Flood, Ada
- When
- September 6, 4:30 PM MST to 5:45 PM MST
- Where
- Ada County, Boise
- Reported by
- TRAINED SPOTTER
- Coordinates
- 43.451, -116.241 (the zone’s center; the record gives no point)
Flooding and Damaging Wind in Idaho, September 6, 1998
During the evening of September 6th scattered thunderstorms moved through the Treasure Valley and Boise Mountains with heavy rain and isolated wet microbursts. In and around Boise numerous reports of street flooding were received while in Boise County a number of small mud slides covered the road between Garden Valley and Lowman.
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
- $8,000
- 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.
During the evening of September 6th scattered thunderstorms moved through the Treasure Valley and Boise Mountains with heavy rain and isolated wet microbursts. In and around Boise numerous reports of street flooding were received while in Boise County a number of small mud slides covered the road between Garden Valley and Lowman. Winds gusted to an estimated 60 to 70 mph at the NWS office in Boise, while numerous reports of trees down were received from around the city. Winds toppled a tree onto a car and caused scattered power outages.
The radar
The national radar mosaic for the moment the first event began.
Event by event
2 flood, 1 thunderstorm wind. Local standard time, as filed.
Flood, Boise
- When
- September 6, 4:30 PM MST to 5:20 PM MST
- Where
- Boise County, Garden Vly
- Reported by
- TRAINED SPOTTER
- Coordinates
- 43.989, -115.730 (the zone’s center; the record gives no point)
Thunderstorm Wind, Ada
- When
- September 6, 5:00 PM MST
- Where
- Ada County, Boise
- Measured
- 62 kt (71 mph)
- Property damage
- $8,000
- Reported by
- NWS EMPLOYEE(OFF DUTY)
- Coordinates
- 43.620, -116.220
What these are
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Hail and Damaging Winds in New York, September 6 to 7, 1998
- Hail and Damaging Winds in New York, September 6 to 7, 1998
- Hail and Damaging Winds in New York, September 6 to 7, 1998
- Hail and Damaging Winds in Vermont, September 6, 1998
- Hail and Damaging Wind in New York, September 6 to 7, 1998
- Flood and Hail in North Carolina, September 6, 1998
- Tropical Storm in Texas, September 6 to 11, 1998
- Flash Flooding in Puerto Rico, September 6, 1998
- Hail and Damaging Wind in Vermont, September 6, 1998
- Hail in Wisconsin, September 6, 1998
- Heat in Oklahoma, September 6, 1998
- Hail in West Virginia, September 6, 1998
More
Every storm in Idaho in 1998Every state in 1998This day in weather historyWarnings in Idaho, September 1998
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: 5668930, 5668931, 5668932.