CURRENT TROPICAL CYCLONES:
Tropical Cyclone 08L (Hanna)…located about 30 miles north-northeast McAllen, Texas
1.) A broad area of low pressure associated with a tropical wave located about 1000 miles west-southwest of the Cabo Verde Islands is producing a large area of cloudiness and disorganized showers and thunderstorms. Environmental conditions appear conducive for development, and a tropical depression is likely to form early this week while the wave moves westward at around 15 mph across the tropical Atlantic.
What the computer models are showing
* Formation chance through 48 hours…medium…60 percent
* Formation chance through 5 days…high…90 percent
Here’s a satellite image of the Atlantic Ocean
WSI satellite image of the Caribbean Sea
Latest satellite image of the Caribbean Sea and the Gulf of Mexico
Gulf of Mexico: Hurricane 08L (Hanna)
According to the NHC, Hanna is moving toward the west-southwest near 9 mph (15 km/h) and this motion is expected to continue through Sunday.
On the forecast track, the center of Hanna should continue to move farther inland over southern Texas tonight and move into northeastern Mexico on Sunday.
Maximum sustained winds are near 75 mph (120 km/h) with higher gusts. Rapid weakening is expected as Hanna moves farther inland.
Hurricane-force winds extend outward up to 30 miles (45 km), mainly to the east of the center and tropical-storm-force winds extend outward up to 105 miles (165 km).
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…
Port Mansfield to Baffin Bay TX…2 to 4 ft
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 Port Mansfield 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. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances.
WIND: Hurricane conditions are expected in the warning area this afternoon. Tropical storm conditions are expected to begin in the warning area later this morning.
RAINFALL: Hanna is expected to produce 6 to 12 inches of rain with isolated maximum totals of 18 inches through Sunday night in south Texas and into the Mexican states of Coahuila, Nuevo Leon, and northern Tamaulipas. This rain may result in life-threatening flash flooding, rapid rises on small streams, and isolated minor to moderate river flooding in south Texas.
3 to 5 inches of rain is expected along the upper Texas and Louisiana coasts.
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 life-threatening surf and rip current conditions.
TORNADOES: A few tornadoes are possible today and overnight over parts of the lower to middle Texas coastal plain.