Flood, Ada
- When
- September 7, 4:25 PM MST to 4:45 PM MST
- Where
- Ada County, Boise
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.451, -116.241 (the zone’s center; the record gives no point)
Flood and Damaging Wind in Idaho, September 7, 1998
Scattered thunderstorms produced heavy rains and isolated wet microbursts in the Boise area. Numerous reports of street flooding were received from around the city.
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
- $30,000
- 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.
Scattered thunderstorms produced heavy rains and isolated wet microbursts in the Boise area. Numerous reports of street flooding were received from around the city. Lightning caused a structure fire in Boise while about 3000 people were without power due to trees falling on power lines. At Shadow Valley on the outskirts of Boise, winds ripped two sections of roof off of an elementary school.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 flood, 1 lightning, 1 thunderstorm wind. Local standard time, as filed.
Lightning, Ada
- When
- September 7, 4:40 PM MST
- Where
- Ada County, Boise
- Property damage
- $10,000
- Reported by
- FIRE DEPT/RESCUE SQUAD
- Coordinates
- 43.451, -116.241 (the zone’s center; the record gives no point)
Thunderstorm Wind, Ada
- When
- September 7, 4:40 PM MST to 4:50 PM MST
- Where
- Ada County, Boise
- Measured
- 55 kt (63 mph)
- Property damage
- $20,000
- Reported by
- TRAINED SPOTTER
- 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.
- Lightning
- A lightning strike that killed, injured or caused damage.
- 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
- Tropical Storm in Texas, September 7 to 12, 1998
- Tornado and Hail in New York, September 7, 1998
- Damaging Wind in New Jersey, September 7, 1998
- Tornadoes and Hail in New Jersey, September 7, 1998
- Damaging Wind in New Jersey, September 7, 1998
- Damaging Wind in New Jersey, September 7, 1998
- Hail and Damaging Winds in Michigan, September 7 to 26, 1998
- Lightning Strike in Pennsylvania, September 7, 1998
- Damaging Winds in Pennsylvania, September 7, 1998
- Flash Flood and Hail in Pennsylvania, September 7 to 27, 1998
- Damaging Winds in Pennsylvania, September 7, 1998
- Hail and Damaging Winds in West Virginia, September 7, 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: 5668933, 5668934, 5668935.