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MOBILE DEVICE? Turn sideways. Weather conditions directly above are near Lakefront. Top tabs refer to O'Hare (official).

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.


Tuesday, May 9, 2023

SPC May 9, 2023 Day 4-8 Severe Weather Outlook

LIVE MAP (ABOVE) ... Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0336 AM CDT Tue May 09 2023 Valid 121200Z - 171200Z ...DISCUSSION... An upper low is forecast to drift very slowly northeastward across the Nebraska/South Dakota vicinity Day 4/Friday, while a second/weak disturbance moves out of northern Mexico into central and southern Texas. While thunderstorms -- and some severe potential -- will likely occur in the vicinity of these two features, risk appears too low to highlight with a 15% area at this time. For the remainder of the period, weak flow aloft is forecast across all but the Northeast/Great Lakes region, which should generally limit severe potential on the broader scale. As a blocking high develops over western North America and lingers through the medium range, eastern U.S. troughing will gradually evolve. While this increase in troughing -- and the magnitude of the upper flow field -- could lead to some increase in potential for severe weather through latter stages of the period, differences amongst the models suggest limited predictability of the pattern evolution. Read more CHECK UPDATE ZOOM GRAPHIC
SUNRISE AND SUNSET TIMES IN UTC (if you're not logged in to Google)
CHICAGO UTC-6 during CST (Central Standard Time, e.g., winter)
CHICAGO UTC-5 during CDT (Daylight Savings Time, e.g., summer)