August 1999 storm reports: hail, wind and tornadoes
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In August 1999, 729 hail, 1,287 damaging-wind and 79 tornado reports were logged on 31 storm days across 47 states. The largest hail reported was 4.50″ (softball size) in Chase County, NE on August 17, 1999. The most hail reports came on August 20, 1999 (64). Tornadoes killed 1.
Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology
← July 1999 All 1999 storm days September 1999 →
Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.
Biggest storm days of August 1999
| Day | Hail | Wind | Tornado | Largest hail | States |
|---|---|---|---|---|---|
| Aug 13, 1999 | 42 | 163 | 2 | 1.75″ | 27 |
| Aug 14, 1999 | 25 | 150 | 6 | 2.75″ | 17 |
| Aug 19, 1999 | 52 | 105 | 2 | 2.00″ | 17 |
| Aug 12, 1999 | 31 | 109 | 5 | 2.00″ | 13 |
| Aug 20, 1999 | 64 | 58 | 2 | 3.50″ | 16 |
| Aug 11, 1999 | 56 | 57 | 5 | 2.00″ | 18 |
| Aug 26, 1999 | 29 | 75 | 3 | 1.75″ | 11 |
| Aug 17, 1999 | 36 | 56 | 8 | 4.50″ | 9 |
| Aug 15, 1999 | 59 | 20 | 10 | 3.00″ | 7 |
| Aug 23, 1999 | 16 | 60 | 2 | 1.00″ | 14 |
Largest hail reported in August 1999
| Day | Size | Location |
|---|---|---|
| Aug 17, 1999 | 4.50″ (softball) | Chase County, NE |
| Aug 20, 1999 | 3.50″ (teacup) | Spartanburg County, SC |
| Aug 15, 1999 | 3.00″ (teacup) | Stark County, ND |
| Aug 14, 1999 | 2.75″ (baseball) | Golden Valley County, MT |
| Aug 15, 1999 | 2.75″ (baseball) | Barnes County, ND |
| Aug 17, 1999 | 2.75″ (baseball) | Sedgwick County, CO |
| Aug 18, 1999 | 2.75″ (baseball) | Schuyler County, IL |
| Aug 22, 1999 | 2.75″ (baseball) | Dickey County, ND |
| Aug 10, 1999 | 2.50″ (tennis ball) | Logan County, KS |
| Aug 20, 1999 | 2.50″ (tennis ball) | Spartanburg County, SC |
Storm reports by state, August 1999
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| Georgia | 58 | 94 | 0 | 2.00″ |
| Nebraska | 42 | 59 | 4 | 4.50″ |
| Oklahoma | 23 | 81 | 1 | 1.75″ |
| North Dakota | 73 | 20 | 11 | 3.00″ |
| North Carolina | 35 | 61 | 1 | 1.75″ |
| South Carolina | 26 | 67 | 0 | 3.50″ |
| Virginia | 15 | 76 | 0 | 2.00″ |
| Montana | 68 | 14 | 7 | 2.75″ |
| Florida | 15 | 68 | 4 | 1.75″ |
| Kansas | 54 | 29 | 0 | 2.50″ |
| Arkansas | 16 | 64 | 0 | 1.75″ |
| Texas | 10 | 57 | 8 | 1.50″ |
| Minnesota | 48 | 9 | 12 | 2.00″ |
| Tennessee | 12 | 52 | 1 | 1.75″ |
| Pennsylvania | 5 | 56 | 1 | 1.75″ |
| Colorado | 29 | 17 | 11 | 2.75″ |
| Missouri | 5 | 51 | 0 | 1.75″ |
| South Dakota | 38 | 17 | 0 | 1.75″ |
| Illinois | 9 | 43 | 2 | 2.75″ |
| Alabama | 17 | 35 | 0 | 1.75″ |
| Kentucky | 10 | 32 | 1 | 2.00″ |
| Louisiana | 6 | 37 | 0 | 1.50″ |
| West Virginia | 5 | 36 | 0 | 1.00″ |
| Mississippi | 9 | 30 | 0 | 1.75″ |
| New York | 7 | 31 | 1 | 1.00″ |
| Arizona | 10 | 19 | 0 | 1.00″ |
| Ohio | 4 | 20 | 1 | 1.50″ |
| Wyoming | 13 | 9 | 3 | 2.00″ |
| Maryland | 0 | 22 | 2 | – |
| Oregon | 17 | 6 | 0 | 1.75″ |
| Iowa | 9 | 10 | 2 | 1.75″ |
| New Jersey | 1 | 16 | 1 | 1.25″ |
| Wisconsin | 10 | 5 | 1 | 2.00″ |
| New Hampshire | 1 | 9 | 1 | 1.00″ |
| Connecticut | 3 | 6 | 0 | 1.50″ |
| Massachusetts | 5 | 3 | 0 | 1.00″ |
| Nevada | 1 | 6 | 0 | 1.75″ |
| Utah | 3 | 3 | 1 | 1.50″ |
| Idaho | 4 | 2 | 0 | 1.00″ |
| Maine | 2 | 3 | 1 | 1.50″ |
| Michigan | 2 | 3 | 1 | 0.75″ |
| New Mexico | 5 | 1 | 0 | 1.75″ |
| California | 1 | 3 | 0 | 0.75″ |
| Indiana | 2 | 1 | 0 | 0.75″ |
| Vermont | 0 | 2 | 0 | – |
| Washington | 1 | 1 | 0 | 0.75″ |
| Delaware | 0 | 1 | 0 | – |
Every storm day in August 1999
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.