NOAA’s P-3 Hurricane Hunters concluded their Environmental Modeling Center (EMC) tasked reconnaissance into Hurricane Isaias with real-time support from AOML’s Hurricane Research Division. The aircraft took off Monday, August 3 at 5 AM EDT, from Lakeland, Florida.
Después de enfrentar dificultades para localizar el centro de Isaias, los científicos del AOML se coordinaron con el navegador de a bordo del vuelo para reajustar la trayectoria del avión para una adecuada vigilancia de la circulación. Una vez reposicionado, el viento aerotransportado y la cobertura de medidas termodinámicas verificaron un vórtice altamente inclinado y desorganizado.
La naturaleza difusa y alargada del campo de precipitaciones de la tormenta indica que sus características continuaron fluctuando mientras luchaba con las condiciones desfavorables impuestas a la circulación por una depresión que se aproximaba. La presentación por satélite y por radar costero de la estructura de las nubes y las precipitaciones de Isaías indicó intentos periódicos de reorganización de la tormenta, en consonancia con las observaciones de la NOAA P-3.
Regaining Hurricane status today, Isaias maintained its intensity due to warm ocean waters despite its interaction with the imposing shortwave trough to its west. The National Hurricane Center (NHC) has issued tropical cyclone hazard watches and warnings along the eastern U.S., extending from Georgia through the mid-Atlantic seaboard, to Maine.
NHC forecasted some intensification as Isaias repositioned itself in the flow of its environment over the last few hours. The new meteorological configuration reoriented the changing of wind with height, known as vertical wind shear, to align with the motion of Hurricane Isaias. This relaxed the effect of hostile conditions on the circulation, and allowed the system to intensify before its eventual landfall in southern North Carolina.
Hurricane Isaias is expected to impact the entire east coast of the U.S., bringing heavy rainfall, strong winds, and storm surge to the region as it accelerates up the I-95 Corridor. The National Weather Service offices have issued local advisories, which have resulted in road closures.
While landfalling tropical cyclones typically dissipate, Hurricane Isaias’ circulation is expected to enhance due to strong upper-level winds. This may result in sustained tropical cyclone conditions while Isaias continues its trajectory towards the northeast US, weakening slowly as it tracks up the coast.
>> Scientist K. Ryan
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