Tropical Storm Gordon Advisory Number 9
NWS National Hurricane Center Miami FL AL072018 1000 AM CDT Tue Sep 04 2018
...OUTER RAINBANDS PRODUCING SQUALLY WEATHER ALONG THE COAST OF THE WESTERN FLORIDA PANHANDLE... ...GORDON EXPECTED TO MAKE LANDFALL TONIGHT AS A HURRICANE...
SUMMARY OF 1000 AM CDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...28.5N 86.8W ABOUT 145 MI...235 KM ESE OF THE MOUTH OF THE MISSISSIPPI RIVER MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H PRESENT MOVEMENT...NW OR 305 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES
WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY:
The Tropical Storm Warning has been discontinued west of Grand Isle, Louisiana.
SUMMARY OF WATCHES AND WARNINGS IN EFFECT:
A Storm Surge Warning is in effect for... * Shell Beach to Dauphin Island
A Storm Surge Watch is in effect for... * West of Shell Beach to the Mouth of the Mississippi River * East of Dauphin Island to Navarre
A Hurricane Warning is in effect for... * Mouth of the Pearl River to the Alabama-Florida Border
A Tropical Storm Warning is in effect for... * West of the Mouth of the Pearl River to Grand Isle, including Lake Pontchartrain and Lake Maurepas * Alabama-Florida Border to Okaloosa-Walton County Line
A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, 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.
A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. 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 areas.
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 1000 AM CDT (1500 UTC), the center of Tropical Storm Gordon was located near latitude 28.5 North, longitude 86.8 West. Gordon is moving toward the northwest near 15 mph (24 km/h), and this general motion is expected to continue until landfall occurs tonight along the north-central Gulf coast. A northwestward motion with some decrease in forward speed is expected after landfall, with a gradual turn toward the north-northwest and north forecast to occur on Friday. On the forecast track, the center of Gordon will move across the northern Gulf of Mexico today, and will approach the north- central Gulf Coast within the hurricane warning area late this afternoon or evening, and move inland over the lower Mississippi Valley tonight and early Wednesday.
Reports from NOAA and Air Force Reserve Unit reconnaissance aircraft indicate that maximum sustained winds remain near 65 mph (100 km/h) with higher gusts. Some strengthening is expected today, and Gordon is forecast to be a hurricane when it makes landfall along the north-central Gulf Coast. Rapid weakening is forecast after Gordon moves inland.
Tropical-storm-force winds extend outward up to 80 miles (130 km) from the center. NOAA Buoy 42039, located north of Gordon's center, recently reported a sustained wind of 43 mph (69 km/h) and a gust to 49 mph (80 km/h).
The minimum central pressure recently reported by a NOAA reconnaissance aircraft was 1001 mb (29.56 inches).
HAZARDS AFFECTING LAND ---------------------- 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...
Shell Beach to Dauphin Island...3 to 5 ft. Navarre Florida to Dauphin Island, including Mobile Bay...2 to 4 ft. Shell Beach to the Mouth of Mississippi River...2 to 4 ft. Mouth of the Mississippi River to the Louisiana-Texas border...1 to 2 ft.
The deepest water will occur along the immediate coast near and to the east of the landfall location, where the surge will be accompanied by large waves. 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: Gordon is expected to produce total rain accumulations of 4 to 8 inches over the western Florida Panhandle, southwest Alabama, southern and central Mississippi, southeastern and northeastern Louisiana, and southern Arkansas, with isolated maximum amounts of 12 inches through late Thursday. This rainfall will cause flash flooding across portions of these areas.
WIND: Tropical storm conditions are expected to begin this afternoon within portions of the warning area, with hurricane conditions expected by this evening in the hurricane warning area.
TORNADOES: A few tornadoes are possible this afternoon through tonight near the coasts of Mississippi, Alabama, and the Florida Panhandle.