Saturday, October 22, 2011

DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 220719
SWODY3
SPC AC 220718

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0218 AM CDT SAT OCT 22 2011

VALID 241200Z - 251200Z

...SYNOPSIS...
A PROGRESSIVE LOW-AMPLITUDE LONGWAVE PATTERN OVER THE CONUS WILL
BEGIN TO UNDERGO A MODEST DEGREE OF AMPLIFICATION ON MONDAY. A
FAST-MOVING UPPER TROUGH AND AN ASSOCIATED COLD FRONT IS EXPECTED TO
SPREAD EASTWARD ACROSS ONTARIO/QUEBEC AND THE NORTHEAST CONUS...WITH
AT LEAST ISOLATED TSTMS POSSIBLE ACROSS THE LOWER GREAT LAKES
VICINITY/NORTHEAST STATES. TSTMS MAY ALSO BE POSSIBLE LATE MONDAY
NIGHT ACROSS PORTIONS OF THE UPPER MIDWEST/UPPER MS VALLEY VICINITY
AS A WARM ADVECTION REGIME INTENSIFIES IN ADVANCE OF AN ADDITIONAL
SHORTWAVE TROUGH CROSSING THE NORTHERN ROCKIES/HIGH PLAINS. IN
EITHER CASE...SEVERE TSTMS ARE NOT EXPECTED AS GENERALLY
ATTRIBUTABLE TO MEAGER MOISTURE/BUOYANCY.

..GUYER.. 10/22/2011

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