Snowstorm update; extremely cold temps and wind chills this week

Here’s a Sunday morning snowstorm update.

Snow will move into western Minnesota later this Sunday morning, then spread across eastern Minnesota and western Wisconsin during the afternoon and early evening hours. Snow continues tonight into early Monday.

The National Oceanic and Atmospheric Administration’s North American Mesoscale forecast model shows the potential snow pattern from Sunday morning through Monday afternoon:

NOAA NAM simulated radar from Sunday morning through Monday afternoon, via tropicaltidbits

The color chart to the right of the loop refers to the strength of the signal that returns to the radar, not to the amount of snow.

Heavy snow swath

The greatest snow accumulations (generally 6 to 9 inches) are expected from west-central Minnesota through the Twin Cities metro area into southeastern Minnesota and west-central Wisconsin.
Here’s the National Weather Service snow forecast from Sunday through Monday:

NWS Twin Cities

In the Twin Cities metro area, the accumulating snow is expected to be mainly from mid-afternoon today through the overnight hours tonight.

The National Weather Service has issued a winter storm warning for most of central and southern Minnesota and parts of Wisconsin from Sunday afternoon through the overnight hours of Sunday night into Monday morning. It’s for heavy snow and blowing snow:

NWS Twin Cities

The winter storm warning begins at noon today in west-central Minnesota.
The winter storm warning for the Twin Cities metro area runs from 3 p.m. today until noon on Monday:

URGENT – WINTER WEATHER MESSAGE
National Weather Service Twin Cities/Chanhassen MN
403 AM CST Sun Jan 27 2019

…HEAVY SNOW AND BLOWING SNOW SUNDAY AFTERNOON THROUGH EARLY
MONDAY…

…DANGEROUS WIND CHILLS TUESDAY THROUGH THURSDAY MORNING…

Accumulating snow will occur across all of central and southern
Minnesota into western Wisconsin Sunday afternoon through early
Monday morning. The greatest snow accumulations will stretch from
west central Minnesota through the Twin Cities metro to around the
Eau Claire area, with lesser amounts towards northern Minnesota,
southwestern Minnesota and northwestern Wisconsin. This system is
expected to cause significant travel impacts, especially Sunday
night through the Monday morning commute.

Winter Storm Warnings continue for all of central and southern
Minnesota and western Wisconsin, with the exception of a small
portion of southwestern Minnesota south of the Minnesota River.
In these areas, a Winter Weather Advisory remains in effect.

Snowfall amounts in the warning area can be expected to range
from 6 to 8 inches. Snowfall amounts in the advisory area can be
expected to range from 3 to 6 inches.

Dangerous wind chills of 60 below zero to 35 below zero are
expected Tuesday morning through Thursday morning in western and
central Minnesota. Wind chills of 35 below zero and lower are
expected Tuesday afternoon through Thursday morning in east
central MN and west central Minnesota.

MNZ053-059>063-068>070-271815-
/O.NEW.KMPX.WC.A.0001.190129T2100Z-190131T1500Z/
/O.EXT.KMPX.WS.W.0002.190127T2100Z-190128T1800Z/
Chisago-Wright-Hennepin-Anoka-Ramsey-Washington-Carver-Scott-
Dakota-
Including the cities of Center City, Monticello, Minneapolis,
Blaine, St Paul, Stillwater, Chaska, Shakopee, and Hastings
403 AM CST Sun Jan 27 2019

…WINTER STORM WARNING NOW IN EFFECT FROM 3 PM THIS AFTERNOON TO
NOON CST MONDAY…
…WIND CHILL WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
THURSDAY MORNING…

* WHAT…Heavy snow expected. Dangerously cold wind chills
possible. Total snow accumulations of 6 to 8 inches expected.
Wind chills as low as 55 below zero to 35 below zero likely.

* WHERE…Portions of central and east central Minnesota.

* WHEN…For the Winter Storm Warning, from 3 PM this afternoon
to noon CST Monday. For the Wind Chill Watch, from Tuesday
afternoon through Thursday morning.

* ADDITIONAL DETAILS…Plan on slippery road conditions. Patchy
blowing snow could significantly reduce visibility. The
hazardous conditions could impact the morning or evening
commute. The dangerously cold wind chills could cause
frostbite on exposed skin in as little as 5 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

A Wind Chill Watch means there is the potential for a combination
of very cold air and the wind to create dangerously low wind
chill values. Monitor the latest forecasts and warnings for
updates on this situation.

The latest road conditions for Minnesota can be found at
511mn.org and for Wisconsin at 511wi.gov, or by calling 5 1 1 in
either state.

The wind chill watch begins on Tuesday.

You can check the latest forecasts, warnings and advisories from the NWS offices in the Twin Cities, Grand Forks, N.D., Sioux Falls, S.D., and La Crosse, Wis .

Temperatures plummet this week

Sunday highs range from the single digits below zero in parts of northern Minnesota to the teens and low 20s southwest:

The Twin Cities metro area should top out around 10 degrees on Monday, then the extremely cold air moves in. The metro area will see high temps in the single digits below zero on Tuesday. Our high on Wednesday is expected to be around -12, after a Wednesday morning low of about -24. The low Thursday morning could also be about -24, followed by an afternoon high around -4. Metro temps finally rise into the positive numbers on Friday, and we could reach upper 20s next Saturday. That’ll feel nice after several days of arctic cold!

Wind chills will be in the -40 to -50 range in many areas from Tuesday morning into early Thursday:

NWS Twin Cities

This blog will be updated around mid-morning.

Programming note

You can hear my live weather updates on Minnesota Public Radio at 7:49 a.m. Thursdays and Fridays, and at 7:35 a.m., 9:35 a.m. and 4:35 p.m. each Saturday and Sunday.