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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).

Wednesday, May 26, 2021

SPC May 27, 2021 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0753 PM CDT Wed May 26 2021 Valid 270100Z - 271200Z ...THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE CENTRAL GREAT PLAINS... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SURROUNDING THE MODERATE RISK INTO THE SOUTHERN HIGH PLAINS AND ACROSS PARTS OF THE NORTHEAST THIS EVENING... ...SUMMARY... Severe thunderstorms will continue across the central Great Plains tonight. The greatest tornado threat, including the potential for strong tornadoes, will continue through late evening. Intense damaging winds and very large hail are expected as well. ...Central Great Plains... Numerous discrete supercells, and evolving convective clusters, are noted from the NE Panhandle into central KS. Multiple reports of tornadoes, several from long-lived supercells, have been observed with convection that evolved along a baroclinic zone that has moved little during the day. This boundary will continue to serve as the focus for supercells tonight. Over the next few hours, LLJ should strengthen across KS into south-central NE. This should encourage one or more MCSs to evolve across the central Plains. Tornado threat remains highest this evening with supercells, along with very large hail; however, damaging wind threat should increase as an MCS evolves and begins to surge southeast toward north-central KS. ...Northeast... Widespread convection that evolved across the northeastern US has overturned much of the buoyancy that developed during peak heating. Remnant thunderstorm activity has progressed into southern New England, arcing southwest into the Delmarva region. The southwestern flank of this band of storms is shifting east within an environment that remains fairly unstable, per 27/00z IAD sounding. Until this air mass is overturned, or convection moves off the middle Atlantic Coast, some severe threat will linger. Greatest risk over the next few hours will be from portions of northern VA-southeast MD-DE. Wind is the primary risk with these storms. ..Darrow.. 05/27/2021 Read more LIVE: spc.noaa.gov
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