SPC AC 290731
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0231 AM CDT Fri May 29 2020
Valid 311200Z - 011200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE
NORTHERN/CENTRAL HIGH PLAINS...
Isolated severe thunderstorms may occur across the northern/central
High Plains Sunday afternoon and evening.
...North-central High Plains...
The region will largely be influenced by upper-level ridging,
although weak height falls may occur across parts of Montana on the
periphery of a shortwave trough spreading over the Canadian Rockies.
A modestly moist (50s F surface dewpoints) boundary layer will be
maintained to the east of an eastward-moving cold front across
Montana, and near/east of a lee trough extending southward across
the northern/central High Plains. Differential heating in the
vicinity of higher terrain and zones of modest convergence will
influence isolated thunderstorm development Sunday afternoon,
initially across eastern portions of Montana/Wyoming southward to
the Colorado Front Range. Moderate buoyancy and 30-40 kt effective
shear will support some high-based supercells/sustained multicells
capable of large hail and strong wind gusts.
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NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z