SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0229 AM CDT Wed Jul 13 2022
Valid 151200Z - 161200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE CENTRAL AND NORTHERN HIGH PLAINS...
...SUMMARY...
Isolated severe storms, associated with strong wind gusts and hail,
will be possible across parts of the northern High Plains on Friday.
Other storms with marginally severe wind gusts will also be possible
in parts of the central High Plains.
...Central and Northern High Plains...
A large area of high pressure will be in place across much of the
southwestern and central United States on Friday. On the northern
periphery of the anticyclone, westerly mid-level flow will exist
across the northern Rockies and northern High Plains. Subtle
perturbations in the flow will move eastward across the Northern
Rockies on Friday. This along with surface heating will support
convective development in the higher terrain of western and central
Montana around midday. This convection will move eastward into the
northern High Plains. Large temperature-dewpoint spreads, exceeding
50 degrees F in some locations, are forecast across parts of eastern
Montana during the late afternoon. Line segments that form in this
environment during the late afternoon should associated with
marginally severe winds. The isolated severe threat could continue
eastward into the Dakotas during the evening, with any line that can
remain organized.
Further south into the central High Plains, thunderstorms will also
develop and move eastward into the lower elevations during the
afternoon. Although low-level lapse rates will be steep, instability
is forecast be weaker than further to north. This should keep any
wind-damage threat very isolated during the late afternoon.
..Broyles.. 07/13/2022
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