099
AWUS01 KWNH 180121
FFGMPD
SCZ000-FLZ000-GAZ000-ALZ000-180615-

Mesoscale Precipitation Discussion 0761
NWS Weather Prediction Center College Park MD
920 PM EDT Fri Jul 17 2026

Areas affected...Southern Georgia, Alabama and South Carolina into
Florida Panhandle

Concerning...Heavy rainfall...Flash flooding possible

Valid 180119Z - 180615Z

SUMMARY...Multi-cell thunderstorm clusters with torrential
rainfall rates to 3"/hr will continue to cause localized flash
flooding across southern Georgia into southern Alabama and South
Carolina and with the Florida Peninsula into the overnight.

DISCUSSION...As of 01Z...Multi-cell clusters over southern South
Carolina and Georgia are generally tracking west under a zonal
upper ridge over TN/NC. An additional cluster is tracking south
over southern AL on outflow while outflow is driving particularly
heavy rain west along the Florida Big Bend. Instability corridors
are also driving this activity with 2500 J/kg MLCAPE from central
SC arcing across southern GA/AL. Activity is on a convergence
course for the GA/FL/AL border junction, though recent activity
struggled to take root in that area. PW of 2 to 2.2" is also
present along this corridor with hourly rainfall up to 3"/hr per
regional NEXRAD.

Recent HRRR runs are underdoing all of activity with the RRFS
struggling outside of southeast GA. The ingredients point to
continued heavy thunderstorm development, so continued localized
flash flooding can be expected to continue into the overnight.

Jackson

...Please see www.wpc.ncep.noaa.gov for graphic product...

ATTN...WFO...BMX...CAE...CHS...FFC...JAX...MOB...TAE...

ATTN...RFC...ALR...NWC...

LAT...LON   34058099 33798024 32598128 32108187 31248235
            30228497 31088693 32388724 33138616 32988367
            33458221