Nav: Home

NASA gets infrared view of new Tropical Storm 20W

September 15, 2015

The twentieth tropical depression of the Northwestern Pacific Ocean formed early on September 14 and became a tropical storm the next day, triggering a tropical storm watch. NASA's Aqua satellite passed over the low pressure area as it was consolidating and saw powerful thunderstorms circling the center.

The Atmospheric Infrared Sounder or AIRS instrument that flies aboard NASA's Aqua satellite gathers data in infrared light that provides information about temperatures. The colder the cloud top temperature, the higher the storms are in the troposphere (because the higher you go in the troposphere, the colder it gets). When storms get very high, cloud top temperatures get as cold or colder than -63 Fahrenheit/-53 Celsius, which is what AIRS data showed around Tropical Depression 20W's (TD 20W) center on September 14 at 1611 UTC (2:11 p.m. EDT). Storms with cloud top temperatures that high have been shown to produce heavy rainfall.

By September 14 at 2100 UTC (7 p.m. EDT), TD 20W had formed about 373 nautical miles (429 miles/690 km) east-northeast of Saipan.

At 0900 UTC (5 a.m. EDT) on September 15, TD 20W was located about 418 nautical miles (481 miles/774 km) northeast of Andersen Air Force Base, Guam. That put its center near 18.0 North latitude and 150.6 East longitude. TD 20W had maximum sustained winds near 30 knots (35 mph/55 kph) and was moving to the west-northwest at 9 knots (10.3 mph/16.6 kph).

At 1200 UTC (7 a.m. EDT) on September 15, the depression had strengthened into a tropical storm. Maximum sustained winds have increased to 40 mph.The center of Tropical Storm 20W was located by satellite near latitude 18.3 north and longitude 149.7 East. That put the center about 265 miles east of Agrihan, 255 miles east of Pagan and Alamagan and 470 miles northeast of Guam. A tropical storm watch was in effect for Alamagan, Pagan and Agrihan.

Tropical Storm 20W was moving west-northwest at 10 mph and is expected to continue in that general direction for the next day or two before turning north.

Is expected to continue intensifying during the next couple of days.

On Sept. 15 at 0358 UTC (Sept. 14 at 11:58 p.m. EDT) a microwave image from the NOAA-19 satellite showed that the bulk of the deep convection (rising air that forms thunderstorms) was over the northwestern quadrant (indicating wind shear was pushing it) with curved bands of thunderstorms wrapping into the center.

For forecast updates from the National Weather Service Office in Guam, visit:

The Joint Typhoon Warning Center (JTWC) forecast takes 20W toward the Northern Marianas Islands and later toward Iwo To island, Japan. JTWC forecasters expect TD 20W to strengthen, peaking near 105 knots (120.8 mph/194.5 kph) by September 19.

NASA/Goddard Space Flight Center

Related Depression Articles:

A biological mechanism for depression
Researchers report that in depressed individuals there are increased amounts of an unmodified structural protein, called tubulin, in lipid rafts compared with non-depressed individuals.
Depression in adults who are overweight or obese
In an analysis of primary care records of 519,513 UK adults who were overweight or obese between 2000-2016 and followed up until 2019, the incidence of new cases of depression was 92 per 10,000 people per year.
Why stress doesn't always cause depression
Rats susceptible to anhedonia, a core symptom of depression, possess more serotonin neurons after being exposed to chronic stress, but the effect can be reversed through amygdala activation, according to new research in JNeurosci.
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.
More Depression News and Depression Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Listen Again: Reinvention
Change is hard, but it's also an opportunity to discover and reimagine what you thought you knew. From our economy, to music, to even ourselves–this hour TED speakers explore the power of reinvention. Guests include OK Go lead singer Damian Kulash Jr., former college gymnastics coach Valorie Kondos Field, Stockton Mayor Michael Tubbs, and entrepreneur Nick Hanauer.
Now Playing: Science for the People

#562 Superbug to Bedside
By now we're all good and scared about antibiotic resistance, one of the many things coming to get us all. But there's good news, sort of. News antibiotics are coming out! How do they get tested? What does that kind of a trial look like and how does it happen? Host Bethany Brookeshire talks with Matt McCarthy, author of "Superbugs: The Race to Stop an Epidemic", about the ins and outs of testing a new antibiotic in the hospital.
Now Playing: Radiolab

Dispatch 6: Strange Times
Covid has disrupted the most basic routines of our days and nights. But in the middle of a conversation about how to fight the virus, we find a place impervious to the stalled plans and frenetic demands of the outside world. It's a very different kind of front line, where urgent work means moving slow, and time is marked out in tiny pre-planned steps. Then, on a walk through the woods, we consider how the tempo of our lives affects our minds and discover how the beats of biology shape our bodies. This episode was produced with help from Molly Webster and Tracie Hunte. Support Radiolab today at