MARCO 0500 PM ADVISORY

 

000
WTNT34 KNHC 242046
TCPAT4

BULLETIN
Tropical Storm Marco Advisory Number  19
NWS National Hurricane Center Miami FL       AL142020
400 PM CDT Mon Aug 24 2020

...MARCO EXPECTED TO CONTINUE TO PRODUCE GUSTY WINDS AND HEAVY
RAINFALL OVER PORTIONS OF THE NORTHERN GULF COAST THROUGH THIS
EVENING...


SUMMARY OF 400 PM CDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...29.0N 88.9W
ABOUT 15 MI...20 KM ESE OF THE MOUTH OF THE MISSISSIPPI RIVER
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...NW OR 320 DEGREES AT 7 MPH...11 KM/H
MINIMUM CENTRAL PRESSURE...1008 MB...29.77 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

There are no coastal watches or warnings in effect.

Gusty winds, heavy rainfall, and lingering coastal flooding are
expected from Marco along portions of the Gulf Coast through this
evening. For information on these hazards see products from your
local National Weather Service office.

Tropical cyclone wind and surge watches have been issued for
portions of the U.S. Gulf Coast for Tropical Storm Laura.

For storm information specific to your area, including possible
inland watches and warnings, please monitor products issued by your
local National Weather Service forecast office.


DISCUSSION AND OUTLOOK
----------------------
At 400 PM CDT (2100 UTC), the center of Tropical Storm Marco was 
located near latitude 29.0 North, longitude 88.9 West.  Marco is 
moving toward the northwest near 7 mph (11 km/h), a turn to the 
west-northwest and a slight increase in forward speed is expected 
to occur tonight. On the forecast track, Marco will move inland 
over southeastern Louisiana tonight, and across southern Louisiana 
on Tuesday. 

Maximum sustained winds are near 40 mph (65 km/h) with higher gusts.
Weakening is expected, and Marco is forecast to become a
tropical depression tonight and degenerate to a remnant low on
Tuesday.

Tropical-storm-force winds extend outward up to 80 miles (130 km) 
from the center.  A National Ocean Service weather station located 
on Petit Bois Island, Mississippi recently reported a wind gust to 
38 mph (61 km/h).

The estimated minimum central pressure is 1008 mb (29.77 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Wind gusts to tropical storm force are possible over the
coastal sections of southeastern Louisiana and Mississippi through
this evening.

RAINFALL:  Marco is expected to produce additional rainfall 
accumulations of 2 to 4 inches with additional isolated totals of 7 
inches across portions of the north-central Gulf coast and 
southeastern United States through Wednesday.   Rain totals related 
to Marco near Apalachicola, Florida reached as high as 11.81 inches 
on Sunday per a CoCoRaHS report.  The additional rainfall may result 
in areas of flash, urban and small stream flooding along the same 
area.

SURF:  Swells generated by Marco are likely to affect portions of
the northern Gulf Coast for the next day or so. These swells
are likely to cause life-threatening surf and rip current
conditions.  Please consult products from your local weather office.

TORNADOES:  A couple of tornadoes are possible late this afternoon 
through tonight across the Florida Panhandle, southern Georgia, far 
southern Alabama, and far southern Mississippi. 


NEXT ADVISORY
-------------
Next complete advisory at 1000 PM CDT.

$$
Forecaster Latto