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Archives for Chicago's hourly weather data updated 24-48 hours after end of each day. MOBILE CHGOWX.COM ...
Weather conditions on bar directly above are near Lakefront. Weather conditions with Moon are O'Hare (official).

Sunday, June 13, 2021

SPC Jun 13, 2021 Day 4-8 Severe Weather Outlook

Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0345 AM CDT Sun Jun 13 2021 Valid 161200Z - 211200Z ...DISCUSSION... A cold front will move east across the northern Plains on Wednesday/D4 as a shortwave trough ejects northeast across SK and MB. While a few storms are possible well ahead of the front into MN where warm advection will be the main lifting mechanism, significant drying with the front and veering flow of the surface may suppress storms along the cold front itself. To the east, an upper low will move toward the Canadian Maritimes, with an upper trough extending south along the East Coast. A front may linger near the coastal Southeast, but is most likely to be offshore by Wednesday afternoon. A broad belt of northwest flow aloft will develop over the northern Plains and upper MS Valley on Thursday/D5, and will spread across the Great Lakes and into the Northeast through the remainder of the period. High pressure initially over the Great Lakes on Thursday/D5 will gradually weaken, allowing moistening across the MS and OH Valleys each day. Clusters of thunderstorms will be possible in this pattern, but predictability is low given the regime. Read more LIVE: spc.noaa.gov
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