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Boston Weather: 66.0°F | A Few Clouds

Weather: Miss Marilyn

Weather

Miss Marilyn

By Gerard Roe
Staff Meteorologist

First things first. Logan Airport recorded almost three inches of rain Sunday, the largest one-day total since January. Despite the deluge, we are still one-third short of our customary 30 inches at this time of year. Now the problem. The overwhelming factor in the weather over the next few days is the progress of Hurricane Marilyn in the western North Atlantic. As of Monday night, she is situated about 400 miles (640 kilometers)southwest of Bermuda moving almost due north at 14 mph (22 kph)and packing sustained winds of 100 mph (160 kph). Marilyn is smaller in extent and magnitude than last week's Luis, but the destruction on St. Thomas is a sobering testimonial to her power.

There are two competing factors determining her fate. At the surface, slipping off into the ocean to the northeast, is an anticylone. This generates low-level winds from the east ahead of Marilyn, nudging her closer to the coast. At upper levels some strong ripples ahead of a large trough now digging into the central plains will try to push the Hurricane out to sea. The best bet currently is that the upper levels will win out, keeping Marilyn east of the 70W meridian.

In any event, the approach of Marilyn from the south will squeeze the isobars, bringing strong winds from the ocean, possibly gale force off the Cape. Accompanying clouds and rain are likely in Boston on Wednesday.

The ultimate fate of Marilyn is to get swept off to the northeast as a huge region of polar air pushes down over the country. Associated with this intrusion, the first snows of the season are possible in the Rockies.

Today: Mostly sunny. Moderate winds from the north or northeast at 15-20 mph (24-32 kph). Becoming cloudy early evening. High 65F (18C).

Tonight: Cloudy with a fair chance of rain toward morning. Low 55F (13C).

Wednesday: Gusting winds from the northeast. Rain likely, possibly heavy in eastern areas. High 61F (16C). Low 53F (12C).

Thursday: Rain possible. High in the upper 60s (18-20C). Low in the lower 50s (10-12C).