First Atlantic region (actually, Gulf of Mexico) hurricane for 2010.

2010-07-02: Declared dissipated at 10:00PM CDT

2010-07-01: Reached cat 2 prior to landfall, now downgraded to tropical storm. Came ashore about 10:15 EDT June 30 south of the US/Mexico border south of Brownsville. 14″ rain in areas north of Brownsville by 11 PM, projected to reach 20″ in isolated areas. Sustained winds of 100mph at landfall with higher gusts.

Radar base reflectivity image of Hurricane Alex as cat 2, just prior to landfall on the northeast coast of Mexico, 7:31 CDT, July 1, 2010. Warning blocks are flood warnings for the Brownsville, Tx, area. Storm is much larger than radar implies. Range limits of KBRO Brownsville radar site means beam overshoots storm at limit of range.

Radar animation of Hurricane Alex covering the period from 10 AM CDT June 30 to 7:30 AM July 1, 2010. During this period, Alex increased in strength to a category 2 hurricane. You can see the eye form up and hold until landfall, finally breaking down as it ran into the dry mountains of Mexico. (Please note: this is a large file, 16.6mb. Allow time to load. If animation doesn’t run in thread, click on image to download full size file to view).

Hurricane Alex June 2010

Base Reflectivity radar animation of Hurricane Alex 9:59 AM CDT June 30, 2010 to &:31 AM CDT July 1, 2010 KBRO, Brownsville, Tx. Created from data supplied by the US NWS

The storm extent is much broader than the radar images indicate (as can be seen by the marine warning blocks that pop up off Louisiana to the north). As the radar beam reaches further out from the radar site, it begins to overshoot the tops of the storm. The edges of the pattern will show less activity than is actually happening at the fringe.

A later animation of Alex dissipating over northern Mexico and SW Texas (same radar paremeters):