Alert archive / Illinois / Mason County
Weather alerts in Mason County, Illinois, 2024
126 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Mason County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 126
- Warnings
- 39
- Watches
- 23
- Advisories
- 25
- Busiest month
- July31 alerts
- Busiest day
- July 16, 202410 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 Mason County in 2024 had a tornado report inside them.
Mason County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 22 | 8 | 64% | 7 | 86% | 17 min |
| Flash flood warnings | 4 | 2 | 50% | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Lincoln, IL: tornado warnings | 35 | 2 | 94% | 31 | 16% | 22 min |
| NWS Lincoln, IL: severe thunderstorm warnings | 218 | 93 | 57% | 459 | 75% | 22 min |
| NWS Lincoln, IL: flash flood warnings | 26 | 7 | 73% | 26 | 81% | 118 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, 2:58 AM CST | Winter Storm Watch | ILX | 24 hr |
| Jan 8, 2:39 AM CST | Winter Weather Advisory | ILX | 48 hr |
| Jan 11, 2:52 AM CST | Winter Weather Advisory | ILX | 48 hr |
| Jan 12, 2:27 PM CST | Wind Chill Watch | ILX | 23 hr |
| Jan 13, 2:55 AM CST | Wind Chill Warning | ILX | 3 days |
| Jan 13, 2:55 AM CST | Wind Chill Advisory | ILX | 4 days |
| Jan 18, 2:25 AM CST | Winter Weather Advisory | ILX | 28 hr |
| Jan 18, 2:23 PM CST | Wind Chill Advisory | ILX | 46 hr |
| Jan 20, 2:44 AM CST | Wind Chill Advisory | ILX | 31 hr |
| Jan 21, 3:00 AM CST | Winter Weather Advisory | ILX | 54 hr |
| Jan 22, 3:27 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Jan 23, 2:26 PM CST | Dense Fog Advisory | ILX | 70 hr |
| Jan 24, 6:58 AM CST | River Flood Warning | ILX | 26 days |
| Jan 24, 7:38 PM CST | River Flood Warning | ILX | 6 days |
| Jan 25, 10:00 AM CST | River Flood Warning | ILX | 45 hr |
| Jan 26, 1:24 PM CST | Dense Fog Advisory | ILX | 26 hr |
| Feb 6, 4:05 AM CST | Dense Fog Advisory | ILX | 9 hr |
| Feb 6, 9:26 PM CST | Dense Fog Advisory | ILX | 10 hr |
| Feb 15, 1:32 PM CST | Winter Weather Advisory | ILX | 28 hr |
| Feb 25, 1:25 PM CST | Fire Weather Watch | ILX | 13 hr |
| Feb 26, 2:03 AM CST | Red Flag Warning | ILX | 16 hr |
| Mar 3, 2:29 PM CST | Wind Advisory | ILX | 4 hr |
| Mar 14, 3:15 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 14, 5:22 AM CDT | Severe Thunderstorm Warning | ILX | 23 min |
| Mar 14, 5:35 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Mar 14, 11:13 AM CDT | River Flood Warning | ILX | 12 hr |
| Mar 14, 1:33 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 14, 3:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Mar 24, 2:00 PM CDT | Wind Advisory | ILX | 34 hr |
| Mar 31, 5:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 6:00 PM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Mar 31, 6:28 PM CDT | Severe Thunderstorm Warning | ILX | 32 min |
| Apr 1, 10:24 AM CDT | Flood Watch | ILX | 20 hr |
| Apr 1, 12:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Apr 3, 1:56 AM CDT | Wind Advisory | ILX | 17 hr |
| Apr 3, 12:00 PM CDT | River Flood Warning | ILX | 55 days |
| Apr 5, 2:13 AM CDT | Freeze Warning | ILX | 30 hr |
| Apr 16, 12:06 PM CDT | Tornado Watch | SPC | 10 hr |
| Apr 16, 1:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 16, 7:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 20, 2:25 PM CDT | Freeze Warning | ILX | 18 hr |
| Apr 21, 2:32 AM CDT | Frost Advisory | ILX | 29 hr |
| Apr 27, 2:04 PM CDT | Flood Watch | ILX | 16 hr |
| Apr 27, 7:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Apr 27, 9:15 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Apr 27, 9:41 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 29, 7:51 PM CDT | River Flood Warning | ILX | 38 hr |
| May 2, 7:11 PM CDT | Special Weather Statement | ILX | 34 min |
| May 4, 1:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 4, 4:36 PM CDT | Severe Thunderstorm Warning | ILX | 24 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, 4:50 AM CDT | Severe Thunderstorm Warning | ILX | 40 min |
| May 17, 2:42 AM CDT | Dense Fog Advisory | ILX | 6 hr |
| May 19, 3:42 PM CDT | Special Weather Statement | ILX | 18 min |
| May 21, 5:56 PM CDT | Tornado Watch | SPC | 6 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, 8:21 PM CDT | Severe Thunderstorm Warning | ILX | 39 min |
| May 27, 5:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 9:17 PM CDT | Special Weather Statement | ILX | 13 min |
| May 27, 9:27 PM CDT | Special Weather Statement | ILX | 18 min |
| May 27, 9:41 PM CDT | Special Weather Statement | ILX | 19 min |
| Jun 13, 2:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 13, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 13, 6:16 PM CDT | Severe Thunderstorm Warning | ILX | 44 min |
| Jun 13, 6:57 PM CDT | Severe Thunderstorm Warning | ILX | 48 min |
| Jun 13, 7:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 22, 6:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 7:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 25, 10:55 AM CDT | Severe Thunderstorm Warning | ILX | 18 min |
| Jun 25, 11:26 AM CDT | Severe Thunderstorm Warning | ILX | 34 min |
| Jun 25, 11:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 25, 11:57 AM CDT | Special Weather Statement | ILX | 33 min |
| Jun 25, 12:01 PM CDT | Severe Thunderstorm Warning | ILX | 29 min |
| Jun 25, 12:06 PM CDT | Severe Thunderstorm Warning | ILX | 13 min |
| Jun 25, 9:15 PM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Jun 25, 10:01 PM CDT | Special Weather Statement | ILX | 29 min |
| Jul 2, 6:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 10:35 PM CDT | Severe Thunderstorm Warning | ILX | 14 min |
| Jul 13, 2:51 PM CDT | Heat Advisory | ILX | 53 hr |
| Jul 15, 12:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 1:28 AM CDT | Tornado Warning | ILX | 7 min |
| Jul 15, 2:47 PM CDT | Flood Watch | ILX | 16 hr |
| Jul 15, 3:18 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 15, 6:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 15, 6:53 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 15, 8:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 8:27 PM CDT | Severe Thunderstorm Warning | ILX | 63 min |
| Jul 15, 8:37 PM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Jul 15, 9:20 PM CDT | Special Weather Statement | ILX | 40 min |
| Jul 15, 10:33 PM CDT | Flash Flood Warning | ILX | 3 hr |
| Jul 15, 10:36 PM CDT | Special Weather Statement | ILX | 24 min |
| Jul 15, 11:08 PM CDT | Flash Flood Warning | ILX | 5 hr |
| Jul 15, 11:12 PM CDT | Special Weather Statement | ILX | 18 min |
| Jul 16, 1:05 AM CDT | Flash Flood Warning | ILX | 3 hr |
| Jul 16, 1:27 AM CDT | Flash Flood Warning | ILX | 8 hr |
| Jul 24, 1:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 29, 1:29 AM CDT | Flood Watch | ILX | 6 hr |
| Jul 30, 12:53 AM CDT | Dense Fog Advisory | ILX | 7 hr |
| Jul 30, 5:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 30, 6:14 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 30, 6:40 AM CDT | Severe Thunderstorm Warning | ILX | 35 min |
| Jul 30, 7:02 AM CDT | Severe Thunderstorm Warning | ILX | 43 min |
| Jul 30, 1:34 PM CDT | Special Weather Statement | ILX | 26 min |
| Jul 31, 5:30 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 5:50 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 31, 6:45 AM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Jul 31, 7:29 AM CDT | Severe Thunderstorm Warning | ILX | 35 min |
| Aug 1, 2:18 AM CDT | Special Weather Statement | ILX | 27 min |
| Aug 1, 2:45 AM CDT | Severe Thunderstorm Warning | ILX | 45 min |
| Aug 1, 3:07 AM CDT | Severe Thunderstorm Warning | ILX | 38 min |
| Aug 15, 9:08 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 15, 11:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 16, 1:12 AM CDT | Special Weather Statement | ILX | 18 min |
| Aug 16, 1:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 25, 2:27 AM CDT | Excessive Heat Watch | ILX | 35 hr |
| Aug 25, 2:27 AM CDT | Heat Advisory | ILX | 42 hr |
| Aug 26, 1:55 PM CDT | Excessive Heat Warning | ILX | 30 hr |
| Oct 14, 1:55 PM CDT | Freeze Warning | ILX | 42 hr |
| Oct 28, 2:41 PM CDT | Fire Weather Watch | ILX | 12 hr |
| Nov 18, 3:32 AM CST | Wind Advisory | ILX | 26 hr |
| Nov 21, 3:02 AM CST | Wind Advisory | ILX | 18 hr |
| Dec 4, 2:18 AM CST | Wind Advisory | ILX | 23 hr |
| Dec 15, 12:09 AM CST | Dense Fog Advisory | ILX | 11 hr |
| Dec 28, 5:52 AM CST | Dense Fog Advisory | ILX | 3 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 | 22 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 13 |
| Flooding | |
| Flash Flood Warning | 4 |
| River Flood Warning | 6 |
| Flood Watch | 4 |
| Winter | |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 6 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
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.