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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 17, 2021

SPC Oct 18, 2021 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0736 PM CDT Sun Oct 17 2021 Valid 180100Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across much of the U.S. through tonight. ...01Z Outlook Update... Outside of a few rather localized areas, dry and/or stable conditions prevail across much of the U.S., and the risk for thunderstorms appears likely to remain generally negligible through tonight. ...South Florida and the Keys... Ahead of a southward advancing cold front, a moist and potentially unstable boundary-layer layer lingers. However, relatively warm and subsident mid-levels have precluded deep convective development across southern portions of the Florida Peninsula. Mid-level inhibition might be marginally weaker across the Keys into the Florida Straits, where there still appears low probabilities for a couple of thunderstorms this evening. ...Lower Great Lakes... The 18/00Z raob from Buffalo indicates only very weak conditional instability beneath relatively cold mid-level air associated with the large-scale upper troughing. However, low-level lapse rates may be a bit steeper out over Lakes Erie and Ontario. As forcing for ascent associated with a perturbation digging south-southeast of Georgian Bay/Lake Huron begin impacting the region later this evening, some convection capable of producing lightning might not be out of the question. ..Kerr.. 10/18/2021 Read more LIVE: spc.noaa.gov
http://dlvr.it/S9mnFX