- Where
- West Central Mountains forecast zone
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 44.543, -116.300 (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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado in Mississippi, December 9, 1999
- Damaging Wind in Mississippi, December 9, 1999
- Damaging Wind in Mississippi, December 9, 1999
- Hail and Damaging Wind in Tennessee, December 9, 1999
- Damaging Wind in Texas, December 9, 1999
- Hail and Damaging Winds in Mississippi, December 9, 1999
- Damaging Wind in Louisiana, December 9, 1999
- Dense Fog in Florida, December 9, 1999
- Winter Storm in California, December 9, 1999
- Heavy Snow in Idaho, December 9 to 10, 1999
- Heavy Snow in Montana, December 9 to 10, 1999
- Heavy Snow in California, December 9, 1999
More
Every storm in Idaho in 1999Every state in 1999This day in weather historyWarnings in Idaho, December 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 2026-10-01. Each event’s entry at NCEI: 5724664, 5724665.