When was your earliest and latest ice day (0°C/ 32°F) on record? (climate, snowfall)
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I thought that the -1.1°C high on March 23th 2013 was pretty late and in fact it was the second latest ice day here since recordings began in 1949.
The latest was on March 27th 1952 with an even more impressing high of -1.8°C.
We did not have an ice day in April yet, but in 1966 we came close with two consecutive days having a high below 1°C (0.5°C and 0.4°C respectively) so with the right setup that should still be possible, especially considering that these two days were in Mid April.
As for the earliest ice day on record, it can appear in early November, November 3rd 1980 was the earliest here with a high of -0.7°C.
We had a snowfall day in October 24th 2003 (was also the earliest settling snow on record) when the high did not rose above 1.1°C, so if we get such an early snowfall again, it might be possible that an ice day could already occur in October, though the chance is not as high as in April.
Latest: 24 March 2013 (shown below as 25th because of 0000-0000 recording period)
The cold snap in late March 2013 was the most impressive weather event I can remember compared to what we can normally expect in our climate. I expect a bit of abnormal record-breaking warmth every few years, but I never thought we could possibly get prolonged low maxima and snow cover like this so late in the season. The oddest thing about it was that the exact same week the previous year had had some of the warmest weather ever seen so early!
^^ It was quite the same here too, first the coldest March on record (2013) and the year after the highs were three times above 19°C.
Both is awesome for me in March, my preference for winter weather is between Late November and Late February however i can still enjoy such a snowy stable March as well, we had a similiar run as well already in 2006 but this ended after equinox but in 2013 the cold spell ran straight through April and the high never rose above 6°C from March 8th to March 31st.
D.C./National: 13 Nov 1911 and 24 Mar 1906 (1940 as well, but record belongs to 1906)
Dulles: 21 Nov 1987 and 20 Mar 1965
BWI: Same dates as D.C.
Pittsburgh: 3 Nov 1951 and 18 Apr 1875, the latter the record coldest high for April and more than 20C below normal for the date!
Latest: 24 March 2013 (shown below as 25th because of 0000-0000 recording period)
The cold snap in late March 2013 was the most impressive weather event I can remember compared to what we can normally expect in our climate. I expect a bit of abnormal record-breaking warmth every few years, but I never thought we could possibly get prolonged low maxima and snow cover like this so late in the season. The oddest thing about it was that the exact same week the previous year had had some of the warmest weather ever seen so early!
Hmm. Would have guessed there wouldn't be much March-February difference as you don't have big temperature month to month and the seas are still cold. Ithaca, NY got 16 inches of snow on April 17, 2007 but the high was 33°F so ice day. Snow was gone after two days. One week later it reached 81°F.
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