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000
FXUS63 KBIS 191233
AFDBIS

Area Forecast Discussion
National Weather Service Bismarck ND
733 AM CDT Thu Apr 19 2018

.UPDATE...
Issued at 731 AM CDT Thu Apr 19 2018

Expanded Dense Fog Advisory further east into Burleigh, Sheridan,
Wells, McHenry and Pierce counties as webcams and surface weather
stations are showing visibilities near zero in dense fog.

UPDATE Issued at 646 AM CDT Thu Apr 19 2018

Issued a dense fog advisory for the northwest Quarter of North
Dakota through 11 am CDT.

UPDATE Issued at 532 AM CDT Thu Apr 19 2018

Minor update to expand fog across western and central North Dakota
through the morning hours. Some locations could see visibility
down to 1/4 mile at times.

&&

.SHORT TERM...(Today and tonight)
Issued at 330 AM CDT Thu Apr 19 2018

Widespread fog is the main highlight in the short term.

Light winds combined with a lowering stratus deck is leading to
widespread fog across most of western and portions of central
North Dakota early this morning. Fog will likely continue through
the morning hours.

Temperatures will be similar to yesterday`s. Clouds will clear out
and plenty of sun will lead to temperatures in the 40s and 50s
across the area. Remaining snowpack will continue to rapidly melt.

.LONG TERM...(Friday through Wednesday)
Issued at 330 AM CDT Thu Apr 19 2018

A pattern change to warmer temperatures and drier weather will
overtake western and central North Dakota this weekend.

Saturday and Sunday look very nice with temperatures in the 60s
for most locations. There may be some minor fire concerns possible
Sunday/Monday with low humidity and breezy winds around 20 mph.

Compressional warming with the presence of a front nearby Sunday
will likely lead to high temperatures that are noticeably higher
than what a lot of the forecast guidance suggests. Model snow
depth values remain to high compared to observations, which is
keeping the forecast temperatures too low. In addition, bias-
corrected model guidance is too cold as well, since this data is
corrected based off the cold pattern we`ve been in lately and
doesn`t correlate with the warmer pattern change. For this reason
high temperatures were increased over most guidance values.

A potent shortwave will swing through North Dakota from the west
on Monday through Tuesday, leading to chances for rain and
possibly mixed with snow overnight across southern North Dakota.
Conditions look to dry back out for Wednesday as a ridge tries to
build back in.

&&

.AVIATION...(For the 12Z TAFS through 12Z Friday morning)
Issued at 618 AM CDT Thu Apr 19 2018

High pressure over the region will maintain light winds through
the 12Z TAF period. Hazards to aviation focus on LIFR conditions
in FOG and low clouds KISN-KMOT-KDIK through 15z, then conditions
improving to VFR thereafter.


&&

.BIS WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 11 AM CDT /10 AM MDT/ this morning for
NDZ001>003-009>013-017>023-032>035.

&&

$$

UPDATE...TK
SHORT TERM...AJ
LONG TERM...AJ
AVIATION...WAA