Area Forecast Discussion
Issued by NWS Grand Forks, ND

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971
FXUS63 KFGF 252340
AFDFGF

Area Forecast Discussion
National Weather Service Grand Forks ND
640 PM CDT Mon Sep 25 2017

.SHORT TERM...(This evening through Tuesday)
Issued at 255 PM CDT Mon Sep 25 2017

Upper low to propagate east from the northern high plains across
the forecast area overnight and Tuesday. As it does an associated
surface low will lift ne along the boundary to our east from IA
to the western great lakes. Question will be how far west wrap
around -ra gets into our forecast area. CAM guidance in
reasonable good agreement in bringing -ra back into the east and
south between 03-06z time frame then slowly spreading north and
west. Model guidance indicating best potential across the
remainder of the forecast area from 12-18z Tuesday with upper low
passage. With the track of the upper low over the fa and surface
high ridging into the dakotas rain coverage somewhat in question
so will go with chance pops at this point. Will keep higher pops
across the east closer to surface inverted trough. Clouds will
keep temperatures close to what we have seen the past couple of
days.

.LONG TERM...(Tuesday night through Monday)
Issued at 255 PM CDT Mon Sep 25 2017

Rain should gradually diminish Tuesday night as upper low
continues to propagate northeast. Clearing will have an impact on
how low temperatures get however overall minimum temperatures
should be a few degrees either side of 40.

Improving conditions Wednesday with high pressure building into
the northern plains. Low level westerly flow and potential for
solar should allow temperatures to recover into the 60s and could
reach 70 over the west. At this point with warmer column and light
westerly flow not anticipating any frost potential.

Guidance has come into better agreement with the upper level system
moving into the Great Lakes region along with the cold front moving
through from the north Thursday. However, a drier scenario is now
being forecasted by guidance. Still leaving some chance for rain
mainly in Minnesota counties. The Manitoba/Ontario surface high will
drop into the area behind Thursday`s cold front with its dry
influence lasting through Friday into the weekend. There remains
some chance of patchy frost Friday morning in northern Minnesota,
although confidence still remains low with this potential. As the
surface high moves to the southeast, southerly return flow will
allow for milder temperatures this weekend with highs in the 60s,
possibly 70s for counties closer to the tri-state area. As the
surface high strengthens to the southeast, gusty southerly winds
will be felt mainly during afternoons over the weekend. Guidance
indicates a cold front approaching from the west around the Sunday
into early Monday timeframe. This will increase rain chances. It is
too far out into the period to confidently say if there will be
thunderstorms with this front. Overnight lows throughout the period
will generally be in the 40s.

&&

.AVIATION...(For the 00Z TAFS through 00Z Tuesday evening)
Issued at 636 PM CDT Mon Sep 25 2017

Widespread MVFR cigs continue across the northern tier tonight
with cigs across NW Minnesota slowly becoming IFR this evening.
There are some breaks north and west of DVL that will likely fill
back in overnight...and the VFR cigs will fall into the MVFR
range. Much like the last two nights, all sites may improve one
cig category for short durations at best.

&&

.FGF WATCHES/WARNINGS/ADVISORIES...
ND...None.
MN...None.
&&

$$

SHORT TERM...Voelker
LONG TERM...CJ/JK/Voelker
AVIATION...Speicher



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