lt's Flash Flood Season In Much Of the U.S. No Big Threats In Vermont - Yet

Damage from flash flooding near Hinesburg, Vermont
in July, 2024. We're now entering prime flash flood
season, and Vermonters still have some PTSD from
the floods of the last three summers. Very slight 
chance of some local flash floods Wednesday night
in Vermont, but no big threats ---yet

Summer is the season of flash floods in the United States.

Such floods can happen anytime of year, of course. But summer, with its slow moving and/or intense thunderstorms, is the prime season. 

Sunday night, a flash flood emergency was declared in and around Huntsville, Alabama, where people had to be plucked from flooded cars. Water also got into several homes. 

We're already seeing some pretty big flash floods this week.  On Monday, rain fell at a rate of up to four inches per hour around Joplin, Missouri, and some people had to be rescued from inundated cars. Fox Weather reports. Downtown Seneca, Missouri was also flooded out. 

Flash flooding was reported in Texas, too.

Overnight, severe storms prompted flash flood warnings in central Kansas, where up to 5.5 inches of rain fell and another one to two inches was expected. Parts of the southeastern U.S. and Tennessee Valley are at risk for flash floods today.  

For Wednesday night, NOAA's Weather Prediction Center added a marginal risk for flash flooding in northern New York, all but far southern Vermont and northern New Hampshire. 

The agency said very humid air and a weather disturbance cold cause some instances of local flash flooding. 

Local meteorologists and myself are not too worried about flash flooding tomorrow and tomorrow night. We could easily see some gully washer downpours, but serious flooding looks doubtful. 

Most of us will get a half inch or less of rain Wednesday through Thursday. That doesn't scream "flooding."  But, thunderstorms could dump much more than that in small, localized areas.

Still, this is Vermont, and we have a long history of flash flooding. Our steep terrain in many areas encourages water to rush out of the hills during torrential rains. Climate change has raised the stakes, as downpours in a warmer world tend to be more intense. Warmer air can hold more water. That water can get released in the right conditions. 

Those "right conditions" in Vermont led to severe, destructive and deadly summertime flash floods in 2023 and 2024. Less extensive but still severe flash floods hit parts of the Northeast Kingdom last summer.

As a result, we're all gun shy and a little bit PTSD-wracked when it comes to flash flood risks across the Green Mountain State. Tis the season to keep a close eye on weather forecasts around here, especially if it's really humid and threatening to storm.