El Niño Update for September 2026El Niño events occur every two to seven years, and they are driven by feedback between ocean currents and the circulation of the atmosphere over […]
El Niño and MJO: Oscillations in Global PrecipitationGMU’s CEOSR team assists NASA with testing new versions of satellite data-processing algorithms and monitoring the output of the operational version. Some of these same […]
Monitoring in 3D: Typhoon Sinlaku (2026)In April 2026, Typhoon Sinlaku impacted the Pacific Islands of Guam, Saipan, and Tinian. As the storm approached the islands and made landfall, NASA’s Global […]
Natural Cycles in Global Precipitation: Daily and YearlyIn many places, the amount of that rain falls on a particular day or hour is influenced by multiple natural cycles that exist simultaneously on […]
Atmospheric River Strikes the Pacific NorthwestDuring the first three weeks of December 2025,several atmosphere rivers have carried plumes of moisture from the Tropics toward the United States. These plumes of […]
Large rainfall accumulation from Hurricane Melissa (2025)Published October 29, 2025 Updated October 31, 2025 Hurricane Melissa Impacts Jamaica An international constellations of satellites observed Hurricane Melissa as it passed over Jamaica […]
Global Rainfall at Your FingertipsCEOSR personnel working at NASA’s Precipitation Processing System (PPS) have generated 27 years of global rainfall imagery that is now available in NASA Worldview, which […]
Significant Rain in the Sahara DesertGMU’s CEOSR team assists NASA with testing their satellite-based precipitation estimation algorithms. Some tests involve checking the algorithms’ performance during major weather events with large […]
Hurricane John Gives Southern Mexico a Surprise One-Two PunchOn Monday evening, Sept. 23, 2024, an unusual hurricane struck southern Mexico, dumping 20 inches of rainfall along the coast according to estimates from NASA’s […]
Hurricane Debbie (2024) Stalls off the Coast of South CarolinaSince 2014, NASA has run the IMERG multi-satellite algorithm to estimate how much precipitation falls over the globe every 30 minutes on a grid with […]
Geographic Variation in the Maximum 7-Day Accumulation During 23 YearsIn January 2024, a GMU CEOSR team member presented a paper that contrasted two ways to summarize extreme precipitation around the world. Specifically, Kelley (2024) […]- Hurricane Ian Crosses Florida and Heads Toward South Carolina
As Hurricane Ian impacts Florida and South Carolina, NASA IMERG algorithm provides estimates of Ian’s rainfall over both land and sea. CEOSR team members assist […] - Hurricane Fiona from Caribbean to Canada
Rainfall In Nova Scotia, Canada CEOSR team members tracked Hurricane Fiona as it approached Canada in September, 2022. One of the tools they used was […] - Hurricane Henri Fights Wind Shear on Approach to New England (August 2021)
In the North Atlantic, the tropical system known as Henri reached hurricane status on Saturday, August 21, 2021. At the time, it was approaching a […] - Two Weeks of Heavy Rain and a Year of Drought Over Parts of China (July 2021)
During July 17 to 28, 2021, several storm systems brought heavy rain to parts of China and surrounding countries, while a nine-month-long drought persists in […] - Rainfall that Matters: A Convective System over Arizona within the North American Monsoon (July 2021)
There is a monsoon that occurs in the southwestern U.S. each summer, and it brought heavy rain to the deserts of Arizona this week. This […] - Australia’s Heavy Rainfall: Desert and Coast (March 2021)
larger image: click here During the week ending on March 23, 2021, two locations in Australia experienced unusually high rainfall totals. In the news, a […] - Hurricane Sally in Context (Sept. 2020)
One way to put a storm into context is to compare its precipitation to the average annual accumulation at that location. The IMERG multi-satellite precipitation […] - A Year’s Worth of Rain in a Week for a City in Pakistan (Aug. 2020)
In the last week of August 2020, Pakistan’s largest city, Karachi, received over 8 inches of rainfall according to NASA’s IMERG dataset, causing destructive flooding […] - Hurricane Laura’s Hot Tower (Aug. 2020)
Two days before landfall, Laura had been forecasted to experience a period of weakening before landfall but instead, it ended up intensifying and deepening until […]
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