SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0636 AM CST Wed Jan 28 2026 Valid 281300Z - 291200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not forecast for today. ...Synopsis... Early-morning satellite imagery shows a pair of shortwave troughs within in the cyclonic flow covering the central and eastern CONUS. The southernmost shortwave is currently progressing southeastward into the Lower MS Valley, with this southeastward motion expected to persist throughout the day. This evolution takes the wave across the north-central and eastern Gulf this afternoon/evening, and across FL by early tomorrow morning. The northern shortwave is moving southeastward over the Upper Great Lakes, and continued southeastward progress will take this wave through the middle/upper OH Valley and off the northern Mid-Atlantic coast tonight. Dry and stable conditions associated with an arctic airmass will be in place ahead of these shortwaves, limiting low-level moisture and precluding thunderstorm development. Another shortwave trough is currently moving eastward across the interior Pacific Northwest and northern Great Basin. This eastward/southeastward progression should continue, taking the wave through the northern/central Rockies and into the central Plains while also dampening the shortwave ridging proceeding it. Precipitation will be possible in association with this shortwave during the day and across the central and northern Rockies. However, little to no instability is forecast, and thunderstorms appear unlikely. ..Mosier/Broyles.. 01/28/2026
