August 1970 storm reports: hail, wind and tornadoes
IndependentNot affiliated with NOAA or the National Weather Service.
In August 1970, 39 hail, 168 damaging-wind and 55 tornado reports were logged on 31 storm days across 43 states. The largest hail reported was 2.00″ (hen egg size) in Boone County, NE on August 1, 1970. The most hail reports came on August 17, 1970 (5).
Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology
← July 1970 All 1970 storm days September 1970 →
Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.
Biggest storm days of August 1970
| Day | Hail | Wind | Tornado | Largest hail | States |
|---|---|---|---|---|---|
| Aug 2, 1970 | 1 | 19 | 3 | 0.75″ | 6 |
| Aug 3, 1970 | 0 | 14 | 8 | – | 10 |
| Aug 1, 1970 | 3 | 14 | 2 | 2.00″ | 10 |
| Aug 30, 1970 | 1 | 12 | 4 | 1.50″ | 5 |
| Aug 17, 1970 | 5 | 8 | 2 | 1.75″ | 9 |
| Aug 18, 1970 | 0 | 12 | 3 | – | 9 |
| Aug 20, 1970 | 4 | 10 | 1 | 2.00″ | 7 |
| Aug 11, 1970 | 5 | 5 | 1 | 1.75″ | 7 |
| Aug 19, 1970 | 2 | 7 | 2 | 1.75″ | 8 |
| Aug 14, 1970 | 2 | 7 | 0 | 1.75″ | 6 |
Largest hail reported in August 1970
| Day | Size | Location |
|---|---|---|
| Aug 1, 1970 | 2.00″ (hen egg) | Boone County, NE |
| Aug 16, 1970 | 2.00″ (hen egg) | Cheshire County, NH |
| Aug 20, 1970 | 2.00″ (hen egg) | Niagara County, NY |
| Aug 5, 1970 | 1.75″ (golf ball) | Jefferson County, CO |
| Aug 11, 1970 | 1.75″ (golf ball) | Olmsted County, MN |
| Aug 11, 1970 | 1.75″ (golf ball) | Spink County, SD |
| Aug 14, 1970 | 1.75″ (golf ball) | Clay County, MN |
| Aug 17, 1970 | 1.75″ (golf ball) | Winn Parish, LA |
| Aug 17, 1970 | 1.75″ (golf ball) | Rolette County, ND |
| Aug 17, 1970 | 1.75″ (golf ball) | Nodaway County, MO |
Storm reports by state, August 1970
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| Texas | 0 | 7 | 20 | – |
| Nebraska | 5 | 12 | 2 | 2.00″ |
| New York | 4 | 9 | 1 | 2.00″ |
| Pennsylvania | 0 | 8 | 4 | – |
| Florida | 0 | 4 | 7 | – |
| Kansas | 1 | 9 | 1 | 1.50″ |
| Kentucky | 0 | 11 | 0 | – |
| North Carolina | 0 | 9 | 2 | – |
| Arizona | 2 | 7 | 1 | 1.00″ |
| Massachusetts | 0 | 7 | 3 | – |
| Missouri | 1 | 8 | 1 | 1.75″ |
| North Dakota | 4 | 3 | 3 | 1.75″ |
| Iowa | 1 | 8 | 0 | 1.75″ |
| Oklahoma | 1 | 7 | 1 | 0.75″ |
| Minnesota | 3 | 5 | 0 | 1.75″ |
| Arkansas | 0 | 6 | 1 | – |
| South Carolina | 0 | 6 | 0 | – |
| Colorado | 3 | 1 | 1 | 1.75″ |
| Georgia | 0 | 5 | 0 | – |
| Montana | 0 | 4 | 1 | – |
| Alabama | 1 | 2 | 1 | 0.75″ |
| Idaho | 1 | 3 | 0 | 1.00″ |
| Maine | 1 | 3 | 0 | 0.75″ |
| New Hampshire | 2 | 1 | 1 | 2.00″ |
| Ohio | 2 | 1 | 1 | 1.75″ |
| Wisconsin | 1 | 3 | 0 | 1.75″ |
| Tennessee | 0 | 3 | 0 | – |
| West Virginia | 0 | 2 | 1 | – |
| Indiana | 0 | 2 | 0 | – |
| Louisiana | 1 | 1 | 0 | 1.75″ |
| Mississippi | 0 | 1 | 1 | – |
| New Mexico | 1 | 1 | 0 | 1.75″ |
| South Dakota | 2 | 0 | 0 | 1.75″ |
| Virginia | 0 | 2 | 0 | – |
| Vermont | 0 | 1 | 1 | – |
| California | 0 | 1 | 0 | – |
| Connecticut | 0 | 1 | 0 | – |
| Delaware | 0 | 1 | 0 | – |
| Illinois | 0 | 1 | 0 | – |
| Maryland | 0 | 1 | 0 | – |
| Michigan | 1 | 0 | 0 | 1.00″ |
| New Jersey | 0 | 1 | 0 | – |
| Nevada | 1 | 0 | 0 | 1.50″ |
Every storm day in August 1970
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 23 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.