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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, October 3, 2021

SPC Oct 3, 2021 1300 UTC Day 1 Convective Outlook

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0740 AM CDT Sun Oct 03 2021 Valid 031300Z - 041200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast today. ...Lower MI to MS/AL... A low-amplitude shortwave trough over the Mid-MS Valley will slowly decay as it shifts east across the lower Midwest. Scattered showers and thunderstorms are ongoing ahead of this trough within a rich moisture plume characterized by 1.50-1.75 inch PW values from the southern Great Lakes to the central Gulf Coast. This activity should become increasingly numerous as pockets of modest boundary layer heating occur, yielding a fairly extensive swath of broken convection this afternoon. Modest MLCAPE is anticipated as mid-level lapse rates will generally remain poor, as sampled by 12Z soundings. A belt of 30-35 kt 500-mb west-southwesterlies should largely become centered across parts of the TN to OH Valleys at peak heating, atop generally weak and veered low-level flow. While nonzero potential exists for locally strong gusts and small hail with weak/transient mid-level organization, the probability of either hazard reaching 5% severe coverage is unlikely over such an expansive portion of the east-central states. It is possible that later outlooks may be able to discern a corridor of cat 1/Marginal Risk within this broad, low potential region. ..Grams/Mosier.. 10/03/2021 Read more LIVE: spc.noaa.gov
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