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
Read morefrom SPC Forecast Products http://ift.tt/JfmJ0R
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