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Stormy Weather in the Northwest; Fire Weather Threat Redeveloping in Southern California this Weekend

An active fall storm pattern in the Pacific Northwest is bringing heavy rain and high elevation snow to the region which will persist through this weekend. Strong winds associated with this system will bring a renewed period of critical fire weather to southern California later this weekend into next week. Read More >

The first winter storm of the season dumped as much as 12 to 18 inches of snow across the region. Snow developed shortly before daybreak on the 20th of November, and quickly spread northward. A narrow band of heavy snow developed along and south of the Interstate 90 corridor, producing as much as 2 to 3" of snow per hour. (What causes bands of heavy snow?)  This heavy snow caused travel conditions to deteriorate quickly during the day, with traffic becoming dangerous for much of the Tri-State area.  

 


This storm system would slowly rotate southeast into Iowa in the afternoon and evening hours, producing heavy snow across much of the state.   When all was said and done, snow amounts as high as 18 inches were reported in the immediate vicinity of Sioux Falls. The 7.2" of snow at the Sioux Falls Regional Airport broke the daily record of 3.8" which was set back in 1975. In Sioux City, 5.7" of snow broke the daily record of 2.5" set back in 1975. 
 

The daily snowfall of 7.2" in Sioux Falls was the 9th highest 1-day snow total for the month of November on record! A similar story can be said in Sioux City. The 5.7" of snow reported on the 20th was also the 9th highest 1-day snow total for the month of November

 

Sioux Falls Top 1-Day Snowfall in November
Rank Snow Total Date Event Occurred
1 12.6 1998-11-10
2 12.1 2001-11-26
3 9.6 1994-11-27
4 8.5 1979-11-21
5 8.0 1985-11-08
- 8.0 1983-11-27
7 7.6 1954-11-30
8 7.5 1959-11-12
9 7.2 2015-11-20
9 6.6 2005-11-30
10 6.5 2014-11-15
Sioux City Top 1-Day Snowfall in November
Rank Snow Total Date Event Occurred
1 12.2 1983-11-27
2 11.0 1946-11-09
3 8.3 1994-11-27
4 8.0 1948-11-19
5 7.5 1896-11-10
6 6.8 1903-11-24
7 6.6 1889-11-11
8 6.1 1959-11-12
9 5.7 2015-11-20
10 5.5 1993-11-24
- 5.5 1943-11-07
- 5.5 1928-11-01


 

Below is a list of snowfall reports received by the National Weather Service Office in Sioux Falls.  If you would like to share your snowfall amount, please use this link:

https://www.srh.noaa.gov/StormReport/SubmitReport.php?site=fsd

 

Area Snowfall Reports - Click for Larger Image Sioux Falls Snow Reports - Click for Larger Image

 

Here's a look at the visible satellite imagery taken on November 21, 2015 after the storm had passed. 

 

For an interactive version of the above map, please follow this link:

Interactive Snowfall Map

 

Select Snowfall Reports from November 20, 2015

FLANDREAU                    0.3 IN    0447 PM 11/20                        
HOWARD                       1.0 IN    0445 PM 11/20                        
WOONSOCKET                   1.0 IN    0455 PM 11/20                        
WESSINGTON SPRINGS           1.0 IN    0440 PM 11/20                        
MADISON                      1.2 IN    0442 PM 11/20                        
WINDOM                       2.0 IN    0935 PM 11/20                        
DELL RAPIDS                  2.0 IN    0526 PM 11/20                        
EDGERTON                     2.0 IN    0900 PM 11/20                        
2 NNE LAKEFIELD              3.2 IN    1017 PM 11/20                        
CHAMBERLAIN                  4.0 IN    0435 PM 11/20                        
LUVERNE                      4.4 IN    0446 PM 11/20                        
5 NE SALEM                   4.5 IN    0700 PM 11/20                        
ALEXANDRIA                   4.5 IN    0438 PM 11/20                        
6 ESE BALTIC                 5.0 IN    0415 PM 11/20                        
SALEM                        5.0 IN    0444 PM 11/20                        
6 ESE BALTIC                 5.0 IN    0434 PM 11/20                        
1 WSW SIOUX CITY             5.3 IN    0830 PM 11/20                        
SIOUX CITY                   5.7 IN    0915 PM 11/20                        
2 NNE SIOUX CITY             6.0 IN    0845 PM 11/20                        
HOLSTEIN                     6.0 IN    0540 PM 11/20                        
SOUTH SIOUX CITY             6.5 IN    0503 PM 11/20                        
NORTH SIOUX CITY             6.8 IN    0800 PM 11/20                        
3 S CORSICA                  7.0 IN    0505 PM 11/20                        
2 N SIOUX CITY               7.0 IN    0800 PM 11/20                        
4 E SIOUX RAPIDS             7.0 IN    0357 PM 11/20                        
3 N SIOUX FALLS              7.2 IN    0600 PM 11/20                        
MENNO                        8.0 IN    0600 PM 11/20                        
PONCA                        8.0 IN    1055 PM 11/20                        
YANKTON                      8.0 IN    0451 PM 11/20                        
JACKSON                      8.0 IN    0951 PM 11/20                        
1 S ARMOUR                   8.0 IN    0505 PM 11/20                        
WORTHINGTON                  8.0 IN    0937 PM 11/20                        
SUPERIOR                     8.0 IN    0915 PM 11/20                        
TERRIL                       8.0 IN    0358 PM 11/20                        
TYNDALL                      8.7 IN    0830 PM 11/20                        
VERMILLION                   9.0 IN    0645 PM 11/20                        
2 S BRANDON                  9.0 IN    0840 PM 11/20                        
ORANGE CITY                  9.0 IN    0522 PM 11/20                        
CHEROKEE                     10.0 IN   1022 PM 11/20                        
SUTHERLAND                   10.0 IN   0440 PM 11/20                        
5 W SIOUX FALLS              10.8 IN   0921 PM 11/20                        
TRIPP                        11.0 IN   0423 PM 11/20                        
SIOUX CENTER                 11.0 IN   0403 PM 11/20                        
LE MARS                      11.0 IN   0855 PM 11/20                        
2 ESE YANKTON                12.0 IN   0455 PM 11/20                        
3 N SIOUX CENTER             12.0 IN   0924 PM 11/20                        
WAKONDA                      12.0 IN   0840 PM 11/20                        
CENTERVILLE                  12.5 IN   0510 PM 11/20                        
SANBORN                      13.2 IN   0422 PM 11/20                        
4 SSE SIOUX FALLS            13.5 IN   0400 PM 11/20                        
HULL                         14.0 IN   1034 PM 11/20                        
HAWARDEN                     14.5 IN   0523 PM 11/20                        
SHELDON                      15.0 IN   0845 PM 11/20                        
INWOOD                       15.0 IN   0830 PM 11/20                        
3 WNW HARRISBURG             15.0 IN   0400 PM 11/20                        
ALCESTER                     16.0 IN   0852 PM 11/20                        
ROCK RAPIDS                  16.0 IN   0840 PM 11/20                        
DOON                         16.0 IN   0900 PM 11/20                        
4 S SIOUX FALLS              16.0 IN   0430 PM 11/20                        
MARION                       16.0 IN   0408 PM 11/20                        
GEORGE                       17.0 IN   0530 PM 11/20                        
1 SE HARRISBURG              17.0 IN   0433 PM 11/20                        
1 SE TEA                     18.0 IN   0615 PM 11/20