October 3, 2022 - Flooding in Florida

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After crashing across the Caribbean, causing damage in Jamaica, Cayman
Islands, and Cuba, Hurricane Ian made landfall in southwestern Florida
on September 28, 2022, as a strong Category 4 storm, carrying maximum
sustained winds of 150 mph (241 km/h). Over the next twenty-four hours
Ian ground across the Florida Peninsula, slowly weakening in strength
as it deposited record rainfall across the state. According to the
National Hurricane Center (NHC), Ian moved off the Florida coast near
Cape Canaveral and moved over the western Atlantic Ocean at 11:00 a.m.
EST on September 29 after producing “catastrophic flooding” over much
of the state.

Our Image of the Day illustrates widespread and devastating flooding in
Florida by comparing two false-color images acquired by the Moderate
Resolution Imaging Spectroradiometer (MODIS) on board NASA’s Terra
satellite. The first image, located on the left, was acquired after the
storm on September 30, 2022. The second was acquired a week earlier, on
September 23. To interact with this roll-over comparison, click on the
image and scroll back and forth.

In this type of false-color image, visible and infrared light (MODIS
bands 7,2,1) are combined to help highlight certain features, such as
water and vegetation. Vegetation appears bright green, water looks deep
blue, cloud may appear white or be tinted with light electric blue, and
open land may be colored various shades of tan. Where dense vegetation
is water-logged (rather than under water), the color becomes darker
green.

Hurricane Ian first made landfall in Florida near Cayo Costa, an island
near Fort Meyers, then made a second landfall near Punta Gorda. These
areas can be seen on the southwestern Florida coast, almost due west of
the large, round Lake Okeechobee. The points of impact include the
large Gasparilla Sound-Charlotte Harbor (where the Peace River empties
into the Gulf of Mexico), the large Pine Island, and the barrier
islands including Sanibel Island (curving around the southern section
of Pine Island), Captiva Island, and Cayo Costa.

Much of the area located near landfall was drowned under storm surge of
seven feet or more; however, by September 30 the storm surge had
receded and cannot be seen on the image acquired that day. Major
flooding is obvious along the Peace River, which crested at a
record-setting 25.26 feet after the storm. Orlando, which sits well
inland and along the northeasterly track of Ian, received 12.49 inches
of rain between September 28 and 29, crushing that city’s 24-hour
rainfall record. The Weather Channel reported that up to 19 inches of
rain had fallen in parts of Florida in Ian’s wake.

Image Facts
Satellite: Terra
Date Acquired: 9/30/3033
Resolutions: 1km (241.4 KB), 500m (576.1 KB), 250m (346.7
KB)
Bands Used: 7.2.1
Image Credit: MODIS Land Rapid Response Team, NASA GSFC



https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-10-03

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