One More Night of Heat - Storms Later

3:20 AM CVG: 82°, HEAT INDEX 87°

You're not mis-reading that above observation. At 3 AM Eastern Time Cincinnati is still above 80 degrees. Last night, if you recall, I said it didn't get below 80 until nearly 1 in the morning.

We'll probably stay near 80, or above, until sometime around 5-7 AM (the exception: If you get under a brief shower, you might just cool off a few degrees and drop below that 80 degree mark). Showers and storms will move in from the west and northwest. These are in association with what is really more of a "wind shift line" than a "cold front". Yes, the temperatures will drop behind this - but only for maybe a day. The main effect is that winds will go from the southwest to the northeast. Even that won't last as winds will quickly back around to the southeast again by Monday night into Tuesday.

Keep an eye on these storms today - they will have the potential of producing heavy rainfall and, if they are delayed for very long OR we get a break in activity, possibly being severe with damaging winds being the biggest threat. We'll have our eyes on the situation throughout the day.

~Jeremy Moses
@NKYWx on Twitter.com

PS: There may be some confusion as to why an Excessive Heat Warning was issued by the Weather Service for Cincinnati and Dayton proper - but only Heat Advisories for the other counties of the warning area.

Here's the explanation. Wilmington's policy is as follows for Excessive Heat Warnings versus Heat Advisories:

Heat Advisory:

All Zones: When the heat index values range between 100-104 degrees.

Excessive Heat Warning:

Outside the cities of Cincinnati and Dayton: Anytime the heat index reaches past 105 degrees.

In Cincinnati and Dayton, specifically for Hamilton and Montgomery Counties: Either the above OR if heat index values of 100-104 persist for a second consecutive day or more.

As yesterday was the second day of 100-104 degree heat index values in Cincinnati and Dayton themselves, that triggered local Excessive Heat Warning criteria. Due to the criteria being more strict outside those two cities, a warning wasn't called. However I do have reports that a few areas *MAY* have breached those criteria a time or two.