Central High Plains Storms Primed for Windy Upscale Growth — SevereWX

Thunderstorms bubbling up from the high terrain of southeastern Wyoming and central Colorado are set to push eastward into the central High Plains this afternoon and evening, packing risks for damaging wind gusts up to 80 mph and hail as large as 1.75 inches.

The Storm Prediction Center's Mesoscale Discussion 1558 highlights how southeasterly upslope flow and a subtle mid-level disturbance are fueling this convection. As storms move east under westerly flow aloft, steep low-level lapse rates and a dry, mixed boundary layer will promote evaporative cooling. This should lead to merging cold pools, fostering upscale growth into linear clusters or segments primed for severe downdraft winds.

A surface moisture gradient adds intrigue: dewpoints rise from the 40s-50s F near the foothills to the low-to-mid 60s F in western Kansas and Nebraska. With modest effective shear of 25-30 knots, organization may build gradually, but the severe potential is real enough for an 80% chance of a Severe Thunderstorm Watch later today.

Peak threats include wind gusts of 65-80 mph and hail of 1-1.75 inches. Affected areas span portions of Nebraska, Kansas, Colorado, and Wyoming—check the SPC graphic for precise lat/lon blocks.

Stay prepared: Monitor local NWS updates, have a severe weather plan, secure outdoor items, and seek shelter if storms approach. Safety first as these High Plains wind machines rev up.