Climatological Report (Seasonal)
Issued by NWS

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CXUS53 KIWX 020002
CLSSBN

CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
644 PM EST FRI DEC 1 2017

...................................

...THE SOUTH BEND CLIMATE SUMMARY FOR THE FALL SEASON, FROM
9/1/2017 TO 11/30/2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1893 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              99   09/01/1953
                        09/08/1933
                        09/07/1933
 LOW               -7   11/25/1950
HIGHEST            91   09/23        MM      MM       91
LOWEST             21   11/26        MM      MM       24
                        11/10
AVG. MAXIMUM     62.8              61.3     1.5     65.8
AVG. MINIMUM     44.2              43.2     1.0     47.2
MEAN             53.5              52.3     1.2
DAYS MAX >= 90      4               0.7     3.3        2
DAYS MAX <= 32      1               1.9    -0.9        0
DAYS MIN <= 32     22              16.6     5.4        9
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        19.07   2008
 MINIMUM         3.23   1956
TOTALS          14.57             10.12    4.45    10.20
DAILY AVG.       0.16              0.11    0.05     0.11
DAYS >= .01        33              34.2    -1.2       30
DAYS >= .10        21              19.6     1.4       19
DAYS >= .50         8               6.3     1.7        9
DAYS >= 1.00        4               2.0     2.0        2
GREATEST
 24 HR. TOTAL    3.81

SNOWFALL (INCHES)
RECORDS
 TOTAL           30.6   1977
 24 HR TOTAL       MM
TOTALS              T               5.2    -5.2      0.5
SINCE 7/1           T               5.2    -5.2      0.5
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       4               4.2    -0.2        3
DAYS >= 1.0         0               1.8    -1.8        0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL      0.0   MM

DEGREE_DAYS
HEATING TOTAL    1162              1252     -90      893
 SINCE 7/1       1183              1269     -86      901
COOLING TOTAL     140                91      49      141
 SINCE 1/1        692               773     -81      950
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.2
HIGHEST WIND SPEED/DIRECTION    31/190    DATE  10/07
HIGHEST GUST SPEED/DIRECTION    42/190    DATE  10/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           40
NUMBER OF DAYS PC             29
NUMBER OF DAYS CLOUDY         22

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN               14     RAIN                      20
LIGHT RAIN               38     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                4     SLEET                      0
FOG                      41     FOG W/VIS <= 1/4 MILE      5
HAZE                      3

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

FALL 2017

FALL 2017 WAS RELATIVELY WARM AND VERY WET IN THE SOUTH BEND AREA.
SEPTEMBER BEGAN WARM AND DRY BUT WAS FOLLOWED BY A WARM OCTOBER WITH
NEAR RECORD PRECIPITATION. NOVEMBER THEN TRANSITIONED COOLER BUT
PRECIPITATION REMAINED NEAR NORMAL. THERE WAS ONLY A TRACE OF
SNOWFALL DURING THE ENTIRE FALL SEASON. THIS HAS ONLY OCCURRED IN
SEVEN FALL SEASONS SINCE 1950 AND ALL OF THOSE SEASONS WERE BETWEEN
1990 AND 2017.

THE AVERAGE TEMPERATURE FOR THE FALL SEASON WAS 53.5, 0.8 DEGREES
ABOVE NORMAL. THIS RANKED AS THE 41ST WARMEST FALL AT SOUTH BEND.
THERE WERE 4 DAYS WITH A HIGH TEMPERATURE OF 90 OR HIGHER, MORE THAN
DURING THE MONTHS OF MAY THROUGH AUGUST COMBINED. THE WARMEST
TEMPERATURE THIS FALL WAS 91 DEGREES ON SEPTEMBER 23TH. THE COLDEST
TEMPERATURE WAS 21 DEGREES ON NOVEMBER 26TH.

FALL PRECIPITATION WAS 14.57 INCHES, 4.14 INCHES ABOVE NORMAL. THIS
RANKED AS THE 8TH WETTEST FALL ON RECORD.

BELOW IS A MONTH BY MONTH REVIEW OF THE FALL IN THE SOUTH BEND AREA.

SEPTEMBER

...WARM AND DRY SEPTEMBER DESPITE COOL START...

SEPTEMBER WAS A WARM AND DRY MONTH WHICH EXPERIENCED MORE 90 DEGREE
DAYS (4) THAN THE COMBINED MONTHS OF MAY, JUNE, JULY AND AUGUST (3).
NEARLY THREE QUARTERS OF THE MONTHLY PRECIPITATION FELL ON JUST TWO
DAYS AND THERE WERE ONLY 9 DAYS WITH MEASURABLE PRECIPITATION. THE
FIRST HALF OF THE MONTH ACTUALLY BEGAN RATHER COOL AND WET BUT
QUICKLY TRANSITIONED TO VERY WARM AND DRY DURING THE SECOND HALF.

TWELVE OF THE FIRST FOURTEEN DAYS OF SEPTEMBER SAW BELOW NORMAL
TEMPERATURES. FOUR OF THESE TWELVE DAYS WERE 10 DEGREES OR MORE
BELOW NORMAL. MEASURABLE PRECIPITATION ALSO FELL ON 6 OF THE FIRST 8
DAYS IN SEPTEMBER. THE OVERALL WEATHER PATTERN ACROSS THE UNITED
STATES CHANGED DRASTICALLY MID MONTH AND THIS BROUGHT HEAT, HUMIDITY
AND VERY DRY CONDITIONS TO THE LOCAL AREA DURING THE LATTER HALF OF
THE MONTH. THERE WAS ONLY ONE DAY AFTER THE 13TH WITH AN AVERAGE
TEMPERATURE BELOW NORMAL AND THAT WAS ON THE 30TH.

THE PERIOD FROM SEPTEMBER 20TH TO THE 26TH WAS EXCEPTIONALLY WARM
WITH EACH DAY DURING THIS PERIOD AT LEAST 11 DEGREES ABOVE NORMAL
AND FOUR DAYS FROM THE 21ST TO THE 24TH HAD HIGH TEMPERATURES OF 90
DEGREES OR WARMER. INCREASED CLOUDS AND HUMIDITY KEPT HIGH
TEMPERATURES ON THE 25TH AND 26TH AT 89 DEGREES.

SO JUST HOW WARM WAS THIS PERIOD FROM THE 20TH TO THE 26TH COMPARED
TO PREVIOUS YEARS? THE AVERAGE TEMPERATURE DURING THIS STRETCH WAS
76.4 DEGREES WITH 4 DAYS HAVING A HIGH TEMPERATURE OF 90 OR HIGHER.
ONLY THE YEAR 1908 HAD A WARMER AVERAGE TEMPERATURE, 77.1, DURING
THIS SAME PERIOD WHILE ALSO RECORDING 5 DAYS WITH HIGH TEMPERATURES
OF 90 OR WARMER DURING THIS STRETCH. SEPTEMBER 1908 IS ALSO THE
WARMEST SEPTEMBER ON RECORD AND HAD A TOTAL OF 13 DAYS WITH A HIGH
TEMPERATURE OF 90 OR WARMER AND 5 DAYS WITH A HIGH OF 95 DEGREES.

THE AVERAGE MONTHLY TEMPERATURE FOR SEPTEMBER 2017 WAS 65.7, 1.8
DEGREES ABOVE NORMAL. THIS RANKED AS THE 37TH WARMEST SEPTEMBER ON
RECORD. THE HIGHEST TEMPERATURE WAS 91 ON THE 23RD AND THE COOLEST
TEMPERATURE WAS 40 ON THE 30TH.

THERE WAS JUST 2.04 INCHES OF PRECIPITATION RECORDED, 1.49 INCHES
BELOW NORMAL. THIS RANKED AS THE 35TH DRIEST SEPTEMBER ON RECORD.


OCTOBER

...NEAR RECORD PRECIPITATION AND WARM TEMPERATURES FOR OCTOBER...

THE FIRST THREE WEEKS OF OCTOBER WERE VERY WARM AND WET WHILE THE
LAST 8 DAYS WERE VERY COOL AND GENERALLY DRY. SOUTH BEND RECEIVED
OVER 9 INCHES OF RAINFALL WHICH WAS JUST ABOUT A HALF INCH SHY OF
THE RECORD FOR WETTEST OCTOBER.

THROUGH THE FIRST 23 DAYS OF THE MONTH, TEMPERATURES WERE AT OR
ABOVE NORMAL ON ALL BUT ONE DAY. EACH DAY FROM THE 24TH THROUGH THE
31ST WAS BELOW NORMAL WITH THREE DAYS AT LEAST 10 DEGREES BELOW
NORMAL. THE FIRST WIDESPREAD FROST AND FREEZE OCCURRED DURING THIS
LAST WEEK OF OCTOBER, WHICH WAS LATER THAN NORMAL.

THE AVERAGE MONTHLY TEMPERATURE WAS 55.9 DEGREES, 3.8 DEGREES ABOVE
NORMAL. THIS RANKED AS THE 22ND WARMEST OCTOBER ON RECORD. THE
WARMEST TEMPERATURE WAS 83 ON THE 7TH AND THE COLDEST WAS 29 ON THE
26TH. THERE WERE 4 MORNINGS WITH A LOW TEMPERATURE AT OR BELOW 32
DEGREES.

MONTHLY PRECIPITATION TOTALED 9.13 INCHES, 5.81 INCHES ABOVE NORMAL.
THIS RANKED AS THE 3RD WETTEST OCTOBER ON RECORD. THE WETTEST
OCTOBER IS 1954 WITH 9.75 INCHES OF PRECIPITATION. SEVERAL DAILY
RAINFALL RECORDS WERE BROKE THIS MONTH. THE FIRST OCCURRED ON
OCTOBER 11TH WHEN 1.62 INCHES OF RAIN FELL, BREAKING THE OLD RECORD
OF 1.43 INCHES SET IN 1931. THE SECOND RECORD WAS BROKEN ON OCTOBER
14TH WHEN 3.81 INCHES OF RAIN FELL. THE PREVIOUS RECORD FOR THIS
DATE WAS 2.12 INCHES SET IN 1970. THIS RECORD RAINFALL ON THE 14TH
WAS ALSO AN ALL-TIME SINGLE DAY RECORD FOR THE MONTH OF OCTOBER. THE
PREVIOUS ONE DAY RECORD OCTOBER RAINFALL WAS 3.47 INCHES SET ON
OCTOBER 17TH 1988.

THERE WAS A TRACE OF SNOWFALL RECORDED ON THE 28TH. NORMAL OCTOBER
SNOWFALL IS 0.4 INCHES.

NOVEMBER

WHILE THE LAST WEEK OF NOVEMBER EXPERIENCED NEAR NORMAL TO ABOVE
NORMAL TEMPERATURES AND BELOW NORMAL PRECIPITATION...THE BEGINNING
TO MIDDLE PORTION OF THE MONTH WAS COLD AND GENERALLY WET. THE
COOLER TEMPERATURES WERE A REVERSAL FROM A VERY WARM BUT WET
OCTOBER. DESPITE BEING COOL AND WET, ONLY A TRACE OF SNOWFALL WAS
RECORDED DURING THE ENTIRE MONTH.

THE AVERAGE MONTHLY TEMPERATURE WAS 38.9 DEGREES, 1.8 DEGREES BELOW
NORMAL. THIS RANKED AS THE 39TH COOLEST NOVEMBER ON RECORD AT SOUTH
BEND. THE WARMEST TEMPERATURE WAS 61 ON THE 5TH AND 28TH. THE
COLDEST TEMPERATURE OF 21 OCCURRED ON THE 10TH AND 26TH.

TOTAL PRECIPITATION FOR THE MONTH WAS 3.40 INCHES WHICH WAS 0.13
INCHES ABOVE NORMAL. THIS RANKED AS THE 37TH WETTEST NOVEMBER ON
RECORD. NEARLY HALF OF THE TOTAL MONTHLY PRECIPITATION FELL ON JUST
TWO DAYS, THE 17TH AND 18TH WITH 1.56 INCHES BEING MEASURED. A TOTAL
OF 11 DAYS SAW MEASURABLE PRECIPITATION FALL.

THERE WAS ONLY A TRACE OF SNOWFALL RECORDED IN NOVEMBER. SINCE A
TRACE IS CONSIDERED NON-MEASURABLE, THIS TIED WITH 7 OTHER YEARS IN
WHICH NO MEASURABLE SNOWFALL OCCURRED IN NOVEMBER. FIVE OF THESE 8
YEARS WITH NO MEASURABLE SNOWFALL HAVE OCCURRED SINCE 2001.

$$



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