Articles tagged with Radar
Tornadoes spawned severe weather in Florida, Georgia, and the Southeastern US on May 24, 2017, with intense rain showers reaching rates of over 8.5 inches per hour. The GPM satellite's data revealed powerful storms dropping heavy rain over the Gulf of Mexico and reaching heights above 9 miles.
A study analyzing raindrop size distribution data over Tibet and southern China reveals significant microphysical differences in precipitation. The results indicate lower raindrop number concentrations for convective precipitation in Tibet, while larger raindrops show similar characteristics in both regions.
The new radar simulator helps explain how debris scatters and falls through the atmosphere, improving tornado detection and damage estimates. Characterizing debris fields is vital due to flying debris causing most tornado fatalities.
Researchers developed a polarimetric radar time-series simulator to study tornadic debris, improving tornado warning accuracy and damage estimation. The simulator explains the relationship between debris characteristics and tornado dynamics.
Tropical Depression 03W formed on April 24, 2017, with intense convective storms dropping heavy precipitation rates. The GPM satellite revealed tall storm towers with rainfall exceeding 8.5 inches per hour.
NASA identified a subtropical depression in the North Atlantic on April 19, which became the Atlantic's first tropical depression by April 20. Heaviest rainfall rates were found near the low-pressure center, with some storms dropping rain at over 36 mm/hour.
GPM detected intense rainfall in the remnant low pressure area of ex-Tropical Cyclone 11S, with rain rates reaching over 8 inches in some areas. The satellite's radar data showed storm tops reaching heights above 13 km, indicating a strong and dynamic system.
The SnowEx mission aims to determine which combination of sensors works best for collecting global snow-water measurements, critical for understanding and managing freshwater resources. The team will fly multiple airborne sensors over Grand Mesa, Colorado, to evaluate their performance in measuring snowpack properties and SWE.
The Beijing MST Radar detected horizontal wind measurements consistent with those from operational radiosondes, covering a range of 3-25 km. The radar's detection capability was found to be high in the mesosphere-lower thermosphere region, extending up to 120 km during daytime.
Tropical Cyclone Carlos was tracked by NASA as it moved between Madagascar and La Reunion Island in the Southern Indian Ocean, revealing a concentrated storm with heavy rainfall rates up to 120 mm per hour. The storm's maximum sustained winds were near 51.7 mph, with a predicted intensification due to decreasing vertical wind shear.
Researchers aim to overcome traditional antenna limitations with liquid materials, enabling flexible and compact devices. The project will test liquids for stability and frequency transmission across various temperatures.
Scientists have measured mass insect migrations in UK skies, with up to 3.5 trillion insects migrating annually over southern England. The movements are comparable to significant oceanic migrations and provide essential ecological services, including pollination and predation of crop pests.
NASA's Global Precipitation Measurement mission provided detailed images of Tropical Cyclone Vardah's cloud cover and heavy rainfall rates before it made landfall. The storm weakened to a remnant low pressure area over southern India, bringing heavy rainfall warnings for affected regions.
NASA analyzed Hawaii's heavy snowfall using GPM satellite data, finding precipitation rates exceeding 9.3 inches per hour in intense storms. The average freezing level was determined to be around 14,127 feet, with slopes reaching as low as 12,795 feet.
The GPM core satellite gathered data on severe storms that impacted the southeastern US, resulting in at least seven fatalities and significant damage. The storms, which included tornadoes, hail, and heavy downpours, affected several states, including Louisiana, Alabama, and Tennessee.
A Martian ice deposit, Utopia Planitia, contains approximately as much water as Lake Superior, spanning over 2,050 miles in diameter. The deposit is estimated to be around 260-560 feet thick, consisting of 50-85% water ice.
CIMMS and NOAA announce a five-year, $95.3 million collaboration to support Weather Ready Nation and Climate Adaptation and Mitigation initiatives. The university will provide expertise in long-term planning, stormscale meteorological phenomena research, and forecast improvements.
Tropical cyclones have formed frequently in the Western Pacific since July 2016, with 36 named storms emerging in under five months. NASA’s Global Precipitation Measurement mission observed Tropical Depression Ma-on forming on November 10, 2016, with heavy showers and strong convective storms.
Tropical Cyclone Kyant formed in the Bay of Bengal on October 25, 2016, and was analyzed by NASA's GPM core satellite. The satellite detected intense storms with heavy rainfall rates of over 215 mm per hour, and some thunderstorms had unusually high storm tops reaching above 20 km.
Two new studies by UCI and NASA researchers found the fastest rates of glacier retreat ever observed in West Antarctica, shedding light on the interaction between ocean conditions and bedrock beneath glaciers. The studies provide crucial data for predicting future Antarctica ice loss and global sea level rise.
Two studies by UCI and NASA found the fastest rates of glacier retreat in West Antarctica, offering insights into ice melting and its impact on global sea level rise. The researchers used satellite data to measure changes in glacier grounding lines, revealing significant ice loss at the bottom of glaciers.
Heavy rainfall from Hurricane Matthew has been detected by NASA's Global Precipitation Measurement mission, with rates reaching over 6.4 inches per hour in some areas. The storm is expected to cause devastating torrential rainfall as it moves slowly over Haiti.
Typhoon Chaba intensified into a super typhoon, with extremely heavy precipitation and towering storm tops. NASA satellites used GPM data to track its movement and formation, which was influenced by warm sea surface temperatures and low vertical wind shear.
A University of Oklahoma study demonstrates that birds migrate in time with warming temperatures in spring and seasonal changes in the land's surface. The researchers found temperature to be a useful cue for migrants, but disputed the use of vegetation greenness as a cue for migration timing.
The Global Precipitation Measurement mission tracked Hurricane Lester as it continued through the Eastern Pacific Ocean, showing extremely heavy rainfall rates of over 7.1 inches per hour. The satellite also revealed a strong hurricane with maximum sustained winds near 140 mph and estimated minimum central pressure of 948 millibars.
Tropical Depression 9 has intensified in the Gulf of Mexico, with deep convection and intense rainfall observed. The National Hurricane Center forecasts strengthening and a possible storm surge for northern Florida.
Tropical Depression 8 formed off the coast of North Carolina in the Atlantic Ocean, with NASA's Global Precipitation Measurement mission providing detailed analysis. The depression was predicted to strengthen slowly over the next 48 hours, bringing heavy rainfall and isolated maximum amounts of 5 inches to far eastern North Carolina.
Researchers created open-source, web-based visualizations of nocturnal bird migrations using weather radar networks. These new tools depict the timing, direction, and speed of bird movements at scales previously impossible to achieve.
The Global Precipitation Measurement mission captured data on Tropical Depression Kay's remaining rainfall, which was limited to a small area. The storm had been devoid of deep convection and thunderstorms for about 12 hours when it faded from the record.
The Global Precipitation Measurement mission gathered extensive rainfall data on Louisiana storms, finding intense rainfall rates of over 3.9 inches per hour and storm tops reaching 9.9 miles high.
A solar storm in May 1967 jammed radar and radio communications at the height of the Cold War, prompting a potential military conflict. However, thanks to the U.S. Air Force's space weather forecasting efforts, the military action was prevented, and the nation avoided a disastrous nuclear exchange.
Tropical Storm Darby brought heavy rainfall and strong winds to the Hawaiian Islands, with rainfall rates reaching up to 5.4 inches per hour. The Global Precipitation Measurement mission detected intense storms southeast of the Big Island, causing widespread flooding and prompting evacuation warnings.
Tropical Storm Georgette developed in the eastern Pacific Ocean, intensifying into a tropical storm with maximum sustained winds reaching 45 mph. GPM data revealed extremely heavy rain and storm top heights over 14 km, indicating favorable conditions for cyclone formation.
GPM data showed heavy rainfall on Estelle's eastern side, later shifting west of center. Precipitation rates reached over 65 mm/h, with some storms having heights exceeding 11.6 km.
Researchers collected unique data set after 2014 South Napa earthquake, showing afterslip concentrated in loosely packed sediment. This helps address question: Can geology be used as proxy for fault behavior? The findings have significant implications for earthquake hazard models and planning response.
A powerful tropical depression was weakening over the Arabian Sea, with maximum sustained winds near 30 knots. Heavy rainfall rates of over 8.2 inches per hour were recorded southwest of the storm's center, indicating a severe weather system.
Tropical Storm Danielle formed on June 20 and dissipated over eastern Mexico by June 21. NASA analyzed its rainfall rates and cloud top temperatures using the GPM mission core satellite and Aqua satellite.
Two giant sinkholes near Wink, Texas, are experiencing subsidence and expansion, suggesting an increased risk of collapse. Groundwater levels and dissolving minerals underlie the area's unstable ground, which is linked to changing groundwater levels and successive roof failures in underlying cavities.
Tropical Depression Bonnie experienced heavy rainfall from organized thunderstorms, measuring up to 4.9 inches per hour. The system weakened due to increased vertical shear and colder sea surface temperatures.
Tropical Cyclone Fantala reached Category Five intensity with maximum sustained winds of 150 knots (173 mph), making it one of the strongest storms in the South Indian Ocean. NASA satellites tracked the storm's intense rainfall and powerful thunderstorms, providing critical data on its size and wind patterns.
The GPM core observatory satellite measured heavy rainfall rates of over 3.6 inches per hour in a powerful storm east of Chattanooga, Tennessee. The satellite also revealed the three-dimensional structure of precipitation in storms beneath it, showing storm tops reaching heights above 7.4 miles.
Tropical Cyclone Emeraude intensified rapidly after forming on March 15, 2016, with GPM's radar measuring extreme rainfall rates of over 8.2 inches per hour. The storm peaked at 125 knots and then weakened, but is expected to re-intensify as it curves toward the southwest.
Tropical Cyclone Emeraude formed on March 15, 2016, in the South Indian Ocean, with intense rainfall rates exceeding 220 mm/h. GPM data revealed a 3D structure of precipitation, indicating storm tops heights above 15 km.
Heavy rainfall and strong storms affected the southern U.S. on March 9, with over a foot of rain falling in Texas to Arkansas. The GPM satellite measured extreme precipitation rates, including 148 mm in one powerful storm.
Researchers investigated wind patterns and affecting weather systems around the shipwreck location. The study revealed strong winds of at least 31 m s-1, and a bow echo embedded in a squall line contributed to the disaster.
Researchers have developed a new flexible 'meta-skin' technology that can cloak objects from radar waves using rows of small liquid-metal devices. The meta-skin demonstrates 75% radar suppression in the frequency range of 8 to 10 gigahertz, making it suitable for electromagnetic frequency tuning, shielding and scattering suppression.
Dr. Chung-Tse Michael Wu, an assistant professor of electrical and computer engineering at Wayne State University, has received a $500,000 NSF CAREER grant to develop antennas made of novel transmission-line-based metamaterials for a high-speed, microwave panoramic camera.
Researchers are collecting measurements of plant mass, tree distribution and diversity of species from Gabon's rainforest, wetlands and savanna. The data will help prepare for upcoming spaceborne missions to better gauge the role of forests in Earth's carbon cycle.
Scientists at Nanyang Technological University have developed a chip that allows radar cameras to be made as small as palm-sized while maintaining high image quality. The new technology has the potential to revolutionize various applications including unmanned aerial vehicles, driverless cars, and satellite imaging.
GPM satellite reveals heavy rainfall and a well-defined circular eye in Tropical Cyclone Uriah, but also detects a weakening trend starting on Feb. 17, with maximum sustained winds peaking at 125 knots (144 mph) on Feb. 18.
Researchers used Doppler polarimetric radar data to study nocturnal migrating songbirds in Eastern North America. The study found that birds strongly compensated for wind drift near the Atlantic coast, increasing their compensation throughout the night.
The NASA GPM satellite examined violent thunderstorms in the southern US on February 2-3, with one powerful storm in North Carolina dropping rain at an extreme rate of 112.96 mm (4.4 inches) per hour. The satellite's radar instruments measured precipitation within the area and created a 3D cross-section through the storms.
Using ground-penetrating radar, researchers mapped wombat warrens, finding that soil warrens consist of a single tunnel underground, while limestone warrens feature extensive tunnels and chambers. This discovery has important implications for estimating wombat numbers and understanding their social structure.
A historic blizzard is forecast for Washington, D.C., while states from Texas to Florida experience severe weather due to a developing winter storm. Severe weather, including hail and at least one reported tornado, has been observed along the Gulf Coast.
Kyoto University and Panasonic Corporation have created a new remote-sensing technology that can measure heartbeats in real-time and with high accuracy. The system uses millimeter-wave radar and signal analysis algorithms to extract heartbeats from the radar signal, differentiating them from other body signals.
Tropical Cyclone Ula formed on Dec 30 and intensified with rain rates exceeding 83.6 mm per hour, generating rough surf and dangerous coastal conditions for Fiji and American Samoa.
Researchers from the University of Cambridge developed a new smartphone-based system called SegNet, which can identify objects in road scenes in real-time, even without GPS. The system has been successfully tested on city roads and motorways, and could potentially be used as a warning system for driverless cars.
Super Typhoon Melor dropped heavy rainfall on the Philippines in December 2015, with the Global Precipitation Measurement (GPM) satellite capturing its intensity. The GPM data showed that the storm's eye wall was producing intense storms with precipitation rates of over 86 mm/hour.
The Global Precipitation Measurement mission found extreme rainfall rates of over 266 mm/h in Typhoon In-fa, driven by powerful convective thunderstorms. The satellite's Dual-Frequency Precipitation Radar instrument provided detailed insights into the storm's structure and intensity.
Data from NASA's GPM core satellite showed Tropical Storm In-fa becoming better organized over the previous 24 hours, with rainfall rates reaching up to 55 mm/h. The storm is expected to intensify through the weekend, bringing maximum sustained winds of 115 mph.