Alert archive / Illinois / Montgomery County
Weather alerts in Montgomery County, Illinois, 2026
87 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Montgomery County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 87
- Warnings
- 26
- Watches
- 14
- Advisories
- 19
- Busiest month
- April23 alerts
- Busiest day
- April 27, 202610 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Montgomery County in 2026 had a tornado report inside them; 0 of 6 tornado reports fell inside a warning.
Montgomery County, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 6 | 0% | |
| Severe thunderstorm warnings | 14 | 11 | 21% | 23 | 57% | 15 min |
| Flash flood warnings | 3 | 2 | 33% | 1 | 100% | 98 min |
Each office's whole area, 2026
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 80 | 18 | 78% | 57 | 61% | 20 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 258 | 110 | 57% | 561 | 76% | 21 min |
| NWS St. Louis, MO: flash flood warnings | 61 | 25 | 59% | 82 | 76% | 97 min |
An office's figures cover every county it serves, including across state lines.
The year is still running; reports filed late and damage surveys can still change these figures.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 |
|---|---|---|---|
| Jan 8, 7:40 PM CST | Severe Thunderstorm Warning | LSX | 39 min |
| Jan 8, 7:50 PM CST | Mesoscale Discussion | SPC | 55 min |
| Jan 8, 8:04 PM CST | Severe Thunderstorm Warning | LSX | 27 min |
| Jan 18, 1:59 AM CST | Cold Weather Advisory | LSX | 32 hr |
| Jan 22, 2:29 AM CST | Cold Weather Advisory | LSX | 58 hr |
| Jan 22, 1:15 PM CST | Winter Storm Watch | LSX | 13 hr |
| Jan 22, 1:15 PM CST | Winter Storm Warning | LSX | 3 days |
| Jan 24, 1:38 PM CST | Cold Weather Advisory | LSX | 46 hr |
| Jan 25, 1:55 AM CST | Extreme Cold Warning | LSX | 34 hr |
| Jan 26, 1:49 AM CST | Cold Weather Advisory | LSX | 25 hr |
| Jan 27, 2:27 PM CST | Cold Weather Advisory | LSX | 19 hr |
| Feb 19, 4:23 AM CST | Dense Fog Advisory | LSX | 5 hr |
| Feb 19, 11:34 AM CST | Mesoscale Discussion | SPC | 116 min |
| Mar 4, 8:42 PM CST | Dense Fog Advisory | LSX | 9 hr |
| Mar 6, 12:38 AM CST | Dense Fog Advisory | LSX | 5 hr |
| Mar 11, 1:59 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Mar 11, 3:57 AM CDT | Severe Thunderstorm Warning | LSX | 48 min |
| Mar 11, 4:23 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 12, 3:05 AM CDT | Wind Advisory | LSX | 30 hr |
| Mar 14, 10:45 AM CDT | Wind Advisory | LSX | 49 hr |
| Mar 15, 12:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 15, 1:33 PM CDT | Tornado Watch | SPC | 6 hr |
| Mar 15, 5:31 PM CDT | Severe Thunderstorm Warning | LSX | 44 min |
| Mar 26, 2:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Mar 27, 11:40 AM CDT | Freeze Warning | LSX | 21 hr |
| Mar 31, 2:44 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 2, 3:46 AM CDT | Wind Advisory | LSX | 15 hr |
| Apr 2, 5:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 14, 1:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 17, 7:57 AM CDT | Flood Watch | LSX | 19 hr |
| Apr 17, 3:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Apr 17, 3:31 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 17, 8:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 17, 8:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 27, 7:59 AM CDT | Severe Thunderstorm Warning | LSX | 33 min |
| Apr 27, 8:31 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 27, 10:29 AM CDT | Severe Thunderstorm Warning | LSX | 61 min |
| Apr 27, 10:31 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Apr 27, 10:52 AM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Apr 27, 11:18 AM CDT | Flood Watch | LSX | 10 hr |
| Apr 27, 12:50 PM CDT | Tornado Watch | SPC | 9 hr |
| Apr 27, 1:07 PM CDT | Flash Flood Warning | LSX | 7 hr |
| Apr 27, 3:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 27, 6:28 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Apr 27, 7:09 PM CDT | Severe Thunderstorm Warning | LSX | 51 min |
| Apr 27, 7:16 PM CDT | Flash Flood Warning | LSX | 5 hr |
| Apr 27, 7:22 PM CDT | Tornado Warning | LSX | 38 min |
| Apr 27, 8:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 28, 12:16 AM CDT | Areal Flood Warning | LSX | 6 hr |
| May 3, 2:36 PM CDT | Blowing Dust Advisory | LSX | 4 hr |
| May 3, 8:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 4, 6:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| May 4, 6:37 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| May 18, 8:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 1:26 PM CDT | Flood Watch | LSX | 40 hr |
| Jun 9, 12:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 10, 4:58 PM CDT | Severe Thunderstorm Warning | LSX | 18 min |
| Jun 16, 12:39 PM CDT | Wind Advisory | LSX | 31 hr |
| Jun 17, 7:49 AM CDT | Tornado Watch | SPC | 6 hr |
| Jun 17, 10:43 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 1:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 17, 2:14 PM CDT | Tornado Watch | SPC | 11 hr |
| Jun 17, 4:00 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 17, 6:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 17, 7:53 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| Jun 17, 8:09 PM CDT | Tornado Warning | LSX | 41 min |
| Jun 20, 1:28 AM CDT | Flood Watch | LSX | 45 hr |
| Jun 21, 10:06 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 21, 1:28 PM CDT | Tornado Watch | SPC | 9 hr |
| Jun 21, 3:26 PM CDT | Flash Flood Warning | LSX | 4 hr |
| Jun 24, 11:53 AM CDT | Flood Watch | LSX | 62 hr |
| Jun 27, 1:59 AM CDT | Heat Advisory | LSX | 71 hr |
| Jun 27, 1:15 PM CDT | Extreme Heat Warning | LSX | 7 days |
| Jul 2, 11:50 AM CDT | Heat Advisory | LSX | 54 hr |
| Jul 9, 3:00 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| Jul 10, 4:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 24, 1:12 AM CDT | Extreme Heat Watch | LSX | 11 hr |
| Jul 24, 12:15 PM CDT | Heat Advisory | LSX | 47 hr |
| Jul 26, 12:40 AM CDT | Extreme Heat Warning | LSX | 66 hr |
| Jul 26, 1:52 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 1:05 AM CDT | Heat Advisory | LSX | 8 days |
| Aug 22, 2:38 AM CDT | Severe Thunderstorm Warning | LSX | 67 min |
| Aug 30, 12:27 PM CDT | Heat Advisory | LSX | 3 days |
| Sep 3, 12:12 AM CDT | Extreme Heat Warning | LSX | 68 hr |
| Sep 14, 11:30 AM CDT | Heat Advisory | LSX | 5 days |
| Sep 15, 2:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 20, 6:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
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 | 14 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 28 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 3 |
| Flood Watch | 5 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Heat | |
| Extreme Heat Warning | 3 |
| Extreme Heat Watch | 1 |
| Heat Advisory | 6 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 1 |
| Cold Weather Advisory | 5 |
| Wind and dust | |
| Blowing Dust Advisory | 1 |
| Wind Advisory | 4 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
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.