National Weather Service United States Department of Commerce

Winter Storm Shifting From the Central U.S. to the Northeast; Severe Thunderstorms in the South

A winter storm will track to the Lower Mississippi River Valley by Monday and across the central Appalachians Monday night to southern New England by Tuesday. A swath of snow, sleet and freezing rain will spread from the Central Plains east into southern New England by Monday and Tuesday. Severe thunderstorms with damaging winds and tornadoes are possible over the northern Gulf Coast on Monday. Read More >

November 2019 was a tale of two halves in terms of temperatures. The area started out much below average (Sisseton set a record low max temp of 13 F on the 11th and a record low temp of 0 F on the 12th), but then flipped to much above average. The end result was near average temperatures on a whole for the month.

November was predominantly quite dry, and the whole area would have finished below average for the month in terms of precipitation and snow if not for a major storm at the end of the month. As it turns out, much of central South Dakota finished above average in both regards, far northeastern South Dakota and west central Minnesota finished below average, and those in-between finished near normal. The major storm in reference here is the Nov 29-Dec 1 Post-Thanksgiving winter storm, when significant impacts resulted from heavy snow and strong winds (for more: https://www.weather.gov/abr/Nov29-Dec1Post-ThanksgivingWinterStorm). Several daily records were broken. For precipitation: In Aberdeen, 0.21" of liquid equivalent fell on the 29th (0.21 in 2016) and 1.09" of liquid equivalent fell on teh 30th (0.55" in 2000); in Sisseton, 0.44" fell on the 30th (0.32" in 2015); in Mobridge, 0.13" fell on the 29th (0.11" in 2011) and 0.77" fell on the 30th (0.25" in 2015). For snow: In Aberdeen, 14.3" of snow fell on the 30th (10.5" in 2000); in Sisseton, 7.8" of snow fell on the 30th (4.5" in 2015); in Mobridge, 6.2" of snow fell on the 30th (3" in 1985). Thanks in large part to this storm, Aberdeen ranked 8th for snowiest November on record with 17.7”, Kennebec 8th with 14.5”, Timber Lake 7th with 12.6”, Pierre 6th with 11.6” and Mobridge 6th with 12.2”. Amazingly, after being impacted by both the October 10-12th and Nov 29-Dec1st winter storms, Eureka has already reported 29.6” of snow for the season as of *Dec 3rd*. Their average for the whole season is 43.2”.   

This winter storm and other precipitation events this month further contribute to an incredibly wet year, and add to concerns about potential spring 2020 flooding. Updated rankings for total year-to-date precipitation through November 30th:

Aberdeen: 29.48” ranks 11th, Wheaton: 30.08” ranks 11th, Watertown: 32.34” ranks 2nd (38.67” in 1977), Timber Lake: 29.61” ranks 2nd (33.45” in 1915), Pierre: 29.94” ranks 2nd (31.80” in 1997), Mobridge: 28.83” ranks 1st (26.76” in 1915), Sisseton: 33.89” ranks 1st (32.21” in 2005), Kennebec: 34.99” ranks 1st (29.65” in 1915)

Updated rankings of total yearly precipitation through November 30th (every additional hundredth of precipitation from now through the remaining 31 days of the calendar year will only add to these rankings/records):

Wheaton: 30.08” ranks 12th, Aberdeen: 29.48” ranks 11th, Timber Lake: 29.61” ranks 2nd (34.10” in 1915), Pierre: 29.94” ranks 2nd (31.85” in 1997), Watertown: 32.34” ranks 2nd (40.04” in 1977), Mobridge: 28.83” ranks 1st (26.86” in 1915), Sisseton: 33.89” ranks 1st (32.30 in 1993), Kennebec: 34.99” ranks 1st (30.25” in 1915)

 

                                        November 2019

       

Temperature Data

Aberdeen

Sisseton

Wheaton

Watertown

Warmest Temperature / Date

60°/ 24th  

54°/ 24th  

54°/17th, 25th       

50°/ 24th     

Coldest Temperature / Date

-3°/ 11th       

0°/ 11th, 12th     

0°/ 12th    

-1°/ 12th         

Average High / Departure from Normal

39.7°/ +0.1°

37.1°/ -3.1°

36.6°/ -2.0°

36.4°/ -2.6°

Average Low / Departure from Normal

20.1°/ +1.2°

21.3°/ -0.2°

20.9°/ +0.5°

20.7°/ +0.1°

Monthly Average / Departure from Normal

29.9°/ +0.6°

29.2°/ -1.6°

28.8°/ -0.7°

28.5°/ -1.3°

Precipitation Data

       

Monthly Precipitation / Departure from Normal

1.66”/ +0.93”

0.52”/ -0.06”

0.24”/ -0.89”

0.59”/ -0.17”

Most Precipitation in 24 hours / Date

1.09”/ 30th      

0.44”/ 30th    

0.18”/ 30th   

0.21”/ 30th        

Monthly Snowfall / Departure from Normal

17.7”/ +10.7”

8.4” / +1.1

1.8” / -2.8”

3.1” / -1.8”

Most Snow in 24 hours / Date

14.3” / 30th  

7.8” / 30th

1.8” / 30th

1.8” / 30th     

         

Temperature Data

Pierre

Kennebec

Mobridge

Timber Lake

Warmest Temperature / Date

66°/ 9th      

66°/ 9th

63°/ 24th      

57°/ 9th, 24th     

Coldest Temperature / Date

     -3°/ 11th          

-1°/ 12th        

-5°/ 11th       

-2°/ 11th        

Average High / Departure from Normal

43.1°/ -1.0°

44.8°/ -0.7°

41.7°/ -1.1°

39.6°/ -2.3°

Average Low / Departure from Normal

21.9°/ -1.4°

22.4°/ -0.2°

20.8°/ -0.3°

21.1°/ -0.1°

Monthly Average / Departure from Normal

32.5°/ -1.2°

33.6°/ -0.4°

31.2°/ -0.7°

30.4°/ -1.1°

Precipitation Data

       

Monthly Precipitation / Departure from Normal

1.07”/ +0.31”

1.58”/ +0.86”

1.34”/ +0.86”

1.17”/ +0.93”

Most Precipitation in 24 hours / Date

0.31”/ 30th           

1.28”/ 30th        

0.77”/ 30th  

0.63”/ 30th  

Monthly Snowfall / Departure from Normal

11.6” / +6.3”

14.5” / +8.2

12.2” / +7.5

12.6” / +1.4

Most Snow in 24 hours / Date

3.3” / 30th     

12.5” / 30th  

6.2” / 30th   

6.9” / 30th   

 

Monthly temperature departures on a whole, from the Midwestern Regional Climate Center

 

Monthly precipitation totals (left) and departures (right), from the Midwestern Regional Climate Center

Monthly snowfall totals (left) and departures (right), from the Midwestern Regional Climate Center

 

The Accumulated Winter Season Severity Index from the Midwestern Regional Climate Center ranks this season as "Severe" to "Extreme" across the region. This index takes into account max/min temperatures, snowfall, and snow depth or precipitation. 

 

A more in-depth look at three specific sites, Aberdeen, Watertown and Pierre, can be found below: