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Archives for the SPC Convective Outlook are updated daily (approximately) with a live map at the beginning of each article. Follow the link at the end of the article to check for current updates on the NOAA/NWS Storm Prediction Center website. Also, see Archives for Chicago's hourly weather data on CARDINAL NEWS Magazine.

Sunday, June 20, 2021

SPC Jun 20, 2021 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0755 PM CDT Sat Jun 19 2021 Valid 200100Z - 201200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ALONG THE NEBRASKA/KANSAS CORRIDOR... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER SEVERAL AREAS...INCLUDING PARTS OF THE PLAINS...MID MISSISSIPPI VALLEY...OHIO VALLEY...AND SOUTHEAST... ...SUMMARY... Damaging winds will be common with convection across the central Plains tonight. Isolated hail/wind are also possible across portions of the mid Mississippi/Ohio Valley region. A couple of tornadoes remain possible in association with the remnants of Claudette. ...01z Update... Central High Plains convection has developed as earlier anticipated. This activity has matured quickly into an MCS near the CO/NE/KS border, and it will surge east along the NE/KS border after sunset as LLJ strengthens across KS into southern NE. Several wind reports in excess of 75mph have already been reported across eastern CO and if the developing bow over northwestern KS accelerates, additional wind reports in excess of 70mph remain possible. Semi-persistent corridor of back-building thunderstorms continue across northeast MO. A reservoir of very unstable air currently extends across northeast KS/northern MO. With southwesterly inflow into this activity, renewed updrafts may continue to develop into the northwestern flank this complex. Downstream, thunderstorms have organized in the lee of lake MI across northern IN. This activity should propagate southeast over the next few hours and currently resides in an air mass that supports robust updrafts. Will orient the SLGT Risk across northwestern OH/northern IN to account for this cluster. A couple of tornadoes remain possible in association with the remnants of Claudette. Strongest low-level shear is shifting east across the FL Panhandle into southwestern AL, and this is the primary concern the rest of tonight. ..Darrow.. 06/20/2021 Read more LIVE: