SWOD48
SPC AC 210838
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0338 AM CDT THU JUL 21 2011
VALID 241200Z - 291200Z
...DISCUSSION...
NO APPRECIABLE CHANGES TO THE OVERALL UPR FLOW REGIME IS EXPECTED
INTO THE MEDIUM RANGE. SPRAWLING UPR HIGH WILL SPAN THE SRN STATES
WITH THE PROGRESSIVE WLYS ALONG THE NRN TIER OF THE COUNTRY. A
MID-LEVEL WAVE THAT IS EXPECTED TO SKIRT ACROSS THE UPR MS VLY/GREAT
LAKES REGION ON SUN /DAY 4/ WILL CONTINUE DOWNSTREAM AND REINFORCE
THE BROAD UPR TROUGH ALREADY IN PLACE ACROSS THE NERN SEABOARD EARLY
NEXT WEEK. MEANWHILE...A NEW DISTURBANCE WILL DROP INTO THE PAC NW
AND THEN EJECT NEWD TOWARD THE NRN PLAINS BY MON-TUE /DAY
5-6/...MUCH LIKE IT/S PREDECESSORS. THE TIMING AND AMPLITUDE OF
THESE SYSTEMS IS PORTRAYED DIFFERENTLY AMONG MEDIUM RANGE GUIDANCE
AND RENDERS A LOW PREDICTABILITY PATTERN. THUS...NO SVR WEATHER
HIGHLIGHTS ARE JUSTIFIED ATTM.
..RACY.. 07/21/2011
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