Record snowfall in New England

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Record snowfall in New England

Postby Stephen Burt » 2015 Feb 20, 22:35

From Blue Hill Observatory, just 15 km outside Boston: the longest unbroken climatological record in the US (back to 1885 - featured in my book, pp 25-26):

http://bluehill.org/observatory/2015/02 ... ll-record/

Here's the text - some amazing photographs on the site too:

The unprecedented and relentless snowfall across New England since the last week of January continues with another very significant storm on 14-15 February, 2015 and more light snow on the following days. The final snowfall total for the 14-15 February storm was 21.6 inches [55 cm]. For a few hours before sunrise on the 15th, snow was falling at the rate of three or four inches [7-10 cm] per hour and about 12 inches [30 cm] fell in roughly three hours. A total liquid equivalent of 1.17 inches [29.7 mm] was measured, which gives a snow to water ratio of 18:1 due to the very cold air in place during this storm.

An additional 2.0 inches [5 cm] of light snow was measured on February 17th, and 4.2 inches of snow was recorded on February 18-19th.

The snow depth on the summit of Great Blue Hill reached a high of 46 inches [117 cm] on the morning of Feb. 15th. This surpassed the previous record for the greatest average snow depth ever measured at the Observatory, which was 43 inches in March 1969. The liquid equivalent of water in all of the snow on the ground is now approximately nine inches or more.

The latest big snowstorm will likely set a new daily snowfall record for Feb. 15th, with more than 16 inches of snow occurring on that day alone. The current record for Feb. 15th is 11.2 inches in 1940. This storm was the 7th greatest snowfall ever observed in February. Three of the 13 greatest snowstorms ever observed at Blue Hill have occurred in the last three weeks.

Through 1 PM on February 20th, the monthly snowfall has reached 77.5 inches [197 cm], which is a new monthly snowfall record for February and for any month. The combined January-February snowfall has reached 120.4 inches, which is a new record, surpassing the previous total of 77.9 inches in 1948. The combined snowfall for the winter months (December-February) has reached 122.7 inches, which is a new record, surpassing the previous total of 117.4 inches in 1947-1948. The snowfall for the entire season so far has climbed to 131.4 inches [334 cm], which is now third on the top ten list of snowiest seasons. The snow depth on the ground has exceeded 20 inches for 18 consecutive days (through Feb 20th), which is the sixth longest duration on record. This season is sure to climb higher on this list, since the current record snow depth will not diminish quickly with cold air remaining in place for another week or more.
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Stratfield Mortimer, Berkshire - central southern England
51.4°N, 1.0°W, 60 m AMSL, station grade A - AAAA47R
Records commenced here 1987 - local records available back to 1862
The Weather Observer's Handbook: www.measuringtheweather.com
Stephen Burt
 
Posts: 247
Joined: 2011 Dec 02, 19:36
Location: Stratfield Mortimer, Berkshire; a well-exposed rural site, 10 km SW of Reading

Re: Record snowfall in New England

Postby Stephen Burt » 2015 Feb 20, 22:40

As a postscript to this, at Mount Washington in New Hampshire (about 100 km NW of Boston, and at 1917 m, at 1500 EST this afternoon the air temperature was -28°C, the wind NW 81 mph gusting 87, the windchill -53°C. Brr!
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Stratfield Mortimer, Berkshire - central southern England
51.4°N, 1.0°W, 60 m AMSL, station grade A - AAAA47R
Records commenced here 1987 - local records available back to 1862
The Weather Observer's Handbook: www.measuringtheweather.com
Stephen Burt
 
Posts: 247
Joined: 2011 Dec 02, 19:36
Location: Stratfield Mortimer, Berkshire; a well-exposed rural site, 10 km SW of Reading

Re: Record snowfall in New England

Postby Eddy Graham » 2015 Feb 22, 22:17

Stephen

I see the 1000-500mb thicknesses over northern Ontario (south of Hudson Bay) are down to 480 dam at 12h today (see screenshot of FNMOC analysis below) - I have never seen such low values over North America at such a low latitude before... When I spent two years in Toronto 2000-2002, the lowest values were typically 492 dam over Hudson's Bay for no more than a day or two (they usually got advected eastwards quickly). Morning temps this morning over said-region were -35C to -40C (still far above the Canadian record of -64C at Baker Lake, but certainly noteworthy regardless).

Eddie
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Eddie Graham
Stornoway, Na h-Eileanan an Iar (Outer Hebrides), Scotland.

Stornoway town COL station, 20 AMSL, local records back to 1873.
Hebridean Weather Blog: http://bit.ly/1IFAPJa
Twitter Weather Feed: https://twitter.com/eddy_weather
Eddy Graham
 
Posts: 82
Joined: 2012 Jul 18, 17:09
Location: Stornoway, Scotland


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