FloodZoneMap.org

Flash Flood — Natrona, WY

Jun 5, 2017

A cold front swept across Wyoming on the afternoon and evening of June 5th. With some additional upper level support from a vorticity maximum, thunderstorms developed across central Wyoming. A couple of these storms become severe. Quarter size hail was reported near Evansville. In addition, very heavy rain fell with some of these storms and caused localized flash flooding along Webb Creek Road when Webb Creek overflowed it's banks.

Source: NOAA National Weather Service Storm Events Database (event 697584). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Natrona, WY

This event is one of many recorded floods in Natrona County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Natrona County flood data →

More Flood Stories

Flash Flood$2.9M damage

Natrona, WY · Jun 15, 2023

On June 15th, roughly between 300 PM and 415 PM MDT, slow moving thunderstorms fueled by a wet air mass led to heavy rain over parts of Natrona County, including the city of Casper, WY and surrounding suburbs.

Read the full account →
Flash Flood$5.0M damage

Natrona, WY · Jul 3, 2009

Intense rainfall accompanied a strong thunderstorm which gained strength just west of Casper before blasting through town. The thunderstorm formed in a uncharacteristically moist airmass where precipitable water values approached 150% of normal.

Read the full account →
Flash Flood$100K damage

Natrona, WY · May 24, 2015

A slow-moving upper level low south of Wyoming sent waves of moisture northward over central and eastern Wyoming during the Memorial Day holiday weekend. Measured and estimated rainfall totals ranged from two to around five inches.

Read the full account →
Flash Flood$500K damage

Natrona, WY · Jul 25, 2005

A line of strong thunderstorms moved west to east across Natrona County between 4:30 p.m. and 6:30 p.m. These storms originated over the Bighorn mountains of Wyoming and rapidly intensified near the Natrona County International Airport, 6 miles west of Casper, where a 54 kt wind…

Read the full account →