September 6, 2019
Powerful Category 5 Hurricane Dorian struck the northern parts of the Bahamas on Sunday, September 1. Dorian first pummeled the Abaco Islands before stalling and battering Grand Bahama Island more than 40 hours with heavy rain and catastrophic storm surge. The National Oceanic and Atmospheric Administration’s (NOAA) GOES East satellite provided rapid, highly detailed imaging so that forecasters would have critical information about the storm’s movement. In the evening hours of September 2, the European Space Agency’s Sentinel-1A satellite also passed over the Bahamas, with a synthetic aperture radar (SAR) system capable of imaging the land surface through all but the most intense of Dorian’s rainfall bands to afford a view of what was occurring on the ground. The data was then processed by the Advanced Rapid Imaging and Analysis (ARIA) team at NASA’s Jet Propulsion Laboratory in collaboration with the European Space Agency, the California Institute of Technology and the Earth Observatory of Singapore. View fullscreen on the NASA Disasters Mapping Portal This interactive map from the NASA Disasters Mapping Portal displays a SAR-derived flood proxy map (FPM) for September 2nd, 2019 overlaid on GOES East imagery from the same time as the Sentinel-1A overpass. By moving the spyglass you can view flooded regions, which are shown in blue. The yellow box indicates the extent of the SAR data collected. With the help of Sentinel-1A, NASA scientists derived products to help identify the storm’s impacts on parts of the Bahamian island chain. These included a false-color composite from the Alaska Satellite Facility, the NASA Distributed Active Archive Center responsible for distributing SAR data. View fullscreen on the NASA Disasters Mapping Portal
September 5, 2019
A damage assessment map derived from satellite data shows conditions on one island in the Bahamas on Sept. 2. Red and yellow areas are likely the most damaged. Credit: NASA-JPL, Caltech, Earth Observatory of Singapore. Copyright contains modified Copernicus Sentinel data (2019), processed by ESA Versión en español NASA has created and provided to emergency response organizations a detailed damage assessment map of the Bahamas based on satellite data after Hurricane Dorian hit the islands earlier this week. For over a week, a response team from NASA’s Earth Science Disasters Program has worked to create maps of impacts and potential impacts from the storm and make them available to decision makers. The new damage assessment map used satellite data from the European Union’s Sentinel-1 Copernicus instrument to identify areas (shown in red and yellow) that were likely most affected by the storm’s Category 5 winds and storm surge. The map was created by the Advanced Rapid Imaging and Analysis (ARIA) team at NASA’s Jet Propulsion Laboratory in collaboration with the European Space Agency, the California Institute of Technology and the Earth Observatory of Singapore.
September 4, 2019
Video of GPM Satellite observes Hurricane Dorian over the Bahamas The NASA / JAXA Global Precipitation Measurement (GPM) Core Observatory flew over Hurricane Dorian on September 1st (5:22pm ET / 21:22 UTC) as the storm was directly over Abaco Island in The Bahamas. The satellite captured data on rainfall rates within the storm as it flew over using its Dual-frequency Precipitation Radar (DPR) and GPM Microwave Imager (GMI). In this animation the multi-satellite GPM IMERG product is shown first to illustrate rainfall rates prior to the overpass. When the camera zooms in data from the DPR is shown, revealing the structure and intensity of precipitation within the eye of the storm. At the time of this overpass Dorian was a category 5 hurricane with maximum sustained winds of 185 mph (295 km/h) and gusts over 200 mph.
September 4, 2019
A new view of Hurricane Dorian shows the layers of the storm, as seen by an experimental NASA weather satellite that's the size of a cereal box. TEMPEST-D reveals rain bands in four layers of the storm as Hurricane Dorian approaches Florida on Sept. 3, 2019. The multiple vertical layers show where the strongest convective "storms" within the hurricane are pushing high into the atmosphere, with pink, red and yellow corresponding to the areas of heaviest rainfall.
September 3, 2019
NASA's ARIA team used satellite data acquired on Sept. 2, 2019, to map flooding in the Bahamas in the wake of Hurricane Dorian. Credits: NASA/JPL-Caltech, ESA While many NASA missions are tracking Hurricane Dorian as the storm makes its way toward the United States, some researchers are looking at what Dorian has already left behind. The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory in Pasadena, California, used synthetic aperture radar data from the European Space Agency's (ESA's) Copernicus Sentinel-1 satellites to produce this flood map of the Bahamas. The light blue color indicates areas that were likely flooded when the data were acquired on Sept. 2, 2019. In particular, the map shows flooding in and around Marsh Harbour in the Abaco Islands. The map covers an area of about 109 miles by 106 miles (176 kilometers by 170 kilometers) shown by the large red polygon. Each pixel measures about 32 yards (30 meters) across. Authorities and responders can use flood maps like this one as guidance to identify areas that are likely experiencing flooding; the map may be less reliable over urban or vegetated areas. NASA works to leverage the power of our views of Earth from space and research aircraft to assist communities around the world as they plan for — and recover from — a wide range of disasters, from earthquakes to wildfires and severe weather events like hurricanes. NASA’s Disasters Program, part of the Earth Science Division in the Science Mission Directorate, draws together expertise from across the agency when disaster strikes to provide information products for emergency responders.
August 30, 2019
As Hurricane Dorian slowly approaches Florida’s Atlantic coast, NASA personnel have engaged with federal, state and local emergency responders in preparation for landfall as soon as Labor Day. A team of NASA disaster coordinators from the Earth Science Division’s Disasters Program has been activated to work with emergency agencies to determine what NASA information assets derived from satellite data can be provided to help decision makers direct resources and help communities likely to be affected by the storm. NASA has already created a map of Florida showing current soil moisture conditions to help scientists and response agencies predict the impact of heavy rainfall from Hurricane Dorian on flooding and runoff across the state. The map uses data from the NASA-NOAA Suomi NPP satellite. This and other data products are made available from the program’s mapping portal.
August 30, 2019
NASA data shows that in many parts of the state the soil is already saturated with moisture - a condition that could lead to increased flooding as Hurricane Dorian heads for a potential landfall in central Florida. Analyzing soil moisture conditions in advance of an approaching weather system helps researchers and disasters response agencies anticipate the impact of heavy rainfall and identify regions which are more likely to experience runoff and flooding. Using a land surface modeling system which incorporates near real-time satellite observations, NASA developed soil moisture maps for the region. This interactive slider allows comparison in SPoRT-LIS soil moisture between the near-surface layer on the left (0 – 10cm) and the deeper layer on the right (0 – 2m) on Sunday, August 25, 2019. Relative soil moisture is reflected by the colors shown, ranging from gray (0%) to red (100%). 0% represents the wilting point of soil moisture, which means that vegetation can no longer extract water from the ground. 100% indicates complete saturation, which means that the soil can no longer hold any more water. Click the layers icon in the upper right corner to view the full colorbar and legend.
August 29, 2019
UPDATE 9/5/19: Hurricane Dorian continues to generate tremendous amounts of rainfall, and has left over three feet of rain in some areas of the Bahamas and is now lashing the Carolinas. NASA’s IMERG product provided a look at those rainfall totals.
July 26, 2019
On July 4 and 5 near the city of Ridgecrest in Southern California two large-magnitude earthquakes struck, generating surface ruptures and damaging homes and businesses. NASA's GeoGateway team, led by research scientist Andrea Donnellan, conducted a series of drone flights to map in 3D the post-earthquakes changes in topography and terrain. The data was requested by the California Earthquake Clearninghouse and the Geotechnical Extreme Events Reconnaissance (GEER) Association, with flight locations supplied by Christine Goulet, Executive Director for Applied Science at the Southern California Earthquake Center (SCEC).
July 26, 2019
These images compiled by NASA’s Multi-angle Imaging SpectroRadiometer (MISR) Active Aerosol Plume-Height Project illustrate smoke heights from the Bearnose Hill and Shovel Creek fires in Alaska on July 6. MISR’s stereo texture and color images enable accurate mapping of wildfire smoke-plume heights, distinguishing smoke plumes from clouds based on detected particle properties. On July 6 and 8, MISR observed multiple fire plumes emanating from a wildfire outbreak across Alaska. Imagery from the Moderate Resolution Imaging Spectroradiometer (MODIS) on July 6 shows dense smoke from the Bearnose Hill fire near the Alaska-Canada border and the less-prominent Shovel Creek fire farther southeast. Imagery from July 8 shows the Kuzitrin River fire plume being swept east across the Seward Peninsula. The dispersion of these plumes and the data on their heights is influenced by topography and local weather conditions.