Severe Storm Outlook Narrative (AC)
Issued by NWS
ACUS03 KWNS 070822
SPC AC 070821
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0221 AM CST Wed Dec 07 2016
Valid 091200Z - 101200Z
...NO THUNDERSTORM AREAS FORECAST...
Thunderstorms are not expected Friday through Friday night.
The longwave trough moving into the eastern states on Thursday will
remain progressive during day 3 as it shifts off the U.S. east coast
by Friday evening. Meanwhile, low-amplitude to nearly zonal
upstream flow will develop across the contiguous states. Height
falls are forecast across Washington and Oregon to the northern
Rockies as a Pacific trough advances inland Friday afternoon through
Offshore low-level flow into the Gulf of Mexico will be maintained
as a large anticyclone shifts east encompassing much of the U.S.
east of the Mississippi Valley. This will continue to shunt
moisture equatorward into the southern portions of the Gulf Basin,
precluding moisture return, while this expected synoptic pattern
inhibits thunderstorm development.