25th anniversary of first tropical cyclone track forecast from NOAA’s Global Model

At 00 UTC, a new implementation of NOAA’s global spectral model, then called the Aviation Model, produced a track forecast for Tropical Storm Andrew in the Atlantic.  Earlier in the year, the model was upgraded so that it now had a resolution of about 210 km, and it had 18 levels in the vertical.  Compare […]

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5th Anniversary of Hurricane Ernesto

On August 8, 2012, Hurricane Ernesto struck the Mexican state of Quintana Roo on the Yucatan peninsula.  As a Category-One hurricane, it dumped copious rain across the Yucatan and southern Mexico.  Its remnants reformed in the eastern Pacific as a tropical storm. Ernesto formed from an African easterly wave, which moved off the African coast […]

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20th anniversary of the first ever dropwindsonde observation in a hurricane eyewall

For decades, meteorologists used dropwindsondes, weather instrument packages deployed from aircraft, to make atmospheric soundings below flight level.  Starting in the 1970s they used Omega dropwindsondes (ODWs) that employed the very low-frequency Omega navigation signals to estimate the ODW’s motion relative to the aircraft, and subsequently calculate the wind.  Because of the limitations of this system, […]

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35th Anniversary of Super Typhoon Bess

On August 1, 1982, Tropical Storm Bess struck Japan’s main island of Honshu.  Although days before Bess had been classified a Super Typhoon with maximum sustained winds of 145 mph (230 km/hr), the storm weakened considerably prior to landfall.  Despite this, Bess brought torrential rains across the most populated provinces of Japan.  A peak 24-h […]

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50th Anniversary of TAFB

In July of 1967, as part of a reorganization of the National Hurricane Center (NHC), the Tropical Analysis Center, predecessor of the Tropical Analysis and Forecast Branch (TAFB), was formed.  This reorganization, overseen by Dr. Bob Simpson who was scheduled to become NHC director the next year, also separated NHC from the Miami Weather Bureau […]

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15th Anniversary of Category Five Hurricanes Elida, Hernan, and Kenna

On July 25, 2002, Hurricane Elida in the eastern Pacific reached Category Five status when its winds reached 155 mph (250 km/hr).  Elida became the first of three east Pacific Category Five hurricanes to form during that busy season.  It was followed by Hurricane Hernan (which became a Cat 5 on sept. 1st) and then […]

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5th anniversary of Typhoon Vicente

Typhoon Vicente made landfall in Southern China late on 23 July, 2012, as a category-4 typhoon, the strongest to hit southern China in recent years.  Six days earlier, an area of cloudiness east of the northern Philippines started to slowly organize.  As it passed into the South China Sea, it gained enough intensity and organization […]

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170th Anniversary of Barbados hurricane warning system

In July of 1847, William Reid, Royal Governor of Barbados, inaugurated a hurricane warning system on that island.  As a colonel of the Royal Engineers, Reid had been assigned to Barbados to rebuild barracks destroyed by a hurricane in 1831.  Seeing the vast destruction left by the storm spurred an interest in Reid, and he […]

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515th Anniversary of Columbus’ hurricane encounter

On June 30, 1502, during his fourth voyage to the New World, Christopher Columbus and his fleet sought shelter from a hurricane.  While his fleet survived, a Spanish treasure fleet heading for home fared far worse. During his previous voyages to the Caribbean, Columbus had learned of the terrible storms that frequented the area.  The […]

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15th Anniversary of Super Typhoon Chataan

Over the period of June 27-July 2, 2002, a developing tropical system, later to become Super Typhoon Chataan, dumped heavy rains on the Federated States of Micronesia (FSM) causing the deadliest natural disaster in the history of the Chuuk Islands (previously known as the Truk Islands). The disturbance formed from a monsoonal trough that had […]

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