Tornado Watch Until 1am

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The NWS has issued a tornado watch until 1am which includes Chicago. Note that the tornado threat extends until well after dark.
Note there is a "moderate" chance of strong tornadoes, a moderate chance of 2" and larger hail and a moderate chance of 65 knots (= 75 mph) wind gusts.

Pretty much as forecast, thunderstorms are developing in the northwest part of the outlook area (below). Radar from 6:19pm below. These are expected to intensify into supercells and move southeast.
I'll update again later this evening.

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