Area Forecast Discussion
Issued by NWS Grand Forks, ND

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177
FXUS63 KFGF 182332
AFDFGF

Area Forecast Discussion
National Weather Service Grand Forks ND
632 PM CDT Tue Jul 18 2017

.UPDATE...
Issued at 632 PM CDT Tue Jul 18 2017

The smoke across the area is much more visible today than it was
yesterday. This smoke will likely be around in some degree for
much of the work week. Otherwise, the night looks quiet, with
light winds and only a few clouds.

&&

.SHORT TERM...(This evening through Wednesday)
Issued at 250 PM CDT Tue Jul 18 2017

Forecast challenges continue to be rain chances along with
temperatures. Drier airmass will continue to spread south across
the forecast area as surface high pressure builds into the fa.
Precipitable h2o values around 3/4 of an inch should be common by
morning and surface dewpoints should bottom out in the low to mid
50s. With SKC and light winds temperatures should be able to drop
off into the 50s.

Return flow, warm advection and low level moisture flux all
increase during the day Wednesday. Main question will be pcpn/storm
potential. Models differ on where boundary will set during the
day as a short wave propagates through relatively zonal flow. At
this time the best potential looks to be from the southern half
of the forecast area southward into South Dakota. With uncertainty
kept pops relatively low. With warm advection and initial solar,
temperatures should recover to at or above average.

.LONG TERM...(Wednesday night through Tuesday)
Issued at 250 PM CDT Tue Jul 18 2017

A wave will depart the area Wednesday night with some lingering
showers in its wake. Behind the system, surface high pressure will
dominate at least through Thursday night when another weak
disturbance is expected to trigger a few showers and maybe a storm.
A more vigorous wave will impact the area later Friday evening
through Saturday, bringing better chances for stronger storms and
the situation will be monitored. As the system departs on Saturday
night, expect temperatures to be more seasonal by Sunday...with
highs in the 70s...and a gradual warming trend with drier weather
beyond through the end of the period.

&&

.AVIATION...(For the 00Z TAFS through 00Z Wednesday evening)
Issued at 632 PM CDT Tue Jul 18 2017

Nice flying weather until sometime on Wednesday, when convective
chances pick up again. At this point, KFAR looks like it will be
impacted more than the other TAF sites. However, trying to nail
down exactly when that arrives is pretty difficult at this point.
There could be some morning convection around and more in the
afternoon. For now, think the best chances should be in the
afternoon, but will only mention VCTS for now.

&&

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

$$

UPDATE...Godon
SHORT TERM...Voelker
LONG TERM...Hopkins
AVIATION...Godon



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