Area Forecast Discussion
Issued by NWS Grand Forks, ND

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FXUS63 KFGF 121836
AFDFGF

Area Forecast Discussion
National Weather Service Grand Forks ND
1236 PM CST Thu Jan 12 2017

.UPDATE...
Issued at 1230 PM CST Thu Jan 12 2017

Winds as supported by all guidance will steadily drop off through
the remainder of the afternoon as low departs and winds aloft
relax. While there will still be some moderate ground drifting
reducing visibility conditions will continue to improve so will
let all headlines expire on time.

UPDATE Issued at 1003 AM CST Thu Jan 12 2017

Have upgraded to a blizzard warning from roughly Valley City to
Mayville and Crookston northward. E-W roads are the worse with
white out conditions while in town not so bad. Pretty much a
classic ground blizzard event. Surface pressure rise maxima and
strongest cold advection aiding in mixing down 40+ kts to the
surface. Winds aloft slacken significantly early-mid afternoon so
conditions should improve.

UPDATE Issued at 643 AM CST Thu Jan 12 2017

Fcst on track and no changes required attm. Cold front/wind at
1230 UTC Cavalier-Michigan-Carrington ND line moving east. Getting
consistent 40-45 kt gusts and AWOS indicating 1/4 to 1/2SM vsby
just behind front.

&&

.SHORT TERM...(Today and tonight)
Issued at 324 AM CST Thu Jan 12 2017

Waiting and watching the cold front moving southeast around the
sfc low and 500 mb low near Dauphin at 09z. Timing of arrival of
these strong winds a bit slower than we had so coord with BIS and
ABR and some changes were made to headlines. Kept winter wx adv
09z start time DVL basin as gusty SW winds at times ahead of the
front but have end time 21z. Did delay onset of winter wx advisory
in the RRV til 12z and extended it south to the South Dakota
border. End time 21z. Kept wind chill adv til 18z in the eastern
fcst area. Thought process among the surrounding offices is to
hold off on the inevitable wind chill headlines til later today as
still some questions on how far south wind chill warnings will be
needed.

Strong winds approaching the Bottineau-Minot area at 0915z per
mesonet observations. Timing of the strong winds into DVL region
11-12z and then GFK 14z and Fargo area 15-16z. Could have broken
up advisory timing even more but tried to keep it simple as
possible and mention timing of winds arrival in WSW text.

Seeing wind gusts to 50kts in NW ND and SE Sask and there is some
threat for those higher wind gusts into E ND. Hard to ignore the
period of 50 kt at 925 mb into NE/ECNTRL ND. Something to watch.
Didnt go that high in the wind gusts grids...but have nr 40ks.

Will watch for blizzard conditions but agree with BIS that white
out conditions psbl but lasting 1-2 hours as that is what happened
in SE Sask.

Winds diminish quickly this evening and a cold night with lows mid
-20s to lower -30s. Did once again go lower than superblend and
toward the colder CONSMOS guidance for the typical cold spots
around Bemidji/Park Rapids/Fosston where 30s below seems much
easier to get. High pressure ridge is moving a bit faster now and
all but the far east is in southerly return flow by 12z Fri. Thus
coldest temps in the RRV and E ND may be more 06z-09z then steady
or a bit of rise. This reflected in hourly T grids. Still though
do get -40 to -45F wind chills tonight nrn 2/3 of the fcst area.
Will continue to hit this in social media/HWO/Top news.

.LONG TERM...(Friday through Wednesday)
Issued at 324 AM CST Thu Jan 12 2017

Warm up starts Friday with increasing south winds with gradual
temp rise into Saturday.

Sunday through Thursday...
A mainly tranquil period is forecast as the overall upper level
pattern trends toward a split flow...with the northern stream
initially in central Ontario and the southern stream across the
central and southern plains. Pattern eventually indicates a Rex
block over the intermountain west...which will push the northern
stream farther north allowing warm ridging to set up over the
Dakotas. Therefore...will keep conditions dry through the
period...and should see temperatures rebounding to near the freezing
mark by the end of the period.

&&

.AVIATION...(For the 18Z TAFS through 18Z Friday afternoon)
Issued at 1230 PM CST Thu Jan 12 2017

visibility in blsn will continue to improve through the afternoon
and should be unrestricted by 00z. Some isold mvfr cigs but these
should dissipate by late afternoon with vfr conditions through the
brunt of the period.

&&

.FGF WATCHES/WARNINGS/ADVISORIES...
ND...Blizzard Warning until 1 PM CST this afternoon for NDZ006>008-
     014>016-024-026>030-038-054.

     Winter Weather Advisory until 3 PM CST this afternoon for NDZ039-
     049-052-053.

MN...Blizzard Warning until 1 PM CST this afternoon for MNZ001-004-
     007.

     Winter Weather Advisory until 3 PM CST this afternoon for MNZ002-
     003-005-008-013>015-029.

&&

$$

UPDATE...Voelker
SHORT TERM...Riddle
LONG TERM...Hopkins/Riddle
AVIATION...Voelker



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