Nav: Home

NASA sees the formation of early Atlantic Ocean Tropical Depression 1

April 20, 2017

A low pressure area in the Atlantic Ocean, located southwest of the Azores was designated as Subtropical Depression One on April 19 as NASA examined its rainfall. By April 20 it had become the Atlantic's first tropical depression.

Just as the subtropical depression was forming in the North Atlantic Ocean on April 19 at 11 a.m. EDT (1500 UTC) the Global Precipitation Measurement Mission or GPM core observatory satellite flew directly over it and identified areas where rainfall was heaviest in the system.

Data collected by GPM's Microwave Imager (GMI) and Dual-Frequency Precipitation Radar (DPR) instruments April 19, 2017 at 0746 UTC (3:46 a.m. EDT) showed moderate to heavy rainfall within the low pressure area. DPR revealed that rain was falling at a rate of over 30 mm (1.2 inches) per hour in showers located to the east of the low's center of circulation. GPM's radar (DPR Ku Band) also showed that a few storms rotating around the low pressure center were dropping rain at a rate of almost 36 mm (1.4 inches) per hour.

At NASA's Goddard Space Flight Center in Greenbelt, Maryland, a 3-D examination was created using GPM's Radar (DPR Ku Band) data. That 3-D analysis showed most of the storms around the low pressure area were fairly shallow. Some of the highest storm tops just to the west of the low's center of circulation were found by DPR to reach altitudes above 11 km (6.8 miles). GPM is a joint satellite mission between NASA and the Japan Aerospace Exploration Agency, JAXA.

At the time of formation, the National Hurricane Center (NHC) determined that it was a sub-tropical low pressure area. The difference between this and a tropical cyclone is found in the temperature structure. This low had a cold core while tropical cyclones that normally form in the tropics, are warm core. That changed on April 20 at 11 a.m. EST when it was designated a tropical depression and developed a warm core. At that time NHC's discussion noted "Conventional satellite imagery indicate that the convection, although not very deep, has become more symmetric around the center, suggesting that the subtropical cyclone has transitioned into a tropical depression."

At 11 a.m. EST (1500 UTC), the center of Tropical Depression One was located near 36.1 degrees north latitude and 40.0 degrees west longitude. That's about 730 miles (1,170 km west of the Azores. The Azores are an archipelago in the mid-Atlantic Ocean. The depression was moving toward the northwest near 14 mph (22 kph), and that general motion is expected to continue until dissipation. Maximum sustained winds were near 35 mph (55 kph) with higher gusts. The estimated minimum central pressure is 996 millibars (29.42 inches).

The National Hurricane Center (NHC) predicts that this system will become a remnant low pressure area later today, April 20 and become absorbed by a larger low at night or early Friday, April 21. The depression is then expected to be absorbed by a larger low pressure area.
-end-
Rob Gutro / Hal Pierce
NASA's Goddard Space Flight Center

NASA/Goddard Space Flight Center

Related Depression Articles:

Which comes first: Smartphone dependency or depression?
New research suggests a person's reliance on his or her smartphone predicts greater loneliness and depressive symptoms, as opposed to the other way around.
Depression breakthrough
Major depressive disorder -- referred to colloquially as the 'black dog' -- has been identified as a genetic cause for 20 distinct diseases, providing vital information to help detect and manage high rates of physical illnesses in people diagnosed with depression.
CPAP provides relief from depression
Researchers have found that continuous positive airway pressure (CPAP) treatment of obstructive sleep apnea (OSA) can improve depression symptoms in patients suffering from cardiovascular diseases.
Post-natal depression in dads linked to depression in their teenage daughters
Fathers as well as mothers can experience post-natal depression -- and it is linked to emotional problems for their teenage daughters, new research has found.
Being overweight likely to cause depression, even without health complications
A largescale genomic analysis has found the strongest evidence yet that being overweight causes depression, even in the absence of other health problems.
Don't let depression keep you from exercising
Exercise may be just as crucial to a depression patient's good health as finding an effective antidepressant.
Having an abortion does not lead to depression
Having an abortion does not increase a woman's risk for depression, according to a new University of Maryland School of Public Health-led study of nearly 400,000 women.
Mother's depression might do the same to her child's IQ
Roughly one in 10 women in the United States will experience depression, according to the Centers for Disease Control and Prevention.
Teenage depression linked to father's depression
Adolescents whose fathers have depressive symptoms are more likely to experience symptoms of depression themselves, finds a new Lancet Psychiatry study led by UCL researchers.
Anxiety and depression linked to migraines
In a study of 588 patients who attended an outpatient headache clinic, more frequent migraines were experienced by participants with symptoms of anxiety and depression.
More Depression News and Depression Current Events

Top Science Podcasts

We have hand picked the top science podcasts of 2019.
Now Playing: TED Radio Hour

In & Out Of Love
We think of love as a mysterious, unknowable force. Something that happens to us. But what if we could control it? This hour, TED speakers on whether we can decide to fall in — and out of — love. Guests include writer Mandy Len Catron, biological anthropologist Helen Fisher, musician Dessa, One Love CEO Katie Hood, and psychologist Guy Winch.
Now Playing: Science for the People

#542 Climate Doomsday
Have you heard? Climate change. We did it. And it's bad. It's going to be worse. We are already suffering the effects of it in many ways. How should we TALK about the dangers we are facing, though? Should we get people good and scared? Or give them hope? Or both? Host Bethany Brookshire talks with David Wallace-Wells and Sheril Kirschenbaum to find out. This episode is hosted by Bethany Brookshire, science writer from Science News. Related links: Why Climate Disasters Might Not Boost Public Engagement on Climate Change on The New York Times by Andrew Revkin The other kind...
Now Playing: Radiolab

An Announcement from Radiolab