Alert archive / Illinois / LaSalle County / 2026
Weather alerts in LaSalle County, Illinois, August 2026
49 weather alerts in August 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 49
- Warnings
- 18
- Watches
- 8
- Advisories
- 14
- Busiest day
- August 10, 202616 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 9, 5:03 PM CDT | Flood Watch | LOT | 10 hr |
| Aug 9, 8:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 8:43 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 9, 10:16 PM CDT | Areal Flood Advisory | LOT | 78 min |
| Aug 9, 10:49 PM CDT | Areal Flood Advisory | LOT | 45 min |
| Aug 9, 10:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 11:22 PM CDT | Tornado Warning | LOT | 23 min |
| Aug 9, 11:23 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Aug 9, 11:32 PM CDT | Areal Flood Advisory | LOT | 2 hr |
| Aug 9, 11:35 PM CDT | Severe Thunderstorm Warning | LOT | 70 min |
| Aug 9, 11:36 PM CDT | Tornado Warning | LOT | 24 min |
| Aug 9, 11:47 PM CDT | Flash Flood Warning | LOT | 3 hr |
| Aug 9, 11:59 PM CDT | Tornado Warning | LOT | 17 min |
| Aug 10, 12:01 AM CDT | Flash Flood Warning | LOT | 2 hr |
| Aug 10, 1:05 AM CDT | Areal Flood Advisory | LOT | 8 hr |
| Aug 10, 2:32 AM CDT | Areal Flood Warning | LOT | 3 hr |
| Aug 10, 12:47 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 7:22 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 11, 9:00 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 9:22 AM CDT | Severe Thunderstorm Warning | LOT | 53 min |
| Aug 11, 9:32 AM CDT | Areal Flood Advisory | LOT | 4 hr |
| Aug 11, 9:48 AM CDT | Severe Thunderstorm Warning | LOT | 72 min |
| Aug 11, 8:04 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 6:41 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 12, 8:23 AM CDT | Severe Thunderstorm Warning | LOT | 66 min |
| Aug 12, 8:37 AM CDT | Tornado Warning | LOT | 38 min |
| Aug 12, 9:04 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 12, 9:06 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Aug 12, 9:37 AM CDT | Flash Flood Warning | LOT | 3 hr |
| Aug 12, 12:17 PM CDT | Areal Flood Advisory | LOT | 118 min |
| Aug 13, 2:08 AM CDT | Flood Watch | LOT | 32 hr |
| Aug 13, 2:42 AM CDT | Dense Fog Advisory | LOT | 6 hr |
| Aug 13, 11:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 13, 11:35 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Aug 14, 12:01 PM CDT | Flood Watch | LOT | 22 hr |
| Aug 14, 10:15 PM CDT | River Flood Warning | LOT | 5 days |
| Aug 15, 6:39 PM CDT | Flood Watch | LOT | 13 hr |
| Aug 21, 2:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Aug 21, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 21, 5:44 PM CDT | Severe Thunderstorm Warning | LOT | 46 min |
| Aug 21, 6:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 6:29 PM CDT | Severe Thunderstorm Warning | LOT | 17 min |
| Aug 21, 7:20 PM CDT | Severe Thunderstorm Warning | LOT | 40 min |
| Aug 21, 7:58 PM CDT | Areal Flood Advisory | LOT | 4 hr |
| Aug 21, 8:19 PM CDT | Flash Flood Warning | LOT | 4 hr |
| Aug 21, 9:10 PM CDT | Severe Thunderstorm Warning | LOT | 19 min |
| Aug 21, 11:58 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Aug 31, 12:24 PM CDT | Heat Advisory | LOT | 33 hr |
| Aug 31, 12:24 PM CDT | Heat Advisory | LOT | 3 days |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 8 |
| Tornado Warning | 4 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 9 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 4 |
| River Flood Warning | 1 |
| Flood Watch | 4 |
| Areal Flood Advisory | 11 |
| Heat | |
| Heat Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.