Flash Flood, San Juan
- When
- July 9, 12:10 PM MST to 3:00 PM MST
- Where
- San Juan County, Monticello
- Property damage
- $50,000
- Coordinates
- 37.626, -109.805 (the zone’s center; the record gives no point)
Flash Flood in Utah, July 9, 1996
Tropical moisture moved into an already unstable airmass over southeast Utah. Thunderstorms developed during the early afternoon in San Juan county and a few had very heavy rainfall.
Where it happened
Every event with a place to put it; 1 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
- $50,000
- Crop damage
- None recorded
- Events
- 1
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 SLC wrote it up.
Tropical moisture moved into an already unstable airmass over southeast Utah. Thunderstorms developed during the early afternoon in San Juan county and a few had very heavy rainfall. One spotter in Monticello reported receiving 2" of rain in 40 minutes. Another spotter just south of Monticello had 2.64" in 80 minutes. Local officials had extensive reports of basement flooding. Several businesses in town had water damage. State route 191 just south of town had be temporarily closed due to debris on the road.
The radar
The Grand Junction radar (KGJX), 212 km away, was scanning. The volume nearest the first event began at 19:07 UTC.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood in Colorado, July 9, 1996
- Tornado in Texas, July 9, 1996
- Heavy Rain in Texas, July 9, 1996
- Flash Flood in New Mexico, July 9, 1996
- Lightning Strike in Maine, July 9, 1996
- Lightning Strike in New Mexico, July 9, 1996
- Tornado and Hail in Connecticut, July 9, 1996
- Damaging Wind in New York, July 9, 1996
- Damaging Wind in Texas, July 9, 1996
- Lightning Strike in Maine, July 9, 1996
- Lightning Strike in New Hampshire, July 9, 1996
- Damaging Wind in New York, July 9, 1996
More
Every storm in Utah in 1996Every state in 1996This day in weather historyWarnings in Utah, July 1996
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: 5570124.