SNOWFALL RECORDS FOR SIOUX FALLS, SD
    COMPILED BY THE NATIONAL WEATHER SERVICE IN SIOUX FALLS


SIOUX FALLS SNOWFALL RECORDS...1893- 1/12/2010

GREATEST SEASONAL SNOWFALL  94.7 INCHES  1968-69

GREATEST 24 HOUR STORM      26.0 INCHES  FEB. 17-18, 1962

GREATEST STORM TOTAL        32.2 INCHES  FEB. 16-18, 1962

GREATEST MONTHLY TOTAL      48.4 INCHES  FEB. 1962

EARLIEST SNOWFALLS (24 HR PERIOD)...

TRACE...                                 SEP. 18, 1929
MEASURABLE...                0.3 INCH    SEP. 25, 1939
SIGNIFICANT...               2.7 INCHES  OCT. 1, 1999  
HEAVY...                    11.2 INCHES  OCT. 31-NOV. 1, 1991

LATEST SNOWFALLS...

TRACE...                                 MAY 31, 1954
MEASURABLE...                0.1 INCH    MAY 18, 1968
SIGNIFICANT...               2.0 INCHES  MAY 13, 1943
HEAVY...                    10.5 INCHES  APR. 28, 1994

MAXIMUM SNOW DEPTH          34.0 INCHES  DEC. 31, 1968; FEB. 28, 1969

NUMBER OF PAST HEAVY SNOW EVENTS (IN 24 HOURS)...
BY MONTH...1893- 1/12/2010

          6 INCHES OR MORE     10 INCHES OR MORE     14 INCHES OR MORE

OCTOBER          2                     1                     0
NOVEMBER        17                     4                     0
DECEMBER        26                     6                     1
JANUARY         17                     3                     0
FEBRUARY        29                     7                     3
MARCH           35                    10                     3
APRIL            9                     2                     0

TOTAL          135                    33                     7

SNOWIEST BY MONTH...
SEPTEMBER    0.9 INCH IN 1985
OCTOBER     10.0 INCHES IN 1991
NOVEMBER    21.9 INCHES IN 1985
DECEMBER    41.1 INCHES IN 1968
JANUARY     22.2 INCHES IN 1929
FEBRUARY    48.4 INCHES IN 1962
MARCH       31.5 INCHES IN 1951
APRIL       18.4 INCHES IN 1983
MAY          3.0 INCHES IN 1944


NOTE THAT THESE ARE THE "OFFICIAL" SNOWFALL AMOUNTS REPORTED
AT THE OBSERVING LOCATION AND ARE NOT NECESSARILY THE SAME AS
ELSEWHERE IN THE SIOUX FALLS AREA. IN ADDITION WIDE-OPEN AIRPORT
AREAS CAN BE POOR LOCATIONS TO MEASURE SNOW DUE TO THE WIND EFFECTS 
THAT CAN BLOW THE SNOW AROUND AND ALSO COMPRESS IT. THIS CAN CAUSE
AN UNDERESTIMATION IN THE SNOWFALL MEASUREMENT.

RICHARD S. RYRHOLM 1/12/2010


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