Climatological Report (Monthly)
Issued by NWS Northern Indiana

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000
CXUS53 KIWX 012158
CLMFWA

CLIMATE REPORT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
452 PM EST MON JAN 1 2018

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

...THE FORT WAYNE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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              71   12/02/1982
 LOW              -18   12/22/1989
HIGHEST            61   12/04        MM      MM       60  12/26
LOWEST             -7   12/27        MM      MM       -9  12/19
AVG. MAXIMUM     35.3              36.2    -0.9     33.7
AVG. MINIMUM     18.8              22.1    -3.3     20.5
MEAN             27.1              29.1    -2.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     12              10.8     1.2       10
DAYS MIN <= 32     27              25.6     1.4       26
DAYS MIN <= 0       5               1.5     3.5        4

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.56   1990
 MINIMUM         0.34   1943
TOTALS           1.01              2.77   -1.76     2.31
DAILY AVG.       0.03              0.09   -0.06     0.07
DAYS >= .01        12              13.0    -1.0       13
DAYS >= .10         3               6.5    -3.5        5
DAYS >= .50         0               1.7    -1.7        2
DAYS >= 1.00        0               0.3    -0.3        0
GREATEST
 24 HR. TOTAL    0.34   12/24 TO 12/24

SNOWFALL (INCHES)
RECORDS
 TOTAL           20.3   1973
TOTALS           11.4               8.5     2.9     10.9
SINCE 7/1        11.4              10.6     0.8     11.3
SNOWDEPTH AVG.      1                 3      -2        2
DAYS >= 1.0         5               2.3     2.7        3
GREATEST
 SNOW DEPTH         5   12/30                          5
                        12/29
 24 HR TOTAL      3.6   12/24 TO 12/24

DEGREE_DAYS
HEATING TOTAL    1169              1111      58     1166
 SINCE 7/1       2222              2328    -106     2011
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        836               809      27     1104
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
HIGHEST WIND SPEED/DIRECTION    36/280    DATE  12/13
HIGHEST GUST SPEED/DIRECTION    44/290    DATE  12/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         17

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                2     SNOW                       5
LIGHT SNOW               16     SLEET                      0
FOG                      20     FOG W/VIS <= 1/4 MILE      2
HAZE                      9

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

&&

...IN WITH THE WARMTH, OUT WITH THE COLD...

AFTER A BRUTALLY COLD AND SNOWY STRETCH OF WEATHER TO END DECEMBER,
IT IS HARD TO REMEMBER THAT THE MONTH BEGAN WITH NEAR RECORD WARMTH
AND TEMPERATURES IN THE 50S AND 60S. THOSE WARM TEMPERATURES LASTED
ABOUT 5 DAYS BEFORE A 9 DAY STRETCH OF BELOW NORMAL TEMPERATURES
FOLLOWED BY ANOTHER PERIOD OF 8 DAYS ABOVE NORMAL. THAT WOULD BE THE
END TO ANY WARMTH THOUGH AS BITTERLY COLD AIR STRAIGHT OUT OF
SIBERIA FLUSHED INTO THE CENTRAL AND EASTERN UNITED STATES FOR THE
LAST 8 DAYS OF DECEMBER. TEMPERATURES WERE MORE THAN 20 DEGREES
BELOW NORMAL DURING THIS PERIOD WITH MEASURABLE SNOWFALL ON 7 OF THE
LAST 9 DAYS.

A FEW DAILY RECORDS WERE SET DURING THE MONTH. A RECORD COLD MAXIMUM
TEMPERATURE OF 9 DEGREES WAS RECORDED ON THE 26TH. THIS BROKE THE
PREVIOUS RECORD OF 12 SET IN 1925.  THIS HIGH OF 9 DEGREES WAS ALSO
THE 10TH COLDEST HIGH TEMPERATURE EVER RECORDED IN DECEMBER. A
RECORD DAILY SNOWFALL RECORD WAS ALSO SET ON THE 25TH. SNOWFALL OF
3.6 INCHES WAS RECORDED WHICH BROKE THE PREVIOUS DAILY RECORD OF 3.5
INCHES SET IN 1934.

THE MONTH ENDED WITH 7 STRAIGHT DAYS HAVING HIGH TEMPERATURES OF 20
DEGREES OR COLDER. THIS TIED AS THE LONGEST SUCH STREAK AT FORT
WAYNE. OTHER YEARS WITH THIS CONSECUTIVE STREAK INCLUDED 1917, 1945
AND 1958.

THE AVERAGE MONTHLY TEMPERATURE WAS 27.1, 2.0 DEGREES BELOW NORMAL.
THIS RANKED AS THE 38TH COLDEST DECEMBER ON RECORD AND IRONICALLY
TIED WITH 2016. THE WARMEST TEMPERATURE WAS 61 ON THE 4TH AND THE
COLDEST WAS 7 BELOW ON THE 27TH. THE PERIOD OF DECEMBER 25TH TO
DECEMBER 31ST HAD AN AVERAGE TEMPERATURE OF 7.2 DEGREES WHICH WAS
THE COLDEST EVER RECORDED DURING THIS 7 DAY STRETCH TO END THE
MONTH.

PRECIPITATION FOR THE MONTH WAS 1.01 INCHES, 1.76 INCHES BELOW
NORMAL. THIS WAS THE 18TH DRIEST DECEMBER ON RECORD, YET MEASURABLE
PRECIPITATION FELL ON 12 DAYS. DESPITE HAVING WELL BELOW NORMAL
PRECIPITATION, SNOWFALL FOR THE MONTH WAS ABOVE NORMAL. A TOTAL OF
11.4 INCHES WAS RECORDED WHICH WAS 2.9 INCHES ABOVE NORMAL. THIS
RANKED AS THE 17TH SNOWIEST DECEMBER ON RECORD. THE DISPARITY
BETWEEN PRECIPITATION AND SNOWFALL WAS DUE TO THE VERY COLD
TEMPERATURES AT THE END OF THE MONTH. THIS CREATED LARGE LIQUID TO
SNOW RATIOS WHICH LED TO VERY EFFICIENT SNOW MAKING PROCESSES.

$$
LASHLEY



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