Thursday, May 3, 2012

Jan. 1 -Apr. 30, 2012 Warmest on Record, Lincoln, NE

January 1 -  April 30, 2012 Warmest on Record for Lincoln, NE

The time period of January 1 through April 30, 2012 was the warmest on record for Lincoln Nebraska with data extending back 126 years to 1887.

The above graph shows the daily departures from normal for Lincoln's temperatures.  The magnitude of the departure is illustrated by the length of each vertical bar.  Blue indicates below normal and red above normal.

The daily normals change throughout the time period, so the graph shows the daily departures relative to what the normal is for that day of the year  For example, on January  30, 2012 the high was 70F, and the low was 34F for a daily average of 52F which was 27 degrees ABOVE the normal daily average of 25F for that day of the year.  On February 11, 2012 the high was 17F and the low was -3F for a daily average of only 7F, which was 21 degrees BELOW the daily normal for that date of 28F.  April 2, 2012 had a high of 90F and a low of 57F with a daily average of 74F which was 27 degrees ABOVE the normal of 47F for that day of the year.  And yes, some days were exactly normal. For example, the daily average temperature on April 14 was 51F with a departure of 0 degrees from the normal of 51 F for that date.  The average temperature on February 19 was 30F with a 0 degree departure from the normal of 30F for that date.

There were totals of  85 days with daily average temperatures ABOVE normal, 29 days with daily average temperatures BELOW normal and 7 days with daily average temperatures exactly normal during January 1 through April 30, 2012  The following table lists the monthly totals for this time period.

Total Number of Days
Month      Above      Below     Exactly Normal 
January       22         9            0
February      14        11            4
March         30         1            0
April         19         8            3
Totals        85        29            7 

Here is a listing of the top ten warmest January 1-April 30 time periods for 1887 through 2012.

Lincoln, NE, 1887-2012
Warmest Average Temperature degrees F

Rank  Value  Ending Date
  1    43.1    4/30/2012 
  2    42.6    4/30/1946
  3    42.2    4/30/1921
  4    41.9    4/30/1992
  5    40.9    4/30/1987
  6    40.5    4/30/2006
  7    40.4    4/30/1931
  8    40.3    4/30/1981
  9    40.0    4/30/1990
10    39.9    4/30/2000

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