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Where does the moisture come from in these situations? I can understand convection of the lakes, but what about to the west of them?
The lake moisture is more of a winter phenomenon producing lake effect snow, especially over Indiana and eastward of the lakes. Chicago usually misses out on the heavier amounts. n June, Lake Michigan is still very cool, and tends to stabilize the air, lowering dew points if an east "lake wind" develops. This happened the other day:
Summer convection arises from jet stream slicing through the region, and plumes of humidity funneling into the Midwest from the Gulf of Mexico. Dew Points commonly reach 70F/21C.
The lake moisture is more of a winter phenomenon producing lake effect snow, especially over Indiana and eastward of the lakes. Chicago usually misses out on the heavier amounts. n June, Lake Michigan is still very cool, and tends to stabilize the air, lowering dew points if an east "lake wind" develops. This happened the other day:
Summer convection arises from jet stream slicing through the region, and plumes of humidity funneling into the Midwest from the Gulf of Mexico. Dew Points commonly reach 70F/21C.
Thanks.
So it comes from the south and runs up the eastern side of the Rockies?
it's a stormy rain season day here in Miami. it's a currently rain cooled 77f with a dew point of 72f.
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