Area Forecast Discussion
Issued by NWS Omaha/Valley, NE

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FXUS63 KOAX 250851

Area Forecast Discussion
National Weather Service Omaha/Valley NE
351 AM CDT Tue Apr 25 2017

.SHORT TERM...(Today through Thursday)
Issued at 339 AM CDT Tue Apr 25 2017

Scattered showers with a few isolated thunderstorms will continue to
spread over portions of the forecast area this morning ahead of an
approaching upper-level shortwave trough over central Wyoming. A
surface cold front has pushed through a majority of the forecast
area this morning and is expected to extend just to our southeast
across northeast Kansas and southwest Iowa through a good portion
of the day as surface low pressure along the Kansas/Oklahoma
border works its way slowly northeast along the front. Additional
widespread showers are expected through the day ahead of the upper
wave as it pushes east across South Dakota. In addition, strong
cold air advection will continue today with highs in our northern
counties only rising a few degrees with highs forecast in the mid
to upper 40s. Precipitation should end from northwest to
southeast Wednesday as the upper-level trough axis finally shifts
east of the area. A few snowflakes could mix in with the rain
along the South Dakota border early Wednesday morning but no
accumulation is anticipated.

Have continued mention of patchy frost in our northern counties
Thursday morning with lows in the low 30s. Will continue to
monitor for any headlines that may be needed.

.LONG TERM...(Thursday night through Monday)
Issued at 339 AM CDT Tue Apr 25 2017

Dry conditions are expected Thursday before a series of upper
troughs swing through the region through the weekend. Significant
differences continue with the medium range models with the 00z GFS
giving the area significant precipitation Friday while the 00z
ECMWF remains fairly light with its QPF by keeping the strongest
forcing to our south.

Heading into the weekend, the pattern will remain cool as a
deepening mid/upper level trough digs across the Four Corners
region and quickly moves into eastern Nebraska by Sunday.
Continued precipitation is expected with this system with cold air
working south. Some mix with light snow is possible before the
system exits to the east on Monday.


.AVIATION...(For the 06Z TAFS through 06Z Tuesday night)
Issued at 120 AM CDT Tue Apr 25 2017

Cold front had moved through KLNK prior to 06Z and was moving
through KOMA at that time as well. Front should continue to push
south and east overnight...then may stall. Expect deteriorating
conditions at all three sites later today, at least to the MVFR
category and possibly lower.




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