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Boston Weather: 20.0°F | A Few Clouds

Weather: A Weather Oddity

By Greg Lawson
Staff Meteorologist

Hurricane season officially ended yesterday with a rare late season hurricane far out over the Atlantic. Hurricane Nicole surprised most forecasters when she became a hurricane on the 29th. If she was still a hurricane at midnight (last night), then she is the first December hurricane since Lili back in 1984. Nicole will not affect us here in any way.

However, we do continue to witness some rare weather events on our own here as well, namely the continuation of these unseasonably mild temperatures. The last two days have had highs and lows more than 10F higher than climatology. The mild weather here in the East can be explained by the persistent zonal (purely west-east motion) jet stream which has been piping-in mild Pacific maritime air and disallowing the typical intrusion of cold arctic air from Canada. It is more difficult to explain why there has been a persistent zonal jet. We are currently in a pretty solid, albeit relatively weak, La Nia stage. If we place any faith in statistics and correlations we should be in for a pretty nasty winter.

After spending a wonderfully mild night last night in the warm sector of the storm passing to our north, we got hit by the cold front this morning. Luckily, the fairly heavy rain which had been associated with this cold front back when it was over the Midwest has dissipated and we will only receive a few sprinkles this morning, if anything at all. The temperature today will reach 60F in the early afternoon and then begin to drop as the cold front ushers in cooler air. Still, the highs should stay in the upper 50s for the rest of the week. The clouds will begin clearing as a high pressure center nestles into the east and leaves us sometime late Wednesday night.

Today: Mild and windy as cold front passes. Drizzle possible in the morning. Westerly winds between 20 and 25 mph. High 60F (16C).

Tonight: Cooler. Winds weakening. Clouds begin to clear. Low 36F (2C).

Wednesday:Partly cloudy with mild temperatures in the afternoon. Light westerly wind. High 56F (13C). Low 42F (6C).

Thursday Outlook: More of the same, as for Friday too. Highs in the upper 50s (14-15C). Lows in the lower 40s (4-6C).