Review & Historical Significance:

Add a written summary or simply an LSR map in this section. If writing an extensive report, you can break the report down into wind and hail below (otherwise delete).

Review

There were several significant weather events across our forecast area during the winter of 1996-97: 

November 16th: Winter storm with heavy snow of 6 to 9 inches, November 16th-17th: Winter storm with widespread freezing rain, 4 to 10 inches of snow, near blizzard conditions, November 19th-20th: Winter storm with widespread freezing rain, 3 to 12 inches of snow, near blizzard conditions, November 22nd-23rd: Winter storm with heavy snow of 6 to 8 inches, November 29th-30th: Winter storm with widespread freezing rain and 2 to 4 inches of snow, December 14th: Winter storm with heavy snow of 6 to 20 inches and near blizzard conditions, December 16th-19th: Blizzard with gusts to 55 mph and extreme wind chills, December 23rd: Blizzard with 2 to 5 inches of snow, January 3rd-5th: Blizzard with gusts to 60 mph, widespread freezing rain, 6 to 26 inches of snow, and extreme wind chills, January 9th-10th: Blizzard with gusts to 60 mph, 2 to 7 inches of snow, extreme wind chills, January 22nd: Blizzard with extreme wind chills, February 3rd-4th: Winter storm with 4 to 7 inches of snow and blowing snow and low visibilities, Late February: Flooding began on the Bad River in central South Dakota, March 3rd-4th: Winter storm with 4 to 7 inches of snow and blowing snow with low visibilities, March 12th-14th: Winter storm with freezing rain and 3 to 8 inches of snow, Late March-April: Record flooding for all rivers and record high lake levels across the area, April 4th-6th: Ice storm/Blizzard, 1 to 3 inches of ice from freezing rain, 4 to 12 inches of snow with winds gusting to 70 mph, May: Flooding on several rivers continued throughout May.

By springtime, Kennebec finished the 1996-97 winter season with 69.8" of snow, Pierre 73.7", Mobridge and Aberdeen 75.9", Sisseton 79.1", Timber Lake 80.0", and Wheaton 82.3" (no COOP Observer in Watertown this season). Below is how the winter season compares to normal in terms of overall temperature and snowfall, from the Midwestern Regional Climate Center.

December 1, 1996 - February 28, 1997 Temperature Departure from Normal	November 1, 1996 - March 31, 1997 Temperature Departure from Normal	December 1, 1996 - February 28, 1997 Accumulated Snowfall	December 1, 1996 - February 28, 1997 Snowfall Departure from Normal

October 1, 1996 - June 1, 1997 Accumulated Snowfall	October 1, 1996 - June 1, 1997 Snowfall Departure from Normal

Historical Significance 

Some of the effects from the devastating winter of 1996-97 include widespread power outages from thousands of power lines and poles downed, numerous county and township roads, highways, and interstates closed, thousands of stranded travelers, hundreds of accidents, ditched vehicles, and rescues, tens of days of school closings across the area, tens of thousands of livestock died, hundreds of outbuilding collapses from the weight of snow and ice, hundreds of businesses and airports closed throughout the winter along with events canceled or postponed, snow drifts high enough to nearly bury homes, and compact enough to drive on top of, and hundreds of homes, outbuildings, and roads flooded. 

Below are graphs at various locations across the area (Watertown did not have a COOP Observer during the winter of 1996-97) of the Accumulated Winter Season Severity Index (AWSSI), which aims to answer the question "How severe was this winter" via objective quantification using max/min temperature, snowfall, and snow depth or precipitation (does NOT include less commonly available data such as wind, wind chill, blowing snow, mixed precipitation, or freezing rain). In a nutshell, the graphs depict a distribution of how mild (red background shade) to extreme (purple background shade) winters have been relative to each location's climatology, using data from 1950-2023. Plotted via lines is the winter of 1996-97, in cyan, and the worst 4 winters that have followed. Notice, some winters begin mild and become extreme through time, whereas others begin extreme and end that way, as was the case in 1996-97 for most. 

Perspective via the AWSSI for Aberdeen, SD	Perspective via the AWSSI for Huron, SD	Perspective via the AWSSI for Pierre, SD	Perspective via the AWSSI for Mobridge, SD

Perspective via the AWSSI for Canby, MN	Perspective via the AWSSI for Morris, MN

Below is information related to snow depth at various locations across the area, in part from the Iowa Environmental Mesonet. 

A list of locations who's snow depth record remains unsurpassed as of summer 2023	Snow depth records at Aberdeen, SD from 2023 to 1940 (bottom to top) and from November 1st to May 1st (left to right)	Snow depth records at Mobridge, SD from 2023 to 1940 (bottom to top) and from November 1st to May 1st (left to right)	Snow depth records at Morris, MN from 2023 to 1940 (bottom to top) and from November 1st to May 1st (left to right)

Winter Weather Photos

While photos can't do justice, here are several collected by the National Weather Service office in Aberdeen, SD during the winter of 1996-1997 and spring of 1997. 

Large drift at the NWS Aberdeen, SD weather forecast office	Large drift at the NWS Aberdeen, SD weather forecast office	Large drift at the NWS Aberdeen, SD weather forecast office	Large drift at the NWS Aberdeen, SD weather forecast office

Sun dogs captured at the NWS Aberdeen, SD weather forecast office

	Snow drifts up to 10 feet high

Spring Flooding Photos