Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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FXUS63 KOAX 272002

Area Forecast Discussion
National Weather Service Omaha/Valley NE
302 PM CDT Thu Jul 27 2017

.SHORT TERM...(Tonight through Sunday)
Issued at 301 PM CDT Thu Jul 27 2017

A short-wave trough moving into northern MN as of early afternoon
will amplify while translating southeast across the Great Lakes
tonight and Friday. This upper-air system will be attended by a
reinforcing surge of continental-polar air which will maintain a
prominent surface ridge from the Great Lakes into mid MO Valley
through this weekend. Weak disturbances aloft will crest the mid-
level ridge axis over the northern Plains before diving southeast
through into the mid MS Valley. Precipitation associated with
these features will largely remain confined to the High Plains.
The net result of these developments is a generally dry and mild
weather pattern over the area through the short-term forecast

.LONG TERM...(Sunday night through Thursday)
Issued at 301 PM CDT Thu Jul 27 2017

A large-scale pattern characterized by ridging over western North
America with downstream troughing in the east is expected to
persist through the extended range. Similar to the short-term
period, the best precipitation chances will be over the High
Plains. A potential exception will be around the middle of next
week when some model guidance suggests that a weak cool front
could focus a few showers and thunderstorms across the mid MO
Valley. Confidence in this scenario remains low at this juncture.
Otherwise, seasonally mild conditions will continue.


.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1234 PM CDT Thu Jul 27 2017

VFR conditions through the period.




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