May 1964 storm reports: hail, wind and tornadoes
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In May 1964, 158 hail, 148 damaging-wind and 134 tornado reports were logged on 31 storm days across 37 states. The largest hail reported was 4.50″ (softball size) in Clark County, SD on May 5, 1964. The most hail reports came on May 5, 1964 (25). Tornadoes killed 16.
Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology
← April 1964 All 1964 storm days June 1964 →
Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.
Biggest storm days of May 1964
| Day | Hail | Wind | Tornado | Largest hail | States |
|---|---|---|---|---|---|
| May 5, 1964 | 25 | 17 | 34 | 4.50″ | 8 |
| May 7, 1964 | 16 | 9 | 14 | 3.00″ | 7 |
| May 1, 1964 | 17 | 17 | 4 | 3.25″ | 6 |
| May 8, 1964 | 4 | 10 | 16 | 1.50″ | 7 |
| May 29, 1964 | 14 | 7 | 8 | 3.00″ | 4 |
| May 10, 1964 | 13 | 5 | 10 | 3.00″ | 4 |
| May 23, 1964 | 6 | 15 | 7 | 2.75″ | 7 |
| May 4, 1964 | 12 | 2 | 8 | 2.75″ | 3 |
| May 26, 1964 | 9 | 6 | 6 | 1.75″ | 7 |
| May 25, 1964 | 5 | 8 | 5 | 2.50″ | 4 |
Largest hail reported in May 1964
| Day | Size | Location |
|---|---|---|
| May 5, 1964 | 4.50″ (softball) | Clark County, SD |
| May 5, 1964 | 4.00″ (grapefruit) | Big Stone County, MN |
| May 5, 1964 | 3.50″ (teacup) | Wayne County, NE |
| May 5, 1964 | 3.50″ (teacup) | Dodge County, NE |
| May 1, 1964 | 3.25″ (teacup) | Canadian County, OK |
| May 5, 1964 | 3.00″ (teacup) | Day County, SD |
| May 7, 1964 | 3.00″ (teacup) | Gage County, NE |
| May 7, 1964 | 3.00″ (teacup) | Fremont County, IA |
| May 9, 1964 | 3.00″ (teacup) | Comanche County, OK |
| May 10, 1964 | 3.00″ (teacup) | Grady County, OK |
Storm reports by state, May 1964
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| Texas | 27 | 27 | 15 | 3.00″ |
| Oklahoma | 34 | 9 | 22 | 3.25″ |
| Wisconsin | 22 | 5 | 16 | 2.75″ |
| Iowa | 9 | 19 | 14 | 3.00″ |
| Nebraska | 16 | 8 | 13 | 3.50″ |
| Kansas | 13 | 4 | 13 | 2.75″ |
| Minnesota | 12 | 13 | 5 | 4.00″ |
| South Dakota | 4 | 6 | 12 | 4.50″ |
| Florida | 2 | 7 | 1 | 1.50″ |
| Michigan | 0 | 4 | 6 | – |
| Illinois | 0 | 7 | 0 | – |
| Missouri | 3 | 3 | 1 | 2.00″ |
| Louisiana | 4 | 2 | 0 | 2.75″ |
| North Carolina | 1 | 4 | 0 | 0.75″ |
| New Mexico | 2 | 0 | 2 | 2.00″ |
| Ohio | 0 | 3 | 1 | – |
| Tennessee | 1 | 3 | 0 | 0.75″ |
| Wyoming | 1 | 1 | 2 | 3.00″ |
| Arkansas | 0 | 2 | 1 | – |
| Indiana | 0 | 2 | 1 | – |
| Kentucky | 2 | 1 | 0 | 1.75″ |
| Mississippi | 0 | 3 | 0 | – |
| New York | 1 | 2 | 0 | 0.75″ |
| Washington | 0 | 1 | 2 | – |
| Alabama | 0 | 2 | 0 | – |
| Georgia | 0 | 2 | 0 | – |
| Idaho | 1 | 0 | 1 | 1.00″ |
| Massachusetts | 0 | 0 | 2 | – |
| Montana | 0 | 2 | 0 | – |
| North Dakota | 0 | 0 | 2 | – |
| Nevada | 0 | 0 | 2 | – |
| South Carolina | 2 | 0 | 0 | 2.75″ |
| Virginia | 0 | 2 | 0 | – |
| Vermont | 1 | 1 | 0 | 1.00″ |
| Connecticut | 0 | 1 | 0 | – |
| Maine | 0 | 1 | 0 | – |
| Pennsylvania | 0 | 1 | 0 | – |
Every storm day in May 1964
May 1 May 2 May 3 May 4 May 5 May 6 May 7 May 8 May 9 May 10 May 11 May 12 May 13 May 14 May 15 May 16 May 17 May 18 May 19 May 20 May 21 May 22 May 23 May 24 May 25 May 26 May 27 May 28 May 29 May 30 May 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.