Storm activity continues this evening with a low severe weather risk

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DAYTON, Ohio (WDTN)

7:30 p.m. Weather Update: No severe thunderstorms are in the Miami Valley. The rain cooled air has overtaken most of the area. Severe thunderstorms are not likely in this environment. Rain and a few thunderstorms will continue through midnight. 

We will see a slight risk for severe weather return to the Miami Valley Thursday afternoon and evening. The main threat will be damaging winds with isolated areas of large hail. 

7:00 p.m. Weather Update: Severe Thunderstorm Warning is in place for the storm moving into Hamilton and southwest Butler County. Quarter sized hail and 60 mph wind gusts are possible. The storm is moving NE at 40 mph. The warning is until 7:15 p.m. 

6:30 p.m. Weather Update: Severe Thunderstorm is moving into Butler County. 60 mph winds and quarter sized hail is possible. The warning is until 6:45 p.m. This storm is moving NE at 40 mph. It is moving into cooler air, so it should begin to weaken over the next 30 minutes. 

5:15 p.m. Weather Update: The line of thunderstorms continues to move across the Miami Valley. So far the storms are staying below severe criteria. A few may have pea sized hail and 40-50 mph wind gust. 

At 4 p.m. Dayton reached 80 degrees. Warm air leads to more instability which leads to more storms.

The temperature in Dayton dropped 9 degrees between 4 and 5 p.m. 

Rain cooled air is to blame.

You can see the areas seeing rain are much cooler than the southern half of the Miami Valley.

As the rain falls winds pick up out of the thunderstorm. This creates an outflow boundary that extends away from the storm. Sometimes this boundary produces strong enough winds and a temperature gradient that is big enough to create more thunderstorms.  

Rain has picked up along this line. 

We are starting to see heavy rain move into the northwest side of Dayton. A few lighting strikes are associated with this storm. The lightning may impact sporting event plans for the evening. 

2:30 p.m. Weather Update: The Miami Valley is in a marginal risk for severe weather. This means we have a low chance for an isolated severe thunderstorm. 

Temperatures will near 80 degrees this afternoon. This will help give the atmosphere energy and the storms fuel. 

A line of storms developed from Wayne County Indiana to Auglaize County Ohio as of 2:30 p.m. This line of storms will continue to track east while the individual storms will move north northeast. 

The eastward motion is only about 15 mph. The storms are quickly moving NNE about 40 mph. 

Training storms may lead to isolated areas of flooding. 

This original line of storms will move through over the next 3 hours. Between 5 and 6 p.m. A disturbance centered over eastern Tennesse right now will move into the Miami Valley bringing another round of thunderstorms to the area. These will have the chance to be severe. 

The greatest risk will be gusty winds, small hail and an isolated tornado. 

Timing for severe weather will be between now and 9 p.m. The energy will weaken overnight. Howevere a thurd round of thunderstorms will move through between 9 p.m. and 2 a.m. 

We will see a slight risk for severe weather return to the Miami Valley Thursday afternoon and evening. The main threat will be damaging winds with isolated areas of large hail. 

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