50+cm possible for Northern Plains

A major winter storm is set to impact the Northern Plains tomorrow morning bringing with it significant snowfall and blizzard conditions. Below are the current watches/warnings issued by the National Weather Service. Red are blizzard warnings and pink are winter storm warnings. Expect near-impossible to impossible driving conditions starting Thursday afternoon into Thursday night anywhere along the I-29 corridor in North Dakota and South Dakota.


National Weather Service warnings as of 4pm CST

Some areas could receive significant snowfall:


  • Southeast North Dakota & northeast South Dakota: 18inches + (~50cm possible)

  • Grand Forks and surroundings: ~10 inches (20-30cm possible)

  • Manitoba border: ~5 inches (10-15cm possible)

Blizzard conditions will begin Thursday afternoon into Thursday night. Significant drifting of snow will be possible with travel being near impossible in some areas.

Forecasted precipitation by NAM-3km model from Wednesday night to Friday evening

...WINTER STORM WARNING NOW IN EFFECT UNTIL 6 AM CST THURSDAY...
...BLIZZARD WARNING IN EFFECT FROM 6 AM THURSDAY TO 6 AM CST
FRIDAY...

* WHAT...Heavy mixed precipitation. Blizzard conditions expected.
  Additional snow accumulations of 2 to 4 inches along with some
  light freezing drizzle is expected. Total snow accumulations of
  4 to 9 inches. Winds gusting as high as 40 mph.

* WHERE...Portions of central and north central South Dakota.

* WHEN...For the Winter Storm Warning, until 6 AM CST Thursday.
  For the Blizzard Warning, from 6 AM Thursday to 6 AM CST
  Friday.

* ADDITIONAL DETAILS...Travel could be very difficult to
  impossible. Areas of blowing snow could significantly reduce
  visibility. In addition, a light glaze of ice could make roads
  very slippery.  The hazardous conditions could impact the
  morning or evening commute.

Here is a look at the latest snowfall forecasts. There are 3 maps: 1) shows the storm total for the event (48 hour period) 2) shows the snowfall only until 6 am Thursday and 3) shows the snowfall 6 am Thursday to 6 am Friday only. - NWS Grand Forks

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM CST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to
  11 inches expected. Winds gusting as high as 50 mph.

* WHERE...Northern and central Red River Valley.

* WHEN...From noon today to 9 AM CST Friday. The majority of
  accumulating snow will occur this evening into Thursday
  morning. Winds will increase on Thursday with the potential
  for blizzard conditions Thursday afternoon and overnight.

* ADDITIONAL DETAILS...Travel will be very difficult to
  impossible. Widespread blowing snow should significantly
  reduce visibility Thursday afternoon and overnight. The
  hazardous conditions will impact the morning and especially
  evening commutes. Cold wind chills Thursday night as low as 30
  below zero could cause frostbite on exposed skin in as little
  as 30 minutes.