Strong Weekend Cold Front


Terra MODIS Satellite imagery for Monday morning showing cumulus field behind the cold front - typical of cold air blowing over warm water.
Terra MODIS Satellite imagery for Monday morning showing cumulus field behind the cold front streaming across the Atlantic toward Bermuda – typical of cold air blowing over warm water.

Sunday night saw the passage of a strong cold front with little fanfare save for a wind shift and increase. Winds shifted to the north and increased to strong with gale force gusts early Monday morning ushering in a much colder airmass. The airmass originated in southeastern Canada and was responsible for the first snow of the season in that region and the Northeastern United States. Temperatures fell through the morning and struggled just below 70F around midday, then continued to fall overnight and fell to record lows, which are around 65F for this time of year – 64.2F at the airport and 63.8F at my PWS.

October Cold Front 2015 Temp
October Cold Front 2015 Dew The last week’s Temperature and Dew Point trace from my PWS.

Perhaps more notable than the increased winds and lower temperatures was the drop in humidity. While midday temperatures fell from around 80F on Sunday to around 70F on Monday, the dew points fell from near 70F on Sunday to around 50F on Monday.

This much cooler and less humid weather will not stick around. Winds have since shifted to the east-northeast as high pressure extends a ridge north of Bermuda. Low pressure forming to the south of the island in the next day or two should be monitored as it will strengthen the pressure gradient across Bermuda thus increasing those east-northeasterly winds to strong again and introducing chances for rain or showers by Friday. Keep up to date with the official forecasts from the Bermuda Weather Service.

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