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Cardinal SAT


Weather conditions on bar directly above are near Lakefront. Tabs under Moon Phases refer to O'Hare (official).

Archives for SPC Convective outlook are updated daily with a live map a the beginning of the article. Touch or click map to get possible update, and follow link at end of article for referral to NOAA/NWS Storm Prediction Center. Archives for Chicago's hourly weather data were updated 24-48 hours after end of each day prior to Dec. 2020.

Tuesday, November 16, 2021

SPC Nov 16, 2021 1730 UTC Day 2 Convective Outlook

SPC 1730Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Tue Nov 16 2021 Valid 171200Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms appear unlikely across the contiguous United States on Wednesday. ...Discussion... As an upper low moves eastward across southern portions of the Canadian Prairie into Ontario, broader cyclonic flow/troughing south of this feature will shift across the central third of the U.S. through the period. As this feature advances, so will an associated surface cold front -- initially forecast to extend from the Upper Great Lakes (at the triple point of a southern Manitoba occluded low) southwestward to the southern Plains. As this front progresses eastward into the evening, modest low-level theta-e advection across the lower Mississippi Valley and vicinity may provide sufficient -- mainly elevated -- instability to support development of a few thunderstorms, within a broader area of frontal shower activity. Weak instability however should preclude any severe risk. A few thunderstorms may also spread northward into southern Florida overnight, but again -- severe storms are not expected. ..Goss.. 11/16/2021 Read more LIVE: spc.noaa.gov