SPC AC 090600

   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0100 AM CDT SUN JUN 09 2013

   VALID 101200Z - 111200Z

   ...NO SVR TSTM AREAS FORECAST...

   ...SYNOPSIS...
   AN UPPER LOW INITIALLY INVOF COASTAL CENTRAL/SRN CA IS FORECAST TO
   SHIFT INLAND/NEWD AND WEAKEN WITH TIME.  HOWEVER...A SECOND LOW
   DIGGING SWD ALONG BRITISH COLUMBIA/PAC NW COASTAL AREA WILL COMBINE
   WITH THE INLAND-MOVING CA LOW TO RESULT IN OVERALL EXPANSION OF
   LONGER-WAVELENGTH TROUGHING OVER THE ERN PACIFIC/WRN U.S. THROUGH
   THE PERIOD.  DOWNSTREAM...RIDGING ALOFT IS FORECAST TO SPREAD EWD
   ACROSS THE ROCKIES AND INTO THE CENTRAL U.S./PLAINS STATES...WHILE A
   LOW/TROUGH OVER THE MIDWEST/TN VALLEY REGION MOVES EWD TO THE
   CENTRAL APPALACHIANS THROUGH THE END OF THE PERIOD.

   AT THE SURFACE...LEE TROUGHING IS FORECAST ACROSS THE HIGH
   PLAINS...WHILE A BAROCLINIC ZONE LYING ACROSS THE NRN INTERMOUNTAIN
   REGION AND THEN SWWD ACROSS THE NWRN QUARTER OF THE U.S. MOVES
   LITTLE.  FARTHER E...A LOW ASSOCIATED WITH THE PROGRESSING ERN U.S.
   UPPER TROUGH IS FORECAST TO ADVANCE EWD ACROSS THE MIDWEST/OH
   VALLEY...REACHING THE NY VICINITY BY THE END OF THE PERIOD.

   ...ERN CONUS...
   BANDS OF SHOWERS AND THUNDERSTORMS ARE FORECAST ACROSS A LARGE
   PORTION OF THE ERN CONUS...WITHIN THE BROAD ZONE OF CYCLONIC FLOW
   ALOFT SURROUNDING THE UPPER SYSTEM EXPECTED TO BE CROSSING THE OH/TN
   VALLEY REGION THROUGH THE AFTERNOON/EVENING.  WITH
   CLOUDS/PRECIPITATION LIMITING DESTABILIZATION POTENTIAL IN MOST
   AREAS...OVERALL SEVERE THREAT WILL LIKELY REMAIN LIMITED.

   POCKETS/AREAS OF GREATER THREAT MAY EVOLVE NEAR PEAK
   HEATING...POSSIBLY INVOF THE TN VALLEY WHERE SLIGHTLY GREATER
   DESTABILIZATION IS POSSIBLE AND/OR E OF THE APPALACHIANS INVOF THE
   CAROLINAS/VA WHERE A BELT OF ENHANCED SWLYS ALOFT ARE EXPECTED. 
   HOWEVER...UNCERTAINTY REMAINS HIGH ATTM WITH RESPECT TO ANY AREAS OF
   POTENTIALLY GREATER SEVERE RISK...AND THUS WILL MAINTAIN ONLY A
   LARGE 5%/SEE TEXT AREA ATTM.  ONE OR MORE SMALL SLIGHT RISK AREAS
   MAY BE REQUIRED IN LATER OUTLOOKS...ONCE THE SCENARIO BECOMES A BIT
   MORE CLEAR.

   ...NRN INTERMOUNTAIN REGION...
   AS LARGE-SCALE ASCENT AHEAD OF THE UPPER SYSTEM CROSSING THE GREAT
   BASIN DURING THE AFTERNOON SPREADS INTO THE MT/WY REGION DURING THE
   AFTERNOON AND EVENING...ISOLATED CONVECTIVE DEVELOPMENT WILL LIKELY
   OCCUR.  WEAK INSTABILITY IS EXPECTED TO LIMIT OVERALL CONVECTIVE
   INTENSITY...BUT MODEST DESTABILIZATION JUXTAPOSED WITH AMPLE SHEAR
   ACROSS PARTS OF SWRN MT AND POSSIBLY PARTS OF NRN WY MAY RESULT IN A
   COUPLE OF STRONGER CELLS CAPABLE OF LOCAL/BRIEF DAMAGING WIND
   POTENTIAL AND/OR MARGINAL HAIL INTO THE EVENING HOURS.

   ..GOSS.. 06/09/2013

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   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z