DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 130907
SWOD48
SPC AC 130906

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0306 AM CST FRI DEC 13 2013

VALID 161200Z - 211200Z

...DISCUSSION...
A BENIGN PATTERN FOR THUNDERSTORMS WILL CONTINUE INTO THE D4-D6
PERIOD WITH COOL AND/OR DRY AIR ACROSS MUCH OF THE COUNTRY DUE TO A
MEAN ERN UPPER TROUGH AND HIGH PRESSURE OVER THE CNTRL AND ERN
STATES.

SOMETIME AROUND THE D6-D7 PERIOD...MODELS INDICATE A PATTERN CHANGE
WITH A LARGE-SCALE TROUGH DEVELOPING OVER THE WRN CONUS AND RISING
HEIGHTS OVER THE E. THIS WILL ALLOW MOISTURE AND INSTABILITY TO
DEVELOP BY AROUND D8 INTO THE SRN PLAINS AND LOWER MS VALLEY. WHILE
INSTABILITY COURTESY OF UPPER 60S F DEWPOINTS AND SUBSTANTIAL DEEP
LAYER WIND FIELDS ARE FORECAST ACROSS THE WARM SECTOR...FORCING WILL
LIKELY BE LINEAR IN NATURE DUE TO A RAPIDLY SURGING ARCTIC FRONT.
THIS...COMBINED WITH LOW PREDICTABILITY...WILL PRECLUDE ANY SEVERE
AREAS.

..JEWELL.. 12/13/2013

+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.