FloodZoneMap.org

Flash Flood — McClain, OK

May 6, 2015

A potent Spring storm system took shape across the Southern and Central Plains. Strong surface cyclogenesis took shape during the day, allowing ample moisture to return northward with strong southerly flow. At the same time, a strong upper level shortwave trough allowed strong mid level westerlies to overspread much of the Plains region. With large instability and wind shear, the stage was set for widespread severe storm development. Storms initiated within the open warm sector ahead of the dryl

Source: NOAA National Weather Service Storm Events Database (event 579730). Narrative written by NWS staff at the time of the event.

Flood Risk Context for McClain, OK

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

View McClain County flood data →

More Flood Stories

Flash Flood1 death$30K damage

McClain, OK · May 20, 2015

Severe storms developed near a stalled boundary across Oklahoma and the panhandles and moved eastward through the afternoon and evening of the 19th, causing widespread heavy rainfall and additional flooding.

Read the full account →
Flash Flood

McClain, OK · Apr 26, 2025

A slow-moving mesoscale convective vortex (MCV) produced severe weather and flash flooding during the morning and afternoon of the 26th. An initial complex of thunderstorms across southwestern Oklahoma and western-north Texas produced reports of thunderstorm wind damage and…

Read the full account →
Flash Flood$400K damage

McClain, OK · Jul 10, 2007

A boundary moved southeast into Oklahoma during the afternoon hours of the 9th. An upper level wave accompanied this front, and combined with afternoon heating helping severe thunderstorms to develop during the afternoon and overnight hours.

Read the full account →
Flash Flood$30K damage

McClain, OK · Oct 22, 2000

Significant flash flooding and 6 tornadoes, mostly small, weak and short-lived, developed on the 22nd, across a 35 mile wide band from near Frederick in southwest Oklahoma northeastward to near Chandler in central Oklahoma. Rainfall amounts in this band averaged 4 to 8 inches.

Read the full account →