Climatological Report (Monthly)
Issued by NWS Northern Indiana

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000
CXUS53 KIWX 011012
CLMFWA

CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
609 AM EDT SUN OCT 1 2017

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

...THE FORT WAYNE CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1897 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             100   09/02/1953
 LOW               29   09/23/1995
                        09/29/1951
HIGHEST            92   09/22        MM      MM       92  09/07
LOWEST             42   09/30        MM      MM       47  09/27
AVG. MAXIMUM     77.3              76.0     1.3     79.4
AVG. MINIMUM     54.5              52.6     1.9     57.9
MEAN             65.9              64.3     1.6
DAYS MAX >= 90      4               1.2     2.8        2
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.1    -0.1        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.44   1933
 MINIMUM         0.34   1979
TOTALS           1.67              2.80   -1.13     5.44
DAILY AVG.       0.06              0.09   -0.03     0.18
DAYS >= .01         9               9.1    -0.1       10
DAYS >= .10         4               5.3    -1.3        8
DAYS >= .50         1               2.2    -1.2        4
DAYS >= 1.00        1               0.7     0.3        2
GREATEST
 24 HR. TOTAL    1.07   09/19 TO 09/19

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2003
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 >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0
 24 HR TOTAL      0.0   09/30 TO 09/30

DEGREE_DAYS
HEATING TOTAL      80               104     -24       24
 SINCE 7/1         95               116     -21       27
COOLING TOTAL     117                83      34      143
 SINCE 1/1        805               800       5     1069
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.0
HIGHEST WIND SPEED/DIRECTION    28/230    DATE  09/04
HIGHEST GUST SPEED/DIRECTION    39/290    DATE  09/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           11
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY          7

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       1
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      3
HAZE                      2

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

&&

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

SEPTEMBER WAS A WARM AND DRY MONTH WHICH EXPERIENCED FOUR 90 DEGREE
DAYS. THIS MATCHED THE TOTAL NUMBER OF 90 DEGREE DAYS IN JUNE (4)
AND WAS JUST 2 LESS THAN THE COMBINED MONTHS OF MAY, JUNE, JULY AND
AUGUST WHICH HAD A TOTAL OF SIX 90 DEGREE DAYS. ABOUT 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 5 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 IN THIS PERIOD AT LEAST 11 DEGREES ABOVE NORMAL AND
THREE DAYS FROM THE 21ST TO THE 23RD HAD HIGH TEMPERATURES OF 90
DEGREES OR WARMER. INCREASED CLOUDS AND HUMIDITY KEPT HIGH
TEMPERATURES ON THE 24TH AND 25TH AT 89 DEGREES BUT THE HIGH ON THE
26TH REACHED 90 AGAIN.

SO JUST HOW WARM WAS THIS PERIOD FROM THE 20TH TO THE 26TH COMPARED
TO PREVIOUS YEARS? THE AVERAGE TEMPERATURE DURING THIS STRETCH WAS
76.2 DEGREES WITH 4 DAYS HAVING A HIGH TEMPERATURE OF 90 OR HIGHER.
THIS WAS THE WARMEST STRETCH ON RECORD BETWEEN THESE DATES,
SURPASSING 1920 WHICH HAD AN AVERAGE TEMPERATURE OF 73.6 DEGREES.

THE AVERAGE MONTHLY TEMPERATURE FOR SEPTEMBER 2017 WAS 65.9, 1.6
DEGREES ABOVE NORMAL. THIS RANKED AS THE 43RD WARMEST SEPTEMBER ON
RECORD. THE HIGHEST TEMPERATURE WAS 92 ON THE 22ND AND THE COOLEST
TEMPERATURE WAS 42 ON THE 30TH.

THERE WAS JUST 1.67 INCHES OF PRECIPITATION RECORDED, 1.13 INCHES
BELOW NORMAL. THIS RANKED AS THE 30TH DRIEST SEPTEMBER ON RECORD.

$$
LASHLEY



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