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Tropical Depression Alberto Discussion Number  12
NWS National Hurricane Center Miami FL       AL012024
1000 AM CDT Thu Jun 20 2024
 
Alberto made landfall earlier this morning near Tampico, Mexico.
Satellite imagery depicts deep convection producing heavy rainfall
over the higher terrain in Mexico. The center of the system has
become more difficult to track, and is more ill-defined, as it
moves inland. Given the lack of tropical-storm-force wind
observations along the coast and the average decay over land, the
intensity for this advisory is set to 30 kt. Therefore, Alberto has
weakened into a tropical depression.
 
The depression will continue to move quickly westward steered by a
deep-layer ridge to the north. The system is moving farther inland
over northern Mexico, and is forecast to continue to weaken over
the higher terrain. A 12-hour forecast point is shown for
continuity, with global model fields depicting the system 
dissipating later today.
 
Alberto remains a large system and continues to produce moderate
coastal flooding across portions of southern Texas, given the
onshore wind flow. Heavy rainfall associated with Alberto will
continue to impact northeastern Mexico throughout the day today,
with considerable flash and urban flooding likely.
 
Key Messages:
 
1. Rainfall associated with Tropical Depression Alberto will begin
to diminish today across southern Texas. However, heavy rainfall
will continue to impact northeastern Mexico, and life-threatening
flooding and mudslides are likely in and near areas of higher
terrain across the Mexican states of Coahuila, Nuevo Leon, and
Tamaulipas, including the cities of Monterrey and Ciudad Victoria.
 
2. Moderate coastal flooding is likely along much of the Texas
Coast through today's high tide, subsiding later this afternoon.
 
3. Swells generated by Alberto are affecting the coast of Texas and
northeastern Mexico through Friday. These swells are producing
life-threatening surf and rip current conditions.
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  20/1500Z 22.3N  99.4W   30 KT  35 MPH...INLAND
 12H  21/0000Z 22.1N 102.7W   25 KT  30 MPH...POST-TROP/REMNT LOW
 24H  21/1200Z...DISSIPATED
 
$$
Forecaster Kelly
 
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