4:00 PM Update Is In On Tropical Storm Barry

As of this update, Tropical Storm Barry remains at 40 MPH for maximum sustained winds and movement continues to be to the west at 5 MPH. The center is currently located around 90 miles south of the mouth of the Mississippi River and about 175 miles southeast of Morgan City, Louisiana. Minimum central pressure is at 1003mb, or 29.62 inches. Here is the latest from the National Hurricane Center:

WATCHES AND WARNINGS
CHANGES WITH THIS ADVISORY

A Hurricane Warning is now in effect for the coast of Louisiana from Intracoastal City to Grand Isle.

A Tropical Storm Warning is now in effect for Lake Pontchartrain and Lake Maurepas including metropolitan New Orleans.

A Tropical Storm Warning is now in effect for the Louisiana coast west of Intracoastal City to Cameron.

A Storm Surge Watch is in effect for Lake Pontchartrain.

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 Orleans
* Intracoastal City to Cameron

A Storm Surge Warning is in effect for…
* Mouth of the Atchafalaya River to Shell Beach

A Storm Surge Watch is in effect for…
* Shell Beach to the Mississippi/Alabama border
* Mouth of the Atchafalaya River to Intracoastal City
* 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 border

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 dangerous.

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 400 PM CDT (2100 UTC), the center of Tropical Storm Barry was located near latitude 27.8 North, longitude 89.3 West. Barry is moving toward the west near 5 mph (7 km/h) and this motion is expected to continue tonight. A turn toward the northwest is expected on Friday, 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.

Maximum sustained winds are near 40 mph (65 km/h) with higher gusts. Strengthening is expected during the next day or two, and Barry could become a hurricane late Friday 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) from the center. An oil rig east of the Mouth of the Mississippi River recently reported sustained winds of 40 mph and a wind gust of 52 mph at an elevation of 525 feet.

The estimated minimum central pressure is 1003 mb (29.62 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…2 to 4 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. 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 by Friday night or Saturday morning, with tropical storm conditions expected by Friday morning. 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 late tonight, with tropical storm conditions possible in the Tropical Storm Watch area by Friday night or Saturday.

TORNADOES: A few tornadoes are possible Friday late morning through Friday night across southeast Louisiana, far southern Mississippi, and the Alabama coast.

The next main update will be out at 10:00 pm tonight, while an intermediate update will be out at 7:00 pm this evening.

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