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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.

Wednesday, June 9, 2021

SPC Jun 10, 2021 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0744 PM CDT Wed Jun 09 2021 Valid 100100Z - 101200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF WESTERN AND NORTHERN MONTANA... ...SUMMARY... Isolated severe thunderstorms are expected across portions of western and northern Montana tonight. ...MT... Extensive low clouds, aided in part by weak upslope flow, have held surface temperatures down across parts of the northern High Plains in the Great Falls vicinity. However, intense boundary-layer heating across eastern ID/WY has allowed deeply mixed boundary layer to spread across southern MT. Latest satellite imagery suggests festering cu field/deeper thermals over the Little Belts should lead to isolated thunderstorms that will then spread northeast into a region of higher moisture/buoyancy. Otherwise, scattered convection that is evolving from near MSO to west of CTB should strengthen some as it propagates east of the higher terrain. At this time it appears the corridor of most interest is from just west of LWT to east of HVR where instability and steep lapse rates appear more supportive of organized severe. ...Elsewhere... Strong diurnal heating proved instrumental in robust convection this afternoon across parts of the middle Atlantic, northern MN, and along the dryline in west Texas. A few storms linger in each of these regions but boundary-layer cooling should contribute to further stabilization, in addition to observed convective overturning, such that additional severe will be very localized this evening. ..Darrow.. 06/10/2021 Read more LIVE: