Area Forecast Discussion
Issued by NWS North Platte, NE

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FXUS63 KLBF 201955

Area Forecast Discussion
National Weather Service North Platte NE
255 PM CDT Mon Mar 20 2017

Issued at 252 PM CDT Mon Mar 20 2017

At H5 closed low over the northeast Pacific with a ridge into
Juneau. Trough from north central Canada into the Dakotas flattening
the ridge over the lower 48 and then a closed low off the Atlantic


.FORECAST...(This evening through Monday)
Issued at 252 PM CDT Mon Mar 20 2017

Models in good agreement in the near term but having some timing
problems in the mid periods as upper low moves into plains Thursday
and Friday. For tonight a cold front will move south into northern
Nebraska with areas of light snow with some one to two inch
accumulations from Cody over to Oneill. Winds out of the east around
10kts should not present much of a problem and with temperatures in
the 30s will leave any kind of highlights out for now. Tuesday
temperatures will range from the 30s north to around 50 southwest. A
stronger wave will eject out of the upper trough over the west coast
and bring showers to the eastern plains of Colorado and Wyoming
Tuesday afternoon then spreading into western Nebraska over night.
Early on rain then rain and snow mixed changing over to all snow
after midnight. There is the possibility for some patchy freezing
type precipitation over the northwest as temperatures cool but
have left out for now. Snow amounts may warrant some headlines
over north central late tomorrow night into early Wednesday
morning. Temperatures rise into the mid 40s north central to the
60s over the Panhandle as the upper wave moves east through the
day on Wednesday. Wednesday night as upper low approaches 4
corners warm air advection across western Nebraska with diffluence
aloft chances of rain increase with patchy snow a possibility as
temperatures hover in the mid 30s. Have held off mention of T
until Thursday afternoon but instability aloft could hear some
thunder Thursday morning. As upper closed low rolls onto the
central plains late Thursday evening an area of deformation
develops over the Sandhills with definite pops retained. This is
still a ways out but trend has continued the last several days for
up to an inch of rainfall. Dynamic cooling could see some
changeover to snow through the early morning hours. Have left all
rain for now. Precipitation ending Friday with temperatures
warming into the 50s and 60s through the weekend with slight
chances for rain Sunday.


.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 132 PM CDT Mon Mar 20 2017

Visual flight rules over western Nebraska this afternoon and early
evening. A cold front will move south into northern Nebraska early
Tuesday morning with areas of snow along and north of a line from
KIEN to KONL into Tuesday morning. In these areas of snow expect
MVFR ceilings and visibilities.




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