Gravity waves over MO. Severe weather expected.
Posted by JAC on 5/22/2011, 12:14 pm






MESOSCALE DISCUSSION 0849
  NWS STORM PREDICTION CENTER NORMAN OK
  1053 AM CDT SUN MAY 22 2011
 
  AREAS AFFECTED...MUCH OF ERN IA...NRN MO...NWRN IL...SWRN WI
 
  CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY
 
  VALID 221553Z - 221800Z
 
  CONDITIONS WILL BECOME QUITE FAVORABLE FOR SUPERCELLS AND TORNADOES
  LATER THIS AFTERNOON...AND ONE OR MORE TORNADO WATCHES ARE LIKELY BY
  MIDDAY.
 
  VISIBLE SATELLITE IMAGERY SHOWS A WELL DEFINED DRYLINE ACROSS ERN
  KS...NWRN MO AND INTO IA WHERE MORE EXTENSIVE CLOUD COVER EXISTED AS
  A RESULT OF THE UPPER VORT. MEANWHILE...A PSEUDO-WARM FRONT
  EXTENDING FROM CNTRL IA SEWD INTO CNTRL IL...WITH MID TO UPPER 60S F
  DEWPOINTS S OF THIS BOUNDARY.
 
  MORNINGS SOUNDINGS SHOWED CLASSIC LOADED GUN WITH SUBSTANTIAL
  BOUNDARY LAYER MOISTURE IN PLACE BENEATH A BREAKABLE CAPPING
  INVERSION. THE STRONGEST FORCING FOR ASCENT WILL DEVELOP FIRST
  ACROSS MN/IA/WI AS THE UPPER LOW CONTINUES EWD. NRN EXTENT OF THREAT
  AREA WILL COINCIDE WITH WARM FRONT. OTHER DEVELOPMENT WILL OCCUR SWD
  ALONG THE DRYLINE INTO MO AND FAR ERN KS WHERE A SUBSTANTIAL CU
  FIELD WAS ALREADY DEVELOPING AND WITH 3000-4000 J/KG MUCAPE. SHEAR
  PROFILES ARE FAVORABLE FOR SUPERCELLULAR STORM MODE CAPABLE OF A FEW
  STRONG TORNADOES AND VERY LARGE HAIL.
 
  ..JEWELL.. 05/22/2011
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Gravity waves over MO. Severe weather expected. - JAC, 5/22/2011, 12:14 pm
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