Image from TERRA
Fri, 02 Aug 2019 14:51 EDT

The Milepost 97 fire which is located about one mile southeast of Canyonville, Oregon was first reported on Wednesday, July 24th at approximately 10:00 p.m.

Image from TERRA
Mon, 29 Jul 2019 12:00 EDT

Every evening from late spring to early fall, two planes lift off from airports in the western United States and fly through the sunset, each headed for an active wildfire, and then another, and another.

Image from TERRA
Mon, 08 Jul 2019 13:00 EDT

An uprecedented belt of brown algae stretches from West Africa to the Gulf of Mexico—and it’s likely here to stay. Scientists at the University of South Florida in St. Petersburg's College of Marine Science used NASA satellite observations to discover and document the largest bloom of macroalgae in the world, dubbed the Great Atlantic Sargassum Bel

Weather

Weather–day-to-day temperature and rainfall–plays an important role in human activities. Weather controls crop growth. It can impact transportation infrastructure and destroy homes and other structures. Accurate weather predictions can help decision makers save lives and property.

NASA develops new technologies that offer unique insight into weather and the processes that generate it. NASA scientists study weather processes to gain a more complete understanding of the Earth system. Advanced technology and greater scientific understanding of weather processes together improve weather forecasts made by operational agencies like the NOAA National Weather Service.

Terra and Weather

Terra data contribute to understanding and predicting weather phenomena. MODIS and MISR provide observations of water vapor, winds and cloud movement that are used to track motion in the atmosphere (atmospheric motion vectors) and improve weather forecasts.

Polar Winds

MODIS provides the only high-resolution satellite measurement of water vapor, which can be used with MODIS infrared measurements to observe winds in polar regions. Since Terra is in a polar orbit, MODIS collects observations over the poles every 100 minutes. By tracking how water vapor and clouds move between orbits, scientists can determine wind speed and direction. Such measurements increase the accuracy of numerical weather models used to make 10-day forecasts.

See Polar wind data blow new life into forecasts.

Wind Fields

MISR’s multi-angle stereo view can be used to track cloud motion and deduce wind speed and direction. In particular, MISR measurements provide insight into how wind speeds vary inside hurricanes of different sizes.

Terra Science on Weather in the News