September 1999 storm reports: hail, wind and tornadoes
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In September 1999, 425 hail, 428 damaging-wind and 54 tornado reports were logged on 25 storm days across 39 states. The largest hail reported was 2.75″ (baseball size) in Okfuskee County, OK on September 10, 1999. The most hail reports came on September 7, 1999 (107).
Source: NOAA Storm Prediction Center storm reports. Data through November 6, 2026. Methodology
← August 1999 All 1999 storm days October 1999 →
Source: National Storms (nationalstorms.com), CC BY 4.0, data from NOAA Storm Prediction Center storm reports.
Biggest storm days of September 1999
| Day | Hail | Wind | Tornado | Largest hail | States |
|---|---|---|---|---|---|
| Sep 7, 1999 | 107 | 82 | 3 | 2.50″ | 16 |
| Sep 29, 1999 | 2 | 92 | 7 | 0.88″ | 10 |
| Sep 11, 1999 | 47 | 29 | 1 | 2.00″ | 7 |
| Sep 10, 1999 | 28 | 46 | 2 | 2.75″ | 5 |
| Sep 15, 1999 | 16 | 19 | 17 | 2.75″ | 7 |
| Sep 3, 1999 | 30 | 15 | 6 | 2.00″ | 11 |
| Sep 14, 1999 | 25 | 10 | 4 | 2.00″ | 6 |
| Sep 1, 1999 | 18 | 10 | 5 | 1.75″ | 6 |
| Sep 19, 1999 | 21 | 9 | 1 | 1.75″ | 5 |
| Sep 9, 1999 | 5 | 23 | 0 | 0.88″ | 8 |
Largest hail reported in September 1999
| Day | Size | Location |
|---|---|---|
| Sep 10, 1999 | 2.75″ (baseball) | Okfuskee County, OK |
| Sep 15, 1999 | 2.75″ (baseball) | Yavapai County, AZ |
| Sep 24, 1999 | 2.75″ (baseball) | Shackelford County, TX |
| Sep 7, 1999 | 2.50″ (tennis ball) | Sedgwick County, KS |
| Sep 10, 1999 | 2.50″ (tennis ball) | Creek County, OK |
| Sep 15, 1999 | 2.25″ (hen egg) | Lynn County, TX |
| Sep 3, 1999 | 2.00″ (hen egg) | Furnas County, NE |
| Sep 7, 1999 | 2.00″ (hen egg) | Osage County, OK |
| Sep 7, 1999 | 2.00″ (hen egg) | Jewell County, KS |
| Sep 11, 1999 | 2.00″ (hen egg) | Stevens County, KS |
Storm reports by state, September 1999
| State | Hail | Wind | Tornado | Largest hail |
|---|---|---|---|---|
| Oklahoma | 80 | 97 | 2 | 2.75″ |
| Kansas | 94 | 32 | 2 | 2.50″ |
| Texas | 47 | 21 | 0 | 2.75″ |
| Virginia | 4 | 39 | 3 | 0.88″ |
| Arizona | 29 | 11 | 4 | 2.75″ |
| Pennsylvania | 2 | 38 | 0 | 0.88″ |
| Nebraska | 21 | 10 | 5 | 2.00″ |
| Colorado | 27 | 3 | 4 | 1.75″ |
| North Carolina | 2 | 11 | 21 | 1.75″ |
| South Carolina | 6 | 20 | 1 | 1.75″ |
| Georgia | 12 | 13 | 0 | 1.75″ |
| Iowa | 21 | 3 | 1 | 1.75″ |
| Minnesota | 22 | 1 | 0 | 1.75″ |
| Indiana | 4 | 16 | 1 | 1.75″ |
| Ohio | 3 | 16 | 0 | 0.88″ |
| Louisiana | 4 | 12 | 1 | 0.88″ |
| Florida | 1 | 10 | 5 | 0.75″ |
| Maryland | 0 | 16 | 0 | – |
| Wyoming | 10 | 3 | 3 | 1.75″ |
| Arkansas | 3 | 10 | 0 | 1.00″ |
| New Mexico | 9 | 4 | 0 | 1.75″ |
| South Dakota | 9 | 2 | 0 | 1.75″ |
| Alabama | 0 | 7 | 0 | – |
| Missouri | 3 | 4 | 0 | 1.00″ |
| Mississippi | 0 | 7 | 0 | – |
| Wisconsin | 5 | 2 | 0 | 1.75″ |
| West Virginia | 0 | 5 | 0 | – |
| Montana | 1 | 3 | 0 | 1.00″ |
| Nevada | 1 | 3 | 0 | 0.88″ |
| Michigan | 1 | 2 | 0 | 1.00″ |
| Utah | 2 | 0 | 1 | 1.75″ |
| New Jersey | 0 | 2 | 0 | – |
| California | 1 | 0 | 0 | 2.00″ |
| District of Columbia | 0 | 1 | 0 | – |
| Idaho | 0 | 1 | 0 | – |
| Illinois | 0 | 1 | 0 | – |
| Kentucky | 0 | 1 | 0 | – |
| North Dakota | 1 | 0 | 0 | 0.75″ |
| Tennessee | 0 | 1 | 0 | – |
Every storm day in September 1999
Sep 1 Sep 2 Sep 3 Sep 4 Sep 5 Sep 6 Sep 7 Sep 8 Sep 9 Sep 10 Sep 11 Sep 12 Sep 13 Sep 14 Sep 15 Sep 16 Sep 18 Sep 19 Sep 20 Sep 21 Sep 24 Sep 25 Sep 26 Sep 28 Sep 29
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.