1. There is a danger of life-threatening storm surge along the Texas coast from Baffin Bay to Sargent, where a Storm Surge Warning is in effect. Residents in these locations should follow advice given by local emergency officials.xx

2. Hurricane conditions are expected along the Texas coast from Port Mansfield to Mesquite Bay, where a Hurricane Warning is in effect. Tropical storm conditions are expected to first reach the coast within the warning area Saturday morning.xx

3. Hanna is expected to produce heavy rains across portions of southern Texas and northeastern Mexico. These rains could result in life-threatening flash flooding and isolated minor to moderate river flooding.xx

CHANGES WITH THIS ADVISORY:

The Hurricane Warning has been extended southward to Port Mansfield Texas.

The Tropical Storm Warning has been extended northward to High Island Texas.

The government of Mexico has issued a Tropical Storm Warning north of Barra el Mezquital to the Mouth of Rio Grande.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Warning is in effect for... * Baffin Bay to Sargent Texas

A Hurricane Warning is in effect for... * Port Mansfield to Mesquite Bay Texas

A Tropical Storm Warning is in effect for... * Barra el Mezquital Mexico to Port Mansfield Texas * Mesquite Bay to High Island Texas

A Storm Surge Warning means there is a danger of lifethreatening inundation, from rising water moving inland from the coastline, during the next 24 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 lifethreatening 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 Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within the next 24 hours. 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, in this case within the next 24 hours.

Interests elsewhere along the Texas and Louisiana coasts should monitor the progress of Hanna. Interests in northeastern Mexico should also 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 national meteorological service.

Key messages for Hanna can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 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...

Baffin Bay to Sargent TX...including Corpus Christi Bay, Copano Bay, Aransas Bay, San Antonio Bay, and Matagorda Bay...3 to 5 ft Mouth of the Rio Grande to Baffin Bay TX...1 to 3 ft North of Sargent to High Island TX...including Galveston Bay...1 to 2 ft

The deepest water will occur along the immediate coast near and to the right of the landfall location. Surgerelated 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: Hurricane conditions are expected in the warning area Saturday afternoon. Tropical storm conditions are expected to begin in the warning area by Saturday morning.

RAINFALL: Hanna is expected to produce 5 to 10 inches of rain with isolated maximum totals of 15 inches through Sunday night in south Texas and into the Mexican states of Coahuila, Nuevo Leon, and northern Tamaulipas. This rain may result in lifethreatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding in south Texas.

Along the upper Texas and Louisiana coasts 3 to 5 inches of rain is expected.

SURF: Swells generated by Hanna are expected to increase and affect much of the Texas and Louisiana coasts during the next couple of days. These swells are likely to cause lifethreatening surf and rip current conditions. Please consult products from your local weather office.

TORNADOES: A brief tornado or two will be possible across portions of the Texas coast, beginning Saturday morning.

At 1000 PM CDT (0300 UTC), the center of Tropical Storm Hanna was located near latitude 27.1 North, longitude 94.8 West. Hanna is moving toward the west near 8 mph (13 km/h) and this motion should continue through Saturday morning. A gradual turn toward the westsouthwest is expected Saturday night and that motion should continue through Sunday. On the forecast track, the center of Hanna should make landfall along the Texas coast within the hurricane warning area Saturday afternoon or early evening.

Maximum sustained winds are near 65 mph (100 km/h) with higher gusts. Additional strengthening is forecast, and Hanna is expected to become a hurricane before the cyclone makes landfall on Saturday. Rapid weakening is expected after Hanna moves inland.

Tropicalstormforce winds extend outward up to 80 miles (130 km) from the center.

The estimated minimum central pressure based on data from the NOAA Hurricane Hunters is 992 mb (29.30 inches).

Hanna continues to strengthen over the northwestern Gulf of Mexico. Satellite and Doppler radar images indicate that the inner core continues to become better organized and the outer bands are now more symmetrical around the center. The NOAA Hurricane Hunters are currently investigating Hanna and have found maximum 850 mb flight-level winds of 72 kt and maximum SFMR winds of 51 kt. Based on this data, the initial intensity is increased to 55 kt for this advisory. The aircraft has also reported a minimum pressure of 992 mb, which is a 8 mb drop from the flight earlier today.

The NOAA aircraft data indicate that the center has moved a little south of west during the past few hours, and the storm is now a little south of the previous forecast track. A strengthening subtropical ridge over the central U.S. should cause the storm to continue to move generally westward, taking the center across the southern Texas coast tomorrow afternoon or early evening. After landfall, the storm is expected to turn to the west-southwest or southwest across extreme southern Texas and northern Mexico, and that motion should continue until the system dissipates.

Hanna still has another 18 hours or so to strengthen as it remains in light wind shear conditions and over the warm Gulf of Mexico waters. Since the structure of the system continues to improve, it seems likely that Hanna will reach hurricane intensity before it makes landfall. The peak intensity could be higher than what is shown in the intensity forecast below since landfall is expected to occur between the 12 and 24 h forecast times. After landfall, rapid weakening is anticipated, and Hanna is expected to dissipate on Monday over the rugged terrain of northern Mexico. The NHC intensity forecast lies at the high end of the model guidance for the next 24 h.