Tropical Storm Don (Updated: 7:30pm CDT, 7/29/2011)

*This will be the last update on TS Don, as it is weakening and about to make landfall*

Watches/Warnings:

A TROPICAL STORM WARNING IS IN EFFECT FOR
* TEXAS COAST FROM THE MOUTH OF RIO GRANDE TO MATAGORDA

A TROPICAL STORM WARNING CONTINUES FOR THE FOLLOWING LOCATIONS IN THE LOWER RGV:  INLAND CAMERON…INLAND WILLACY…COASTAL CAMERON…COASTAL WILLACY…HIDALGO…STARR…JIM HOGG…BROOKS…KENEDY

A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS.

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA…GENERALLY WITHIN 48 HOURS.

Here is the latest on TS Don, as of 7:00pm CDT:

LOCATION…27.1N 97.1W
ABOUT 50 MI…85 KM SSE OF CORPUS CHRISTI TEXAS
ABOUT 85 MI…135 KM NNE OF BROWNSVILLE TEXAS
MAXIMUM SUSTAINED WINDS…50 MPH…85 KM/H
PRESENT MOVEMENT…WNW OR 300 DEGREES AT 16 MPH…23 KM/H
MINIMUM CENTRAL PRESSURE…1004 MB…29.65 INCHES

…Discussion… 
A westward moving meso-cyclone formed just southeast of South Padre Island, that could have brought severe weather for Cameron County around 3:30pm this afternoon.  The meso-cyclone, however, did weaken before making landfall and wasn’t a threat.  Some convection did fire up in the western Valley and in parts of Hidalgo and Cameron Counties this afternoon, but quickly dissipated.

Tropical Storm Don will be making landfall somewhere near Baffin Bay in the next hour or two.  Rainfall has weakened considerably in the past few hours, due to an encounter with dry, stable air.  Therefore, rainfall amounts should not be as much as previously forecast.  There are still pockets of moderate to heavy rainfall embedded right now, and places around the Valley may still see up to 1-2 inches (locally heavier amounts).  Overall, most the Rio Grande Valley should remain under 2″ of rain for tonight.  Though it is still possible for convection to flare up tomorrow, Don will quickly be exiting the area by late morning/early afternoon.  There is still the possibility of tropical storm force winds tonight, especially near the coast and in the extreme northern parts of the Valley.  The heaviest winds will likely stay north of the Valley, in Brooks and Kenedy Counties.

Overall, the worst case scenario for the next 24 hours would still be flooding in areas that get heavier pockets of rain.  Gusty winds are still possible at times.  The threat of tornadoes is now almost at 0, at least for the Rio Grande Valley.   Rip currents will still be strong and seas will still be rough at the surf.  Please be careful if going to the beach.

Questions and comments are always welcomed..

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About Brian

University of Oklahoma graduate with a degree in Meteorology. Follow me on Twitter: @WeatherInformer
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