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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, October 26, 2021

SPC Oct 27, 2021 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0732 PM CDT Tue Oct 26 2021 Valid 270100Z - 271200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PORTION OF SOUTH-CENTRAL KS...WESTERN/CENTRAL OK...AND NORTHWEST/NORTH-CENTRAL INTO SOUTHWEST TX... ...SUMMARY... Scattered severe thunderstorms capable of producing large hail, wind damage, and isolated tornadoes are expected across portions of Kansas, Oklahoma, and north/central Texas through the evening and continuing through the overnight hours. ...01Z Update... ...Central/Southern Plains... A strong shortwave trough continues to push eastward through the central and southern High Plains. An attendant surface low preceded this shortwave, with recent surface analysis placing this low over the western NE/KS border vicinity. A dryline extends from this low southward through western KS and into the far eastern TX Panhandle. A cold front also extends from this low, extending across far western KS into the central TX Panhandle. Current forecast thinking has not changed from the previous outlook, with the expectation that thunderstorms will develop along the cold front as it continues to move eastward into the more buoyant air mass across central KS southward across western/central OK and into central TX. Vertical shear will be quite strong, helping to support strong to severe storms once development occurs. A predominantly linear mode is anticipated, with strong wind gusts as the primary severe threat. Given the strength of the low-level shear, a few embedded tornadoes are possible as well. This severe threat is expected to last throughout the night as the storms spread eastward across south-central KS, OK, and north/central TX through early Wednesday morning. ..Mosier.. 10/27/2021 Read more LIVE: spc.noaa.gov