Mesoscale Discussion 0596
NWS Storm Prediction Center Norman OK
0328 PM CDT Sat Apr 29 2017
Areas affected...southeast Missouri through southern Illinois and
southwest Indiana
Concerning...Severe potential...Watch possible
Valid 292028Z - 292230Z
Probability of Watch Issuance...40 percent
SUMMARY...Storms will pose some threat for isolated damaging wind as
they continue through eastern Missouri, southern Illinois and
southwest Indiana into the early evening.
DISCUSSION...Line of storms continues from near St. Louis through
northwest AR. The northern portion of the line is moving more
rapidly at around 40 kt, is the most organized, and appears to be
forced by the circulation accompanying a progressive MCV. A warm
front continues to lift north through the OH valley downstream from
the line with dewpoints rising to around 70 F and temperatures in
the 80s in warm sector. Storms may continue to pose a risk for
damaging wind as they interact with destabilizing boundary layer
next few hours and where eastern branch of the low level jet will
continue to support strong convergence and moist and unstable
inflow. A limiting factor has been tendency for upper ridge to build
which has resulted in weaker flow above 500 mb.
..Dial/Weiss.. 04/29/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LMK...IND...PAH...ILX...LSX...
LAT...LON 37599032 38309009 39128992 39198848 39168691 38048696
37478858 37599032
Read morefrom SPC Forecast Products http://ift.tt/JHA72s
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