An upper-level low pressure system over Iowa this morning will move East/Northeastward into the Great Lakes region through tonight. Thunderstorms will develop and/or reorganize along and ahead of a cold front that trails the low all the way down into the lower Mississippi River Valley.
The latest severe weather outlook for today from the SPC in Norman, OK is shown below:
Severe thunderstorms are forecast within the yellow shaded areas on the image. The main threat for severe weather in these areas will exist from mid-afternoon into this evening as the atmosphere heats up and becomes unstable, allowing new thunderstorms to form and/or existing thunderstorms to become stronger and more organized.
Large hail, damaging wind gusts and a few tornadoes are possible with severe storms in these areas. The greatest risk of tornado development is within the brown shaded area on the image below:
...the greatest risk of damaging wind gusts will be within the yellow and especially the red shaded areas on this image:
...and the greatest risk of large hail (i.e., 1 inch diameter or larger) will be within the yellow shaded areas on the following image:
If you live in or near the above outlined severe weather threat areas, which includes the cities of Chicago, Detroit, Ft. Wayne, Jackson, TN and Tupelo, MS, please remain alert today to the possibility of severe weather. Review severe weather safety tips ahead of time and be sure that you have a sheltering place in mind should severe weather threaten your area or a warning be issued.
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