Moderate Risk, Crazy Dew Points in OH

A Moderate Risk is again in effect for parts of the Ohio Valley today.

Already, one tornado has been reported in Illinois, winds have gusted to 70 mph, and 2.5" diameter hail has been reported. Keep an eye on the StormMatrix below as the numbers add up tonight.

StormMatrix Stats Box:

Storms have broken out over Indiana and Ohio already today, as the 2:30 p.m. Eastern shot from AccuWeather.com RadarPlus shows below. Another area of storms is located in Missouri and supercell storms dot the map in between.

Radar / Pressure / Visible Satellite / Winds At 2:30 PM

One reason for the unstable atmosphere today are high dew points.

Here at AccuWeather HQ, dew points have been increasing all day and Henry (who pointed out the high dew points to me) says that it's stifling outside. It's rare for dew points to approach 70 here in Pennsylvania.

Today's Dew Point Graph From AccuWeather HQ Weather Station

To our west, dew points are incredible -- 73 in the western part of our state, 75 in Dayton Ohio, and a maximum of 77 in Danville, Ilinois. It's rare for dew points to pass the mid 70s anywhere, so this is a sure sign of extremely unstable air.

High Dew Point Temperatures At 2 PM

AccuWeather.com Severe Weather Expert Henry Margusity contributed to this story. You can read Henry's blog on AccuWeather.com Premium.

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