Storm reports for August 13, 2020

Numbers you can quote

On August 13, 2020, about 36,300 homes were inside radar-estimated hail of 1 inch or larger across 25 counties; the most were in Cass County, ND (about 15,900).

• About 15,900 homes in Cass County, ND, were inside radar-estimated hail of 1 inch or larger on August 13, 2020. Swath image

Homes are 2020 Census housing units in block groups whose center of population lay inside NOAA MRMS radar-estimated hail (MESH) of 1 inch or larger during the storm day (7 a.m. to 7 a.m. Eastern). These are radar estimates of hail size, not damage counts. More same-day numbers

Cite: National Storms. “Storm reports for August 13, 2020.” https://nationalstorms.com/storms/2020-08-13/. Data through November 6, 2026. License: CC BY 4.0.

IndependentNot affiliated with NOAA or the National Weather Service. Source: NOAA Storm Prediction Center storm reports; NOAA MRMS radar hail estimates (MESH) via the Iowa Environmental Mesonet; 2020 Census housing units. Data through November 6, 2026. Methodology

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Other storms on August 13 →

On August 13, 2020, 44 hail, 49 damaging-wind and 3 tornado reports were logged across 15 states. The largest hail reported was 2.50″ (tennis ball size) in Brown County, NE. Radar estimated hail of 1 inch or larger over 3,258 square miles containing about 36,000 homes.

Storm day runs 7 a.m. to 7 a.m. Eastern (12:00–12:00 UTC), the convention the Storm Prediction Center uses. Colored areas are NOAA MRMS radar estimates of the largest hail (MESH) over the day, lower 48 states only; radar overestimates and underestimates size, so read it with the ground reports.

Storm reports by state

Cities with the largest radar-estimated hail

Counties by homes inside 1″+ radar-estimated hail

Homes are 2020 Census housing units and people are 2020 Census residents, counted by block group where its center of population lies under radar-estimated hail of 1 inch or larger.

Hail reports (44)

Damage, injuries and deaths

National Weather Service offices recorded about $95,000 in property damage and $0 in crop damage from hail, thunderstorm wind and tornadoes across the US on this storm day (96 events in 15 states). Injuries and deaths are those the events caused directly.

What the National Weather Service wrote

• Sioux County, ND (near Cannon Ball) · Thunderstorm wind 81 mph · $24,000
  “Multiple power poles broke down in the area.”
• Pima County, AZ (near Ajo) · Thunderstorm wind 64 mph · $10,000
  “Thunderstorm winds downed several power poles in Ajo, causing a power outage for about 100 customers for 2 to 3 hours.”
• Gwinnett County, GA (near Sugar Hill) · Thunderstorm wind 52 mph · $10,000
  “The public reported a large pine tree snapped and fell damaging the porch of a home along River Island Circle.”
• Overton County, TN (near Livingston) · Thunderstorm wind 58 mph · $4,000
  “Trees were blown down in Livingston on North Spring Street, Medical Drive, First Street, and High Street.”
• Franklin County, AR (near Charleston) · Thunderstorm wind 64 mph · $2,000
  “Strong thunderstorm wind snapped large tree limbs, and blew down power poles.”
• Colbert County, AL (near Georgetown) · Thunderstorm wind 49 mph · $0
  “A tree was knocked down at 2235 Mulberry Lane. Time estimated by radar.”

Event narratives from NWS Storm Data, shortened. Up to six per day, chosen by deaths, injuries, damage and size.

Source: NOAA National Centers for Environmental Information (NCEI), Storm Events Database, as entered by National Weather Service offices; data through July 31, 2026. Damage is in dollars of the year, not adjusted for inflation.

Guides: What radar-estimated hail (MESH) is and isn't · Storm reports: preliminary vs final