Tornado, Arapahoe
- When
- July 15, 1:50 PM MST
- Where
- Arapahoe County, 17 mi W of Byers
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 25 yd
- Reported by
- STORM CHASER
- Coordinates
- 39.720, -104.530
Tornadoes and Hail in Colorado, July 15, 1998
4 hail, 2 tornado, 2 thunderstorm wind, as filed by the National Weather Service.
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
- 8
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.
The radar
The national radar mosaic for the moment the first event began.
Event by event
4 hail, 2 tornado, 2 thunderstorm wind. Local standard time, as filed.
Tornado, Arapahoe
- When
- July 15, 2:01 PM MST
- Where
- Arapahoe County, 12 mi WSW of Deer Trail
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 25 yd
- Reported by
- STORM CHASER
- Coordinates
- 39.550, -104.250
Two small landspouts touched down briefly but did no damage.
Hail, Weld
- When
- July 15, 4:55 PM MST
- Where
- Weld County, 5 mi NW of Keenesburg
- Measured
- 0.88 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.150, -104.580
Hail, Weld
- When
- July 15, 5:25 PM MST
- Where
- Weld County, 9 mi ENE of Grover
- Measured
- 1 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.920, -104.050
Thunderstorm Wind, Weld
- When
- July 15, 5:25 PM MST
- Where
- Weld County, 9 mi ENE of Grover
- Measured
- 56 kt (64 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.920, -104.050
Strong thunderstorm winds to 64 mph (53 kts) and large hail did an undetermined amount of damage to cropland in the area.
Hail, Morgan
- When
- July 15, 5:45 PM MST
- Where
- Morgan County, 3 mi NW of Orchard
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.370, -104.150
Hail, Morgan
- When
- July 15, 6:20 PM MST
- Where
- Morgan County, Ft Morgan
- Measured
- 0.88 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.250, -103.800
Thunderstorm Wind, Morgan
- When
- July 15, 6:25 PM MST
- Where
- Morgan County, 3 mi E of Weldona
- Measured
- 61 kt (70 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 40.350, -103.920
What these are
- 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.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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
- Heat and Hail in Texas, July 15, 1998
- Lightning Strike in Kansas, July 15, 1998
- Flash Flood in Kentucky, July 15, 1998
- Flash Flooding in Kentucky, July 15, 1998
- Hail and Damaging Wind in New York, July 15, 1998
- Flash Flooding and Hail in Kansas, July 15, 1998
- Flash Flooding in Kentucky, July 15, 1998
- Flash Flood in Florida, July 15, 1998
- Flash Flood in Nebraska, July 15, 1998
- Hail and Damaging Wind in Oklahoma, July 15, 1998
- Hail and Damaging Winds in Missouri, July 15, 1998
- Hail in Nebraska, July 15, 1998
More
Every storm in Colorado in 1998Every state in 1998This day in weather historyThe tornado archive for Colorado, 1998Warnings in Colorado, July 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: 5662569, 5662570, 5662573, 5662571, 5662572, 5662574, 5662575, 5662576.