Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Satellite data shows Tropical Cyclone Halola getting stronger


Tropical Depression Halola is getting stronger. NASA data pinpointed the area of strongest sustained winds on July 19 and the extent of those winds expanded on July 20 as Halola became a tropical storm again. NASA also gathered infrared data that showed cloud top temperatures getting colder, indicating more uplift or strength in the storm.

On July 19 at 2 p.m. GMT (10 a.m. EDT), the RapidScat instrument aboard the International Space Station gathered data on surface winds in Tropical Depression Halola. RapidScat saw the strongest sustained winds were on the northeastern side as strong as 22 meters per second (49.2 mph/79.2 kph). Winds around the rest of the storm were less strong.

On July 19, RapidScat saw Halola's strongest sustained winds northeast of the center at 22 meters per second (49.2 mph/79.2 kph). Winds around the rest of the storm were less strong.

Credits: NASA JPL, Doug Tyler

The area of strongest winds appeared to expand on July 20 at 1152 UTC (7:52 a.m. EDT) when the ASCAT-A (Advanced Scatterometer) instrument that flies aboard Europe's EUMETSAT METOP satellite gathered wind data. ASCAT-A showed that Halola's winds were still not symmetrical, but the strongest winds were now along the northern and southeastern edges of the storm.

ASCAT uses radar to measure the electromagnetic backscatter from the wind-roughened ocean surface, from which data on wind speed and direction can be derived. These products are processed by NOAA/NESDIS utilizing measurements from ASCAT.

The Atmospheric Infrared Sounder (AIRS) instrument that flies aboard NASA's Aqua satellite captured infrared data on Halola. AIRS data showed cloud top temperatures were again as cold as -63F/-53C north and east of Tropical Storm Halola's center on July 20 at 3:05 UTC, indicating that there was stronger uplift of air in the storm which can push thunderstorm cloud tops higher in the atmosphere.

NASA research has determined that cloud tops with temperatures near -63 Fahrenheit or -53 Celsius have the ability to generate heavy rainfall (that's over 1 inch or 25 millimeters per hour). When cloud top temperatures are colder than that, the thunderstorms are likely to reach higher in the atmosphere and are likely to be stronger.

Tropical Depression Halola has once again become a tropical storm. At 1500 UTC (11 a.m. EDT), Halola's maximum sustained winds had increased to 50 knots (57.5 mph/92.6 kph). It was centered near 22.0 North latitude and 145.8 East longitude, about 334 nautical miles (384.4 miles/ 618.6 kph) east-southeast of Iwo To island, Japan. Halola has tracked west-northwestward at 12 knots (13.8 mph/22.2 kph).

The Joint Typhoon Warning Center noted that "animated enhanced infrared satellite imagery depicts tight curved banding [of thunderstorms] wrapping around the northern [quadrant] of the cyclone into a well-consolidated low level circulation center." Microwave data from the METOP-B satellite image showed that an eye was developing.

The Joint Typhoon Warning Center (JTWC) noted that vertical wind shear is easing, and Halola is forecast to move through warm sea surface temperatures allowing for it to strengthen. JTWC calls for Halola to reach typhoon status on Tuesday, July 21 and continue strengthening to 80 knots (92.0 mph/148.2 kph) before weakening on July 24.


For more information about how NASA uses infrared light in tropical cyclone research, visit:

Rob Gutro | EurekAlert!

More articles from Earth Sciences:

nachricht New technologies and computing power to help strengthen population data
22.03.2018 | University of Southampton

nachricht New interactive map shows climate change everywhere in world
22.03.2018 | University of Cincinnati

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Space observation with radar to secure Germany's space infrastructure

Satellites in near-Earth orbit are at risk due to the steady increase in space debris. But their mission in the areas of telecommunications, navigation or weather forecasts is essential for society. Fraunhofer FHR therefore develops radar-based systems which allow the detection, tracking and cataloging of even the smallest particles of debris. Satellite operators who have access to our data are in a better position to plan evasive maneuvers and prevent destructive collisions. From April, 25-29 2018, Fraunhofer FHR and its partners will exhibit the complementary radar systems TIRA and GESTRA as well as the latest radar techniques for space observation across three stands at the ILA Berlin.

The "traffic situation" in space is very tense: the Earth is currently being orbited not only by countless satellites but also by a large volume of space...

Im Focus: Researchers Discover New Anti-Cancer Protein

An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.

The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

New solar solutions for sustainable buildings and cities

23.03.2018 | Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

Latest News

Don't Give the Slightest Chance to Toxic Elements in Medicinal Products

23.03.2018 | Life Sciences

Sensitive grip

23.03.2018 | Materials Sciences

No compromises: Combining the benefits of 3D printing and casting

23.03.2018 | Process Engineering

Science & Research
Overview of more VideoLinks >>>