Area Forecast Discussion
Issued by NWS Duluth, MN

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FXUS63 KDLH 192117
AFDDLH

Area Forecast Discussion
National Weather Service Duluth MN
417 PM CDT Mon Jun 19 2017

.SHORT TERM...(This evening through Tuesday)
Issued at 417 PM CDT Mon Jun 19 2017

Persistent upper-level trough will slowly drift eastward tonight
and Tuesday. Partly to mostly cloudy skies, with scattered rain
showers and isolated thunderstorms can be expected this evening.
Patchy fog may develop as winds diminish tonight. Ridging aloft
and surface high pressure will move toward the area on Tuesday,
but not before a potent shortwave trough slides southeastward
across northwest and central Minnesota late tonight and Tuesday
morning. Another round of showers will accompany the trough mainly
affecting our southwestern and southern zones. High pressure
moving into the west during the morning will work to erode the
cloud cover and bring an end to precipitation for most areas.
Enough cyclonic flow and cool air aloft should remain in place
over northeast Minnesota and portions of northern Wisconsin to
support another round of isolated showers and thunderstorms,
mainly during the afternoon hours. Temperatures will remain below
normal through Tuesday due in large part to the cooler air aloft
and cloud cover.

.LONG TERM...(Tuesday night through Monday)
Issued at 417 PM CDT Mon Jun 19 2017

Quiet weather is expected for Tuesday night with a weak ridge
axis over the forecast area. Have lowered min temperature forecast
slightly as we should get some good radiational cooling
conditions. This quiet won`t last very long as a potent shortwave
is due to dive through the area on Wednesday and Wednesday night,
which should bring a round of showers and thunderstorms through
the area. Models are getting a more consistent handle on this
feature, but there are still differences in timing and track. Have
raised POPs over consensus to reflect the now several runs of
models consistently showing this feature.

From Thursday on out, have less confidence in the forecast, with
a broad upper level trough over the central CONUS with a series of
shortwaves that move through the trough. The models vary greatly
in the phasing and track of these waves, introducing some pretty
significant uncertainty into the precipitation forecast. For now
have gone with a consensus forecast which is pretty much slight or
low chance POPs for Friday through next Monday. This not terribly
out of the ordinary it being June, but as we get closer in time
we should be able to pick out some dry periods. With the northwest
flow and troughing going on aloft, expect near to below normal
temperatures for Friday through Monday.

&&

.AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon)
Issued at 1238 PM CDT Mon Jun 19 2017

Northwest flow continues over the area with a strong low over
James Bay. Initial VFR conditions at most locations as of 18Z
excepting the MVFR ceilings for KINL. Expect the ceilings to
gradually improve at KINL as well, returning to VFR by 21Z.
Another round of showers and a few thunderstorms to begin moving
through the terminals after 03Z, bringing a period of occasional
MVFR ceilings and visibilities in -SHRA. This period to end for
the terminals by 15Z, followed by a return to VFR conditions.

&&

.PRELIMINARY POINT TEMPS/POPS...
DLH  50  69  49  71 /  30  30   0  30
INL  47  68  44  72 /  20  20   0  40
BRD  51  71  50  75 /  60  10  10  40
HYR  49  70  46  76 /  40  40   0  20
ASX  50  70  48  74 /  50  40   0  20

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
WI...None.
MN...None.
LS...None.
&&

$$

SHORT TERM...Huyck
LONG TERM...LE
AVIATION...LE



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