Science

Though the last traces of winter are melting away and spring showers are in full swing across the U.S., the story of snow is not quite over for the season. In mid-April, two winter field campaigns involving NASA researchers are wrapping up, bringing with them unprecedented observations of snowfall. Understanding when, where, and how much snow is falling is critical for scientists and the public alike. In the short-term, accurate snowfall data can help weather forecasters prepare communities and plan against hazardous road conditions, power outages, and health risks. Over the long-term, these

Above image: Attendees of the 2024 PMM Science Team Meeting.

Above image: Attendees of the 2023 PMM Science Team Meeting.

The Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Storms ( IMPACTS) mission, now in its second year, is flying aircraft into snowstorms in order to improve meteorological models and our ability to use satellite data to predict how much snow will fall and where. NASA and its partners have several satellites that measure precipitation from space, such as the Global Precipitation Measurement (GPM) mission that observes rain and snow around most of the world every three hours. “But satellites can’t tell us a lot about the particles – the actual snowflakes ­– and

Presentations and Posters Monday, November 1st Session 1: Programatics / PMM Business (Chair: A. Hou) 8:00 - 8:30 PMM Science A. Hou Download 8:30 - 8:50 TRMM Science S. Braun Download 8:50 - 9:10 GPM Project A. Azarbazin Download 9:10 - 9:30 PPS E. Stocker Download 9:30 - 9:50 X-Callibration Status T. Wilheit Download 9:50 - 10:10 Working Group Organization G. S.-Jackson Download Session 2: Partner Reports (Chair: C. Kummerow) 10:40 - 11:00 NOAA R. Ferraro Download 11:00 - 11:20 ESA Proposal: Polar Precipitation Mission C. Kidd / P. Joe Not Available 11:20 - 11:50 PPM related activities in

Presentations Monday, March 18th Session 1: Programmatics (Chair: S. Braun/A. Hou) 8:00 – 8:05 NASA HQ PMM Welcome and Program Status R. Kakar Download 8:05 – 8:25 NASA HQ Perspective J. Kaye Not Available 8:25 – 8:45 NASA PMM Science A. Hou Download 8:45 – 9:05 NASA TRMM Science S. Braun Download 9:05 – 9:25 NASA GPM Project A. Azarbarzin Download 9:25 – 9:45 Precipitation Processing System (PPS) E. Stocker Download 10:15 – 10:35 JAXA TRMM/GPM Program Status R. Oki Download 10:35 – 10:55 JAXA TRMM Science Status Y. Takayabu Download 10:55 – 11:15 JAXA GPM Science Status K. Nakamura Download

Presentations Tuesday, August 5th Session 1: Programmatics (Chair: S. Braun/G. Jackson) 8:00 - 8:05 NASA HQ PMM Welcome and Program Status R. Kakar 8:05 - 8:25 NASA HQ Perspective M. Freilich 8:25 - 8:45 NASA PMM Science G. Jackson 8:45 - 9:05 NASA TRMM Science S. Braun 9:05 - 9:20 NASA GPM Project and GMI Sensor Status A. Azarbarzin 9:20 - 9:40 Precipitation Processing System (PPS) E. Stocker 9:40 - 10:00 GPM’s Application Science and EPO D. Kirschbaum 10:30 - 10:45 JAXA TRMM/GPM Program Status R. Oki 10:45 - 11:00 DPR Sensor Status K. Furukawa 11:00 - 11:15 JAXA TRMM Science Status N

During the summer, the U.S. Great Plains routinely experiences nighttime thunderstorms unlike anywhere else in the country. These large-scale storms—sometimes spanning entire states—account for more than 40 percent of annual rainfall in some areas. They can bring much-needed rain to farms and help recharge aquifers, but extremely severe events can also destroy fields, homes, and lives. Scientists have been studying the region for decades to learn the underpinnings of this distinct, repetitive weather pattern.