Impressive southern stream synoptic disturbance

Jeff Duda

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While us poor saps in the US are wallowing over an inactive May period, it seems our neighbors to the south may actually be getting in on the action. The synoptic scale disturbance associated with the subtropical jet has looked most impressive over the last 24 hours or so. Yesterday it appeared an outbreak of supercells occurred in northern Mexico. Granted that region is high up and very desolate, so probably not serving as a great place to chase, but I bet some of the sights out there along the Mexican highway 45 corridor from Chihuahua to Ciudad Juarez were something given what visible satellite looked like yesterday afternoon:

20120509_2200_vis.jpg


Some of those were deviant movers to the right of the flow. Unfortunately the radar sites in that region of Mexico were down yesterday, so there was no radar imagery of any of those storms.

Today, the system appears to be well wrapped up and looks like a typical winter or spring time Norwegian cyclone over the Plains/Midwest, just displaced 15 degrees latitude south!

2012131.1745_US_wv.jpg


Awesome dry conveyor belt depiction and ventilation on the poleward side of it.

It's too bad the Mexican raob network is so unreliable. I bet there were some good looking soundings for severe weather. Just look at today's 12Z sounding from Del Rio. How often do you think they get a profile like that?

DRT.gif


Something you definitely don't expect to see in May.
 
Very interesting recap Jeff. I'd be curious to hear from our member and resident from Del Rio, Mr. Gene Moore as to what's happening down there today. He probably didn't have to leave his driveway today.
 
Here is a radar image of the southernmost supercell from Thursday afternoon after it moved into the Gulf of Mexico. I don't think I've ever seen such a well defined mesocyclone over the ocean.

kcrp0510.jpg


And a special marine warning was issued confirming rotation in the storm:

AT 428 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A THUNDERSTORM PRODUCING HAIL ONE INCH OR LARGER ABOUT 9 NM
EAST OF PORT ARANSAS...MOVING NORTHEAST AT 15 KNOTS. IN ADDITION...
NATIONAL WEATHER SERVICE DOPPLER RADAR IS INDICATING A WATERSPOUT
WITH THIS THUNDERSTORM.

http://asp1.sbs.ohio-state.edu/main.php?fetch=KCRP_201205102130.txt&textdir=marine%2Fstatement&pageloc=viewtext&filter=KBRO%7CKCRP%7CKEWX
 
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