Central High Plains Storms Poised for Upscale Growth, 80 MPH Winds — SevereWX

Central High Plains Storms Poised for Upscale Growth, 80 MPH Winds

Scattered thunderstorms are firing over high terrain from central Colorado into southeastern Wyoming this afternoon, setting the stage for severe weather as they intensify.

SPC's Mesoscale Discussion 1542 highlights how heating, upslope flow, and a weak mid-level disturbance are fueling these high-based storms. While moisture is limited near the Colorado foothills (dewpoints in the 40s), eastward-moving convection will tap into richer air, promoting gradual strengthening.

Key Threats:

• Severe wind gusts: Steep low-level lapse rates and deep boundary layers enable efficient downward momentum transport, with 65-80 mph gusts most probable. A couple of significant gusts are possible as storms upscale into linear clusters via cold pool mergers this evening.
• Isolated large hail: Steep mid-level lapse rates support 1-1.75 inch hail, especially from discrete storms, with better shear farther north enhancing the odds.

Deep westerly flow and elongating hodographs will aid organization. SPC pegs Severe Thunderstorm Watch odds at 80%, likely needed within 1-2 hours for NE/KS/CO/WY zones.

This setup echoes today's broader High Plains activity but focuses on clustering risks here. Monitor radar for evolution.

Preparedness: Review your severe weather plan, secure outdoor items, and have multiple alert sources ready. Stay safe out there.