Temps | Gusts | WU KORD KPWK

CLICK for this month's BIG night sky ...




Cardinal SAT


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, July 8, 2021

SPC Jul 8, 2021 0730 UTC Day 3 Severe Thunderstorm Outlook

SPC 0730Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0212 AM CDT Thu Jul 08 2021 Valid 101200Z - 111200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL AND SOUTHERN PLAINS INTO THE MID-MS VALLEY... ...SUMMARY... Strong to severe thunderstorms capable of damaging wind gusts are possible on Saturday across parts of the central and southern Plains into the Middle Mississippi Valley. ...Central/Southern Plains to Mid-MS Valley... Severe potential will increase across parts of OK/KS into southern IL on Saturday as the northern Plains upper trough develops south/southeast toward the Ozark Plateau. Moderate northwesterly mid/upper flow will overspread the region ahead of a surface cold front. The front is forecast to extend from southwest Iowa into southwest KS Saturday morning and will progress southeast across MO/KS/OK during the afternoon/evening. A broad area of upper 60s to near 70 F surface dewpoints is expected across the warm sector ahead of the front, but ongoing convection Saturday morning across parts of IA/MO/KS and cloud cover in a strong warm advection regime will have some impact on destabilization and where greater severe potential develops. Currently, a corridor of greater instability appears likely across parts of southern KS into OK and parts of MO/southern IL. Convection is expected to develop during the afternoon near the southeastward-advancing cold front across KS, and either redevelop or become reinvigorated across parts of MO. Clusters/bowing segments will be favored along the front, and as a low level jet increases during the evening, upscale development into an MCS with accompany damaging winds will be possible. Uncertainty related to ongoing convection at the beginning of the period and position of any related outflow boundaries and the cold front will preclude higher probabilities at this time, but an upgrade to Slight risk may be needed in subsequent outlooks. ..Leitman.. 07/08/2021 Read more LIVE: