Hurricane Hanna

Losses, 2024 dollars

$1.3 billion

Losses at the time

$1.1 billion

Deaths

0

The losses and deaths are NCEI’s, counting everything the disaster did. The episodes below are only what the Weather Service filed in its Storm Events record, which counts damage differently and often not at all, so the two never add up and are shown apart.

• Flash Flood and Flooding in Virginia, July 23, 2020$50,000 · 4 eventsA hot and humid airmass along with a slow moving boundary led to some showers and thunderstorms. Weak winds aloft caused storms to move slowly, and this led to some instances of flooding and flash flooding.
• Flash Flood in Pennsylvania, July 23, 2020$10,000 · 1 eventLocations hit by rain the evening of July 23rd were prime for possible flooding given development of rain earlier in the day. A marginal for excessive rainfall was in place as well given the 1.8 to 1.9 PWATS. A crossing trough created the development of thunderstorms and showers.
• Flash Flooding and Flooding in Nebraska, July 23 to 26, 2020$200,000 · 4 eventsA cluster of thunderstorms became stationary over Dundy County during the evening of the 23rd. The storm activity spread to the south and west through the rest of the 23rd into the 24th before ending from west to east.
• Flash Flooding and Flood in Maryland, July 23 to 24, 2020$160,000 · 7 eventsA hot and humid airmass along with a slow moving boundary led to some showers and thunderstorms. Weak winds aloft caused storms to move slowly, and this led to some instances of flooding and flash flooding.
• Flash Flood and Flood in Colorado, July 23 to 24, 2020$400 · 2 eventsA stationary thunderstorm producing prolonged heavy rainfall over Dundy County Nebraska began to develop west into Yuma County during the night. The heavy rainfall continued into the overnight hours before ending.
• Flash Flooding in New Jersey, July 24, 20205 eventsThunderstorms brought heavy rain to parts of central New Jersey on the night of July 23 to 24. Rainfall amounts as high as 3 to 5 inches occurred in parts of Middlesex County and Monmouth County.
• Flash Flood and Flood in Kansas, July 23 to 24, 2020$400 · 2 eventsA cluster of stationary thunderstorms producing heavy rainfall over Dundy County Nebraska expanded south into Cheyenne County. Rainfall amounts of over eight inches fell, with the highest amounts of rain occurring near the Nebraska border.
• Flash Flooding in New Jersey, July 24, 20203 eventsA cold front slowly sank south across the area during the morning. With plenty of instability in place, showers and thunderstorms developed along the front and slowly moved south across northeast New Jersey during the morning hours.
• Flash Flooding in Pennsylvania, July 24, 20202 eventsMultiple rounds of thunderstorms brought locally heavy rain to parts of Philadelphia and adjacent areas of lower Montgomery County and lower Bucks County. Isolated locations received as much as 2 to 4 inches of rain over the course of the day.
• Tornado in Arizona, July 24, 2020EF0 · 1 eventA weak, rope-like tornado touched down in open desert east of Kingman, tracked north for eight miles, and dissipated without causing any damage.
• Flash Flood in New Jersey, July 24, 20201 eventThunderstorms brought locally heavy rain to parts of southern New Jersey on the afternoon of July 24. Isolated locations received as much as 2 to 3 inches of rain.
• Flash Flooding in Utah, July 24, 20203 eventsMonsoon moisture and slow-moving thunderstorms caused flooding across southern and eastern Utah.
• Tornado in Arizona, July 24, 2020EF0 · 1 eventThunderstorms developed over higher terrain to the northeast of Phoenix during the afternoon hours on July 24th. One of stronger storms developed near Saguaro Lake; the storm generated strong outflow boundaries that moved to the southwest and away from the parent storm.
• Flash Flooding and Damaging Winds in New Mexico, July 24, 2020$130,000 · 59 kt wind · 4 eventsA deep tap of monsoon moisture continued surging north into New Mexico on July 24, 2020, setting the stage for additional showers and thunderstorms with torrential rainfall, localized flash flooding, and strong microburst winds.
• Tornado and Damaging Winds in Minnesota, July 24 to 25, 2020$205,000 · EF0 · 15 eventsFriday, July 24th, was one of the hottest and most humid days of 2020. Afternoon high temperatures ranged from the upper 80s to middle 90s, with dew points in the middle 70s to lower 80s.
• Flash Flooding and Flooding in South Dakota, July 24 to 26, 202051 kt wind · 6 eventsStorms tracked across north central and northeast South Dakota during the evening hours of July 24th and into July 25th.
• Flood in South Dakota, July 24 to 29, 20201 eventVery heavy rains of 4 to 12 inches fell across northwest Brown county producing flooding. Runoff from this rainfall brought major to record flooding on Elm River from Frederick to Westport to Ordway.
• Tropical Storm and Coastal Flood in Texas, July 25 to 26, 20208 eventsHanna made landfall on the lower Texas coast but produced tropical storm force winds and elevated tides, minor coastal flooding across coastal Matagorda and Brazoria Counties.
• Hurricane and Tornadoes in Texas, July 25 to 26, 2020$54 million · EF0 · 33 eventsHurricane Hanna was the first hurricane of the 2020 Atlantic Basin hurricane season and made landfall on the lower Texas coast north of Port Mansfield on the afternoon of the 25th. Hanna was the first hurricane to make landfall in Texas since Hurricane Harvey.
• Tornadoes and Flash Flooding in Minnesota, July 25 to 26, 2020EF1 · 10 eventsA very anomalous moist atmosphere was in place for this flash flood event to develop. Precipitable water values (PWATs) were over 2 inches across southern Minnesota which is well over climatological normals.
• Hurricane and Tornado in Texas, July 25 to 31, 20205 deaths · $906 million · EF0 · 21 eventsHurricane Hanna, the 2020 Atlantic season's first Hurricane, made landfall along the unpopulated Padre Island National Seashore on the mid-Kenedy County coastline as a Category 1 storm at around 5 PM Central Time Saturday, July 25th, carrying sustained 90 mph winds with gusts…
• Flash Flooding and Damaging Wind in Tennessee, July 25, 202050 kt wind · 3 eventsScattered showers and thunderstorms developed during the afternoon producing heavy rainfall and one storm produced damaging winds.
• Flash Flood and Damaging Winds in Nebraska, July 25, 2020$20,000 · 61 kt wind · 6 eventsScattered thunderstorms, including a few supercells, slowly progressed across portions of the Sandhills and southwest Nebraska during the evening hours. Winds were estimated at 70 mph around North Platte, while flash flooding impacted Ogallala.
• Flash Flooding in Wisconsin, July 26, 2020$30,000 · 7 eventsA slow moving area of thunderstorms ahead of a cold front led to rainfall amounts of 2 to 5 inches in a short amount of time across parts of Price and Sawyer Counties. Numerous roads and county highways had water over them or were washed out.
• Tornado in Texas, July 26, 2020$50,000 · EF0 · 1 eventHurricane Hanna made landfall on the South Texas coast on the afternoon of July 25 and moved across the southern part of the state. A rain band from the storm moved through South Central Texas during the morning of July 26 and produced a tornado in Wilson County.
• Flash Flood in Wisconsin, July 26, 2020$319,000 · 1 eventAn approaching cold front interacted with a hot and humid airmass to produce areas of showers and thunderstorms that produced heavy rain across portions of northern Wisconsin during the morning hours.
• Flash Flooding and Heavy Rain in Kansas, July 26 to 27, 2020$50,000 · 6 eventsCold front brings slow moving thunderstorms and heavy rain to extreme southern portions of south central Nebraska during the late afternoon and evening of July 26.
• Flash Flood and Damaging Wind in Nebraska, July 26 to 27, 2020$25,000 · 52 kt wind · 6 eventsCold front brings slow moving thunderstorms and heavy rain to extreme southern portions of south central Nebraska during the late afternoon and evening of July 26.
• Flash Flooding in New Mexico, July 26, 2020$250,000 · 4 eventsThe richest plume of monsoon moisture of the entire season set up over New Mexico on the weekend of July 25-26, 2020. The center of upper level high pressure drifted west into the state from west Texas while a weak upper level disturbance moved slowly north from eastern Arizona.
• Heavy Rain in Hawaii, July 26 to 27, 20202 eventsAs Hurricane Douglas was passing just north of the islands, heavy showers developed over portions of Maui and Kauai. The rain caused ponding on roadways, and small stream and drainage ditch flooding. No significant property damage or injuries were reported.
• Heavy Rain in Wisconsin, July 26, 20201 death · $20,000 · 1 eventOne person was killed in a single vehicle accident as thunderstorms with heavy rain moved across western Wisconsin during the afternoon of July 26th. The accident occurred on State Highway 56 east of Liberty (Vernon County).
• Flash Flooding and Damaging Wind in Nebraska, July 26, 202052 kt wind · 3 eventsA strong storm in Gage County produced damaging winds and flash flooding.
• Flash Flooding in Kentucky, July 26, 20202 eventsWith high temperatures in the 90s, central Kentucky sat in an area of upper and lower high pressure. During diurnal heating, very slow moving thunderstorms with heavy rainfall developed, causing flash flooding in Adair County.
• Tornado and Damaging Wind in Alabama, July 26, 2020$500 · 2 eventsAn isolated thunderstorm developed over Decatur and also over the adjacent waters of Lake Wheeler (Tennessee River system) between 1740-1800 LST. A well photographed and reported waterspout developed around 1753 LST and lasted several minutes.
• Flash Flood in New Mexico, July 26, 2020$2.4 million · 1 eventModest low level moisture and good mid level moisture combined with an area of surface convergence to produce significant rainfall across central Sierra County.
• Flash Flooding in Kansas, July 26, 20204 eventsFlash flooding occurred in several counties following a batch of strong thunderstorms in north-central KS. An isolated storm in Franklin County also caused flooding.
• Flash Flooding in Colorado, July 26, 20203 eventsThere was potential for isolated strong to severe thunderstorms across far southeast Colorado late in the afternoon and evening, however, flash flooding was more of a concern this day, especially for the Decker and Spring burn scars.
• Heavy Rain in Wisconsin, July 26, 20201 eventA slow moving line of thunderstorms associated with a cold front produced a quick couple inches of rain in Kenosha. Street flooding occurred in several intersections.
• Flash Flood in Kentucky, July 26, 2020$10,000 · 1 eventScattered storms were ongoing across portions of eastern Kentucky during the evening hours on July 26.
• Flash Flooding and Heavy Rain in Colorado, July 26 to 27, 20206 eventsAnother day of showers and thunderstorms occurred over a good portion of southern Colorado.
• Flash Flood in Missouri, July 27, 20201 eventAs a cold front moved through the region, showers and storms developed. One area of storms produced very heavy rainfall and flash flooding over portions of Lincoln County.
• Flash Flooding and Heavy Rain in New York, July 27, 202014 eventsA hot and very moist air mass was in place across the region with dewpoints in the 70s and precipitable water values approaching 2 inches. Diurnal instability along a lake breeze boundary allowed for convection to develop.
• Flash Flood and Damaging Winds in Utah, July 27, 202058 kt wind · 9 eventsA storm system moved across the Great Basin, triggering numerous thunderstorms.
• Flood and Damaging Winds in Ohio, July 27, 2020$33,000 · 50 kt wind · 14 eventsA line of thunderstorms moved through the Ohio Valley ahead of an advancing cold front.
• Flash Flood in Texas, July 27, 20201 eventOn the afternoon of the 27th, scattered thunderstorms developed along a weak cold frontal boundary across the extreme southern Texas Panhandle. These storms brought intense rainfall but were relatively quick moving.
• Flash Flood in Missouri, July 27, 20201 eventIsolated small clusters of thunderstorms formed during the heat of the afternoon. A 500 mb trough digging southeast across the Great Lakes region forced a cold front southeastward into southern Illinois by evening.
• Flash Flooding in Arizona, July 27, 20202 eventsDeep monsoon moisture and unstable air moved over northern Arizona. This triggered thunderstorms with heavy rain.
• Flash Flooding in Texas, July 27, 20203 eventsAdditional feeder bands redeveloped in unstable air Monday afternoon and evening in western Cameron and eastern Hidalgo County even after Hurricane Hanna moved inland and dissipated across Mexico, exacerbating the ongoing flood conditions in the Rio Grande Valley.

Every billion-dollar disasterEvery storm of 2020The 2020 hurricane seasonTornadoes in 2020

NOAA NCEI, U.S. Billion-Dollar Weather and Climate Disasters (2025), https://doi.org/10.25921/stkw-7w73, and the Storm Events Database for the episodes.