SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1239 AM CDT Fri Oct 09 2020

Valid 091200Z - 101200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
SOUTH-CENTRAL/SOUTHEAST LOUISIANA INTO FAR SOUTHERN MISSISSIPPI...

...SUMMARY...
A few tornadoes are possible across parts of
south-central/southeastern Louisiana and far southern Mississippi
today and tonight.

...South-central and Southeast Louisiana/Far Southern Mississippi...

The National Hurricane Center is forecasting Hurricane Delta to
approach the southwestern Louisiana coast this afternoon and move
onshore around 00Z/Saturday. Rainbands with moderate to heavy
rainfall will overspread southern Louisiana today and move into
southern Mississippi this evening. RAP forecast soundings late this
afternoon in southeast Louisiana (to the northeast of Delta's
center) have 0-1 km shear in the 40 to 50 kt range. Winds at the
surface are easterly but veer to the south-southeast in the
mid-levels. The strong low-level shear should will support rotating
storms with cells that remain semi-discrete in the rainbands of
Delta. A few tornadoes and isolated damaging wind gusts appear
likely with storms that exhibit supercell characteristics. The
tornado threat should impact the south-central coast of Louisiana
first and then expand eastward to near New Orleans in the afternoon.
The tornado threat is forecast to spread northeastward this evening
into areas north of Lake Pontchartrain and far southern Mississippi.
A tornado threat could persist into the overnight period as Delta
weakens to a tropical storm and moves further inland across the
lower Mississippi Valley.

..Broyles/Moore.. 10/09/2020

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