Tuesday, April 19, 2011

Pre-NOWCAST Updates

After this post, I'll be going into Nowcast mode, awaiting for storms to begin firing. Unfortunately, I won't be participating too much in the action later this evening and overnight as I'll actually be working my 'paid' job. However, will have an excellent view of things at Louisville International Airport.

Check out some of the temperatures, quite a contrast along that warm front. Just click on the image to enlarge.
That warm front has also been an efficient producer of heavy rain, especially in the northern areas of our region. Here are some rainfall amounts since midnight.
Awaiting the updated information from the SPC...and...
Just out...Still a MODERATE risk for severe storms across the region. Again, my thinking is that they are awaiting data that will help them determine when the Cap will begin to erode and where the best chance for severe weather, especially supercellular ones will occur. At that time, a HIGH risk and Potentially Dangerous Situation tornado watches may be forthcoming later this evening.
The SPC says:

IN A CORRIDOR OF ENHANCED LOW-LEVEL SHEAR FROM E-CNTRL MO EWD
   THROUGH CNTRL PARTS OF IL/IND.  GIVEN MORE DISCRETE STORM MODES
   /I.E. SUPERCELLS/...THIS AREA WILL REPRESENT THE GREATEST RISK FOR
   TORNADOES /SOME POSSIBLY STRONG/ FROM LATE THIS AFTERNOON INTO
   TONIGHT. 
OTHERWISE...EXPECT THE DEVELOPMENT OF SUPERCELLS AND LINE
   SEGMENTS ALONG COLD FRONT WITH EVENTUAL UPSCALE GROWTH INTO ONE OR
   MULTIPLE MCSS/QLCSS.  WIDESPREAD OCCURRENCES OF HAIL AND DAMAGING
   WINDS /SOME SIGNIFICANT/ ARE EXPECTED ACROSS THE MODERATE RISK AREA
   INTO EARLY WEDNESDAY DUE TO THE PRESENCE OF STEEP LAPSE RATES AND
   THE WIDE...UNSTABLE WARM SECTOR.

I'll be going into Nowcast mode in my next post later today.
MS

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