Earth  ID: 4932

NASA/JAXA GPM Satellite Eyes Hurricane Ida Shortly Before Landfall

Hurricane Ida struck southeast Louisiana as a powerful Category 4 storm on Sunday, Aug. 29, 2021- the 16th anniversary of Hurricane Katrina’s landfall in 2005. Ida brought destructive storm surge, high winds, and heavy rainfall to the region, and left over 1 million homes and businesses without power, including the entire city of New Orleans.

The NASA / JAXA GPM Core Observatory satellite flew over the eye of Ida shortly before landfall at 10:13 a.m. CDT (1513 UTC), capturing data on the structure and intensity of precipitation within the storm. This animation shows NASA's IMERG multi-satellite precipitation estimates and NOAA GOES-E satellite cloud data, followed by 3D data from the GPM Core satellite. NASA processed these observations in near real-time and made them available to a wide range of users including weather agencies and researchers.

After Ida passed over Cuba as a Category 1 storm, it intensified rapidly to reach Category 4 strength near its Louisiana landfall. According to the National Hurricane Center (NHC), Ida's central pressure reached a minimum of 929 hPa with a 15 nautical mile (17 statute mile) wide eye. At the time, Ida had its lifetime-maximum wind speed of 130 kt (150 mph) in the eyewall shortly before 10 a.m. CDT on Aug. 29.

The 3D Dual-frequency Precipitation Radar (DPR) data collected by the GPM Core satellite shows a healthy hurricane inner core in Ida. The small 17-mile-diameter eyewall is surrounded by a nearly complete outer ring of precipitation approximately 85 miles in diameter. Beyond this central structure, an arc of precipitation exists another 40 miles further from the eye to the southeast. The eye hosts many clouds extending well above 6 miles (10 km), which indicates that Ida was still actively growing at the time of this overpass.

NASA continues to monitor Ida as it moves north over the southeastern U.S., providing Earth-observing satellite data, maps and analysis to stakeholders to aid response and recovery efforts.

Get the latest updates on Hurricane Ida from the National Hurricane Center (NHC).

Learn more about how NASA monitors hurricanes.

GPM data is archived at

Alternate Version


Visualization Credits

Alex Kekesi (GST): Lead Data Visualizer
Greg Shirah (NASA/GSFC): Data Visualizer
George Huffman (NASA/GSFC): Lead Scientist
Owen Kelley (George Mason University): Lead Scientist
Scott Braun (NASA/GSFC): Lead Scientist
Ryan Fitzgibbons (USRA): Producer
Owen Kelley (George Mason University): Lead Writer
Jacob Reed (Telophase): Editor
Please give credit for this item to:
NASA's Scientific Visualization Studio

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Global Precipitation Measurement (GPM)

Data Used:
GPM/DPR/Ku also referred to as: Volumetric Precipitation data
Observed Data - JAXA - 8/29/2021 15:11 - 15:41Z
Data provided by the joint NASA/JAXA GPM mission.
8/28/2021 15:11Z - 8/29/2021 15:41Z
Advanced Baseline Imager (ABI) has 16 spectral bands, including two visible channels, four near-infrared channels and ten infrared channels. It is nearly identical to the imagers on Himawari 8 and Himawari 9.
GPM/GMI/Surface Precipitation also referred to as: Rain Rates
8/29/2021 15:10 - 15:15Z
Data provided by the joint NASA/JAXA GPM mission.
also referred to as: IMERG
Data Compilation - NASA/GSFC - 8/28/2021 15:11Z - 8/29/2021 15:41Z
Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

This item is part of these series:
GPM Animations

DLESE >> Atmospheric science
SVS >> Gulf Coast
DLESE >> Hydrology
DLESE >> Natural hazards
GCMD >> Earth Science >> Atmosphere >> Atmospheric Phenomena >> Hurricanes
GCMD >> Earth Science >> Atmosphere >> Precipitation >> Rain
GCMD >> Location >> Gulf Of Mexico
GCMD >> Location >> Louisiana
SVS >> Hyperwall
NASA Science >> Earth
NASA Earth Science Focus Areas >> Weather and Atmospheric Dynamics

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version