Tuesday, July 17, 2007

Storms continue in the Midwest



The Chicagoland area has been placed under a slight risk today by the SPC. Yesterday, most of the rain held off until late at night. Here on the North Side we had about 4/10ths of an inch, most of which fell after midnight. There was quite an electrical storm around midnight which kept me awake for awhile.

There is an upper ridge over the Rocky Mountains and Great Plains. Temperatures have been reported over the century mark over the Northern Plains. Convective complexes are rotating around the periphery of this ridge.





The second complex is moving across Northern Illinois at the moment. More storms are expected to form to our west later this afternoon. This is the forecast from the SPC:
 IN THE WAKE OF THESE STORMS...AIR MASS WILL SEE FULL SUNSHINE TODAY
OVER MOST OF IA/SOUTHERN MN/SOUTHEAST SD. THIS WILL YIELD
SIGNIFICANT DESTABILIZATION BY LATE AFTERNOON WITH TEMPERATURES IN
THE UPPER 90S TO LOWER 100S AND MLCAPE VALUES OVER 3000 J/KG.
SCATTERED THUNDERSTORMS ARE LIKELY TO INITIATE ALONG SURFACE
BOUNDARY ROUGHLY ALONG MHE-ALO AXIS AND QUICKLY BECOME SEVERE.
FORECAST SOUNDINGS SHOW SUBSTANTIAL LOW LEVEL AND DEEP LAYER
VERTICAL SHEAR INDICATING POTENTIAL FOR SUPERCELLS CAPABLE OF VERY
LARGE HAIL AND DAMAGING WINDS. STORMS WILL INITIALLY BE
HIGH-BASED...SOMEWHAT LESSENING THE TORNADO THREAT. HOWEVER...
EXTREME INSTABILITY AND SUFFICIENT SHEAR MAY RESULT IN AN INCREASING
TORNADO THREAT DURING THE EVENING AS STORMS TRACK SOUTHEASTWARD
ACROSS IA. EVOLUTION INTO FAST-MOVING MCS WITH ENHANCED DAMAGING
WIND THREAT IS ALSO POSSIBLE THIS EVENING ACROSS IA INTO IL/IND.
Now I have to decide if I should get those tickets for tonight's
Cubs game.

3 comments:

Dewdrop said...

I think you should chase... cha cha cha. ;-)

Mike said...

I think/hope the storms will chase me! I plan on having my broken camera patched up and ready to go if they do! Cha Cha Cha!

Dewdrop said...

That's what I'm talking about cha cha cha.