NWS Grand Forks, ND wrote its last area forecast discussion before the first event at Jan 31, 11:00 PM CST, 1 hour earlier. Its key messages:
Area forecast discussion, Jan 31, 11:00 PM CST, 1 hour before
Area Forecast Discussion
National Weather Service Grand Forks ND
1100 PM CST Wed Jan 31 2024
.KEY MESSAGES...
- Dense fog will develop in our area tonight into Thursday
morning. Greatly reduced visibility and potential slick spots
will impact travel conditions tonight into the Thursday
morning commute.
- Minimal (<20%) chances for precipitation over the next 7 days,
and with the warm temperatures, if any precipitation fell it
would primarily be rain
&&
.UPDATE...
Issued at 1100 PM CST Wed Jan 31 2024
Expanded the Dense Fog Advisory to include Norman, Mahnomen, and
the rest of Otter Tail County based on recent observations and
satellite.
Otherwise, previous discussions remain valid.
Issued at 906 PM CST Wed Jan 31 2024...
Surface observations, satellite imagery, and webcams indicate fog
is already developing within the southern Red River Valley into
the western hills of west-central Minnesota. With plenty of time
(6+ hours) for continued, optimal radiational cooling,
confidence is high enough to issue a Dense Fog Advisory for
these locations. This will remain valid through 9 AM, although
confidence in cessation of dense fog is low.
Additional areas within the Red River Valley as well as into
eastern North Dakota west of the Valley are liable to see fog as
well, some of which may be dense. With temperatures dipping
into the 20s tonight, light icing from freezing fog may
contribute to slick spots, adding an additional layer of
potential impacts to travel conditions from fog tonight into
Thursday morning.
Issued at 636 PM CST Wed Jan 31 2024...
With temperatures in the mid 40s to low 50s today, the majority
of locations within our region set daily record high
temperatures today. This includes but not limited to Grand
Forks, Fargo, Devils Lake, Park Rapids, and Baudette. However,
these climatological sites were still 2 to 5 degrees shy of
record high temperatures for the month of January.
Fog is looking likely this evening, particularly within the
southern Red River Valley. Optimal radiational cooling
conditions are forecast here with mostly clear skies and calm
winds. Temperatures cooling into the 20s and lingering moisture
from recent snowmelt should all aid in developing fog, some of
which may be dense. At this time, confidence is low on coverage
of dense fog, so holding off on any headlines for now.
Additional areas of potential fog development include west of
the Red River Valley.
Low stratus from back door cold front moving through Ontario
into eastern Manitoba continues to make its way toward our area,
increasing confidence extensive cloud cover will eventually fill
into our area from northeast to southwest overnight tonight. At
this time not expecting any precipitation to be squeezed out
from this, although can't completely rule it out in the form of
some light mist. Due to low probability of precipitation
(around 10%) and light amounts, not anticipating any impacts
from this.
&&
.DISCUSSION...
Issued at 213 PM CST Wed Jan 31 2024
It is a very springlike day today, with plenty of sun, light
winds, and very mild temperatures. By early afternoon, new
record highs were established at Fargo, the Grand Forks
airport, and the NWS Grand Forks station. Since temperatures are
still rising, the actual new records will probably not be set
until closer to 4 to 5 pm.
With the snowmelt today, fairly light winds expected tonight,
and not a lot of cloud cover, expect some fog to develop again.
Hard to know how extensive or thick it will get, but models are
favoring areas along and south of Interstate 94, and possibly
the Langdon to Devils Lake area. There is a backdoor cold front
that is anticipated to sag southward from southeast Manitoba
late this evening into the overnight hours, which could turn the
lighter winds more northerly. Some low clouds may form and drop
southward behind this boundary. At this point, any cloud cover
dropping southward behind this boundary should stay along or
north of highway 2. The predictability of fog is low, but the
conditions over the next 7 days do not markedly change, so fog
could be possible at times throughout.
Finally, expect minimal (<20%) chances for precipitation over
the next 7 days. There had been a weak signal for early in the
weekend. This now looks less likely, possibly even more delayed
now. The biggest thing is that if any precipitation did fall
during this mild period, it would fall in liquid form.
&&
.AVIATION /06Z TAFS THROUGH 06Z FRIDAY/...
Issued at 1057 PM CST Wed Jan 31 2024
Impacts to aviation are forecast within the TAF period from fog
reducing vsbys, as well as low CIGs.
Fog is forecast to develop this evening into Thursday morning,
with highest confidence in development within the southern Red
River Valley. This will impact KFAR where vsby reductions drop
to 1/4SM, possibly becoming dense (60% chance), mainly before
13Z.
Additionally, low CIGs in the MVFR to IFR range are forecast to
invade the area from the northeast tonight into Thursday. There
is a 40% chance these CIGs drop into the LIFR category. These
low CIGs are forecast to linger over the majority of the region
throughout Thursday. Lowered CIGs may extend beyond 06Z.
Winds will start light and variable, turning more northeasterly
to easterly after 12Z Thursday around 6-10 kt.
&&
.FGF WATCHES/WARNINGS/ADVISORIES...
ND...Dense Fog Advisory until 9 AM CST Thursday for NDZ039-049-052-
053.
MN...Dense Fog Advisory until 9 AM CST Thursday for MNZ002-003-022-
027-029>031-040.
&&
UPDATE...CJ
DISCUSSION...Godon
AVIATION...CJ