Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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000 FXUS63 KOAX 081736 AFDOAX Area Forecast Discussion National Weather Service Omaha/Valley NE 1136 AM CST Fri Dec 8 2017 .SHORT TERM...(Today through Sunday) Issued at 309 AM CST Fri Dec 8 2017 A positively tilted, multi-stream trough from Ontario to northwest Mexico will advance southeast in response to the progression of an upstream perturbation from northern Manitoba into the upper-MS Valley today and the mid-MS/lower-OH Valleys tonight. In the low levels, a cold front will move through the area this morning along with increasing low to mid-level clouds. Radar data as of 09z indicate increasing reflectivities aloft, along the leading edge of denser cloud cover. While a few morning flurries are possible, the presence of a dry low-level environment will result in the sublimation of most of the falling precipitation. The post-frontal cold advection coupled with the increasing clouds will limit daytime heating with today`s highs in the mid to upper 30s. Tonight into Saturday, our area is only glanced by the next surge of colder low-level air associated with the Manitoba-MS Valley disturbance mentioned above. Highs on Saturday will range from around 30 to the lower 30s in our IA counties to upper 30s to around 40s across the counties in the western part of our area. By Sunday, mid-level heights will build slightly with considerable low-level warm advection translating to afternoon temperatures warming into the 50s. .LONG TERM...(Sunday night through Thursday) Issued at 309 AM CST Fri Dec 8 2017 Sunday night into Monday, a short-wave trough and related upper- level jet streak will progress from the lee of the Canadian Rockies through the mid-MO Valley in conjunction with a strong surface cold front. Similar to this past Monday, we could see early-day highs being reached with temperatures falling through the afternoon with strong northwest winds. We will remain on the western periphery of a broad long-wave trough through the upcoming work week with the coldest low-level air remaining to our east. In general, highs will be near or slightly above normal with continued dry conditions. && .AVIATION...
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(For the 18Z TAFS through 18Z Saturday afternoon) Issued at 1114 AM CST Fri Dec 8 2017 Latest sfc obs were revealing MVFR cigs were migrating slowly southward over eastern NE. The low cigs have already reached KOFK/KLNK, and just a matter of time now before reaching KOMA. Expect that MVFR cigs will hang tight at all terminals through this afternoon before improvement to VFR by late afternoon/early evening.
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&& .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && $$ SHORT TERM...Mead LONG TERM...Mead AVIATION...DEE

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