Severe Storm Outlook Narrative (AC)
Issued by NWS
ACUS01 KWNS 091941
SPC AC 091940
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0140 PM CST Fri Dec 09 2016
Valid 092000Z - 101200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
The risk for severe storms appears negligible across the U.S. today
No changes are needed with this outlook issuance.
.PREV DISCUSSION... /ISSUED 0958 AM CST Fri Dec 09 2016/
Although cold surface ridging will remain prominent across most
areas east of the Rockies through this period, mid/upper flow has
trended more zonal within a belt from the mid-latitude eastern
Pacific through the Mid Atlantic Coast and western Atlantic. One
significant, but increasingly deformed/sheared impulse within this
regime will begin developing inland across the Pacific Northwest
coast later today. Associated pockets of colder air aloft and
large-scale forcing for ascent, in conjunction with relatively moist
low-level onshore flow, are expected to contribute to convective
development occasionally capable of generating lightning, mainly
west of the Washington Cascades. Otherwise, thunderstorm
probabilities elsewhere across the U.S. appear negligible.