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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).

Thursday, August 12, 2021

SPC Aug 12, 2021 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0216 AM CDT Thu Aug 12 2021 Valid 141200Z - 151200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER SOUTH FLORIDA... ...SUMMARY... At least a marginal risk for a tornado or two might evolve across south Florida Saturday in association with tropical storm Fred. ...South Florida... Tropical Storm Fred is forecast by the National Hurricane Center to reach the southern FL Peninsula Saturday. Based on this forecast, low-level shear may become sufficient for a threat of a couple of tornadoes with convection developing east of the center. ...Elsewhere... Numerous pulse and multicell storms will develop from the Northeast States into the southern Appalachians and west into the southern and central Plains. A few instances of downburst winds could occur with the stronger storms, but weak vertical shear and a modest thermodynamic environment suggest an organized severe threat is unlikely. One exception could be over the central High Plains where a belt of slightly stronger flow will reside above southeasterly post-frontal upslope winds. However, weak forcing and potential capping issues lower confidence in robust thunderstorm initiation at this time. ..Dial.. 08/12/2021 Read more LIVE: spc.noaa.gov
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