SPC MD 1640



MD 1640 CONCERNING TORNADO WATCH 427… FOR PORTIONS OF THE FL PANHANDLE…FAR SOUTHEASTERN AL…AND SOUTHWESTERN GA

MD 1640 Image

Mesoscale Discussion 1640
NWS Storm Prediction Center Norman OK
0626 PM CST Mon Nov 12 2018

Areas affected...Portions of the FL Panhandle...far southeastern
AL...and southwestern GA

Concerning...Tornado Watch 427...

Valid 130026Z - 130100Z

The severe weather threat for Tornado Watch 427 continues.

SUMMARY...Severe threat should continue to diminish this evening.
Additional downstream watch issuance is not expected.

DISCUSSION...A broken line of thunderstorms will continue eastward
across southwestern GA and the FL Panhandle this evening. 00Z
sounding from Tallahassee, FL shows a sharp inversion around 900 mb
with only weak (less than 500 J/kg) MLCAPE. As the low-level flow
across this region weakens and veers, convergence along/ahead of a
surface front should likewise diminish. With the loss of daytime
heating and the ongoing line of storms becoming increasingly
oriented parallel to southwesterly mid-level flow, the overall
severe threat will likely continue to diminish this evening.
Therefore, downstream watch issuance is not expected, and WW 427
will be allowed to expire as scheduled at 01Z.

..Gleason.. 11/13/2018

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...FFC...TAE...

LAT...LON   30218579 31908441 31858399 29988421 29608485 29548514
            29748542 29928548 30048565 30218579 

Read more



Source link

Editor

Leave a Reply

Your email address will not be published. Required fields are marked *