SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CDT Fri Oct 10 2025 Valid 101630Z - 111200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE LOWER COLORADO RIVER VALLEY... ...SUMMARY... A couple of severe storms may occur across the Lower Colorado River Valley vicinity this afternoon into evening. ...Lower Colorado River Valley/southern Great Basin... Height falls/flow aloft will gradually increase late today as the West Coast upper trough amplifies and spreads southeastward toward the Great Basin. Preceding it, rich low-level moisture is present across the Lower Colorado River Valley early today, with this moisture continuing to spread northward. Modest destabilization should occur this afternoon particularly on the western periphery of residual early day precipitation and cloud cover across Arizona into southern Utah. At least weak instability, combined with increasing mid-level flow with the approach of the upper trough/low, may support a potentially severe storm or two including a couple of transient supercells. ..Guyer/Jewell.. 10/10/2025
