SPC AC 070730

   DAY 3 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0230 AM CDT SUN JUN 07 2015

   VALID 091200Z - 101200Z

   ...THERE IS A MRGL RISK OF SVR TSTMS ACROSS THE UPPER MIDWEST...

   ...THERE IS A MRGL RISK OF SVR TSTMS FROM THE LOWER MS
   VALLEY/SOUTHEAST STATES TO NEW ENGLAND...

   ...SUMMARY...
   ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL BE POSSIBLE TUESDAY
   ACROSS PARTS OF THE EASTERN AND SOUTHEAST UNITED STATES IN ADDITION
   TO THE UPPER MIDWEST.

   ...SYNOPSIS...
   A BELT OF STRONGER AMPLIFIED WESTERLIES WILL EXIST OVER THE NORTHERN
   TIER OF THE CONUS AND CANADA ON TUESDAY. ONE UPPER TROUGH WILL
   CONTINUE EASTWARD OVER THE NORTHEAST STATES/NEW ENGLAND...WHILE A
   SECONDARY TROUGH AMPLIFIES/SPREADS SOUTHEASTWARD OVER THE CANADIAN
   PRAIRIES TOWARD NORTHERN ONTARIO/UPPER GREAT LAKES REGION.

   ...UPPER MIDWEST/UPPER GREAT LAKES...
   AN UPPER TROUGH IS EXPECTED TO AMPLIFY OVER MANITOBA/NORTHERN
   ONTARIO ON TUESDAY WITH A STRONG MID-LEVEL JET EXPECTED TO
   OVERSPREAD THE UPPER MS RIVER VALLEY/UPPER GREAT LAKES. ALTHOUGH
   MOISTURE RETURN AHEAD OF A SOUTHEASTWARD-MOVING COLD FRONT WILL NOT
   BE ROBUST...LOWER 60S F SURFACE DEWPOINTS AND PRE-FRONTAL HEATING
   SHOULD ACCOUNT FOR AT LEAST WEAK TO MODERATE DESTABILIZATION...WITH
   AT LEAST WIDELY SCATTERED STORMS EXPECTED TO INCREASE/INTENSIFY
   TUESDAY AFTERNOON/EARLY EVENING ACROSS PARTS OF MN INTO
   NORTH-CENTRAL WI AND THE UPPER PENINSULA OF MI. A RELATIVELY
   FAVORABLE COMBINATION OF INSTABILITY/VERTICAL SHEAR SHOULD LEAD TO
   SOME POTENTIAL FOR SEVERE HAIL/WIND.

   ...NEW ENGLAND AND PARTS OF COASTAL NORTHEAST STATES...
   UNCERTAINTIES EXIST REGARDING THE EXTENT OF ONGOING EARLY DAY
   PRECIPITATION/CLOUD COVER AHEAD OF AN EASTWARD-MOVING COLD
   FRONT...BUT IT APPEARS THAT THERE WILL BE AT LEAST SOME POTENTIAL
   FOR STORMS TO DIURNALLY INTENSIFY AHEAD OF THE FRONT TUESDAY
   AFTERNOON. SHOULD THIS OCCUR...A STRONGLY SHEARED ENVIRONMENT COULD
   CONTRIBUTE TO ORGANIZED STORM MODES WITH SOME SEVERE WIND/HAIL
   POSSIBLE.

   ...LOWER MS RIVER VALLEY/SOUTHEAST STATES/CAROLINAS...
   CORRIDORS OF MODERATE DESTABILIZATION ARE EXPECTED TO THE SOUTH OF A
   SLOW-MOVING/STALLING FRONTAL BOUNDARY AND RELATED PRIOR-DAY
   CONVECTION. WHILE OVERALL FORCING FOR ASCENT/VERTICAL SHEAR WILL BE
   WEAK...SOME STRONGER PULSE-TYPE STORMS CAPABLE OF DOWNBURSTS WILL BE
   POSSIBLE.

   ..GUYER.. 06/07/2015

   CLICK TO GET WUUS03 PTSDY3 PRODUCT

   NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z