Alert archive / Illinois / Montgomery County
Weather alerts in Montgomery County, Illinois, 2022
92 weather alerts in 2022, 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 2022. Tap one for its archive.
- Alerts
- 92
- Warnings
- 28
- Watches
- 17
- Advisories
- 23
- Busiest month
- August18 alerts
- Busiest day
- August 3, 20229 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 1 tornado warnings covering Montgomery County in 2022 had a tornado report inside them.
Montgomery County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 16 | 8 | 50% | 20 | 90% | 15 min |
| Flash flood warnings | 3 | 3 | 0% | 3 | 100% | 59 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 10 | 2 | 80% | 10 | 50% | 9 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 173 | 88 | 49% | 343 | 81% | 21 min |
| NWS St. Louis, MO: flash flood warnings | 40 | 20 | 50% | 95 | 91% | 130 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 7, 5:52 PM CST | Winter Weather Advisory | LSX | 27 hr |
| Jan 14, 2:58 AM CST | Winter Weather Advisory | LSX | 39 hr |
| Jan 31, 2:49 AM CST | Winter Storm Watch | LSX | 24 hr |
| Feb 1, 2:41 AM CST | Winter Storm Warning | LSX | 69 hr |
| Feb 2, 1:44 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 2, 7:11 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 15, 2:48 PM CST | Flood Watch | LSX | 48 hr |
| Feb 16, 1:38 PM CST | Winter Weather Advisory | LSX | 30 hr |
| Feb 22, 2:21 PM CST | Winter Weather Advisory | LSX | 58 hr |
| Mar 5, 10:32 PM CST | Severe Thunderstorm Warning | LSX | 43 min |
| Mar 5, 11:24 PM CST | Severe Thunderstorm Warning | LSX | 27 min |
| Mar 9, 2:21 PM CST | Winter Weather Advisory | LSX | 52 hr |
| Mar 29, 2:17 PM CDT | Wind Advisory | LSX | 24 hr |
| Mar 30, 9:03 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 8, 3:35 AM CDT | Freeze Warning | LSX | 28 hr |
| Apr 17, 2:27 PM CDT | Freeze Watch | LSX | 13 hr |
| Apr 18, 3:12 AM CDT | Freeze Warning | LSX | 30 hr |
| Apr 24, 10:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 12:29 PM CDT | Severe Thunderstorm Warning | LSX | 16 min |
| Apr 24, 12:46 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 24, 2:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 25, 2:40 AM CDT | Frost Advisory | LSX | 29 hr |
| Apr 26, 5:03 PM CDT | Frost Advisory | LSX | 13 hr |
| Apr 30, 2:03 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 30, 6:13 PM CDT | Severe Thunderstorm Warning | LSX | 17 min |
| Apr 30, 6:43 PM CDT | Severe Thunderstorm Warning | LSX | 32 min |
| May 15, 2:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| May 19, 10:05 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 19, 1:03 PM CDT | Severe Thunderstorm Warning | LSX | 42 min |
| May 19, 6:17 PM CDT | Severe Thunderstorm Warning | LSX | 26 min |
| May 19, 6:28 PM CDT | Tornado Warning | LSX | 24 min |
| May 26, 9:52 AM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 12, 10:14 AM CDT | Severe Thunderstorm Warning | LSX | 46 min |
| Jun 12, 10:15 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 10:43 AM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Jun 12, 2:52 PM CDT | Heat Advisory | LSX | 5 days |
| Jun 13, 2:58 AM CDT | Excessive Heat Warning | LSX | 4 days |
| Jun 17, 1:42 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 17, 3:29 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 5:10 AM CDT | Severe Thunderstorm Warning | LSX | 50 min |
| Jun 17, 5:38 AM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 25, 5:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 25, 7:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 25, 9:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 25, 10:40 PM CDT | Severe Thunderstorm Warning | LSX | 35 min |
| Jun 25, 11:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Jul 3, 1:08 PM CDT | Heat Advisory | LSX | 72 hr |
| Jul 8, 4:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 8:05 PM CDT | Severe Thunderstorm Warning | LSX | 40 min |
| Jul 21, 2:02 PM CDT | Heat Advisory | LSX | 3 days |
| Jul 25, 2:59 AM CDT | Flood Watch | LSX | 30 hr |
| Jul 26, 3:15 AM CDT | Flash Flood Warning | LSX | 6 hr |
| Jul 26, 6:41 AM CDT | Flash Flood Warning | LSX | 3 hr |
| Aug 1, 3:24 AM CDT | Heat Advisory | LSX | 64 hr |
| Aug 2, 3:00 PM CDT | Heat Advisory | LSX | 28 hr |
| Aug 3, 1:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 3, 1:45 PM CDT | Flood Watch | LSX | 20 hr |
| Aug 3, 1:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 3, 3:13 PM CDT | Severe Thunderstorm Warning | LSX | 47 min |
| Aug 3, 3:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Aug 3, 4:42 PM CDT | Severe Thunderstorm Warning | LSX | 36 min |
| Aug 3, 5:15 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Aug 3, 5:34 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| Aug 3, 5:54 PM CDT | Areal Flood Advisory | LSX | 3 hr |
| Aug 8, 9:58 AM CDT | Flood Watch | LSX | 18 hr |
| Aug 20, 12:51 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 20, 2:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 29, 4:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 29, 6:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 8:31 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 4, 8:17 AM CDT | Areal Flood Advisory | LSX | 51 min |
| Sep 4, 9:06 AM CDT | Flash Flood Warning | LSX | 5 hr |
| Sep 18, 9:28 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 18, 11:28 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 19, 1:47 AM CDT | Severe Thunderstorm Warning | LSX | 43 min |
| Sep 19, 1:58 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Oct 7, 2:42 AM CDT | Frost Advisory | LSX | 30 hr |
| Oct 8, 2:54 AM CDT | Frost Advisory | LSX | 29 hr |
| Oct 13, 3:15 PM CDT | Red Flag Warning | LSX | 29 hr |
| Oct 16, 2:44 AM CDT | Freeze Watch | LSX | 12 hr |
| Oct 16, 2:23 PM CDT | Freeze Warning | LSX | 43 hr |
| Oct 31, 8:28 PM CDT | Dense Fog Advisory | LSX | 13 hr |
| Nov 3, 2:08 PM CDT | Wind Advisory | LSX | 45 hr |
| Dec 1, 1:50 PM CST | Wind Advisory | LSX | 37 hr |
| Dec 6, 3:15 AM CST | Dense Fog Advisory | LSX | 7 hr |
| Dec 19, 3:48 PM CST | Winter Storm Watch | LSX | 36 hr |
| Dec 20, 2:54 AM CST | Wind Chill Watch | LSX | 25 hr |
| Dec 21, 3:30 AM CST | Wind Chill Warning | LSX | 71 hr |
| Dec 21, 3:30 AM CST | Winter Storm Warning | LSX | 41 hr |
| Dec 22, 10:59 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 22, 2:55 PM CST | Wind Chill Advisory | LSX | 42 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 | 16 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 24 |
| Flooding | |
| Flash Flood Warning | 3 |
| Flood Watch | 4 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Freeze Watch | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 4 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.