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We rarely get a Day 3 Moderate outlook from the SPC but earlier this morning the SPC did set a Moderate risk of severe weather for parts of Missouri and Illinois. Here is the text from the SPC.

DAY 3 CONVECTIVE OUTLOOK 
   NWS STORM PREDICTION CENTER NORMAN OK
   0230 AM CDT MON MAY 11 2009
  
   VALID 131200Z - 141200Z
  
   ...THERE IS A MDT RISK OF SVR TSTMS ACROSS PARTS OF IL AND MO...
  
   ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE OH
   VALLEY...SRN GREAT LAKES...MID-MS VALLEY...OZARKS...CNTRL PLAINS AND
   SRN PLAINS...
  
   ...UPPER TO MID-MS VALLEY/OZARKS/SRN PLAINS...
   AN UPPER-LEVEL TROUGH WILL AMPLIFY AND MOVE EWD ACROSS THE NRN
   STATES AS A WELL-DEFINED MID-LEVEL JET ROUNDS THE BASE OF THE
   TROUGH. AHEAD OF THE SYSTEM...RETURNING LOW-LEVEL MOISTURE SHOULD
   CREATE A LARGE WARM SECTOR FROM THE SRN PLAINS NNEWD ACROSS THE MID
   TO UPPER-MS VALLEY. STRONG LARGE-SCALE ASCENT WITH THE UPPER-LEVEL
   TROUGH AND STRONG VERTICAL SHEAR PROFILES ASSOCIATED WITH THE
   MID-LEVEL JET OVER THE WARM SECTOR SHOULD RESULT IN THE POTENTIAL
   FOR A WIDESPREAD SEVERE WEATHER EVENT WEDNESDAY AND WEDNESDAY NIGHT.
  
  
   EARLY IN THE PERIOD...AN MCS SHOULD BE ONGOING IN THE MID-MS VALLEY
   WITH THIS CONVECTIVE CLUSTER MOVING EWD ACROSS PARTS OF THE OH
   VALLEY. IN THE WAKE OF THE MCS...SFC-BASED THUNDERSTORMS SHOULD
   INITIATE ALONG AND AHEAD OF A COLD FRONT WEDNESDAY AFTERNOON FROM
   NCNTRL IL SWWD ACROSS MO INTO SE KS. MODEL FORECASTS REMAIN
   CONSISTENT THAT THIS CONVECTION WILL ORGANIZE INTO A WELL-DEVELOPED
   LINEAR MCS EWD ACROSS THE WRN PORTION OF THE OH VALLEY SWWD ACROSS
   THE MID-MS VALLEY...NRN OZARKS INTO ERN OK WEDNESDAY EVENING. THE
   GFS AND ECMWF ARE IN GOOD AGREEMENT WITH THE POSITION OF THE
   UPPER-LEVEL TROUGH. THIS COMBINED WITH GOOD CERTAINTY CONCERNING THE
   DEVELOPMENT OF NUMEROUS STORMS IN A STRONGLY SHEARED ENVIRONMENT
   SUPPORTS THE ISSUANCE OF A MODERATE RISK IN IL AND MO WEDNESDAY
   AFTERNOON AND EVENING. PARAMETERS ON FORECAST SOUNDINGS SUGGEST THE
   ENVIRONMENT WILL BE FAVORABLE FOR A SIGNIFICANT SEVERE WEATHER EVENT
   WITH A STRONGLY FORCED LINE OF INTENSE STORMS. SWWD ACROSS THE
   OZARKS AND SRN PLAINS...THUNDERSTORMS SHOULD BE MORE ISOLATED DUE TO
   WEAKER FORCING. A GRADUAL DROP OFF IN SEVERE REPORT COVERAGE SHOULD
   OCCUR IN THE OZARKS AND SRN PLAINS FOR THIS REASON.

A strong linear Derecho is approaching the Birmingham, AL area with several possible imbedded tornadoes. Stay tuned to your local station for further information.

  MESOSCALE DISCUSSION 0731 NWS STORM PREDICTION CENTER NORMAN OK 0904 AM CDT WED MAY 06 2009 AREAS AFFECTED...NRN THROUGH S CNTRL AL AND NRN GA CONCERNING...SEVERE THUNDERSTORM WATCH 252... VALID 061404Z - 061500Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 252 CONTINUES. STORMS ARE EXPECTED TO CONTINUE DEVELOPING ESEWD ACROSS NRN AND CNTRL AL THROUGH NRN GA NEXT SEVERAL HOURS. PRIMARY THREAT WILL BE DAMAGING WIND...THOUGH ISOLATED TORNADOES CANNOT BE RULED OUT. A NEW WW TO REPLACE WW 251 WILL BE NEEDED SOON. LINEAR MCS WITH EMBEDDED BOWS AND SUPERCELLS EXTENDS FROM NRN THROUGH SWRN AL AND IS MOVING EAST AT AROUND 40 KT. WIDESPREAD CLOUDS WILL SLOW BOUNDARY LAYER HEATING SOMEWHAT...BUT LATEST VISIBLE IMAGERY SHOWS NUMEROUS BREAKS DEVELOPING FROM S CNTRL AL THROUGH S CNTRL GA. A STRONG SWLY LOW LEVEL JET OVER AL WILL PERSIST AND SHIFT ENEWD TOWARD NRN GA NEXT FEW HOURS. THE LOW LEVEL JET WILL CONTRIBUTE TO NWD ADVECTION OF HIGHER THETA-E AIR FROM THE DESTABILIZING WARM SECTOR AND MAINTAIN FAVORABLE STORM RELATIVE INFLOW FOR A FORWARD PROPAGATING MCS. STRONG BULK SHEAR AND SUFFICIENTLY LARGE LOW LEVEL HODOGRAPHS WILL FAVOR EMBEDDED ORGANIZED STORM STRUCTURES. DAMAGING WIND WILL BE THE PRIMARY THREAT ALONG THE LINE...BUT ISOLATED TORNADOES ARE ALSO POSSIBLE. THE TORNADO THREAT WOULD INCREASE IF MORE DISCRETE STORMS INITIATE AHEAD OF THE LINE.