SPC 0600Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1145 PM CDT Fri Sep 26 2025 Valid 281200Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for severe thunderstorms appears negligible across the U.S. Sunday through Sunday night. ...Discussion... Latest model output indicates little change from prior runs concerning the large-scale pattern evolution through this period. It still appears that amplified troughing within the mid-latitude westerlies will continue to slowly advance inland of the North American Pacific coast. As this occurs, downstream ridging across the Canadian Prairies likely will become more amplified, while flow farther east trends broadly cyclonic across the eastern Canadian provinces through the northwestern Atlantic. Within the southern mid- and subtropical latitudes to the south and east of this regime, shorter wavelength developments within generally weak flow remain more unclear due to model spread. However, broad, weak mid-level troughing may continue to shift east-northeast of the lower Colorado Valley through the southern Rockies, while large-scale weak mid-level troughing lingers across the Southeast, to the southeast of developing high over the Midwest. At the same time, a pair of evolving tropical cyclones may continue to progress west-northwestward across parts of the southwestern Atlantic through Bahamas vicinity, to the southwest of a notable high centered near Bermuda. Similar to Saturday, due to generally weak deep-layer mean wind fields and rather modest to weak diurnal destabilization, the risk for severe thunderstorms across the U.S. appears negligible. However, scattered afternoon and evening thunderstorm development appears probable across parts of the Intermountain West and Rockies, as well as across parts of the Southeast. ..Kerr.. 09/27/2025
