Cloud top temperatures indicate the strength of the storm to forecasters. The colder the cloud top temperatures, the stronger the convection and uplift. When cloud top temperatures drop, as they did in Atmospheric Infrared Sounder (AIRS) imagery captured on Sept. 23 at18:53 UTC (2:53 p.m. EDT) it indicates the storm is gaining strength.
TRMM data from Sept. 24 at 0159 UTC showed moderate to heavy rainfall (red) southwest of Matthew\'s center of circulation. The approximate center of circulation is shown by a red tropical storm symbol. Credit: NASA/SSAI, Hal Pierce
At that time, Matthew's maximum sustained winds were near 40 mph. In the image, the coldest cloud top temperatures (colder than -63 Fahrenheit) appeared around the center of Matthew's circulation already giving the appearance of an eye. The AIRS infrared image on Sept. 24 at 3:05 a.m. EDT showed a concentrated area of strong thunderstorms around Matthew's center as the sustained winds had increased to 50 mph.
AIRS has the ability to determine cloud top and sea surface temperatures from its position in space aboard NASA's Aqua satellite. Cloud top temperatures help forecasters know if a storm is powering up or powering down and Matthew is powering up.
A hurricane watch is in effect for Puerto Cabezas, Nicaragua to Limon, Honduras including the offshore islands. A tropical storm warning is in effect for Puerto Cabezas, Nicaragua to Limon, Honduras including the offshore islands.
A tropical storm warning is in effect for Puerto Cabezas, Nicaragua northward to the border with Honduras including the offshore islands and the coast of Honduras including the offshore islands. A tropical storm watch is in effect for the coast of Belize, while a hurricane watch is in effect for Puerto Cabezas, Nicaragua to Limon, Honduras. Hurricane conditions are possible between 11 p.m. EDT tonight and 11 a.m. EDT Saturday in that watch area.
Tropical storm-force winds are expected to reach the coastal warning areas during the afternoon of Sept. 24, and a storm surge is expected to produce flooding and dangerous surf. Expected rainfall amounts of 6 to 10 inches are forecast with isolated amounts to 15 inches.
According to the National Hurricane Center in Miami, on the forecast track the center of the Matthew is expected to be near the Nicaragua/Honduras border late Friday or early Saturday morning then move over land in northern Honduras on Saturday. Updates on Matthew can be found at the National Hurricane Center's web page: www.nhc.noaa.gov.
Rob Gutro | EurekAlert!
Further reports about: > AIRS > AMERICA > Aqua satellite > Cloud Computing > Cloud top temperatures > EDT > Goddard Space Flight Center > Honduras > Hurricane > NASA > National Hurricane Center > Nicaragua > TRMM satellite > UTC > sea surface temperature > tropical Caribbean > tropical diseases > tropical storm
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