Tropical Depression 16 was officially named this morning, Sept. 28 at 11 a.m. EDT by NOAA's National Hurricane Center in Miami, Fla. Many watches and warnings have also already been posted this morning.
GOES-13 captured this visible image of Tropical Depression 16 on Sept. 28 at 1425 UTC (10:25 a.m. EDT) as it strengthening into a depression (bottom center) in the western Caribbean. The large area of clouds that stretch along the US east coast are associated with an elongated area of low pressure (a trough). Credit: NOAA/NASA GOES Project
In the U.S., Florida is under a Tropical Storm Warning and Watch. A Tropical Storm Warning has been issued for the Florida coast from Jupiter Inlet southward to East Cape Sable, and for all of the Florida Keys, including Florida Bay and the Dry Tortugas. A Tropical Storm Watch has been issued for the west coast of Florida from north of east Cape Sable to Chokoloskee and for the east coast of Florida from north of Jupiter Inlet to Sebastian Inlet.
The Atmospheric Infrared Sounder instrument, known as 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 strengthening or weakening. When cloud top temperatures get colder it means that they're getting higher into the atmosphere which means the "uplift" of warm, moist air is stronger and it will form stronger thunderstorms (that power a tropical cyclone). When cloud-top temperatures warm up it means that the cloud tops are lower than they were before, indicating that the storm is weakening.
When the Aqua satellite passed over Tropical Depression 16 (TD16) from space on Sept. 28 at 0635 UTC (2:35 a.m. EDT) the AIRS instrument took the temperature of the cloud tops in the storm and found them to be as cold as or colder than -63 Fahrenheit throughout a very large area within TD16, indicating the storm had a good amount of energy to power it up. The area of strong thunderstorms in the AIRS images is quite large, and TD16 is already raining on western Cuba.
The Geostationary Operational Environmental Satellite known as GOES-13 flew over Tropical Depression 16 on Sept. 28 at 1425 UTC (10:25 a.m. EDT) as it strengthening into a depression. GOES-13's visible imagery showed a large extent of cloud cover, spanning over Cuba and Jamaica, the Cayman Islands and northeastward into south Florida.
The National Hurricane Center (NHC) in Miami, Fla. noted this morning, Sept. 28 at 8 a.m. EDT that TD16 is going to bring some heavy rains and squally conditions in the Caribbean. NHC said, "Heavy rains and strong gusty winds to tropical storm force are expected to affect the Cayman Islands, Jamaica and Cuba today. These weather conditions are likely to spread over the Florida Keys, southern Florida and the northwestern Bahamas later today and Wednesday."
During the morning hours of Sept. 28, the strongest winds were happening about a couple of hundred miles east and south of the Isle of Youth, Cuba and Grand Cayman. If TD16 strengthens into a tropical storm, it would be named Nicole.
South-southwesterly vertical wind shear associated with a large upper-level trough moving into the southeastern U.S. is expected to limit the storm's intensification, although it is near tropical storm-force this morning. The projected track of the TD16 takes it in a north-northeasterly direction across Cuba toward southeastern Florida.
Meanwhile, there's another female named storm that's still making waves in the Atlantic Ocean basin, Julia. However, Julia is just a remnant low pressure area and is about 150 miles south-southeast of Bermuda. This remnant low is moving west-northwest near 15 mph and is not in a good environment for redevelopment. The NHC gives Julia's remnants a meager ten percent chance of redeveloping in the next 48 hours, so TD16 is the one to watch.
Rob Gutro | EurekAlert!
Further reports about: > AIRS > Aqua satellite > Bahama > Cape Verde Islands > Cayman > Cuba > Depression > Grand Challenge > Hurricane > Island > Keys > NASA > National Hurricane Center > TD16 > Tropical Depression > UTC > cloud tops > sea surface temperature > tropical Caribbean > tropical diseases > tropical storm
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