Illinois, 1999
The year's recorded storm events, federal disaster declarations and flood insurance claims.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders.
Events by hazard
Includes events recorded by forecast zone. The state's yearly total for 1999 was 1,348 against 1,589 in 1998.
Counties with the most recorded events
Notable events
| Date | County | Event type | Magnitude | Property damage | Deaths | Injuries |
|---|---|---|---|---|---|---|
| 28 Jul 1999 | Cook | Heat | — | — | 93 | — |
| 21 Jul 1999 | Cook | Heat | — | — | 12 | — |
| 18 Jul 1999 | St. Clair | Heat | — | — | 7 | 100 |
| 3 Jun 1999 | Cook | Heat | — | — | 4 | — |
| 28 Jul 1999 | Will | Heat | — | — | 3 | — |
| 28 Jul 1999 | Lake | Heat | — | — | 3 | — |
| 5 Jun 1999 | Winnebago | Heat | — | — | 2 | — |
| 10 Jun 1999 | Rock Island | Lightning | — | — | 2 | — |
| 18 Jul 1999 | Wayne | Heat | — | — | 2 | — |
| 20 Jul 1999 | Logan | Heat | — | — | 2 | — |
| 18 Jul 1999 | Madison | Heat | — | — | 1 | 10 |
| 8 Apr 1999 | Cass | Tornado | F1 | $1,750,000 | 1 | 6 |
| 1 Jun 1999 | Montgomery | Tornado | F3 | — | 1 | 4 |
| 8 Apr 1999 | Piatt | Tornado | F1 | $150,000 | 1 | 3 |
| 1 Jan 1999 | Moultrie | Heavy Snow | — | — | 1 | 1 |
| 21 Jul 1999 | Kane | Heat | — | — | 1 | — |
| 16 Aug 1999 | Will | Heat | — | — | 1 | — |
| 16 Aug 1999 | Cook | Heat | — | — | 1 | — |
| 19 Jul 1999 | Henry | Heat | — | — | 1 | — |
| 18 Jul 1999 | Massac | Heat | — | — | 1 | — |
| 18 Jul 1999 | Gallatin | Heat | — | — | 1 | — |
| 28 Jul 1999 | Vermilion | Heat | — | — | 1 | — |
| 1 Jan 1999 | Cook | Heavy Snow | — | — | 1 | — |
| 10 Jan 1999 | Cook | Cold/Wind Chill | — | — | 1 | — |
| 3 Apr 1999 | Rock Island | Flood | — | — | 1 | — |
| 20 Jul 1999 | Sangamon | Heat | — | — | 1 | — |
| 20 Jul 1999 | Peoria | Heat | — | — | 1 | — |
| 17 May 1999 | Lake | Thunderstorm Wind | 58 mph | — | — | 7 |
| 11 Feb 1999 | Tazewell | Thunderstorm Wind | 59 mph | $40,000 | — | 6 |
| 18 Jul 1999 | Monroe | Heat | — | — | — | 6 |
| 17 May 1999 | LaSalle | Lightning | — | — | — | 5 |
| 1 Jun 1999 | Shelby | Tornado | F2 | $2,000,000 | — | 4 |
| 5 May 1999 | Marion | Tornado | F1 | — | — | 4 |
| 8 Mar 1999 | Logan | Heavy Snow | — | — | — | 3 |
| 8 Apr 1999 | Douglas | Thunderstorm Wind | — | — | — | 3 |
| 4 Jun 1999 | Logan | Tornado | F0 | — | — | 2 |
| 11 Feb 1999 | Jo Daviess | Thunderstorm Wind | 67 mph | — | — | 2 |
| 18 Jul 1999 | Clinton | Heat | — | — | — | 2 |
| 11 Jun 1999 | Cook | Lightning | — | — | — | 2 |
| 8 Apr 1999 | Hancock | Tornado | F3 | $15,000,000 | — | — |
Up to 40 events with deaths, injuries, damage of $50,000 or more, or a tornado rating, ranked by deaths, injuries and damage.
Federal disaster declarations in 1999
| Declared | Number | Type | Incident | Title | Counties |
|---|---|---|---|---|---|
| 28 May 1999 | DR-1278 | Major disaster | Severe Storm | Severe Storms And Flash Flooding | 1 |
| 8 Jan 1999 | EM-3134 | Emergency | Snowstorm | Il-Winter Storm 1/1/99 | 52 |
Flood insurance claims with a 1999 date of loss
337 NFIP claims, 188 of them paid, for $1,531,376.
Sources: NOAA NCEI Storm Events through 30 Jun 2026; OpenFEMA DisasterDeclarationsSummaries v2 (29 Sep 2026); OpenFEMA NfipClaims v3 (8 Sep 2026). Built 30 Sep 2026.