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Tropical Storm Delta Intermediate Advisory Number 22A
NWS National Hurricane Center Miami FL AL262020
100 AM CDT Sat Oct 10 2020
...DELTA NOW A TROPICAL STORM...
...TROPICAL STORM CONDITIONS AND HEAVY RAINS OCCURRING OVER MUCH OF
SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION
ABOUT 15 MI...25 KM ESE OF ALEXANDRIA LOUISIANA
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...NNE OR 25 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...985 MB...29.09 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY:
The Hurricane Warning from High Island Texas to Morgan City
Louisiana has been replaced with a Tropical Storm Warning.
The Storm Surge Warning has been discontinued from Port Fourchon to
Mouth of the Pearl River, Louisiana including Lake Borgne.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Warning is in effect for...
* Cameron to Port Fourchon, Louisiana including Vermilion Bay.
A Tropical Storm Warning is in effect for...
* High Island Texas to the mouth of the Pearl River,
including New Orleans
* Lake Pontchartrain and Lake Maurepas
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 100 AM CDT (0600 UTC), the center of Tropical Storm Delta was
located near latitude 31.2 North, longitude 92.3 West. Delta is
moving toward the north-northeast near 15 mph (24 km/h), and this
motion is expected to continue through the morning. A motion toward
the northeast is expected this afternoon through Sunday night. On
the forecast track, the center of Delta should move across central
and northeastern Louisiana this morning and across northern
Mississippi and into the Tennessee Valley later today and Sunday.
Maximum sustained winds have decreased near 60 mph (95 km/h) with
higher gusts. Continued weakening is forecast, and Delta should
become a tropical depression later today.
Tropical-storm-force winds extend outward up to 160 miles (260 km).
A wind gust of 68 mph (110 km/h) was recently reported at LSU Tiger
Stadium in Baton Rouge, Louisiana. Wind gusts of 55 mph (89 km/h)
were recently reported at Adams County airport in Natchez,
Mississippi and in Lacassine, Louisiana, and a gust to 59 mph (95
km/h) was just reported in Monroe, Louisiana.
The estimated minimum central pressure based on surface
observations is 985 mb (29.09 inches).
HAZARDS AFFECTING LAND
Key messages for Delta can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT1, WMO header WTNT41
KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT1.shtml.
STORM SURGE: The combination of a dangerous storm surge and the
tide will cause normally dry areas near the coast to be flooded by
rising waters moving inland from the shoreline. The water could
reach the following heights above ground somewhere in the indicated
areas if the peak surge occurs at the time of high tide...
Rockefeller Wildlife Refuge, LA to Morgan City, LA including
Vermilion Bay...4-6 ft
Cameron, LA to Rockefeller Wildlife Refuge, LA...2-4 ft
Morgan City, LA to Port Fourchon, LA...2-4 ft
Port Fourchon, LA to the AL/FL border including Lake Borgne, Lake
Pontchartrain, Lake Maurepas and Mobile Bay...1-3 ft
Port O'Connor, TX to Cameron, LA including Galveston Bay, Sabine
Lake, and Calcasieu Lake...1-3 ft
Surge-related flooding depends on the relative timing of the surge
and the tidal cycle, and can vary greatly over short distances.
For information specific to your area, please see products issued
by your local National Weather Service forecast office.
WIND: Tropical storm conditions will continue within portions of the
tropical storm warning area through the morning.
RAINFALL: Through Saturday, Delta is expected to produce 5 to 10
inches of rain, with isolated maximum totals of 15 inches, from
southwest into central Louisiana. These rainfall amounts will lead
to significant flash, urban, small stream flooding, along with minor
to major river flooding.
For extreme eastern Texas into northern Louisiana, southern
Arkansas, and western Mississippi, Delta is expected to produce 3 to
6 inches of rain, with isolated maximum totals of 10 inches. These
rainfall amounts will lead to flash, urban, small stream, and
isolated minor river flooding.
As the remnants of Delta move farther inland, 1 to 3 inches of rain,
with locally higher amounts, are expected in the Tennessee Valley
and Mid Atlantic this weekend. There is a potential for 3 to 6
inches in the Southern Appalachians, which could lead to isolated
flash, urban, and small stream flooding.
TORNADOES: A few tornadoes are possible early this morning over
southern portions of Louisiana and Mississippi, and over Alabama,
central and eastern Mississippi, southern Tennessee and the western
Florida Panhandle on Saturday.
SURF: Swells from Delta are still affecting portions of the
northern and western Gulf coast. These swells are likely to cause
life-threatening surf and rip current conditions. Please consult
products from your local weather office.
Next complete advisory at 400 AM CDT.