SPC MD 1388


MD 1388 Image

Mesoscale Discussion 1388
NWS Storm Prediction Center Norman OK
0703 PM CDT Mon Aug 03 2020

Areas affected...Eastern South Carolina...Eastern North Carolina

Concerning...Tornado Watch 413...

Valid 040003Z - 040200Z

The severe weather threat for Tornado Watch 413 continues.

SUMMARY...The tornado threat will increase along the coasts of
eastern South Carolina and eastern North Carolina early this
evening. As the tornado threat moves northward over the next couple
of hours, tornado watch issuance will be needed across parts of
eastern North Carolina.

DISCUSSION...The National Hurricane Center currently places Tropical
Storm Isaias about 60 statute miles east of Charleston, South
Carolina. Isaias is forecast to become a Hurricane and make landfall
near Wilmington, North Carolina later evening. A distinct band of
heavy rainfall surrounds the center of Isaias and is affecting
southern North Carolina and eastern South Carolina at this time. The
band in far southern North Carolina consists of several discrete
thunderstorms from the Wilmington area extending offshore about 100
statute miles. The latest WSR-88D VWP from Morehead City, North
Carolina shows east-southeasterly surface winds veering to the
south-southeast at 2 km above ground-level. This is creating strong
low-level shear with 0-3 km storm relative helicities around 200
m2/s2. As the strong winds associated with Isaias move northward,
low-level shear will increase. This will make conditions
increasingly favorable for tornadoes from far eastern South Carolina
into eastern North Carolina.

..Broyles.. 08/04/2020

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


LAT...LON   34077646 34857534 35417513 35837534 36227625 36307693
            36327747 36277784 35847840 34877904 34117940 33537963
            33247968 32977968 32857949 32837904 32947853 33457746

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