BBS:      TELESC.NET.BR
Assunto:  MESO: Nws Weather Prediction Center College Park Md
De:       COD Weather Processor
Data:     Tue, 28 Apr 2026 15:25:43 +0000
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AWUS01 KWNH 281525
FFGMPD
ALZ000-MSZ000-282030-

Mesoscale Precipitation Discussion 0145
NWS Weather Prediction Center College Park MD
1124 AM EDT Tue Apr 28 2026

Areas affected...north-central MS into central AL

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

Valid 281520Z - 282030Z

SUMMARY...Training and repeating thunderstorms are expected for
portions of north-central MS into central AL through the early
afternoon. Peak hourly rainfall of 1-2 inches will occur (locally
higher values possible) within areas of training with localized
flash flooding possible.

DISCUSSION...Radar imagery from 1510Z across northern MS and
north-central AL showed scattered thunderstorms located north of
an outflow boundary that stretched from near GWO to TCL to EUF.
The western end of the ouflow boundary has been nearly stationary
over the past few hours and 0-1 km AGL winds were from the SSW at
15-20 kt, overrunning the outflow boundary and allowing for some
very brief training and peak hourly rainfall up to ~1 inch at
times. Aloft, flow was diffluent, helping to support broader scale
ascent across the region. 12Z soundings from FFC to BMX to JAN
showed that MUCAPE varied across the South, with MUCAPE values
increasing toward the west with 1500-2000 J/kg at JAN.

Recent forecasts from the RAP do not show any significant changes
to elevated instability values from MS into AL through 21Z but do
show the low level flow weakening and veering a bit. Therefore, it
is unclear how much upstream development will continue but there
will continue to be some degree of overrunning and likely upstream
thunderstorm development for at least the next 2-4 hours, aided by
subtle impulses aloft within the WSW mid-level flow. There will be
the potential for repeating cells and training along and north of
the outflow boundary with hourly rainfall of 1-2 inches and
localized 3 to 4+ inch totals within 2 to 3 hours, possibly
leading to localized flash flooding. Largely dry antecedent
conditions may limit any flash flooding to urban or otherwise
sensitive locations.

Otto

...Please see https://urldefense.com/v3/__http://www.wpc.ncep.noaa.gov__;!!=
DZ3fjg!4vGPCOKiulQUd15Il53z5GxqSm1yeN7rH_TetrmvIGmf_YUMQdaF-iv9DWHNJB-L9jAs=
RDtpHjlAvUBA874txxJ0VI0$  for graphic product...

ATTN...WFO...BMX...HUN...JAN...MEG...MOB...

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

LAT...LON   34488940 34228763 33688616 32828591 32308649=20
            32258763 32918901 33409048 34089045=20

=3D =3D =3D
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