Climatological Report (Seasonal)
Issued by NWS

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CXUS53 KIWX 011550
CLSSBN

CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
1044 AM EDT TUE SEP 1 2020

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

...THE SOUTH BEND CLIMATE SUMMARY FOR SUMMER 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1893 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             109   07/24/1934
 LOW               35   06/11/1972
                        06/02/1956
                        06/16/1917
HIGHEST            94   08/27        81      13       93
                        07/07
                        06/20
LOWEST             44   06/01        61     -17       45
AVG. MAXIMUM     85.0              81.1     3.9     80.8
AVG. MINIMUM     62.6              61.2     1.4     60.6
MEAN             73.8              71.1     2.7
DAYS MAX >= 90     21               8.7    12.3        6
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        19.30   2016
 MINIMUM         5.62   1991
TOTALS          10.33             11.55   -1.22    10.07
DAILY AVG.       0.11              0.13   -0.02     0.11
DAYS >= .01        25              29.7    -4.7       33
DAYS >= .10        15              19.6    -4.6       26
DAYS >= .50         9               7.9     1.1        6
DAYS >= 1.00        3               2.9     0.1        1
GREATEST
 24 HR. TOTAL    1.70

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
 24 HR TOTAL       MM
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0      0.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE       0               0.0     0.0        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL      0.0   MM

DEGREE_DAYS
HEATING TOTAL      14                62     -48       46
 SINCE 7/1          1                18     -17        6
COOLING TOTAL     852               626     226      602
 SINCE 1/1        913               682     231      619
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
HIGHEST WIND SPEED/DIRECTION    35/160    DATE  06/09
HIGHEST GUST SPEED/DIRECTION    50/170    DATE  06/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.20
NUMBER OF DAYS FAIR           74
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
 11
  0
  0
  0
  0
  1
HAZE                      4

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

&&

..WARMER THAN THE SUMMER OF 2012...

THE AVERAGE MEAN TEMPERATURE OF 73.8 DEGREES RANKS AS THE 12TH
WARMEST SUMMER ON RECORD. THIS IS 2.7 DEGREES ABOVE NORMAL. THIS IS
WARMER THAN THE SUMMER OF 2012 (73.7), AND IS THE WARMEST SUMMER
SINCE 2005 (73.9). DIGGING A BIT DEEPER, THE MEAN MAXIMUM
TEMPERATURE WAS 85.0 DEGREES; 12TH WARMEST ON RECORD. THE MEAN
MINIMUM TEMPERATURE WAS 62.6 DEGREES; TIED FOR 15TH WARMEST.

THERE WERE 21 DAYS WITH A HIGH TEMPERATURE OF 90 DEGREES OR GREATER,
WHICH IS THE MOST SINCE 2012 (29). THIS TIES AS THE 32ND MOST 90-
DEGREE DAYS IN A SUMMER.

TOTAL PRECIPITATION FOR THE SUMMER TOTALED 10.33 INCHES, 1.22 INCHES
BELOW NORMAL. THIS RANKS AS THE 59TH DRIEST ON RECORD.

A MONTH-BY-MONTH SUMMARY IS BELOW.

JUNE

...13TH WARMEST JUNE ON RECORD; DRY UNTIL THE END...

JUNE BEGAN WITH A STRETCH OF EIGHT DRY DAYS, ASIDE FROM A TRACE
OBSERVED ON THE 3RD. THE FINAL TWO DAYS OF MAY WERE DRY AS WELL.
HIGH TEMPERATURES SOARED QUICKLY INTO THE 80S AND 90S. IT WAS BREEZY
AS WELL AND ALL OF THIS COMBINED TO QUICKLY DRY THE AREA`S TOP SOIL.
MUCH OF INDIANA WAS DECLARED "ABNORMALLY DRY" ON THE UNITED STATES
DROUGHT MONITOR THAT WAS PREPARED ON THE 16TH, AND PUBLISHED JUNE
18TH. BY JUNE 16TH, SOUTH BEND WAS ALREADY 1.42" BELOW NORMAL ON
RAINFALL, HAVING ONLY RECEIVED 0.67".

THE RAINFALL STORY CHANGED IN THE LAST HALF OF THE MONTH AS SLOW-
MOVING THUNDERSTORMS DOTTED THE AREA. THIS RESULTED IN SOAKING
RAINFALL FOR SOME, WHILE OTHERS REMAINED DRY. SOUTH BEND PICKED UP
2.69" COMBINED ON THE 21ST AND 22ND. THE MONTH`S RAINFALL TOTAL WAS
4.50", WHICH IS IS 0.71" ABOVE NORMAL. THIS TIES 1919 AS THE 38TH
WETTEST ON RECORD.

ONE RECORD WAS BROKEN THIS MONTH: DAILY PRECIPITATION ON THE 21ST.
1.70" WAS OBSERVED, WHICH BROKE THE PREVIOUS RECORD OF 1.21" IN 1907.

SOUTH BEND ALSO PICKED UP FOUR DAYS WHERE THE HIGH REACHED AT LEAST
90 DEGREES. ZERO 90-DEGREE DAYS WERE OBSERVED IN JUNE 2019. FOR THE
CALENDAR YEAR, FIVE 90-DEGREE DAYS HAVE BEEN OBSERVED. THE AVERAGE
TEMPERATURE FOR THE MONTH WAS 72.1 DEGREES, WHICH IS 3.0 DEGREES
ABOVE NORMAL. THIS TIES 1952 AS THE 13TH WARMEST JUNE ON RECORD.

BROWN


JULY
...DRY CONDITIONS EXPAND ACROSS THE AREA...

JULY WAS NOTABLY HOT AND HUMID, WHICH OF COURSE TENDS TO HAPPEN IN
THE SUMMER MONTHS. HOWEVER, THE AVERAGE TEMPERATURE OF JULY 2020,
76.6 DEGREES, RANKS AS THE 13TH WARMEST ON RECORD. TEN 90-DEGREE
DAYS WERE OBSERVED THIS MONTH, WHICH IS THE GREATEST SINCE 2012 WHEN
THE TALLY WAS SIXTEEN. THERE WERE EIGHT CONSECUTIVE 90-DEGREE DAYS
FROM JULY 2 TO 9. THERE HAVE BEEN FIFTEEN 90-DEGREE DAYS SO FAR THIS
YEAR, TYING AS THE 34TH GREATEST.

THERE WAS ONE TEMPERATURE RECORD THIS MONTH. THE MINIMUM TEMPERATURE
OF 74 DEGREES ON THE 8TH TIES THE RECORD FOR WARMEST MINIMUM
TEMPERATURE SET IN 1928. ON THE TOPIC OF MINIMUM TEMPERATURES, THE
AVERAGE MINIMUM TEMPERATURE THIS MONTH WAS 66.4 DEGREES, WHICH RANKS
AS THE 10TH WARMEST ON RECORD.

RAINFALL WAS HARD TO FIND FOR MUCH OF THE AREA. JULY 1 STARTED WITH
MUCH OF INDIANA DECLARED AS "ABNORMALLY DRY" ON THE U.S. DROUGHT
MONITOR. BY MID-MONTH, PORTIONS OF NORTHERN INDIANA WERE DECLARED TO
BE PART OF A "MODERATE DROUGHT". BOTH OF THESE AREAS WERE FURTHER
EXPANDED BY THE END OF THE MONTH.

ONLY 2.66 INCHES OF RAIN WERE OBSERVED AT SOUTH BEND; 1.10 INCHES OF
WHICH FELL ON JULY 10TH. THIS MONTHLY TOTAL IS 1.34 INCHES BELOW
NORMAL AND RANKS AS THE 54TH DRIEST ON RECORD. THIS IS THE LEAST
AMOUNT OF RAINFALL AT SOUTH BEND SINCE JULY 2014 WHEN ONLY 1.79
INCHES FELL.

 BROWN/ROLLER

AUGUST
...SEVEN MORE 90-DEGREE DAYS...

BASED ON TOTAL RAINFALL AND AVERAGE TEMPERATURE, AUGUST 2020 WILL
GENERALLY SLIP SILENTLY INTO THE CLIMATE RECORDS. HOWEVER, THE DRY
SPELL FROM THE 11TH THROUGH 23RD EXASPERATED ALREADY DRY CONDITIONS
OVER THE AREA.

BY AUGUST 23RD, RAINFALL HAD BEEN OBSERVED ON ONLY THREE DAYS,
TOTALING 1.65". MONTH-TO-DATE PRECIPITATION WAS 1.16" BELOW NORMAL
BY THIS POINT. ZERO RAINFALL WAS OBSERVED FROM THE 11TH-23RD (13
DAYS). THE LONGEST STRETCH OF DAYS WITH ZERO PRECIPITATION IS 36
DAYS, WHICH ENDED IN SEPTEMBER OF 1908. AN AREA OF "MODERATE
DROUGHT" WAS ADDED TO PORTIONS OF NORTHERN INDIANA AND SOUTHERN
MICHIGAN ON THE AUGUST 25TH U.S. DROUGHT MONITOR MAP.

A SOAKING 1.22" OF RAIN THE 29TH, ALONG WITH A FEW OTHER RAIN EVENTS
AT THE END OF THE MONTH, BROUGHT THE RAIN TOTAL TO 3.17". THIS IS
ONLY 0.46" BELOW NORMAL. THIS TIES 1968 AS THE 56TH DRIEST AUGUST ON
RECORD.

SOUTH BEND PICKED UP SEVEN 90-DEGREE DAYS THIS MONTH. THIS IS THE
GREATEST TOTAL FOR THE MONTH SINCE 2001 (7). TO FIND A GREATER TOTAL
OF 90-DEGREE DAYS, TURN TO AUGUST 1988 WITH 14 90-DEGREE DAYS. THE
ANNUAL TOTAL TO DATE IS 22 90-DEGREE DAYS. THIS IS THE GREATEST
SINCE 2012 WHICH HAD 32 THROUGH THE END OF AUGUST.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 72.9 DEGREES, WHICH IS 1.6
DEGREES ABOVE NORMAL. THIS TIES AS THE 33RD WARMEST ON RECORD. THERE
WERE TWO TEMPERATURE RECORDS: RECORD WARM MINIMUM TEMPERATURES FOR
THE 25TH AND 28TH. THE MINIMUM TEMPERATURE ON THE 25TH TIED THE
RECORD OF 73 SET IN 1910. ON THE 28TH, THE MINIMUM TEMPERATURE TIED
THE RECORD OF 74 SET IN 1973.

BROWN

$$


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