August 1964 storm reports: hail, wind and tornadoes
IndependentNot affiliated with NOAA or the National Weather Service.
In August 1964, 46 hail, 122 damaging-wind and 79 tornado reports were logged on 30 storm days across 33 states. The largest hail reported was 4.00″ (grapefruit size) in Perkins County, SD on August 4, 1964. The most hail reports came on August 26, 1964 (6). Tornadoes killed 2.
Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology
← July 1964 All 1964 storm days September 1964 →
Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.
Biggest storm days of August 1964
| Day | Hail | Wind | Tornado | Largest hail | States |
|---|---|---|---|---|---|
| Aug 11, 1964 | 3 | 21 | 3 | 3.00″ | 9 |
| Aug 29, 1964 | 2 | 9 | 12 | 1.75″ | 8 |
| Aug 22, 1964 | 2 | 5 | 14 | 1.25″ | 6 |
| Aug 27, 1964 | 1 | 5 | 12 | 2.25″ | 10 |
| Aug 5, 1964 | 0 | 15 | 1 | – | 6 |
| Aug 26, 1964 | 6 | 6 | 3 | 2.50″ | 5 |
| Aug 31, 1964 | 3 | 6 | 6 | 2.00″ | 7 |
| Aug 4, 1964 | 3 | 10 | 0 | 4.00″ | 8 |
| Aug 20, 1964 | 0 | 4 | 7 | – | 4 |
| Aug 24, 1964 | 6 | 4 | 1 | 2.00″ | 5 |
Largest hail reported in August 1964
| Day | Size | Location |
|---|---|---|
| Aug 4, 1964 | 4.00″ (grapefruit) | Perkins County, SD |
| Aug 11, 1964 | 3.00″ (teacup) | Butler County, MO |
| Aug 17, 1964 | 2.50″ (tennis ball) | Dewey County, OK |
| Aug 26, 1964 | 2.50″ (tennis ball) | Kiowa County, OK |
| Aug 27, 1964 | 2.25″ (hen egg) | Cass County, MN |
| Aug 1, 1964 | 2.00″ (hen egg) | Valley County, MT |
| Aug 2, 1964 | 2.00″ (hen egg) | Charlotte County, VA |
| Aug 10, 1964 | 2.00″ (hen egg) | Lyon County, MN |
| Aug 15, 1964 | 2.00″ (hen egg) | Sherman County, KS |
| Aug 17, 1964 | 2.00″ (hen egg) | McIntosh County, ND |
Storm reports by state, August 1964
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| Kansas | 11 | 14 | 7 | 2.00″ |
| Texas | 0 | 17 | 7 | – |
| Iowa | 2 | 8 | 10 | 1.75″ |
| Oklahoma | 4 | 7 | 4 | 2.50″ |
| Arkansas | 0 | 9 | 3 | – |
| Nebraska | 3 | 7 | 2 | 1.00″ |
| North Dakota | 6 | 2 | 3 | 2.00″ |
| Missouri | 2 | 6 | 2 | 3.00″ |
| Indiana | 2 | 6 | 1 | 1.00″ |
| Michigan | 0 | 5 | 4 | – |
| Ohio | 1 | 5 | 3 | 0.75″ |
| Wisconsin | 2 | 0 | 7 | 1.25″ |
| South Dakota | 5 | 2 | 1 | 4.00″ |
| Florida | 0 | 1 | 6 | – |
| Louisiana | 0 | 6 | 1 | – |
| South Carolina | 0 | 0 | 7 | – |
| Tennessee | 1 | 5 | 1 | 1.00″ |
| North Carolina | 0 | 2 | 4 | – |
| Montana | 2 | 2 | 1 | 2.00″ |
| New York | 0 | 5 | 0 | – |
| Alabama | 0 | 4 | 0 | – |
| Minnesota | 2 | 0 | 2 | 2.25″ |
| Arizona | 0 | 1 | 1 | – |
| Colorado | 1 | 1 | 0 | 1.75″ |
| Georgia | 0 | 2 | 0 | – |
| Virginia | 1 | 1 | 0 | 2.00″ |
| Delaware | 0 | 1 | 0 | – |
| Kentucky | 0 | 1 | 0 | – |
| Maine | 1 | 0 | 0 | 0.75″ |
| New Mexico | 0 | 1 | 0 | – |
| Utah | 0 | 0 | 1 | – |
| Washington | 0 | 0 | 1 | – |
| Wyoming | 0 | 1 | 0 | – |
Every storm day in August 1964
Aug 1 Aug 2 Aug 3 Aug 4 Aug 5 Aug 6 Aug 7 Aug 8 Aug 9 Aug 10 Aug 11 Aug 12 Aug 13 Aug 14 Aug 15 Aug 16 Aug 17 Aug 18 Aug 19 Aug 20 Aug 21 Aug 22 Aug 24 Aug 25 Aug 26 Aug 27 Aug 28 Aug 29 Aug 30 Aug 31
A storm day runs 7 a.m. to 7 a.m. Eastern (12:00–12:00 UTC), the convention the Storm Prediction Center uses. Read more about NOAA storm reports.