DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 060650
SWODY3
SPC AC 060649

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0149 AM CDT SAT OCT 06 2012

VALID 081200Z - 091200Z

...SYNOPSIS...
MODELS INDICATE THAT THE EASTERN PACIFIC BLOCKING PATTERN MAY BEGIN
TO WEAKEN DURING THIS PERIOD...WITH A CLOSED LOW GRADUALLY MIGRATING
INTO THE CALIFORNIA COAST. BUT NOT MUCH CHANGE IS EXPECTED YET
DOWNSTREAM...WITH AMPLIFIED UPPER TROUGHING PERSISTING WITHIN
CONFLUENT BELTS OF WESTERLIES EAST OF THE ROCKIES THROUGH THE
ATLANTIC SEABOARD. IN THE MORE PROMINENT NORTHERN STREAM...A STRONG
SHORT WAVE TROUGH IS FORECAST TO DIG INTO THE CENTRAL CANADIAN/U.S.
BORDER AREA...WITH A SIGNIFICANT SURFACE CYCLONE MIGRATING FROM
MANITOBA INTO QUEBEC...AND ANOTHER COLD FRONT SURGING THROUGH THE
NORTHERN PLAINS. HOWEVER... MOISTURE RETURN IN THE WAKE OF THE
PREVIOUS FRONT...WHICH IS EXPECTED TO EXTEND OFF THE ATLANTIC COAST
INTO THE EASTERN GULF OF MEXICO BY EARLY MONDAY...PROBABLY WILL NOT
BECOME SUFFICIENT TO SUPPORT AN APPRECIABLE RISK FOR THUNDERSTORM
ACTIVITY. WITH THE EXCEPTION OF PERHAPS PARTS OF THE FLORIDA
PENINSULA...CONVECTIVE POTENTIAL ACROSS MUCH OF THE NATION WILL
REMAIN LOW TO NEGLIGIBLE.

..KERR.. 10/06/2012

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