Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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000 FXUS63 KOAX 211734 AFDOAX Area Forecast Discussion National Weather Service Omaha/Valley NE 1234 PM CDT Tue Mar 21 2017 .SHORT TERM...(Today through Thursday) Issued at 338 AM CDT Tue Mar 21 2017 Mid-level frontogenetic band of showers continues to move southeast across southern South Dakota/northern Nebraska. Forecast soundings across the northern CWA show quite a bit of dry air to overcome before any precipitation reaches the ground but eventually we could wet-bulb down allowing some light snow to mix across northeast Nebraska this morning. Precipitation should be rather brief as this mid-level band quickly drifts east but could drop a narrow band of an inch of snow across our northern CWA. Dry conditions are expected by early this afternoon with easterly flow at the surface around large surface high pressure moving east across the Great Lakes region. Will continue a small chance of pcpn Wednesday morning as isentropic upglide increases in mid-level warm air advection region across north central and northeast Nebraska. Forecast soundings indicate primarily snow but this should be short-lived and minor, if any, snowfall accumulations. By Wednesday night, a deepening trough over the Great Basin is forecast to close off and move northeast into the Rockies. Ahead of this, increasing southerly flow will draw moisture north from the Gulf with scattered showers/drizzle likely developing Thursday in strong warm air advection regime. .LONG TERM...(Thursday night through Monday) Issued at 338 AM CDT Tue Mar 21 2017 Active weather is expected into the early part of the weekend as potent and nearly vertically stacked low ejects into Kansas/Oklahoma. Scattered thunderstorms look possible into Friday afternoon before cold front drops south behind the system Friday night leaving the area in the cool sector into the early part of the weekend. Another system will be quick to move into the Plains by Sunday night allowing a continuation of pcpn chances into early next week. && .AVIATION...(For the 18Z TAFS through 18Z Wednesday afternoon) Issued at 1230 PM CDT Tue Mar 21 2017 Band of mixed precip that tracked across the area prior to 18Z had moved east and south of the TAF sites at the start of the period. MVFR cigs are expected to prevail through 21Z with VFR conditions developing 21Z to 00Z and then prevail for the remainder of the period. && .OAX WATCHES/WARNINGS/ADVISORIES... NE...None. IA...None. && $$ SHORT TERM...Kern LONG TERM...Kern AVIATION...Fobert

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