Colorado, 1999

Flash Flood in Colorado, August 4, 1999

August 4, 1999 · NWS GJT · 1 event in 1 county or zone

A flash flood washed several tons of rock and other debris from Nourse Creek onto State Highway 149.

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
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The toll

Deaths
0
Injuries
0
Property damage
$1,000
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 GJT wrote it up.

A flash flood washed several tons of rock and other debris from Nourse Creek onto State Highway 149.

The radar

The national radar mosaic for the moment the first event began.

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Event by event

1 flash flood. Local standard time, as filed.

Flash Flood, Hinsdale

When
August 4, 2:00 PM MST to 3:00 PM MST
Where
Hinsdale County, 6 mi N of Lake City
Property damage
$1,000
Reported by
NEWSPAPER
Coordinates
37.821, -107.300 (the zone’s center; the record gives no point)

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

More

Every storm in Colorado in 1999Every state in 1999This day in weather historyWarnings in Colorado, August 1999

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: 5713914.