Temperatures Thursday afternoon were warm, but it wasn't overly humid. That will change late Thursday night and Friday afternoon ahead of a cold front that will sweep through by Saturday morning.
A weakening area of thunderstorms continues to expand across southern and eastern Iowa Thursday evening. We likely won't see too much of that here until after Midnight, meaning you should be able to make the most out of your Thursday evening.
An increasing low level jet will slowly build across Iowa tonight. Just like the main jet stream up above, the low level jet helps focus thunderstorms (especially ones that develop overnight). It provides the moisture and wind needed to help keep thunderstorms going. As that begins to veer east Friday, we'll begin to see thunderstorms increase in coverage through the day.
A likely scenario that will play out Friday is this: ongoing showers and thunderstorms will be lifting north into Wisconsin during the morning Friday. There could be a time that we begin to clear out mid-morning in the wake of those showers. With the heating of the day, scattered thunderstorms will begin to develop during the afternoon and evening. Now, there isn't a lot of forcing in the atmosphere - meaning not a ton of upper level jet stream support - but there will be a decent amount of moisture.
As a cold front slides east through late afternoon and evening, thunderstorms will continue into the overnight. Severe weather remains low, but a few stronger storm cells Friday could have gusty winds. Heavy rain will also become a threat with any storms that do develop, which could lead to minor flooding.
As always, if you have any outdoor plans on Friday, make sure you keep an eye to the sky and right here for all the latest updates.
A weakening area of thunderstorms continues to expand across southern and eastern Iowa Thursday evening. We likely won't see too much of that here until after Midnight, meaning you should be able to make the most out of your Thursday evening.
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