Severe Storm Outlook Narrative (AC)
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ACUS03 KWNS 270717
SWODY3
SPC AC 270717

Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0217 AM CDT Thu Jul 27 2017

Valid 291200Z - 301200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF THE ATLANTIC AND GULF COAST REGIONS...

...SUMMARY...
A few severe storms will be possible Saturday across portions of the
Atlantic and Gulf coastal states.

...Synopsis...
Some additional amplification of the upper flow field will likely
occur Saturday, as the continued southeastward digging of the
eastern U.S. trough occurs in tandem with strengthening of the
western U.S. ridge.  At the surface, high pressure will prevail
across large portions of the country, in the wake of a cold front
moving steadily across/off the Gulf and Atlantic Coast areas through
the period.

...Southern Atlantic coastal areas west into the central Gulf Coast
region...
A zone of ongoing thunderstorms is expected along and near the
advancing cold front from the mid Atlantic region soutehast into the
central Gulf Coast states at the start of the period.  While
hindering heating/destabilization in parts of the area, some
afternoon increase in storm coverage/intensity will likely occur
through the day, as local destabilization occurs within portions of
the pre-frontal warm sector.  With a cyclonic belt of enhanced
(generally 30 to 40 kt) mid-level flow to reside atop the surface
frontal zone, a few organized/locally severe storms will be
possible, capable of producing gusty/damaging winds in a few
locales.  Risk should diminish during the evening due to a
combination of diurnal stabilization, and the front moving steadily
off the Atlantic and Gulf coasts.

..Goss.. 07/27/2017

$$


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