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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.

Thursday, October 7, 2021

SPC Oct 8, 2021 0100 UTC Day 1 Convective Outlook

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0742 PM CDT Thu Oct 07 2021 Valid 080100Z - 081200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM NORTHEAST NEVADA INTO SOUTHERN IDAHO...NORTHERN UTAH AND WESTERN WYOMING... ...SUMMARY... A few / isolated strong to severe storms with locally strong wind gusts and small to marginally severe hail will remain possible into mid evening across a portion of the Great Basin. ...Great Basin area... Scattered showers and thunderstorms are underway from northern NV through northern UT, southern ID into western WY. This activity is developing within a corridor of forcing for ascent associated with a mid-level vorticity maximum embedded within a modest southwesterly flow regime. The atmosphere is only marginally unstable with up to 500 J/kg MLCAPE. However, steep mid-level lapse rates and cool mid-level temperatures, along with 30-40 kt effective bulk shear are supporting a low-end threat for small to marginally severe hail and gusty winds with the stronger storms. Any remaining severe threat should gradually weaken by 03Z as the boundary layer stabilizes. ..Dial.. 10/08/2021 Read more LIVE: