Oct 31, 2010

Tropical Storm Shary and Midwest Storm

On October 28th, at 9PM, (3Z, 29th) this area of convection just south of Bermuda was named Tropical Storm Shary.
It was in a strongly sheared environment on the northeast edge of a large closed upper low. Upper level winds were strong enough to push clouds to the Bahamas:
The large tropical wave which later became Tomas can be seen east of the Lesser Antilles and Venezuela. GFS analysis shows that the area in which Shary is located had 250 mb wind speeds in the 30-40 knot range:
The surface low is well southeast of the convection, and the strongest winds are due to a tight pressure gradient with the subtropical ridge to the north:
The 955.2 mb Midwest storm from October 26th was not the record for the lowest pressure in a non-tropical storm in the Continental U.S. A reading of 955.0 was confirmed at Block Island, RI on March 7th, 1932 and at Canton, NY on January 3rd, 1913. The October 26th storm is still the record for any Midwest storm.

A storm near the Aleutians bottomed out at 939 mb last night:
Buoy 46205 west of British Columbia just (as of 0Z) reported 48.6 knot winds with gusts to 64.1, and 34.1 foot waves.

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