Storm Events Database

Event Details

Event Flash Flood
-- Flood Cause Heavy Rain
State WYOMING
County/Area FREMONT
WFO RIW
Report Source Department of Highways
NCDC Data Source CSV
Begin Date 2009-07-04 18:50:00.0 MST-7
Begin Location 4ENE RIVERTON
Begin Lat/Lon 43.04/-108.3
End Date 2009-07-04 21:15:00.0 MST-7
End Location 5SE RIVERTON
End Lat/Lon 42.98/-108.31
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 500.00K
Crop Damage 0.00K
Episode Narrative A storm that developed northwest of Dubois traveled along the Wind River Valley and walloped central Fremont County with hail and heavy rain. Hail up to several inches deep accumulated on U.S. Highway 26 northwest of Riverton near Kinnear. The worst of the flash flooding was in a swath from Riverton east along the Gas Hills Road.
Event Narrative Rainfall estimated at 1 to 2.5 inches fell in about 30 minutes along Gas Hills Road. WYDOT engineers reported 500 feet of shoulder was eroded from the road due to running water near mile marker 6.5. Two culverts in the area could not handle the extreme volume of water. Approximately three to four feet of the shoulder and road surface was swept away leaving a vertical drop of 12 to 14 feet. Witnesses said three feet of water was above the road surface along a quarter-mile stretch of the road for several hours.


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All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 550.00K 0.00K
UNION PASS SUBDVSN FREMONT CO. WY 07/04/2009 14:34 MST-7 Hail 1.00 in. 0 0 0.00K 0.00K
KINNEAR FREMONT CO. WY 07/04/2009 17:55 MST-7 Hail 0.75 in. 0 0 25.00K 0.00K
(RIW)RIVERTON RGNL A FREMONT CO. WY 07/04/2009 18:06 MST-7 Hail 0.88 in. 0 0 0.00K 0.00K
RIVERTON FREMONT CO. WY 07/04/2009 18:20 MST-7 Flash Flood 0 0 25.00K 0.00K
RIVERTON FREMONT CO. WY 07/04/2009 18:50 MST-7 Flash Flood 0 0 500.00K 0.00K
Totals: 0 0 550.00K 0.00K