Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 272326
SWOMCD
SPC MCD 272326
GAZ000-ALZ000-280030-

Mesoscale Discussion 0576
NWS Storm Prediction Center Norman OK
0626 PM CDT Thu Apr 27 2017

Areas affected...southeastern Alabama into central Georgia

Concerning...Tornado Watch 169...

Valid 272326Z - 280030Z

The severe weather threat for Tornado Watch 169 continues.

SUMMARY...Severe weather potential is expected to become
increasingly negligible through 8-11 pm EDT .  A new severe weather
watch is not anticipated, and tornado watch 169 may be allowed to
expire as previously scheduled at 8 pm EDT.

DISCUSSION...Thunderstorm development persists from near Troy AL
through the Columbus GA area into areas south of Peach Tree City Ga.
 This is occurring within a lingering corridor of moderate boundary
layer instability, east southeast of a stalling/weakening frontal
zone.  Localized enhanced surface convergence and weak lower/mid
tropospheric warm advection may be contributing to forcing for this
activity, and vertical shear near a 30 kt southwesterly 850 mb jet
axis (beneath 40-50 kt westerly/cyclonic 500 mb flow) remains
strong.  However, diurnal boundary layer cooling coupled with a
warming mid-level environment is expected to result in diminishing
convective trends across the region through 00-03Z.

..Kerr.. 04/27/2017

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

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

LAT...LON   32168591 33188449 33648383 33488240 32468383 31528580
            31398641 31838642 32168591



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