Alert archive / Illinois / Montgomery County
Weather alerts in Montgomery County, Illinois, 2024
95 weather alerts in 2024, 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 2024. Tap one for its archive.
- Alerts
- 95
- Warnings
- 29
- Watches
- 18
- Advisories
- 21
- Busiest month
- April21 alerts
- Busiest day
- March 14, 202415 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 6 tornado warnings covering Montgomery County in 2024 had a tornado report inside them.
Montgomery County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 1 | 83% | 0 | ||
| Severe thunderstorm warnings | 15 | 8 | 47% | 7 | 71% | 26 min |
| Flash flood warnings | 4 | 1 | 75% | 1 | 100% | 118 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 80 | 25 | 69% | 57 | 56% | 14 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 378 | 178 | 53% | 985 | 64% | 24 min |
| NWS St. Louis, MO: flash flood warnings | 59 | 32 | 46% | 123 | 85% | 86 min |
An office's figures cover every county it serves, including across state lines.
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 11, 12:56 PM CST | Wind Advisory | LSX | 38 hr |
| Jan 12, 2:57 AM CST | Wind Chill Warning | LSX | 4 days |
| Jan 12, 2:07 PM CST | Wind Chill Advisory | LSX | 5 days |
| Jan 18, 2:48 AM CST | Wind Chill Advisory | LSX | 57 hr |
| Jan 21, 1:53 AM CST | Winter Weather Advisory | LSX | 43 hr |
| Jan 22, 3:27 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 23, 4:12 PM CST | Dense Fog Advisory | LSX | 67 hr |
| Feb 15, 1:06 PM CST | Winter Weather Advisory | LSX | 28 hr |
| Feb 27, 5:47 PM CST | Mesoscale Discussion | SPC | 88 min |
| Mar 14, 4:41 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 14, 7:25 AM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Mar 14, 7:39 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 14, 7:59 AM CDT | Tornado Warning | LSX | 30 min |
| Mar 14, 8:10 AM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Mar 14, 8:15 AM CDT | Tornado Warning | LSX | 11 min |
| Mar 14, 12:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Mar 14, 1:33 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 14, 3:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Mar 14, 4:47 PM CDT | Tornado Warning | LSX | 27 min |
| Mar 14, 5:07 PM CDT | Severe Thunderstorm Warning | LSX | 53 min |
| Mar 14, 5:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Mar 14, 5:10 PM CDT | Severe Thunderstorm Warning | LSX | 65 min |
| Mar 14, 5:44 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| Mar 14, 6:08 PM CDT | Severe Thunderstorm Warning | LSX | 18 min |
| Mar 24, 2:18 PM CDT | Wind Advisory | LSX | 29 hr |
| Mar 31, 5:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 1, 11:14 AM CDT | Flood Watch | LSX | 17 hr |
| Apr 1, 12:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 1, 3:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 1, 4:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 1, 6:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Apr 1, 10:37 PM CDT | Tornado Watch | SPC | 4 hr |
| Apr 2, 1:27 AM CDT | Flash Flood Warning | LSX | 6 hr |
| Apr 5, 2:33 AM CDT | Freeze Warning | LSX | 29 hr |
| Apr 16, 2:48 PM CDT | Wind Advisory | LSX | 6 hr |
| Apr 16, 3:21 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 18, 12:08 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 12:56 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 18, 3:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 18, 5:45 PM CDT | Tornado Warning | LSX | 45 min |
| Apr 18, 6:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 18, 6:14 PM CDT | Tornado Warning | LSX | 46 min |
| Apr 18, 7:01 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Apr 20, 2:24 PM CDT | Frost Advisory | LSX | 18 hr |
| Apr 21, 1:54 PM CDT | Frost Advisory | LSX | 18 hr |
| Apr 23, 11:49 PM CDT | Dense Fog Advisory | LSX | 4 hr |
| Apr 27, 9:41 PM CDT | Tornado Watch | SPC | 6 hr |
| May 4, 1:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 7, 12:53 AM CDT | Tornado Watch | SPC | 7 hr |
| May 7, 4:42 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 7, 5:03 AM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| May 8, 5:28 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| May 24, 1:13 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| May 24, 1:22 PM CDT | Tornado Warning | LSX | 23 min |
| May 24, 1:39 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 1:47 PM CDT | Flash Flood Warning | LSX | 8 hr |
| May 24, 2:39 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| May 24, 3:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 24, 4:25 PM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| May 24, 5:36 PM CDT | Severe Thunderstorm Warning | LSX | 39 min |
| May 24, 6:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 25, 2:06 PM CDT | Flood Watch | LSX | 32 hr |
| May 26, 5:03 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| May 26, 5:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 13, 7:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 13, 8:12 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 11:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 25, 12:10 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 29, 11:42 AM CDT | Mesoscale Discussion | SPC | 63 min |
| Jul 8, 2:37 AM CDT | Flood Watch | LSX | 48 hr |
| Jul 9, 3:13 PM CDT | Areal Flood Advisory | LSX | 7 hr |
| Jul 13, 2:29 PM CDT | Heat Advisory | LSX | 68 hr |
| Jul 15, 9:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 16, 2:17 AM CDT | Flood Watch | LSX | 29 hr |
| Jul 16, 4:28 AM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jul 16, 4:51 AM CDT | Flash Flood Warning | LSX | 3 hr |
| Jul 28, 3:27 AM CDT | Heat Advisory | LSX | 5 days |
| Jul 29, 7:41 PM CDT | Severe Thunderstorm Warning | LSX | 49 min |
| Jul 29, 7:48 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 30, 9:09 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 1:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 30, 4:20 PM CDT | Severe Thunderstorm Warning | LSX | 55 min |
| Jul 30, 4:24 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Jul 31, 5:50 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 1, 2:19 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 25, 2:17 PM CDT | Heat Advisory | LSX | 5 days |
| Aug 30, 3:24 PM CDT | Severe Thunderstorm Warning | LSX | 45 min |
| Aug 30, 3:41 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 30, 5:06 PM CDT | Flash Flood Warning | LSX | 94 min |
| Sep 27, 3:05 AM CDT | Wind Advisory | LSX | 22 hr |
| Oct 14, 2:13 PM CDT | Freeze Warning | LSX | 43 hr |
| Oct 16, 9:51 AM CDT | Freeze Warning | LSX | 23 hr |
| Nov 29, 2:20 PM CST | Winter Weather Advisory | LSX | 32 hr |
| Dec 28, 2:15 AM CST | Dense Fog Advisory | LSX | 11 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 | 15 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 27 |
| Flooding | |
| Flash Flood Warning | 4 |
| Flood Watch | 4 |
| Areal Flood Advisory | 4 |
| Winter | |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| 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 archive20232025
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.