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Tropical Storm Barry Intermediate Advisory Number 7A
NWS National Hurricane Center Miami FL AL022019
100 AM CDT Fri Jul 12 2019
...BARRY CRAWLING WESTWARD WITH LITTLE CHANGE IN STRENGTH...
...DANGEROUS STORM SURGE, HEAVY RAINS, AND WINDS CONDITIONS
EXPECTED ACROSS THE NORTH-CENTRAL GULF COAST...
SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION
ABOUT 80 MI...130 KM SSW OF THE MOUTH OF THE MISSISSIPPI RIVER
ABOUT 140 MI...220 KM SE OF MORGAN CITY LOUISIANA
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 3 MPH...6 KM/H
MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES
WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY...
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
A Hurricane Warning is in effect for...
* Intracoastal City to Grand Isle
A Tropical Storm Warning is in effect for...
* Mouth of the Pearl River to Grand Isle
* Lake Pontchartrain and Lake Maurepas including metropolitan New
* Intracoastal City to Cameron
A Storm Surge Warning is in effect for...
* Intracoastal City to Shell Beach
A Storm Surge Watch is in effect for...
* Shell Beach to the Mississippi/Alabama border
* Lake Pontchartrain
A Hurricane Watch is in effect for...
* Mouth of the Mississippi River to Grand Isle
* Intracoastal City to Cameron
A Tropical Storm Watch is in effect for...
* East of the Mouth of the Pearl River to the Mississippi/Alabama
A Hurricane Warning means that hurricane conditions are expected
somewhere within the warning area. A warning is typically issued
36 hours before the anticipated first occurrence of
tropical-storm-force winds, conditions that make outside
preparations difficult or dangerous. Preparations to protect life
and property should be rushed to completion.
A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.
A Storm Surge Warning means there is a danger of life-threatening
inundation from rising water moving inland from the coastline
during the next 36 hours in the indicated locations. For a
depiction of areas at risk please see the National Weather
Service Storm Surge Watch/Warning Graphic available at
hurricanes.gov. This is a life-threatening situation. Persons
located within these areas should take all necessary actions to
protect life and property from rising water and the potential for
other dangerous conditions. Promptly follow evacuation and other
instructions from local officials.
A Storm Surge Watch means there is a possibility of life-
threatening inundation from rising water moving inland from the
coastline in the indicated locations during the next 48 hours.
A Hurricane Watch means that hurricane conditions are possible
within the watch area. A watch is typically issued 48 hours
before the anticipated first occurrence of tropical-storm-force
winds conditions that make outside preparations difficult or
A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area generally within 48 hours.
Interests elsewhere along the Gulf Coast from the Upper Texas Coast
to the Florida Panhandle should monitor the progress of this system.
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 Barry was
located near latitude 28.0 North, longitude 89.8 West. Barry is
moving toward the west near 3 mph (6 km/h). A slow west-
northwestward to northwestward motion is expected to begin later
today, followed by a turn toward the north on Saturday. On the
forecast track, the center of Barry will be near or over the central
or southeastern coast of Louisiana Friday night or Saturday, and
then move inland into the Lower Mississippi Valley on Sunday.
Data from an Air Force Reserve reconnaissance aircraft indicate
that the maximum sustained winds remain near 50 mph (85 km/h) with
higher gusts. Some strengthening is expected during the next day
or so, and Barry could become a hurricane Friday night or early
Saturday when the center is near the Louisiana coast. Weakening is
expected after Barry moves inland.
Tropical-storm-force winds extend outward up to 140 miles (220 km)
primarily to the south and east of the center.
The minimum central pressure just measured by an Air Force
reconnaissance aircraft was 1001 mb (29.56 inches).
HAZARDS AFFECTING LAND
Key Messages for Barry can be found in the Tropical Cyclone
Discussion under AWIPS header MIATCDAT2 and WMO header WTNT42 KNHC.
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...
Mouth of the Atchafalaya River to Shell Beach...3 to 6 ft
Shell Beach to the Mississippi/Alabama border...2 to 4 ft
Intracoastal City to the Mouth of the Atchafalaya River...3 to 5 ft
Lake Pontchartrain...2 to 4 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.
RAINFALL: Barry is expected to produce total rain accumulations of
10 to 20 inches over southeast Louisiana and southwest Mississippi,
with isolated maximum amounts of 25 inches. These rains are expected
to lead to dangerous, life-threatening flooding over portions of the
central Gulf Coast into the Lower Mississippi Valley. Over the
remainder of the Lower Mississippi Valley, total rain accumulations
of 4 to 8 inches are expected, with isolated maximum amounts of 12
WIND: Hurricane conditions are expected in the Hurricane Warning
area by Friday night or Saturday morning, with tropical storm
conditions expected to begin on Friday. Hurricane conditions are
possible within the Hurricane Watch area by Friday night or
Saturday morning. Tropical Storm conditions are expected to spread
across the Tropical Storm Warning area starting early Friday, with
tropical storm conditions possible in the Tropical Storm Watch area
by Friday night or Saturday.
TORNADOES: A few tornadoes are possible Friday and Friday night
across southeast Louisiana, far southern Mississippi, and the
Next complete advisory at 400 AM CDT.