Tuesday, July 25, 2006

Disturbed weather in the western Gulf of Mexico might become an organized tropical system

An area of disturbed weather in the western Gulf of Mexico is being watched for possible development within the next 24 to 36 hours. We are carefully monitoring a couple of low pressure areas along or just off the coast of Mexico just east and northeast of Tampico crawling northward toward the south Texas coast. This area of low pressure could be evolving into a tropical depression. As long as the low pressure areas stay near the coast frictional forces will slow and perhaps inhibit development. An upper level low over northeast Mexico is creating southwest upper level winds over the system. This is creating some shear over the feature and this is another inhibiting factor for development. We believe the shear being caused by the upper level low will decrease over the next 24 hours. If the shear diminishes enough and the surface low pressure moves a bit more off the coast then this feature could wrap up into an organized tropical system very quickly. Since the system is disorganized all the stronger winds and persistent heavy rainfall is well to the east and northeast, well offshore. In a system like this the heavier rainfall will remain north and east of the weak low pressure center. If the thunderstorms and rain start to wrap around the surface low pressure area that will be a sign of organization. We did not see that happen during Monday afternoon. Reguardless of whether this becomes better organized the system will bring heavy rainfall to parts of coastal Texas during the next 36 hours. We expect the surface low pressure area to track northward which will bring that feature just east of Brownsville by Tuesday morning then due east of Corpus Christi by late Tuesday afternoon. The surface low pressure area will move into east Texas during Wednesday. So, if it's going to organize and devleop it will have to do so by Wednesday morning.