Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 140155
SWOMCD
SPC MCD 140154
MOZ000-ARZ000-MSZ000-LAZ000-TXZ000-OKZ000-140300-

Mesoscale Discussion 0249
NWS Storm Prediction Center Norman OK
0854 PM CDT Fri Apr 13 2018

Areas affected...much of northeastern into central and southern
AR...northern LA...northeast TX

Concerning...Tornado Watch 40...

Valid 140154Z - 140300Z

The severe weather threat for Tornado Watch 40 continues.

SUMMARY...The risk for severe thunderstorms and isolated tornadoes
will continue and extend beyond the 10pm CDT watch expiration time.
A combination of local watch extension-in-time and a new tornado
watch may be utilized.

DISCUSSION...A moist and moderately buoyant airmass resides ahead of
an elongated QLCS from east-central MO southwestward into the
Ark-La-Tex region and another convective line has developed over
east-central TX.  Both convective lines are moving east and will
continue to yield a risk for locally damaging winds and an isolated
tornado is possible with any supercell or persistent/strong
mesovortex embedded within the squall line.  Although low-level
shear is strongest over AR, the moist boundary layer co-located with
ample low-level shear farther south in northeast TX into LA, will
support a risk for a tornado or two as well.  The watch decisions
will likely be forthcoming during the next hour.

..Smith.. 04/14/2018

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

ATTN...WFO...PAH...MEG...JAN...LZK...SHV...FWD...

LAT...LON   31559210 31689553 33409497 36439214 36488990 34209076
            33929185 31559210




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