Hail, Boise
- When
- May 8, 2:43 PM MST to 3:33 PM MST
- Where
- Boise County
- Measured
- 0.75 in hail
- Coordinates
- 43.989, -115.730 (the zone’s center; the record gives no point)
Hail in Idaho, May 8, 1994
2 hail, as filed by the National Weather Service.
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.
Event by event
2 hail. Local standard time, as filed.
Hail, Gem
- When
- May 8, 3:30 PM MST to 3:40 PM MST
- Where
- Gem County
- Measured
- 1 in hail
- Coordinates
- 44.062, -116.397 (the zone’s center; the record gives no point)
For the third consecutive day, thunderstorms forming in the flow around a cut-off low pressure system, moved east to west across southwest Idaho. The hardest hit areas were in Gem and Boise Counties, both of which are just north of the Boise metropolitan area. At 1443 MST, a thunderstorm produced dime-size hail in Idaho City, 25 miles northeast of Boise. Fifty minutes later, this same storm produced dime-size hail in Horseshoe Bend, 20 miles north of Boise. As the storm moved into Gem County, surface observations and radar indicated that it had intensified. Just north of Sweet, 25 miles north of Boise, a Gem County Sheriff reported quarter-size hail accumulating to a depth of two to three inches. The thunderstorm also began producing heavy rains near Sweet. A spotter at Black Canyon Dam, 25 miles northwest of Boise, received an inch of rain in less than an hour. These rains produced a rock slide across State Highway 52 south of Sweet. The rock slide blocked off the highway until midday the following day.
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
More
Every storm in Idaho in 1994Every state in 1994This day in weather historyWarnings in Idaho, May 1994
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: 10320864, 10320881.