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Tropical Storm Barry Intermediate Advisory Number 9A
NWS National Hurricane Center Miami FL AL022019
100 PM CDT Fri Jul 12 2019
...TROPICAL STORM CONDITIONS SPREADING ACROSS PORTIONS OF
...DANGEROUS STORM SURGE, HEAVY RAINS, AND WIND CONDITIONS
EXPECTED ACROSS THE NORTH-CENTRAL GULF COAST...
SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION
ABOUT 105 MI...170 KM WSW OF THE MOUTH OF THE MISSISSIPPI RIVER
ABOUT 100 MI...160 KM SSE OF MORGAN CITY LOUISIANA
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...WNW OR 290 DEGREES AT 5 MPH...7 KM/H
MINIMUM CENTRAL PRESSURE...993 MB...29.32 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 Biloxi
* Lake Pontchartrain
A Storm Surge Watch is in effect for...
* Biloxi to the Mississippi/Alabama border
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 PM CDT (1800 UTC), the center of Tropical Storm Barry was
located near latitude 28.4 North, longitude 90.6 West. Barry is
moving toward the west-northwest near 5 mph (7 km/h). A motion
toward the northwest is expected to begin later today, followed by a
turn toward the north Saturday night. On the forecast track, the
center of Barry will approach the central or southeastern coast of
Louisiana through tonight and then make landfall over the central
Louisiana coast on Saturday. After landfall, Barry is expected to
move generally northward through the Mississippi Valley through
Reports from an Air Force Reserve Hurricane Hunter aircraft
indicate that maximum sustained winds are near 65 mph (100 km/h)
with higher gusts. Strengthening is forecast before landfall, and
Barry is expected to be a hurricane when the center reaches the
Louisiana coast. Weakening is expected after Barry moves inland.
Tropical-storm-force winds extend outward up to 175 miles (280 km)
from the center. The NOAA automated station at the Southwest Pass
of the Mississippi River recently reported sustained winds of
55 mph and a wind gust of 66 mph at an elevation of 125 ft. An oil
rig located southwest of the Mouth of the Mississippi River recently
reported sustained winds of 76 mph and a wind gust of 87 mph at an
elevation of 295 ft.
The minimum central pressure just reported by the Hurricane Hunter
aircraft is 993 mb (29.32 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 Biloxi MS...3 to 5 ft
Intracoastal City to the Mouth of the Atchafalaya River...3 to 5 ft
Lake Pontchartrain...3 to 5 ft
Biloxi MS to the Mississippi/Alabama border...2 to 4 ft
Lake Maurepas...1 to 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.
RAINFALL: Barry is expected to produce total rain accumulations of
10 to 20 inches over south-central and southeast Louisiana along
with 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 inches.
WIND: Hurricane conditions are expected in the Hurricane Warning
area tonight or Saturday, with tropical storm conditions beginning
during the next few hours. Hurricane conditions are possible
within the Hurricane Watch area by tonight or Saturday morning.
Tropical storm conditions are spreading across the Tropical Storm
Warning area in southeastern Louisiana at this time. Tropical storm
conditions are possible in the Tropical Storm Watch area by tonight
or Saturday. Wind gusts to tropical-storm force in squalls are
possible along portions of the coasts of Alabama and the western
Florida Panhandle through Saturday night.
TORNADOES: A couple tornadoes are possible this afternoon through
tonight across southeast Louisiana, far southern Mississippi, and
the Alabama coast.
Next complete advisory at 400 PM CDT.