Mesoscale Discussion 0229
NWS Storm Prediction Center Norman OK
0137 AM CDT Sat Apr 07 2018
Areas affected...Parts of southern Louisiana and adjacent upper
Texas coastal areas
Concerning...Severe Thunderstorm Watch 38...
Valid 070637Z - 070800Z
The severe weather threat for Severe Thunderstorm Watch 38
continues.
SUMMARY...Lingering severe weather potential, mainly a risk for
potentially damaging wind gusts, is generally becoming confined to
portions of southwestern and south central Louisiana through 2-4 AM
CDT.
DISCUSSION...Intense segment of ongoing larger-scale convective
system has taken on an increasing bowing structure in radar
reflectivity data, and is now surging southeastward at 35+ kt,
toward western/central Louisiana coastal areas. This is being aided
by strong southeasterly inflow emanating from a moist and
potentially unstable boundary layer.
During the next hour or two, the strength of this inflow may begin
to weaken, as models suggest that the stronger low-level jet will
begin to shift east of the Mississippi River with the primary weak
frontal wave. However, as convection continues to progress into an
increasingly moist boundary layer, associated instability may
maintain strength into coastal areas through 08-09Z, accompanied by
a risk for potentially damaging wind gusts.
..Kerr.. 04/07/2018
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LIX...LCH...
LAT...LON 30769310 30719223 30129126 29359135 29549280 29839360
30369419 30429349 30769310
Read morefrom SPC Forecast Products http://www.spc.noaa.gov/products/md/md0229.html
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