Climatological Report (Monthly)
Issued by NWS Omaha/Valley, NE

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CXUS53 KOAX 030559
CLMOFK

CLIMATE REPORT
NATIONAL WEATHER SERVICE OMAHA NEBRASKA
1137 AM CST MON JAN 1 2018

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

...THE NORFOLK CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1888 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            58   12/03
LOWEST            -21   12/31
AVG. MAXIMUM     35.0              34.1     0.9
AVG. MINIMUM     14.1              14.5    -0.4
MEAN             24.6              24.3     0.3
DAYS MAX >= 90      0
DAYS MAX <= 32     11
DAYS MIN <= 32     30
DAYS MIN <= 0       5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         2.62   2006
 MINIMUM            T   1905
TOTALS           0.32              0.75   -0.43
DAILY AVG.       0.01
DAYS >= .01         6
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.10   12/21 TO 12/21

SNOWFALL (INCHES)
RECORDS
 TOTAL           30.8   2009
TOTALS            4.9               6.0
SINCE 7/1         4.9
SNOWDEPTH AVG.      0                 2      -2
DAYS >= 1.0         3
GREATEST
 SNOW DEPTH         3   12/31
 24 HR TOTAL      1.4   12/27 TO 12/27

DEGREE DAYS
HEATING TOTAL    1247              1261     -14
 SINCE 7/1       2553              2706    -153
COOLING TOTAL       0                 0       0
 SINCE 1/1        879               915     -36
.................................................

WIND (MPH)
AVERAGE WIND SPEED              11.2
HIGHEST WIND SPEED/DIRECTION    43/330    DATE  12/11
HIGHEST GUST SPEED/DIRECTION    58/310    DATE  12/04

SKY COVER
AVERAGE SKY COVER           0.40


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                1     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW               14     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      1
HAZE                      4

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
>= INDICATES GREATER THAN OR EQUAL TO.
<= INDICATES LESS THAN OR EQUAL TO.

&&

...DECEMBER WAS DRIER THAN NORMAL IN NORFOLK...WITH NEAR-NORMAL
TEMPERATURES...

WITH A WARM START AND A COLD FINISH, DECEMBER ENDED UP WITH AN
AVERAGE TEMPERATURE JUST 0.3 DEGREES ABOVE NORMAL. IT WAS DRIER AND
SLIGHTLY LESS SNOWY THAN NORMAL, WITH 4.9 INCHES OF SNOW FALLING 1.1
INCHES BELOW NORMAL AND WITH JUST 0.32 INCHES OF PRECIPITATION.

DECEMBER TRULY WAS THE TALE OF TWO PATTERNS, WITH A WARM BEGINNING
AND MIDDLE BUT A BITTERLY COLD FINISH. THE AVERAGE TEMPERATURE OF
34.2 DEGREES FOR DECEMBER 1-20 WAS THE 17TH WARMEST ON RECORD,
DRIVEN BY MAXIMUM TEMPERATURES THAT WERE THE 11TH WARMEST FOR THE
SAME DATES. JUST 0.01 INCHES OF PRECIPITATATION FELL IN THAT PERIOD,
ON THE 17TH BUT WITH JUST A TRACE OF SNOW. THE WARMEST TEMPERATURE
OF THE MONTH WAS 58 DEGREES ON THE 3RD, FOLLOWED BY 58 MPH WIND
GUSTS ON THE 4TH. THE 11TH WAS ANOTHER BREEZY DAY, WITH WIND GUSTS
REACHING 54 MPH.

THE PATTERN CHANGE BEGAN WITH THE WINTER SOLSTICE, ON THE 21ST, WITH
0.10 INCHES OF PRECIPITATION AND 1.0 INCHES OF SNOW. THIS WAS THE
FIRST MEASURABLE SNOWFALL OF THE YEAR, ARRIVING AS THE 3RD LATEST ON
RECORD. THE 21ST ALSO WAS THE LAST DAY OF THE MONTH THAT ROSE ABOVE
FREEZING, WITH TEMPERATURES FROM THE 22ND TO 31ST NEVER WARMER THAN
THE 27 DEGREES RECORDED ON THE 22ND. SNOW FELL AGAIN ON THE 23RD AND
24TH, TOTALING 1.0 INCHES AND ASSURING A WHITE CHRISTMAS.
PARTICULARLY COLD TEMPERATURES ARRIVED ON THE 26TH, WITH A HIGH OF
JUST 4 DEGREES AND A LOW OF -13. THE LOW ON THE 27TH FELL TO -15
DEGREES, A DAILY RECORD. ANOTHER SNOW FELL AGAIN ON THE 27TH,
RECORDING 1.4 INCHES, ALONG WITH 1.5 INCHES ON THE 29TH AND 30TH.
THE BITTEREST COLD ARRIVED ON NEW YEARS EVE, WITH A HIGH OF ONLY
-6 DEGREES SETTING A RECORD FOR COLDEST MAXIMUM TEMPERATURE AND A
LOW OF -21. THE HIGH ON THE 31ST MARKED THE FIRST TIME SINCE
DECEMBER 15, 2008, THAT THE MAXIMUM TEMPERATURE STAYED BELOW ZERO.
THE AVERAGE TEMPERATURE OF 0.1 DEGREES FOR DECEMBER 25-31 WAS THE
COLDEST ON RECORD FOR THAT LAST WEEK OF THE YEAR, WELL BELOW THE
PREVIOUS RECORD OF 4.8 DEGREES SET IN 1924.


DAILY RECORDS SET IN DECEMBER 2017:
DATE          RECORD           READING  PREVIOUS RECORD
DECEMBER 27   COLD MIN TEMP    -15      -14 (1894)
DECEMBER 31   COLD MAX TEMP     -6      -5 (1927)

$$

MAYES


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