[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 280550
SWODY1
SPC AC 280549

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1149 PM CST MON FEB 27 2006

VALID 281200Z - 011200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
LARGE VORTEX WILL PERSIST OVER ERN CANADA/NEW ENGLAND THIS
PERIOD...WHILE UPSTREAM A RIDGE PERSISTS ACROSS MUCH OF THE CONUS.

FURTHER W...A TROUGH JUST OFF THE W COAST AT THE START OF THE PERIOD
WILL MOVE ENEWD ACROSS THE WRN U.S./ROCKIES.  THIS TROUGH WILL
DEAMPLIFY WITH TIME...AS IT ENCOUNTERS THE LARGE/PERSISTENT RIDGE.

AT THE SURFACE...LOW PRESSURE WILL DEEPEN/MOVE SEWD ACROSS THE NRN
ROCKIES AND EVENTUALLY INTO THE PLAINS AS WRN UPPER TROUGH ADVANCES.

...CA ACROSS THE GREAT BASIN AND INTO THE NRN ROCKIES...
THOUGH UPPER TROUGH WILL WEAKEN WITH TIME...COMBINATION OF MOIST
SWLY FLOW AHEAD OF THE TROUGH AND COLD TEMPERATURES ALOFT /-28 C AT
H5/ WILL CONTRIBUTE TO NEUTRAL/MINIMALLY-UNSTABLE ENVIRONMENT. AS
TROUGH MOVES ENEWD WITH TIME...LARGE AREA OF PRECIPITATION -- WITH
ISOLATED/EMBEDDED LIGHTNING -- WILL SHIFT ENEWD ACROSS THE GREAT
BASIN AND EVENTUALLY INTO THE NRN ROCKIES.

..GOSS.. 02/28/2006