|Mesoscale Discussion 1252|
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Mesoscale Discussion 1252
NWS Storm Prediction Center Norman OK
0235 AM CDT Fri Jul 07 2017
Areas affected...Portions of southwest into south-central Lower
Concerning...Severe potential...Watch unlikely
Valid 070735Z - 070930Z
Probability of Watch Issuance...20 percent
SUMMARY...Locally strong/damaging wind gusts will remain possible
into the early morning across portions of southwest into
south-central Lower Michigan. WW issuance is unlikely.
DISCUSSION...At 0710Z, mosaic radar imagery showed a band of storms
extending from Kent to Allegan counties, moving to the
east-southeast around 50 kt. This band of storms should continue to
move to the east-southeast along a moderate instability gradient.
At 720Z, GRR WSR-88D velocity data indicated wind speeds of 50-60 kt
at 350-400 fl above-radar-level spreading across southwest Kent
County. Despite some surface-based inhibition that would limit
stronger wind gusts from reaching the surface, reported severe wind
gusts with this band of storms and aforementioned kinematics suggest
locally strong/damaging wind gusts remain possible into
south-central Lower Michigan. Convection/storms developing east of
the aforementioned fast-moving band of storms should convectively
overturn the downstream air mass and eventually result in a
deceleration of the band of storms.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 43178536 43068425 42868363 42128375 42048450 42298560
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