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

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000
CXUS53 KOAX 090553
CLAOFK

CLIMATE REPORT
NATIONAL WEATHER SERVICE OMAHA NEBRASKA
1055 PM CST TUE JAN 2 2018

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

...THE NORFOLK CLIMATE SUMMARY FOR THE YEAR OF 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1888 TO 2018

WEATHER         OBSERVED
                 VALUE   DATE(S)

................................
TEMPERATURE (F)
HIGHEST            98   07/25
LOWEST            -21   12/31
AVG. MAXIMUM     62.0
AVG. MINIMUM     38.7
MEAN             50.3
DAYS MAX >= 90     24
DAYS MAX <= 32     38
DAYS MIN <= 32    143
DAYS MIN <= 0       8

PRECIPITATION (INCHES)
TOTALS          27.79
DAYS >= .01        92
DAYS >= .10        55
DAYS >= .50        19
DAYS >= 1.00        7
GREATEST
 24 HR. TOTAL    1.95   MM

SNOWFALL (INCHES)
TOTALS           31.0
DAYS >= TRACE      43
DAYS >= 1.0        12
GREATEST
 SNOW DEPTH         6   02/24
                        01/26
                        01/25
 24 HR TOTAL      8.1   MM

DEGREE_DAYS
HEATING TOTAL    6131
COOLING TOTAL     879
.................................

WIND (MPH)
HIGHEST WIND SPEED/DIRECTION    60/350    DATE  06/16
HIGHEST GUST SPEED/DIRECTION    74/350    DATE  06/16



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

&&

...2017 YEARLY CLIMATE SUMMARY FOR NORFOLK...

THE YEAR 2017 WAS WARMER THAN NORMAL, WITH NEAR-NORMAL PRECIPITATION
AND SNOWFALL. THE AVERAGE TEMPERATURE OF 50.3 DEGREES WAS THE 20TH
WARMEST ON RECORD AND 1.1 DEGREES ABOVE NORMAL. THE TOTAL
PRECIPITATION OF 27.79 INCHES WAS 0.38 INCHES ABOVE NORMAL AND THE
40TH WETTEST ON RECORD. THE CALENDAR YEAR SNOWFALL TOTAL OF 31.0
INCHES WAS 0.5 INCHES ABOVE NORMAL AND THE 27TH HIGHEST ON RECORD
FOR A CALENDAR YEAR.

JANUARY WAS THE 32ND WARMEST AND 23RD WETTEST ON RECORD, WITH THE
SNOWFALL RANKING AS THE 15TH SNOWIEST. ONE OF THE HIGHEST-IMPACT
WEATHER EVENTS OF 2018 WAS THE ICE/WINTER STORM ON JANUARY 15-16
(MARTIN LUTHER KING JR. HOLIDAY WEEKEND), WITH ICE ACCUMULATIONS OF
AROUND A QUARTER INCH AROUND NORFOLK. UNLIKE AREAS FURTHER SOUTH,
PRECIPITATION DID FALL AS SNOW DURING JANUARY, INCLUDING 2.1 INCHES
ON THE 11TH TO 12TH AND 8.5 INCHES ON THE 24TH TO 25TH. A FEW WARM
PERIODS WERE DISPERSED THROUGH JANUARY, AS WELL, INCLUDING TWO
RECORD WARM MINIMUM TEMPERATURES ABOVE THE FREEZING MARK.

FEBRUARY WAS THE 9TH WARMEST ON RECORD, WITH AN AVERAGE TEMPERATURE
THAT WAS 7.3 DEGREES ABOVE NORMAL. FEBRUARY 2017 TIED THE RECOD FOR
CONSECUTIVE DAYS REACHING 60 DEGREES OR GREATER (7). SEVERAL WARM
TEMPERATURE RECORDS WERE SET IN THE MIDDLE OF THE MONTH. FEBRUARY
ALSO WAS THE 39TH WETTEST AND 18TH SNOWIEST ON RECORD. SNOW FELL IN
TWO BATCHES, THOUGH. A STORM SYSTEM ON THE 7TH TO 8TH BROUGHT 5.0
INCHES OF SNOW. LATER IN THE MONTH, A STORM TOTAL OF 6.0 INCHES OF
SNOW ON THE 23RD TO 24TH COMBINED WITH WIND GUSTS OF 41 MPH TO
PRODUCE SOME BLOWING SNOW IN AREAS AROUND NORFOLK.

FOR THE WINTER MONTHS OF DECEMBER 2016 THROUGH FEBRUARY 2017, THE
AVERAGE TEMPERATURE OF 27.1 DEGREES WAS 2.5 DEGREES ABOVE NORMAL AND
THE 20TH WARMEST WINTER ON RECORD. THE TOTAL PRECIPITATION WAS 3.08
INCHES, WHICH WAS 0.98 INCHES ABOVE NORMAL AND THE 19TH WETTEST ON
RECORD. THE SNOWFALL FOR JUST DECEMBER THROUGH FEBRUARY WAS 25.6
INCHES, WHICH WAS 7.7 INCHES ABOVE NORMAL. THE WINTER SEASON 2016-17
SNOWFALL WAS 32.2 INCHES, WHICH WAS 1.2 INCHES ABOVE NORMAL AND THE
38TH SNOWIEST WINTER ON RECORD FOR A WINTER SEASON (FOR WINTERS
WITHOUT MISSING DATA).

MARCH WAS THE 30TH WARMEST ON RECORD, WITH SLIGHTLY BELOW-NORMAL
PRECIPITATION AND BELOW-NORMAL SNOWFALL. GUSTY 54-MPH WINDS BROUGHT
WARM TEMPERATURES AND THUNDER ON THE 6TH, AND AS COOL WEATHER
FOLLOWED AT MID-MONTH, 1.3 INCHES OF SNOW FELL ON THE 13TH TO 14TH.
MARCH ENDED WITH A LONG STREAK OF OVERCAST OR NEARLY OVERCAST SKIES
AND SEVERAL RAINY DAYS.

APRIL WAS THE 27TH WETTEST ON RECORD, WITH TEMPERATURES VERY CLOSE
TO NORMAL. CLOUDY CONDITIONS FROM MARCH CONTINED INTO EARLY APRIL,
WITH THE FIRST SUNSHINE ON THE 6TH. THE LAST HARD FREEZE OF THE COLD
SEASON OCCURRED ON THE 11TH, AT 24 DEGREES. STRONG TO SEVERE STORMS
OCCURRED AROUND NORFOLK ON THE 15TH, INCLUDING STORMS THAT PRODUCED
HAIL UP TO 1.75 INCHES NEAR NORFOLK AND WIND DAMAGE ELSEWHERE IN
MADISON COUNTY. THE END OF THE MONTH WAS PARTICULARLY WET AND
CHILLY, WITH 0.5 INCHES OF SNOW ON THE 28TH AND A DAILY RECORD 1.83
INCHES OF PRECIPITATION ON THE 30TH.

MAY WAS SLIGHTLY COOLER AND SLIGHTLY WETTER THAN NORMAL, RANKING
NEAR THE MIDDLE OF THE PACK FOR BOTH TEMPERATURES AND PRECIPITATION.
IT WAS, HOWEVER, TIED FOR THE SNOWIEST MAY ON RECORD, WITH 1.5
INCHES OF SNOW ON THE 1ST THAT SET A DAILY RECORD, AS WELL AS TYING
A RECORD FOR ANY DAY IN MAY (WITH 5/9/1945) AND A MONTHLY RECORD
(WITH 1945). THE LOW TEMPERATURE OF 32 DEGREES ON THE 1ST WAS THE
LAST FREEZE OF THE COLD SEASON. TEMPERATURES MODERATED ABOVE NORMAL
BY THE 6TH, REACHING THE WARMEST READING OF THE MONTH ON THE 8TH.
SEVERE THUNDERSTORMS ON THE 15TH BROUGHT 58-MPH WIND GUSTS AND THE
BEGINNING OF A COOLER AND WETTER STRETCH OF MAY, WITH MEASURABLE
RAIN EACH DAY THROUGH THE 20TH AND WITH A RECORD COOL MAXIMUM
TEMPERATURE ON THE 20TH.

FOR THE SPRING MONTHS OF MARCH THROUGH MAY, THE AVERAGE TEMPERATURE
OF 49.4 DEGREES WAS 0.2 DEGREES ABOVE NORMAL AND THE 38TH WARMEST ON
RECORD. THE TOTAL PRECIPITATION OF 9.37 INCHES WAS 1.02 INCHES ABOVE
NORMAL AND THE 38TH WETTEST ON RECORD. THE SPRING MONTHS SAW 4.1
INCHES OF SNOWFALL, THE 28TH LOWEST ON RECORD FROM 1901 TO PRESENT
(WITH NUMEROUS MISSING YEARS).

JUNE WAS THE 31ST WARMEST ON RECORD, DESPITE NO PARTICULAR DAYS WITH
EXCEPTIONAL HEAT, AND THE 25TH DRIEST. ABOVE-NORMAL TEMPERATURES
DOMINATED FROM THE 1ST TO 12TH. THUNDERSTORMS ON THE 13TH BROUGHT
WIND GUSTS TO 61 MPH. ONE OF THE BIGGEST EVENTS OF THE YEAR WAS THE
OUTBREAK OF THUNDERSTORMS ON THE 16TH, WHICH BROUGHT WINDS GUSTING
TO 74 MPH, AS WELL AS NUMEROUS REPORTS OF WIND DAMAGE, HAIL, AND A
FEW TORNADOES ELSEWHERE IN NORTHEAST NEBRASKA. NORFOLK ESCAPED SOME
OF THE DRIER CONDITIONS SEEN JUST NORTH IN THE DAKOTAS, BUT THE AREA
DID BECOME ABNORMALLY DRY IN JUNE.

JULY WAS THE 36TH WARMEST AND THE 39TH DRIEST ON RECORD. THE 2.10
INCHES OF PRECIPITATION IN JULY FELL ON JUST 4 DAYS, THE 7TH FEWEST
ON RECORD, LEAVING THE AREA IN DRY CATEGORIES WITH RAIN THAT WAS NOT
VERY TIMELY, AND OVER HALF THE TOTAL FELL ON THE 26TH (1.23 INCHES).
THE LOWEST HIGH TEMPERATURE OF THE MONTH WAS 81 DEGREES ON THE 30TH,
WHICH IS THE 10TH WARMEST ON RECORD FOR JULY. SEVERAL DAYS OF
THUNDERSTORMS AND MEASURABLE RAIN WERE NOTED THROUGH THE MONTH,
INCLUDING 2.83 INCHES OF RAIN ON THE 26TH. THUNDERSTORMS BROUGHT
WINDS GUSTING TO 52 MPH ON THE 10TH.

AUGUST WAS THE 5TH COOLEST AND 10TH WETTEST ON RECORD, BRINGING
RELIEF TO THE BUILDING DRYNESS. THE TEMPERATURE NEVER REACHED 90
DEGREES IN AUGUST FOR THE FIRST TIME ON RECORD. ABOVE-NORMAL
TEMPERATURES WERE NTOED ON JUST FOUR DAYS IN THE MONTH, WITH THE
AVERAGE DAILY TEMPERATURES NO MORE THAN 3 DEGREES ABOVE NORMAL ON
ANY OF THOSE DAYS. THE WETTEST PART OF THE MONTH WAS IN THE MIDDLE,
THOUGH WET DAYS WERE DISPERSED WELL THROUGHOUT THE MONTH.

FOR THE SUMMER MONTHS OF JUNE THROUGH AUGUST, THE AVERAGE
TEMPERATURE OF 72.4 DEGREES WAS 0.3 DEGREES BELOW NORMAL AND RANKED
AS NEAR NORMAL IN THE MIDDLE OF THE PACK, AS A VERY COOL AUGUST
OFFSET A WARM JUNE AND JULY. THE TOTAL PRECIPITATION OF 10.17 INCHES
WAS 0.66 INCHES BELOW NORMAL AND ALSO RANKED NEAR THE MIDDLE OF THE
PACK, AS A VERY WET AUGUST OFFSET A DRY JUNE AND JULY.

SEPTEMBER TEMPERATURES BOUNCED BACK TO ABOVE NORMAL, AS THE 33RD
WARMEST SEPTEMBER ON RECORD, WITH JUST SLIGHTLY BELOW-NORMAL
PRECIPITATION. THE MONTH DID START ON THE COOL SIDE, WITH BELOW-
NORMAL TEMPERATURES STARTING THE MONTH. WARM TEMPERATURES DOMINATED
FROM THE 8TH TO 24TH AND ESPECIALLY FROM THE 19TH TO 24TH, INCLUDING
A RECORD WARM MINIMUM TEMPERATURES ON THE 22ND. PERIODIC RAIN FELL
THROUGHOUT THE MONTH, THOUGH AGAIN CONCENTRATED NEAR THE MIDDLE OF
THE MONTH.

OCTOBER WAS THE 14TH WETTEST ON RECORD, WITH NEAR-NORMAL
TEMPERATURES. IT ALSO RECORDED A TRACE OF SNOW, ONE OF 31 YEARS TO
RECORD A TRACE OF SNOW IN OCTOBER AMONG YEARS WITH COMPLETE RECORDS.
ALL OF THE RAIN FELL ON THE 1ST THROUGH THE 14TH, MAKING IT THE 2ND
WETTEST SUCH PERIDO ON RECORD. TEMPERATURES WERE MOSTLY ABOVE-NORMAL
THROUGH THE 14TH, BUT A BRIEF COOL-DOWN BROUGHT THE FIRST FREEZE OF
THE SEASON ON THE 11TH, ALSO A HARD FREEZE AT 25 DEGREES. A NEEDED
DRY PERIOD ARRIVED IN THE SECOND HALF OF THE MONTH, BUT WITH IT CAME
WINDY DAYS ON THE 20TH (44 MPH), 23RD (53 MPH), 24TH (49 MPH), 26TH
(59 MPH), AND 27TH (46 MPH). MUCH COOLER WEATHER ARRIVED AS
TEMPERATURES FELL THROUGH THE 27TH TO 28TH, WIHT A TRACE OF SNOW ON
THE 26TH. COOL TEMPERATURES WERE NOTED ON THE 30TH (WITH BRISK 46-
MPH WINDS) AND ESPECIALLY THE 31ST, WITH FLURRIES ON BOTH DAYS.
NORFOLK AREA TRICK-OR-TREATERS FACED BRISK CONDITIONS, AS THE HIGH
TEMPERATURE ON THE 31ST WAS JUST 35 DEGREES.

NOVEMBER WAS THE 13H DRIEST ON RECORD AND THE 38TH WARMEST, WITH
JUST A TRACE OF SNOW. FROM THE 1ST THROUGH 13TH, TEMPERATURES WERE
BELOW NORMAL ON MOST DAYS, WITH MEASURABLE RAIN ONLY ON THE 12TH.
FROM THE 14TH TO THE 30TH, ALL BUT FIVE DAYS HAD ABOVE-NORMAL
TEMPERATURES. A COLD FRONT ON THE 17TH TO 18TH BROUGHT THE ONLY
OTHER MEASURABLE RAIN OF THE MONTH. TEMPERATURES WERE WARM AROUND
THANKSGIVING, WITH A DAILY RECORD HIGHS ON THE 23RD.

FOR THE FALL MONTHS OF SEPTEMBER THROUGH NOVEMBER, THE AVERAGE
TEMPERATURE OF 51.9 DEGREES WAS 1.5 DEGREES ABOVE NORMAL AND THE
34TH WARMEST ON RECORD. THE TOTAL PRECIPITATION OF 5.69 INCHES WAS
0.44 INCHES BELOW NORMAL AND RANKED NEAR THE MIDDLE OF THE PACK, AS
A VERY DRY NOVEMBER FOLLOWED A WET SEPTEMBER AND OCTOBER. ONLY A
TRACE OF SNOW WAS RECORDED, ONE OF ONLY 8 YEARS ON RECORD TO NOT
RECORD MEASURABLE SNOW IN THE FALL MONTHS (FOR YEARS WITHOUT MISSING
DATA).

DECEMBER WAS THE 32ND DRIEST, WITH AN AVERAGE TEMPERATURE THAT WAS
SLIGHTLY ABOVE NORMAL AND RANKED NEAR THE MIDDLE OF THE PACK. IT
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 11TH WARMEST FOR THE SAME DATES. JUST 0.01
INCHES OF PRECIPITATION FELL IN THAT PERIOD AND ONLY A TRACE OF
SNOW. THE PATTERN CHANGE BEGAN ON THE 21ST, WITH 1.0 INCHES OF SNOW,
WHICH WAS THE 3RD LATEST FIRST MEASURABLE SNOW ON RECORD FOR
NORFOLK. THE 21ST ALSO WAS THE LAST DAY OF THE MONTH THAT ROSE ABOVE
FREEZING. THE 1.0 INCHES OF SNOW ON THE 23RD-24TH ENSURED A WHITE
CHRISTMAS, WITH FLURRIES OR LIGHT SNOW ON SEVERAL DAYS THROUGH THE
END OF THE MONTH. A RECORD LOW OF -15 WAS SET ON THE 27TH, AND THE
BITTEREST COLD ARRIVED ON NEW YEARS EVE, WITH A RECORD COLD HIGH OF
ONLY -6 DEGREES AND A LOW OF -21. THE AVERAGE TEMPERATURE OF 0.1
DEGREES FOR DECEMBER 25-31 WAS THE COLDEST ON RECORD FOR THAT LAST
WEEK OF THE YEAR.

                       2017 STATISTICS
          TEMPERATURE                   PRECIPITATION
MONTH  AVG. DEPART.  MAX  MIN     TOTAL  DEPART. SNOW/SLEET TSTORM DAYS
JAN    23.9   1.3     50   -8     1.25    0.66   11.0         0
FEB    34.1   7.3     74    1     0.99    0.23   11.0         0
MAR    40.0   2.6     80   15     1.21   -0.56    2.1         1
APR    49.4  -0.2     78   24     3.83    1.18    0.5         6
MAY    58.8  -1.7     89   32     4.33    0.40    1.5         5
JUN    72.2   2.0     95   44     2.47   -1.79      0         8
JUL    76.9   1.9     98   51     2.10   -1.22      0         5
AUG    68.2  -4.6     87   47     5.60    2.35      0        11
SEP    65.9   2.1     94   39     2.08   -0.61      0         6
OCT    51.4   0.4     79   14     3.52    1.45      T         5
NOV    38.4   2.0     72   10     0.09   -1.28      T         0
DEC    24.6   0.3     58  -21     0.32   -0.43    4.9         0
YEAR   50.3   1.1     98  -21    27.79    0.38   31.0        47

           DEGREE DAYS
MONTH  HEATING  DEPART.  COOLING  DEPART.
JAN      1268     -48         0       0
FEB       857    -214         0       0
MAR       766     -90         0       0
APR       458     -16         0     -12
MAY       217      27        28     -21
JUN        12     -18       237      51
JUL         0      -4       377      63
AUG        11      -1       116    -139
SEP        82     -44       116      26
OCT       420     -23         5      -4
NOV       793     -67         0       0
DEC      1247     -14         0       0
YEAR     6131    -512       879     -36

       WIND GUST    SEA LEVEL PRESSURE
MONTH  MAX          MAX     MIN
JAN    46           30.76   29.34
FEB    41           30.65   29.51
MAR    54           30.68   29.15
APR    45           30.33   29.45
MAY    58           30.15   29.20
JUN    74           30.32   29.42
JUL    52           30.20   29.65
AUG    43           30.22   29.72
SEP    41           30.29   29.44
OCT    59           30.48   29.45
NOV    49           30.52   29.44
DEC    58           30.98   29.37
YEAR   74           30.98   29.15

       EXTREMES                    READING   DATE
WARMEST HIGH TEMPERATURE            98       JULY 25
COLDEST HIGH TEMPERATURE            -6       DECEMBER 31
COLDEST LOW TEMPERATURE            -21       DECEMBER 31
WARMEST LOW TEMPERATURE             75       JULY 21
LAST SPRING FREEZE (32 DEGREES)     32       MAY 1
FIRST FALL FREEZE (32 DEGREES)      30       OCTOBER 10
HIGHEST DAILY PRECIPITATION          1.83    APRIL 30
HIGHEST DAILY SNOWFALL               5.0     JANUARY 24
HIGHEST SNOW DEPTH                   6       JANUARY 25-26, FEBRUARY 24
LAST MEASURABLE SNOW (2016-17)       1.5     MAY 1
FIRST MEASURABLE SNOW (2017-18)      1.0     DECEMBER 21
HIGHEST WIND GUST                   74       JUNE 16
HIGHEST SURFACE PRESSURE            30.98    DECEMBER 31
LOWEST SURFACE PRESSURE             29.15    MARCH 6

   DAILY RECORDS SET IN 2017
DATE          RECORD         READING    PREVIOUS RECORD
JANUARY 19    WARM MIN TEMP   37        32 (2015)
JANUARY 20    WARM MIN TEMP   33        31 (2006)
JANUARY 24    PRECIPITATION    0.38     0.25 (1991)
JANUARY 24    SNOWFALL         5.0      2.5 (1991)
FEBRUARY 16   WARM MAX TEMP   68        68 (TIES WITH 1981)
FEBRUARY 19   WARM MIN TEMP   39        38 (2016)
FEBRUARY 21   WARM MAX TEMP   74        74 (TIES WITH 1995)
APRIL 30      PRECIPITATION    1.83     1.35 (1972)
MAY 1         SNOWFALL         1.5      0.5 (1911)
MAY 20        COLD MIN TEMP   48        49 (1915)
JUNE 11       WARM MIN TEMP   73        72 (2016, 1952, 1933)
JUNE 24       COLD MIN TEMP   45        46 (2004)
JUNE 27       COLD MIN TEMP   46        46 (TIES WITH 1968)
AUGUST 5      COLD MAX TEMP   65        68 (1992)
SEPTEMBER 22  WARM MIN TEMP   75        67 (2016)
OCTOBER 1     PRECIPITATION    0.84     0.78 (1950)
NOVEMBER 23   WARM MAX TEMP   72        66 (1902)
DECEMBER 27   COLD MIN TEMP  -15        -14 (1894)
DECEMBER 31   COLD MAX TEMP   -6        -5 (1927)

   MONTHLY RECORDS SET IN 2017
DATE          RECORD           READING    PREVIOUS RECORD
MAY 1         DAILY SNOWFALL     1.5      1.5 (TIES WITH 5/9/1945)
MAY           MONTHLY SNOWFALL   1.5      1.5 (TIES WITH 1945)

$$
MAYES


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