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1997 PRELIMINARY
REPORTS |
a. Synoptic HistoryAna formed as a tropical depression from a frontal low pressure
system just off the coast of South Carolina on 30 June. It moved slowly
eastward and became a tropical storm with 46-mph sustained winds on the
next day even as vertical wind shear limited convective development near
the center of the low-level circulation. A deepening short-wave trough
moved to eastern North America and accelerated the storm toward the northeast
on the 2nd and 3rd. On 4 June, Ana became extra-tropical while moving
over colder water and then dissipated. Ana did not affect land. b. Meteorological StatisticsA USAF Reserve reconnaissance aircraft flew into Ana on the
afternoon of 1 July and measured a 62-mph wind speed in the northeast
quadrant at 1500 feet and a minimum surface pressure of 1000 millibars.
These values are the basis for the maximum 1-minute surface wind speed
of 46 mph and the minimum sea level. c. Casualty and Damage StatisticsThere were none.
Maximum
Intensity For Tropical Storm Ana
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