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Alaska Rainfall 2019 and 2020
NASA's multi-satellite precipitation algorithm, known as IMERG, is a tool that can help us understand recent fluctuations in Alaska's wildfires. In the summer of 2020, wildfires burned fewer acres in Alaska than in any other year during the past 10 years. In contrast, wildfires burned a record number of acres in Alaska in the summer of 2019. The image below shows the locations of satellite-detected fires and precipitation during the last two weeks of June for both years. The above image shows IMERG rainfall totals overlaid with fire hot spot detections from the Visible Infrared Imaging
IMERG Rainfall Totals from Medicane Ianos
From September 14th - 20th, 2020, NASA’s IMERG algorithm estimated the rainfall from a Mediterranean cyclone with tropical-like characteristics, commonly known as a “Medicane”, which flooded parts of Greece. Medicanes typically appear once or twice a year and are similar to tropical storms in that both have a symmetric structure, a warm core, a clearly visible eye, and winds of at least tropical-storm strength. This particular storm system, dubbed "Ianos" by the National Observatory of Athens, led to media reports of flooding throughout the islands of Kefalonia and Zakynthos off the western
IMERG totals from hurricane sally
The northern Gulf Coast has seen its share of storms this busy hurricane season. At the end of August, then Tropical Storm Marco brought heavy rains to parts of the Florida Panhandle while western Louisiana took a direct hit from the much more powerful Category 4 Hurricane Laura. Now, just over 3 weeks since Laura made landfall, the northern Gulf Coast was struck again, this time by Hurricane Sally. Though not as powerful as Laura, the still rather strong Sally behaved more like Marco. But, while Marco was largely sheared apart with most of the rain well northeast of the center as it slowed
IMERG Rainfall from Typhoons Bavi, Maysak and Haishen
From August 22 through September 7, 2020, NASA’s IMERG algorithm estimated rainfall from three typhoons as they passed over the Pacific Ocean, Japan, and Korea. According to NOAA's records, this was the only time since records have been kept starting in 1945 that the Korean peninsula saw three landfalling typhoons in a single year, let alone in two weeks. Each of the three typhoons--Bavi, Maysak, and Haishen--reached the equivalent of “major hurricane” status, meaning Category 3 or above on the Saffir-Simpson hurricane-intensity scale (shown here as a red in the hurricane track) along their
IMERG rainfall from the Pakistan Floods 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 in the region. The amount of rain that fell that week is roughly equivalent to the amount that Karachi typically receives in an entire year, based on IMERG's 19-year global climatology. In a typical year, most of Karachi's rain will fall in July and August, but the rainfall during the week of August 23rd was unusually heavy. The top panel of the three panels in this image shows the depth of the 7-day rainfall accumulation in

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