Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

FXUS63 KOAX 180827

Area Forecast Discussion
National Weather Service Omaha/Valley NE
327 AM CDT Wed Oct 18 2017

.SHORT TERM...(Today through Friday)
Issued at 323 AM CDT Wed Oct 18 2017

Continued dry and warm through Friday.

Weak west/northwest flow aloft will continue today as a weak
upper level ridge slides east across the Southern Plains. A strong
shortwave trough moving across the Canadian Prairie Provinces
will allow a cold front to drop southeast and weaken as it moves
across our area this afternoon bringing primarily a wind shift
and perhaps some better mixing along the boundary during peak
heating. Highs today should range from the mid to upper 70s.

A large area of surface high pressure is forecast to build overhead
tonight into early Thursday with return southerly flow increasing
during the day Thursday.  By Thursday night, strong theta-e
advection is expected ahead of an approaching shortwave trough over
the southwestern US. This trough tends to weaken as it slides
northeast into late Friday however a stronger trough will quickly
move east out of the Pacific Northwest and into the northern High
Plains by early Saturday. At the surface, the associated frontal
boundary will extend from the eastern Dakotas southwestward into
low pressure over northern Kansas. A strengthening low-level jet
overnight Friday into Saturday could aid in nocturnal
thunderstorms over the area. Thunderstorms look to become more
widespread through the day Saturday as the strong front dives
southeast across the forecast area.

.LONG TERM...(Friday night through Tuesday)
Issued at 323 AM CDT Wed Oct 18 2017

Precipitation should be quick to clear from west to east Saturday
evening as the upper trough axis shifts east of the forecast area.
Moderating temperatures are expected into next week as a
deepening trough to our east keeps the colder temps across the
eastern third of the US.


.AVIATION...(For the 06Z TAFS through 06Z Wednesday night)
Issued at 1118 PM CDT Tue Oct 17 2017

VFR conditions expected through the fcst pd.




AVIATION...DEE is the U.S. government's official web portal to all federal, state and local government web resources and services.