|Mesoscale Discussion 1112|
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Mesoscale Discussion 1112
NWS Storm Prediction Center Norman OK
0629 PM CDT Wed Jun 21 2017
Areas affected...Southern Louisiana eastward to the Florida
Panhandle and southwestern Alabama
Concerning...Tornado Watch 359...
Valid 212329Z - 220030Z
The severe weather threat for Tornado Watch 359 continues.
SUMMARY...Tornado watch 359 continues until 00Z. A new tornado
watch is being considered at this time.
DISCUSSION...A strongly sheared, weakly unstable environment
continues to support some threat for a tornado or two - especially
across southern Alabama where several northward-moving storms have
exhibited at least modest low-level rotation. Farther west,
convection has decreased in coverage in response to drier air aloft
migrating into the region from the south. It is currently unclear
whether storms can re-develop across the region. Higher-resolution
guidance suggests that storms may redevelop across south-central
Louisiana that may pose a tornado threat later tonight, although
this regime is currently uncertain.
Latest thinking is that a replacement tornado watch will be needed
in southern Alabama and the adjacent Florida Panhandle as convective
cells with rotation continue to move northward across the region.
This watch will be issued within the hour. Farther west, trends
will be monitored for possible redevelopment of convection closer to
the center of Cindy, which may possibly necessitate a watch for
portions of southern Louisiana later tonight.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 30979262 31309164 31478922 31468775 31438686 31298636
30908619 30428643 29848692 29538780 29128870 28918945
28859044 28899124 29089224 29269269 30029289 30719272
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