Author: Ron Rothhaas

A heat wave is underway in North America, centered in the great plains of the U.S..  Cincinnati is on the eastern edge of this heat wave.  While extreme heat and worsening drought are affecting Texas, with very hot air into Missouri, this pattern will lead to very warm and relatively dry weather in the Ohio valley.  Most of the Ohio valley had decent rains last week.  Only scattered showers are possible this week along with summertime heat, so things may dry out as the week goes on.  Watch plants and new trees for signs of needing water.

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A very warm, humid and unstable airmass across the Ohio Valley is setting the stage for severe thunderstorms this afternoon and later tonight. A few thunderstorms may develop later this afternoon, mainly near an outflow boundary which stretches from eastern Indiana into south central Ohio. Any storms which develop this afternoon may become severe with large hail and damaging winds.

A more organized complex of thunderstorms is expected to develop across the mid-Mississippi Valley and lower Great Lakes this evening, and roll into parts of the Ohio Valley late this evening and overnight. The potential exists for a widespread damaging wind event across parts of Indiana, Ohio and far northern Kentucky tonight, with significant damaging winds in excess of 70 mph possible. Large hail and isolated tornadoes are also possible. In addition, these storms may contain very heavy rainfall which may lead to areas of flooding.

Stay tuned to NOAA weather radio or your local media outlet for more information on this potentially dangerous situation.

Thursday and Thursday night:

…OH VALLEY THROUGH TN VALLEY AREA…
   
   DAMAGING WIND AND LARGE HAIL ARE EXPECTED TO BE THE
   PRIMARY THREATS WITH  SCATTERED TO ISOLATED ACTIVITY IN THE CINCINNATI AREA.

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Friday and Friday night:

A POTENTIALLY SIGNIFICANT SEVERE WEATHER EVENT COULD EVOLVE DURING
   THE DAY2 PERIOD FROM PORTIONS OF THE MID MS VALLEY ACROSS THE OH
   VALLEY REGION AS STRENGTHENING FLOW ALOFT SPREADS ATOP A VERY
   UNSTABLE AIRMASS.  A POTPOURRI OF HAZARDOUS WEATHER CAN BE EXPECTED
   WITH LARGE HAIL…DAMAGING WINDS AND PERHAPS TORNADOES.

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