Biggest Snowfalls In Above-Freezing Temperatures
April 2018 Weather Recap - Chilly, Snowy, Rainy

Biggest Warmups Following A Snowstorm




Less than 12 hours after the the last snowflakes fell from the 8.4" snowstorm of March 21-22, 2018, the temperature rose to 50° later that afternoon.  This was the greatest rebound in temperature following a snowfall of six inches or more since 1915 (when the high reached 51° the day after a snowfall of 10.2" on April 3).  Looking at lesser snowfalls (between two and six inches), there have been six that were followed by even milder temperatures, with the the warmest reading being 58° the day after a snowfall of 2.8" on March 13, 1943.  (Coincidentally, in March 1964, on the same dates as this year's 8.4" snowfall, a high of 50° was also reached the afternoon following a snowfall of 4.9".)  And looking at major snowstorms (accumulations of a foot or more), the biggest warm-up came after the 16-inch snowstorm of Dec. 20-21, 1948, when the high reached 42° on the afternoon of the 21st.


Going back to 1900, there have been five snowfalls of six inches or more that have been followed by a high of 45° or milder (either during the afternoon of the day of the snowfall or, if snow continued in the PM hours, the following day).  By contrast there have been twenty snowfalls between two to six inches that have been followed by temperatures of 45+.


Chart - Warm-up after Snowstorms

 Chart - Warmup after snow


Previously, I posted an analysis that examined significant snowfalls that occurred the day after mild temperatures.  It can be found here.


March 21 snowfall
Snowy day in SoHo (March 21, 2018)


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