SPC meso-analysis thermodynamics - 21z
Notes:
The SPC meso-analysis at 21z indicated mixed-layer CAPE values between 1000 and 2000 J/kg over New York and Pennsylvania. Downdraft CAPE values were between 600 and 1000 J/kg. Mid-level lapse rates were not particularly large, with values between 5.5 and 6.0 degrees C per km. LCL heights were rather low; between 750 and 1000 m.
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Slide 11