Tropical Storm Don (Updated:12:00pm CDT, 7/29/2011)

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 10:00am CDT:

LOCATION…26.2N 94.9W
ABOUT 190 MI…305 KM SE OF CORPUS CHRISTI TEXAS
ABOUT 165 MI…260 KM E OF BROWNSVILLE TEXAS
MAXIMUM SUSTAINED WINDS…50 MPH…85 KM/H
PRESENT MOVEMENT…WNW OR 300 DEGREES AT 14 MPH…22 KM/H
MINIMUM CENTRAL PRESSURE…1002 MB…29.59 INCHES

Figure 1. NHC's 10am CDT forecast track of TS Don

Infrared satellite images show that Don has become better organized over the past 3-4 hours, with convection near and south of the center. However, it is still experiencing 10-15 kt vertical wind shear on the north side. This may alter further organization before landfall, but there is still about 16 hours before it makes landfall.  Rain bands are currently visible on Brownsville radar.

The mid-level ridge, located in the southeastern part of the United States, will continued steering the storm west-northwest until landfall.  As of right now, Don should make impact somewhere between Port Mansfield and Baffin Bay.  This will still produce very heavy rainfall for the Rio Grande Valley, as most of the convection is located on the south side of the storm.  Expect anywhere from 2-6″, depending on where you live in the RGV.  There is also a possibility of locally heavier rainfall of 7-8″.  Don should steadily dissipate after making landfall, or in about 48 hours.

Here is what NWS Brownsville expects rainfall totals to be:

Figure 2. Tentative rainfall total forecast with TS Don. Courtesy of NWS Brownsville.

Figure 3. 1615Z IR satellite imagery of TS Don.

About Brian

University of Oklahoma graduate with a degree in Meteorology. Follow me on Twitter: @WeatherInformer
This entry was posted in Weather and tagged , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s