Severe Storm Outlook Narrative (AC)
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000
ACUS01 KWNS 171621
SWODY1
SPC AC 171620

Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
1020 AM CST Sun Dec 17 2017

Valid 171630Z - 181200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS COASTAL
SOUTHEAST LOUISIANA...

...SUMMARY...
A marginal risk of severe weather exists near the southeast
Louisiana coast.

...Southeast Louisiana and nearby Gulf Coast...
In the wake of a weakening shortwave trough over the Midwest, the
region will be increasingly influenced by gradually rising
heights/NVA the remainder of the day. A composite band of
convection, which includes a few embedded thunderstorms, extends
from southwest AL southwestward into far southeast MS and coastal
southeast LA late this morning.

The east-northeastward movement of this convection will generally
tend to outpace inland moistening and destabilization with a richer
maritime air mass remaining offshore. This scenario, along with a
continued weakening and veering of 2-3 km AGL winds, should
considerably limit today`s severe potential, although a few strong
storms will nonetheless remain possible this afternoon immediately
near the coast.

..Guyer/Gleason.. 12/17/2017

$$


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