SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0642 AM CST Tue Jan 27 2026 Valid 271300Z - 281200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are unlikely today. ...Synopsis... Several shortwave troughs are forecast to progress eastward today within the cyclonic flow aloft covering much of the central and eastern CONUS. At the same time, upper ridging will move eastward across the western CONUS to the Intermountain West and a strong shortwave trough will move across the Pacific Northwest. This evolution will lead to a modestly amplified trough/ridge/trough pattern over the CONUS by early tomorrow. Even with this relatively progressive pattern, the extensive and cold airmass in place over much of the CONUS will promote offshore trajectories and cold/stable sensible weather. Strongest convection today is anticipated with a frontal band attendant to the Pacific Northwest shortwave trough. However, this convection will still be too shallow to produce lightning. ..Mosier/Broyles.. 01/27/2026
