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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.

Friday, March 18, 2022

SPC Mar 18, 2022 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0221 AM CDT Fri Mar 18 2022 Valid 201200Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Appreciable severe-weather potential is not evident Sunday across the CONUS. ...Discussion... An eastern U.S. trough -- aligned roughly along the Appalachians at the start of the period -- will move steadily eastward and eventually/largely offshore, lingering only in a negatively tilted manner over northern New England. A surface cold front associated with this feature will likely already have moved offshore by Sunday morning, with the exception of the trailing portion of the boundary moving southward across Florida. Showers and a few thunderstorms are expected ahead of the front across Florida, but at this time severe-weather potential appears very low. Meanwhile, a strong trough will continue to dig/advance across western Canada/the western U.S./northern Mexico through the period. While low-level southeasterly flow will begin later in the period across Texas, low-level destabilization is expected to remain insufficient, remaining beneath a capping inversion. As such, storm development is not expected through the end of the period within the gradually evolving warm sector ahead of the advancing surface low/front, which should reach the southern High Plains late in the period. Showers and widely scattered storms will however accompany the trough as it crosses the Intermountain West. Isolated/elevated storms may also develop overnight, from the Texas Panhandle/south Plains vicinity northeastward across the Plains, within a broad zone of increasing QG ascent ahead of the trough. ..Goss.. 03/18/2022 Read more CHECK UPDATE ZOOM GRAPHIC
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