Stormy end to work week – late night severe storm threat returns

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The afternoon heating Thursday has activated scattered thunderstorms.  As forecast these storms are driven by day time heating and the loss of an upper level high pressure system that was present Wednesday.  Locally heavy downpours are expected through sunset.  These storms will diminish in coverage around 9PM.

Lightning Tracker

Radar Image
Thursday 3:30PM


Several squall lines are forecast to sweep the state of Indiana to finish off the work week and enter the weekend.  The Storm Prediction Center has outlined Central Indiana for the risk of severe storms Friday and Saturday.  The Fox 59 weather center has identified two to possibly three squall lines to sweep the state, starting early morning Friday and lasting through Saturday night.  The passage of the cold front late Saturday night will bring an end to the rain and storm threat by Sunday morning.

A line of severe storms will develop in a tornado watch region of Illinois later tonight.  That line of storms is forecast to enter the state after 2AM.  This line is expected to lose much of its energy but will be monitored later tonight.

Severe weather outlook


With abundant moisture in the atmosphere the next three days, thunderstorms that develop could produce very heavy rainfall.  Any thunderstorm can produce locally higher amounts of rain by wringing out the available juice.  With higher dew points comes the threat of a more tropical down pour.  Seven day rainfall numbers are in good agreement with a model average of 1.97″.  Underneath the wrong storm those amounts could easily reach 2″ to 3″.  Heavy rainfall is a possibility should storms erupt.  Precipitable water (the amount of evaporated rainfall potentially in the air) is going to top 1.77″.  That means this air is loaded with juice.


Tropical air is streaming north form the Gulf of Mexico and the highest levels of humidity (dew points) have arrived.  Dew point numbers hit 70° at Peru Wednesday and again Thursday afternoon. The dew point is as measure of moisture in the atmosphere and when it hits 60° or higher, it becomes more uncomfortable.


The Indiana corn crop is about done with statewide planting, with 86 percent planted.  That’s a huge number considering that farmers had to overcome an extremely wet April.  To date, the corn crop is ahead of the average by 9 percent.  Soy planting has doubled since last week with 6 percent of the crop in the field, 11 percent ahead of the average pace.

Crop Planting