Nowcasting From Here On Out with Broken Line of Storms (Gust to 69 mph Just West of Chicago)July 19th, 2013 at 10:48 pm by Chad Evans under Chad's WLFI Weather Blog
Timing with model solutions is off on this line of storms. It is 10:45 p.m. & the line is sitting at Chicago & storms over the same locations & only very slowly shifting southeast. Winds have gusted to 69 mph at Aurora Municipal Airport near Chicago with gusts to 60 mph on the northside of Chicago & a gust to 55 at O’Hare.
That said, threw out the models (even the HRRR & NAM-HIRES Hi-Res models) & will just nowcast this line from here on out.
Broken line of storms will pass overnight-early Saturday morning after midnight. I still cannot rule out a couple microbursts &/or some hail with brief torrential downpours (MUCAPE is still up to 4000 J/kg, meaning it is still very unstable with lots of energy available for some storms). Any lingering showers/storms will exit by noon Saturday.
Since the line will be broken, not everyone will get the rain.
So, in hindsight, the trend for an late overnight-early morning line, which was originally forecasted, will probably come to fruition (until models began to bring it in sooner).
Regardless, it was a hot day with many of you seeing the hottest day so far this year. Heat index peaked varied from 99 (Cass County Airport) to as high as 109 (Remington). Here at WLFI, it peaked at 104, after a high temperature of 94.4 degrees.
As of 11 p.m., it was the hottest for such a time since early last August.