Hurricane Alex - Brownsville, Texas (KBRO) Radar Loop - June 30 - July 1, 2010

Level 2 base reflectivity radar loop of Hurricane Alex from the lowest tilt of the KBRO (Brownsville, Texas) site. The loop runs from 1004UTC on June 30, 2010 to 0857UTC on July 1, 2010 and shows Hurricane Alex making landfall over northeastern Mexico, near Soto La Marina and Campo Pesquero Enramadas and then moving west-southwest across the state of Tamaulipas. The loop includes a volumized 3D view of the hurricane's base reflectivity. The color table highlights reflectivity values of 25 DBZ or greater.

For a portion of this loop the hurricane's radar presentation displays a double eyewall structure with a distinct "moat" delineating the inner and outer eyewalls... as well as the brief formation of a "hub" cloud (at the center of the eye) just prior to landfall.

The following paper goes into more detail on the relationship of subsidence within the eye of hurricanes and the formation of a hub cloud.

http://www.ssec.wisc.edu/~kossin/articles/schubertetal2007.pdf

Category:

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• Hurricane
• Alex
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• Brownsville
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[mainchow10]

The radar on TWC was much lighter than this. Great video though.

[vmax135]

@mainchow10 Yeah, though it is the same app (GR2Analyst) that they show frequently on TWC, I'm using my own color tables that I created specifically for use with tropical systems, so my loops will typically look a bit different. Glad you liked the clip.

[liquidstl]

ts amazing how organzed that strom was... WOW

[vmax135]

@liquidstl Hi Chris! Yeah... the structure and minimum pressure of Alex were that of a much stronger system than supported by the maximum sustained winds. It looked like it was really trying to pull together fast, right at the end... a few more hours and I'm sure the winds would have caught up to how deep the storm was.

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[BrownsvilleLiving]

Very cool! Brownsville Living. Be part of it.

[mastoriswaiter]

GREAT JOB MIKE !!!! this is william Btw

[TornadoWarning]

Gorgeous storm. Look that the eyewall near landfall. 

[liquidstl]

So Well defined.

[NittanyTiger1]

Alex had some excellent structure for a Cat 2 hurricane. For a bit before landfall, it had dual rotation centers like Andrew did at its strongest (as I saw from your Andrew loop video). i think this storm would have become a Cat 3 if it stayed out over water for a while longer.

[vmax135]

@DarkStar1O9 It's certainly possible that there's some complex interaction between eyewall convection and eye subsidence that is part of the process for hub cloud formation. Regardless of the mechanism it seems logical that, at the time the hub cloud is present, the greatest subsidence and warming is restricted to a ring along the inner edge of the eye, rather than at the typical location in the center. I've linked a paper that goes into much more detail in this video's description.