Temperature averaged 46 degrees F, according to the preliminary monthly climate data for April 2016 in Grand Rapids, MI. The cumulative reported total anomaly year to date therefore falls from +9.3 last month to +7.3 degrees F in April.
Using the full NOW data set going back to about 1892, however, the cumulative temperature anomaly for the first four months of 2016 is +13.4 degrees F.
Precipitation was a reported 0.57 inches above normal, coming in at 3.92 inches.
Snowfall was 9.4 inches, 7.1 inches above the mean average of 2.3 for the month, calculated going back to the beginning of the record. Snowfall has come to 61.1 inches to date, 4.7 inches below the long term mean average of 65.8 inches to date, with two months left in the measuring period.
Heating degree days in April at 564 were just above normal, only 1.8% above the very long term mean of 554. The long term mean expected HDD to date would be 6411. Actual to date were 5390, 15.9% below normal, thanks to the El Nino, with two months left in the measuring period.
It is notable that neither this El Nino nor any other since 1950 has come close to producing the warm winter Grand Rapids experienced in 2011-2012 when the heating degree day measurement hit an all time record low of 5253. Placeholders two and three for warmest winters by HDD after 2011-12 were 1920-21 at 5520 and 1931-32 at 5619.
Average temperature in Grand Rapids was also an all time high 52.8 degrees F (mean is 48) in 2012. The only other years which came close were 1931 and 1921, both at 52.2.
The difference between the first four months of 2016 and of 2012 is cumulative anomalies of +13.4 vs. +18.5 degrees, or an average temperature monthly of 35.525 now vs. 40.15 degrees then.
