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

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CXUS53 KOAX 190444
CLMOFK

CLIMATE REPORT
NATIONAL WEATHER SERVICE OMAHA NEBRASKA
1032 AM CDT TUE MAY 1 2018

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

...THE NORFOLK CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

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

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            85   04/30
LOWEST              6   04/04
AVG. MAXIMUM     53.4              61.9    -8.5
AVG. MINIMUM     29.1              37.3    -8.2
MEAN             41.2              49.6    -8.4
DAYS MAX >= 90      0
DAYS MAX <= 32      3
DAYS MIN <= 32     19
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.47   1984
 MINIMUM         0.11   1928
TOTALS           1.32              2.65   -1.33
DAILY AVG.       0.04
DAYS >= .01         8
DAYS >= .10         5
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.47   04/13 TO 04/14

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.2   1984
TOTALS           10.9               2.6
SINCE 7/1        45.2

DAYS >= 1.0         3  GREATEST SNOW DEPTH         5   04/15

                        04/14
 24 HR TOTAL      5.2   04/14 TO 04/14

DEGREE DAYS
HEATING TOTAL     715               474     241
 SINCE 7/1       6770              6423     347
COOLING TOTAL       9                12      -3
 SINCE 1/1          9                12      -3
.................................................

WIND (MPH)
AVERAGE WIND SPEED              12.4
HIGHEST WIND SPEED/DIRECTION    39/180    DATE  04/30
HIGHEST GUST SPEED/DIRECTION    54/010    DATE  04/14

SKY COVER
AVERAGE SKY COVER           0.40


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               1
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN                8     FREEZING RAIN              2
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                1     SNOW                       2
LIGHT SNOW                9     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      1
HAZE                      3



-  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.

&&


...APRIL SUMMARY FOR NORFOLK...

APRIL WAS COLDER AND DRIER THAN NORMAL. IN FACT, APRIL 2018 WAS THE
2ND COLDEST ON RECORD. AS YOU MIGHT EXPECT, SEVERAL NEW TEMPERATURE
RECORDS WERE ESTABLISHED DURING THE MONTH, SOME GOING BACK OVER 80
YEARS. ONE NEW SNOWFALL RECORD WAS ALSO SET.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 41.3 DEGREES OR 8.3 DEGREES
BELOW NORMAL. THE LAST TIME IT WAS THIS COLD WAS ALMOST 100 YEARS AGO
IN 1920 WHEN THE AVERAGE TEMPERATURE FOR THE MONTH WAS 40.5 DEGREES,
THE COLDEST APRIL ON RECORD. HERE IS A LIST OF NEW RECORDS FOR APRIL.

APRIL 7  RECORD LOW OF 11. OLD RECORD 12 SET IN 1936.
APRIL 14  RECORD LOW MAXIMUM OF 34. OLD RECORD 37 SET IN 1996.
APRIL 15  RECORD LOW MAXIMUM OF 28. OLD RECORD 34 SET IN 2000.
APRIL 19  RECORD DAILY SNOWFALL OF 3.9 INCHES. OLD RECORD 1.8
           INCHES SET IN 2013.

APRIL WAS ALSO DRIER THAN NORMAL WITH 1.32 INCHES OF PRECIPITATION
RECORDED. THIS WAS 1.33 INCHES BELOW NORMAL.

MOST OF THE MONTH WAS CONSISTENTLY COLD WITH ONLY A COUPLE OF SHORT
2 DAY PERIODS FROM THE 11TH  12TH AND THE 29TH  30TH THAT AVERAGED
ABOVE NORMAL, THE REST OF THE DAYS WERE AT OR BELOW NORMAL. SNOW WAS
RECORDED ON 9 DAYS WITH A MONTHLY SNOWFALL TOTAL OF 10.9 INCHES,
THIRD SNOWIEST ON RECORD. THE GREATEST 24HR SNOWFALL WAS 5.2 INCHES
ON THE 14TH AND GREATEST SNOW DEPTH WAS 5 INCHES ON THE 14TH AND 15TH.

THE HIGHEST WINDS OF THE MONTH OCCURRED ON THE 14TH WITH GUSTS
REACHING 54 MPH FROM THE NORTH.

THE COMBINATION OF STRONG NORTH WINDS WITH SNOW AND BLOWING SNOW ON
THE 14TH PRODUCED A SIGNIFICANT WINTER STORM IN THE AREA WITH NEAR
BLIZZARD CONDITIONS AS VISIBILITY DROPPED TO A QUARTER MILE OR LESS
AT TIMES.

$$



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