Thunderstorm Wind, Canyon
- When
- July 18, 5:35 PM MST to 6:35 PM MST
- Where
- Canyon County, Countywide
- Measured
- 60 kt (69 mph)
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 43.567, -116.783
Tornado and Damaging Wind in Idaho, July 18, 2000
Monsoonal moisture moving into Southeast Oregon and Southwest Idaho, coupled with a weak area of low pressure, initiated afternoon covection in Southeast Oregon. As the line of thunderstorms moved into Southwest Idaho, a thunderstorm outflow boundary collided with another strong cell in southern Ada county, generating a short-lived tornado.
Where it happened
Every event with a place to put it. 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.
Monsoonal moisture moving into Southeast Oregon and Southwest Idaho, coupled with a weak area of low pressure, initiated afternoon covection in Southeast Oregon. As the line of thunderstorms moved into Southwest Idaho, a thunderstorm outflow boundary collided with another strong cell in southern Ada county, generating a short-lived tornado. Three storm spotters independently witnessed the evolution and touchdown of the tornado, which was also confirmed by a follow-up storm survey. The tornado touched down on an unpopulated, barren butte and no injuries or damages were sustained. Prior to the tornado, high winds ripped through Canyon county with gusts to 60 mph. An old growth tree was snapped and several power lines were felled.
The radar
The Boise radar (KCBX), 45 km away, was scanning. The volume nearest the first event began at 00:35 UTC.
Event by event
1 thunderstorm wind, 1 tornado. Local standard time, as filed.
Tornado, Ada
- When
- July 18, 5:57 PM MST to 6:00 PM MST
- Where
- Ada County, 3 mi SW of Kuna
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 15 yd
- Reported by
- TRAINED SPOTTER
- Coordinates
- 43.450, -116.450
What these are
- 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.
- Tornado
- A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Heat in Louisiana, July 18, 2000
- Heat in Mississippi, July 18, 2000
- Heat in Mississippi, July 18, 2000
- Lightning Strike in Louisiana, July 18, 2000
- Heat in Texas, July 18, 2000
- Flood and Heavy Rain in Nebraska, July 18 to 19, 2000
- Damaging Wind in Idaho, July 18, 2000
- Tornado in Missouri, July 18, 2000
- Flood in Illinois, July 18, 2000
- Hail and Damaging Winds in Kansas, July 18, 2000
- Lightning Strike in Maine, July 18, 2000
- Hail and Damaging Winds in Vermont, July 18, 2000
More
Every storm in Idaho in 2000Every state in 2000This day in weather historyThe tornado archive for Idaho, 2000Warnings in Idaho, July 2000
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: 5155518, 5155517.