Area Forecast Discussion
Issued by NWS Bismarck, ND

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

000
FXUS63 KBIS 191552
AFDBIS

Area Forecast Discussion
National Weather Service Bismarck ND
1052 AM CDT Thu Apr 19 2018

.UPDATE...
Issued at 1050 AM CDT Thu Apr 19 2018

Surface weather observations and webcams show fog across western
and central North Dakota rapidly lifting. Improvement is expected
to continue, so the Dense Fog Advisories will be allowed to expire
at 11 AM CDT.

UPDATE Issued at 952 AM CDT Thu Apr 19 2018

Added patchy fog to the forecast for tonight and tomorrow morning
across much of north central and parts of northwest North Dakota.
Both the latest CAM model runs and forecast NAM BUFR soundings
support the redevelopment of fog tonight in these areas, however
it does not look to be as widespread as the dense fog is this
morning.

UPDATE Issued at 932 AM CDT Thu Apr 19 2018

Quick update to expand the Dense Fog Advisory into Bottineau
county per satellite and webcam trends.

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 932 AM CDT Thu Apr 19 2018

Widespread LIFR/VLIFR conditions in fog and stratus this morning
across most of western and central North Dakota slowly improving
through the late morning and early afternoon. MVFR cumulus fields
expected this afternoon.


&&

.BIS WATCHES/WARNINGS/ADVISORIES...
Dense Fog Advisory until 11 AM CDT /10 AM MDT/ this morning for
NDZ001>004-009>013-017>023-032>035.

&&

$$

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



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.