When NASA's Tropical Rainfall Measuring Mission (TRMM) satellite flew over the developing TD18 early on Oct. 22 at 0040 UTC (Oct. 21 at 8:40 p.m. EDT), the satellite measured rainfall rates within the low pressure area and measured cloud heights of the thunderstorms that make up the low.
NASA's TRMM satellite flew over the developing tropical depression 18 on Oct. 21 at 8:40 p.m. EDT and noticed a hot towering thunderstorm over 9.3 miles (15 kilometers) high and an area of heavy rainfall (red).
Credit: NASA/SSAI, Hal Pierce
TRMM noticed that the developing depression had a "hot towering" thunderstorm over 9.3 miles (15 kilometers) high. That same area also revealed heavy rainfall where rain was falling at 2 inches/50 mm per hour.
Hot Towers are towering clouds that emit a tremendous amount of latent heat (that's why they're called "hot" towers). NASA research indicates that whenever a hot tower is spotted, a tropical cyclone will likely intensify within 6 or more hours, and the low pressure system intensified into a tropical depression.
Satellite data also showed that the depression also has a closed surface circulation and the banding of thunderstorms around the center has increased during the early morning hours on Oct. 22. These are all signs that the depression is getting more organized.
At 11 a.m. EDT, TD18 had maximum sustained winds near 30 mph (45 kph). It was located near 13.5 North latitude and 78.0 West longitude, about 320 miles (515 km) south-southwest of Kingston, Jamaica. TD18 was moving to the southwest at 5 mph 7 kph) and had a minimum central pressure of 1003 millibars.
The National Hurricane Center (NHC) noted that a tropical storm warning could be needed later in the day on Monday, Oct. 22 for Jamaica. Also, interests in eastern Cuba, Hispaniola, and the Bahamas should monitor the progress of this system. According to NHC, the depression is expected to drift westward and the turn to the north-northeast on Oct. 23 and 24. The forecast track takes TD18's center near Jamaica during the night-time hours on Oct. 23.
Tropical Depression 18 was born from the low pressure area formerly known as System 99L. The NHC expects TD18 to strengthen and become a tropical storm later on Oct. 22 or on Oct. 23. Once the depression becomes a tropical storm it would be renamed "Tropical Storm Sandy."
In addition to the new tropical depression, there's another area that forecasters are watching in the Atlantic. System 90L is producing showers and thunderstorms in the central Atlantic about 700 miles east-northeast of the Leeward Islands. During the morning hours of Oct. 22, the showers had become a little better organized, and the NHC gives the low a 50 percent chance of becoming the nineteenth tropical depression of the Atlantic hurricane season.Text credit: Rob Gutro
Rob Gutro | EurekAlert!
Environmental damage from fog reduction is observable from outer space, find hydrologists
05.06.2020 | Indiana University
Upwards with the “bubble shuttle”: How sea floor microbes get involved with methane reduction in the water column
27.05.2020 | Leibniz-Institut für Ostseeforschung Warnemünde
Humans rely dominantly on their eyesight. Losing vision means not being able to read, recognize faces or find objects. Macular degeneration is one of the major...
In meningococci, the RNA-binding protein ProQ plays a major role. Together with RNA molecules, it regulates processes that are important for pathogenic properties of the bacteria.
Meningococci are bacteria that can cause life-threatening meningitis and sepsis. These pathogens use a small protein with a large impact: The RNA-binding...
An analysis of more than 200,000 spiral galaxies has revealed unexpected links between spin directions of galaxies, and the structure formed by these links...
Two prominent X-ray emission lines of highly charged iron have puzzled astrophysicists for decades: their measured and calculated brightness ratios always disagree. This hinders good determinations of plasma temperatures and densities. New, careful high-precision measurements, together with top-level calculations now exclude all hitherto proposed explanations for this discrepancy, and thus deepen the problem.
Hot astrophysical plasmas fill the intergalactic space, and brightly shine in stellar coronae, active galactic nuclei, and supernova remnants. They contain...
In living cells, enzymes drive biochemical metabolic processes enabling reactions to take place efficiently. It is this very ability which allows them to be used as catalysts in biotechnology, for example to create chemical products such as pharmaceutics. Researchers now identified an enzyme that, when illuminated with blue light, becomes catalytically active and initiates a reaction that was previously unknown in enzymatics. The study was published in "Nature Communications".
Enzymes: they are the central drivers for biochemical metabolic processes in every living cell, enabling reactions to take place efficiently. It is this very...
19.05.2020 | Event News
07.04.2020 | Event News
06.04.2020 | Event News
05.06.2020 | Life Sciences
05.06.2020 | Physics and Astronomy
05.06.2020 | Life Sciences