Nav: Home

NASA sees Debby transitioned into a tropical storm

August 08, 2018

NASA's Aqua satellite passed over the Central Atlantic Ocean and looked at cloud top temperatures in Debby, revealing the storm had transitioned from subtropical to tropical.

Subtropical Storm Debby Advisory Number 1 was issued on Aug. 7 by the National Hurricane Center, Miami, Fla. Debby formed far from land areas in the Central North Atlantic Ocean.

On Aug. 8 at 1:05 a.m. EDT (0605 UTC), the Moderate Resolution Imaging Spectroradiometer or MODIS instrument aboard NASA's Aqua satellite captured an infrared image of Debby. The image showed three areas of strongest thunderstorms. They were around the center of circulation, southeastern, southwestern quadrants and in a band of thunderstorms south of the center. MODIS infrared data showed that some of those storms had cloud top temperatures as cold as minus 50 degrees Fahrenheit (minus 45.5 degrees Celsius), indicating they are high in the troposphere. Cloud tops continued to warm indicating stronger uplift in the storm, and the transition into a tropical cyclone.

The National Hurricane Center (NHC) said of the transition, "Over the past several hours, deep convection with cloud tops of minus 55 to minus 60 degrees Celsius has developed in the southeastern semicircle, with some of the convective tops covering the previously exposed low-level circulation center. In addition, outer banding features have dissipated, and an elongated upper-level anticyclone has developed over the cyclone. These convective- and synoptic-scale features indicate that Debby has made the transition from a subtropical to a tropical cyclone."

NHC reported at 5 a.m. EDT (900 UTC) on Aug. 8, the center of Tropical Storm Debby was located near latitude 40.8 degrees north and longitude 48.8 degrees west. That's 1,175 miles (1,890 km) west-northwest of the Azores Islands. Debby is moving toward the north-northeast near 9 mph (15 kph), and this general motion is forecast to continue this morning. A turn toward the northeast is forecast by this afternoon, and that motion should continue into Thursday, Aug. 9.

Maximum sustained winds have increased to near 45 mph (75 kph) with higher gusts. Little change is strength is forecast today, with slow weakening expected to begin late tonight or on Thursday.

Debby is forecast to dissipate over the far northern Atlantic by Thursday night, Aug. 9.

For updated forecasts on Debby, visit:

NASA/Goddard Space Flight Center

Related Circulation Articles:

Villous tree model with active contractions for estimating blood flow conditions
Perfusion in the human placenta is an important physiological phenomenon which shows the placental conditions.
Autumn Eurasian snow variability in response to atmospheric circulation
investigate the autumn Eurasian snow variability, intending to provide a better understanding of the factors involved in Eurasian snow changes and their impacts on the wintertime Arctic Oscillation.
Weather patterns' influence on frost timing
The frost-free season in North America is approximately 10 days longer now than it was a century ago.
Mechanism of the influence of the Tibetan-Iranian Plateaus on the circulation and climate in summer
The Iranian-Tibetan Plateaus have both dynamic and thermal influences on Asian climate and global circulation.
NASA watching remnants of ex-Tropical Cyclone Carlos
Tropical Cyclone Carlos became sub-tropical and weakened to a remnant low pressure area over the weekend of Feb.
More Circulation News and Circulation Current Events

Best Science Podcasts 2019

We have hand picked the best science podcasts for 2019. Sit back and enjoy new science podcasts updated daily from your favorite science news services and scientists.
Now Playing: TED Radio Hour

Teaching For Better Humans
More than test scores or good grades — what do kids need to prepare them for the future? This hour, guest host Manoush Zomorodi and TED speakers explore how to help children grow into better humans, in and out of the classroom. Guests include educators Olympia Della Flora and Liz Kleinrock, psychologist Thomas Curran, and writer Jacqueline Woodson.
Now Playing: Science for the People

#535 Superior
Apologies for the delay getting this week's episode out! A technical glitch slowed us down, but all is once again well. This week, we look at the often troubling intertwining of science and race: its long history, its ability to persist even during periods of disrepute, and the current forms it takes as it resurfaces, leveraging the internet and nationalism to buoy itself. We speak with Angela Saini, independent journalist and author of the new book "Superior: The Return of Race Science", about where race science went and how it's coming back.