Today will be a hot and humid day with highs near 90 degrees this afternoon. We are currently in the warm sector of a storm system underneath the warm front. This will allow southerly winds to increase temperatures and humidity. The cold front will move through overnight through tomorrow morning bringing a squall line of storms that could be strong to severe.
Southern Indiana is under a slight risk of severe storms tonight as the cold front moves through; however, we will be keeping an eye on the entire viewing area for storms that could turn severe. Since the storms will first be moving into Southern Indiana as the cold front moves, the temperatures will be warmer here when the cold front hits, so that will provide extra energy to help power up storms.
Most of the storms will be moving through overnight. The strongest storms could cause wind damage and minor flooding. Southern Indiana will receive the most rainfall with upwards of 2" in some locations. The cold front bringing the storms will drop temperatures significantly tomorrow.
Here are your chances of storms tonight through tomorrow morning:
Wind damage will be the main threat with these storms as a squall line could create strong gusts. Southern Indiana could have flooded roads early tomorrow morning with these storms which could impact the morning commute.
Shortly after sunset (7:59p) this evening, storms should be approaching the northern portion of the WAVE 3 News Viewing area. The storms will first move into Lawrence, Jackson, Jennings, Dubois, Orange and Washington counties. These counties could be the hardest hit from these storms with the strongest winds and heaviest rain.
By midnight, the storms should be moving into the Louisville area. Other counties along the Ohio River will be impacted as the squall line of storms pushes into Kentucky.
Rain will still persist in Southern Indiana, and heavy downpours may set the stage for flooding by the morning.
The storms should be losing some of their power by the time they hit South Central KY. It is not out of the question to have a few stronger storms, but temperatures will be cooler by the time the storms hit this area, so that decreases the potential for severe thunderstorm warnings. Lingering rain will persist throughout much of the viewing area at this time.
The actual cold front will pass over Louisville and the Ohio River around 10am. At this time, we will notice temperatures starting to feel cooler and the humidity will also begin to drop. The showers will stop for Southern Indiana and Louisville. As the cold front moves farther south, the rain will exit south for a drier, cooler and less humid afternoon.
The heaviest rain is expected in Indiana, so a few flooded roadways are possible for Southern Indiana by Thursday morning. Remember: Turn Around Don't Drown! Never cross over flooded roadways. Most of the area will pick up between 1"-2" of rain. Some areas in Indiana could receive over 2".
This cold front will bring us "fall-like" weather by tomorrow. Another great impact from this system is a lower pollen count. Right now, ragweed is the culprit for many folks suffering from allergies. This is Hayfever Season, and the weed pollen has been very high. The cold front will push out the stagnant air which is currently holding all the pollen that has collected over the last week or so. As this air is pushed out, fresh air will move into the Ohio Valley giving relief to allergy sufferers.