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Area forecast discussion 
National Weather Service Grand Forks ND
324 am CST Sat Dec 20 2014

Short term...(today through sunday)
issued at 315 am CST Sat Dec 20 2014

Forecast challenge continues to be light precipitation chances/phase
through the weekend and temperatures. Models in fair agreement and
will use blend. Weak waves will continue to rotate around
persistent upper low over mb/Ontario border area.

Next wave getting ready to enter northwest forecast area with another slated for
late afternoon and tonight. From model time sections moisture
shallow and forcing weak so looks to be continued mainly
fzdz/flurry threat. Upstream Brandon reporting fzdz so will
continue with current headlines through the morning. Temperatures
will be starting out mild but with clouds holding only minor
recovery expected.

Slightly better potential for some light accumulations tonight so
will keep low probability of precipitation going. Best potential will be over NE forecast area closer
to favored upper support. With cloud cover minimum temperatures
will continue on the mild side.

Could see some lingering -sn across the far NE Sunday am otherwise
brunt of day should be dry. Weak southerly flow and slightly
warmer column should allow for temperatures to recover a few
degrees either side of 32f.

Long term...(sunday night through friday)
issued at 315 am CST Sat Dec 20 2014

Stronger wave starts to deepen trough over the north central US with
low pressure organizing somewhere in the Dakotas Sunday night/Monday.
Models continue to differ on how this low evolves and tracks but
looking much better for white Christmas across the region with
potential for accumulating snowfall and travel issues starting
later on Monday. Fortunately at this point thermal profiles pointing
at mainly snow vs mix but this will need to be monitored.

Tuesday-Friday...surface low pressure over the western Great Lakes will
intensify over the eastern Great Lakes for mid-week. Some residual
light snow will persist during this time into our area on the
western flank of the system. Winds may be gusty on
Tuesday...although models still show varying solutions with surface
features/location of strongest winds. As the low slowly moves east
by Christmas evening into Christmas day...surface ridging is expected to
push into the northern plains...bringing drier weather. Beyond this
time...models diverge in handling the next shortwave trough ejecting
out of The Rockies...with the 00z European model (ecmwf) indicating stronger surface
cyclone development from the Southern Plains into the western Great
Lakes for late week and the GFS weaker/more progressive. Still a
great deal of uncertainty at this range. Mild temperatures are forecast to
cool down to below average by late week.


Aviation...(for the 06z tafs through 06z Saturday night)
issued at 1134 PM CST Friday Dec 19 2014

IFR to LIFR conditions will persist through much of this taf
period...possibly improving Saturday afternoon. Patchy freezing
drizzle also possible...but expected coverage not high enough to
include in the taf. Do have lower visibility and br...which should cover
this aspect. Winds will be light.


Fgf watches/warnings/advisories...
ND...Winter Weather Advisory until noon CST today for ndz006>008-

Minnesota...Winter Weather Advisory until noon CST today for mnz001-002-



Short term...voelker
long term...makowski/voelker

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