Weather alerts in Mason County, Illinois, 2026

183 weather alerts in 2026, 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 2026. Tap one for its archive.

Alerts: 183
Warnings: 79
Watches: 27
Advisories: 36
Busiest month: June50 alerts
Busiest day: June 11, 202618 alerts

Over time

By month

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, 2:35 AM CST	Dense Fog Advisory	ILX	9 hr
Jan 18, 2:07 AM CST	Cold Weather Advisory	ILX	34 hr
Jan 22, 2:19 AM CST	Cold Weather Advisory	ILX	58 hr
Jan 23, 2:27 AM CST	Winter Weather Advisory	ILX	61 hr
Jan 24, 1:47 PM CST	Cold Weather Advisory	ILX	46 hr
Feb 15, 7:22 AM CST	Dense Fog Advisory	ILX	3 hr
Feb 15, 6:48 PM CST	Dense Fog Advisory	ILX	15 hr
Feb 17, 1:40 PM CST	Wind Advisory	ILX	11 hr
Feb 18, 12:18 AM CST	Red Flag Warning	ILX	17 hr
Feb 19, 1:51 PM CST	Wind Advisory	ILX	19 hr
Feb 19, 6:30 PM CST	Severe Thunderstorm Warning	ILX	45 min
Feb 19, 6:58 PM CST	Severe Thunderstorm Warning	ILX	47 min
Feb 26, 1:51 PM CST	Fire Weather Watch	ILX	12 hr
Feb 27, 1:22 AM CST	Red Flag Warning	ILX	17 hr
Mar 4, 7:09 PM CST	Dense Fog Advisory	ILX	14 hr
Mar 5, 9:28 PM CST	Dense Fog Advisory	ILX	12 hr
Mar 6, 3:42 PM CST	Severe Thunderstorm Warning	ILX	33 min
Mar 6, 4:13 PM CST	Severe Thunderstorm Warning	ILX	47 min
Mar 6, 4:21 PM CST	Areal Flood Advisory	ILX	103 min
Mar 10, 1:53 PM CDT	Mesoscale Discussion	SPC	3 hr
Mar 10, 3:57 PM CDT	Tornado Watch	SPC	10 hr
Mar 10, 7:51 PM CDT	Mesoscale Discussion	SPC	54 min
Mar 10, 10:01 PM CDT	Mesoscale Discussion	SPC	89 min
Mar 10, 11:34 PM CDT	Severe Thunderstorm Warning	ILX	41 min
Mar 10, 11:38 PM CDT	Severe Thunderstorm Warning	ILX	52 min
Mar 10, 11:57 PM CDT	Tornado Warning	ILX	37 min
Mar 11, 12:13 AM CDT	Severe Thunderstorm Warning	ILX	17 min
Mar 11, 12:18 AM CDT	Severe Thunderstorm Warning	ILX	42 min
Mar 12, 2:22 AM CDT	Wind Advisory	ILX	38 hr
Mar 14, 11:32 AM CDT	Wind Advisory	ILX	48 hr
Mar 15, 8:02 AM CDT	Severe Thunderstorm Warning	ILX	17 min
Mar 15, 8:17 AM CDT	Severe Thunderstorm Warning	ILX	28 min
Mar 15, 10:39 AM CDT	Winter Weather Advisory	ILX	37 hr
Mar 15, 3:43 PM CDT	Tornado Watch	SPC	5 hr
Mar 26, 2:48 PM CDT	Mesoscale Discussion	SPC	117 min
Mar 26, 4:15 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Mar 26, 5:19 PM CDT	Blowing Dust Advisory	ILX	4 hr
Mar 26, 7:21 PM CDT	Mesoscale Discussion	SPC	54 min
Mar 26, 10:27 PM CDT	Mesoscale Discussion	SPC	63 min
Mar 31, 9:17 AM CDT	Severe Thunderstorm Warning	ILX	43 min
Mar 31, 9:36 AM CDT	Severe Thunderstorm Warning	ILX	39 min
Mar 31, 2:44 PM CDT	Mesoscale Discussion	SPC	3 hr
Apr 1, 12:18 PM CDT	Wind Advisory	ILX	31 hr
Apr 2, 1:43 PM CDT	Tornado Watch	SPC	8 hr
Apr 3, 1:26 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 3, 4:05 PM CDT	Severe Thunderstorm Warning	ILX	55 min
Apr 3, 4:54 PM CDT	Severe Thunderstorm Warning	ILX	51 min
Apr 3, 4:59 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 3, 5:00 PM CDT	Tornado Warning	ILX	30 min
Apr 3, 5:18 PM CDT	Tornado Watch	SPC	4 hr
Apr 3, 5:29 PM CDT	Tornado Warning	ILX	31 min
Apr 3, 6:28 PM CDT	Severe Thunderstorm Warning	ILX	47 min
Apr 3, 6:40 PM CDT	Tornado Warning	ILX	35 min
Apr 3, 7:24 PM CDT	Mesoscale Discussion	SPC	96 min
Apr 3, 8:58 PM CDT	Flood Watch	ILX	8 hr
Apr 3, 11:53 PM CDT	River Flood Warning	ILX	38 days
Apr 5, 1:04 PM CDT	Freeze Watch	ILX	25 hr
Apr 12, 3:34 PM CDT	Blowing Dust Advisory	ILX	3 hr
Apr 13, 11:03 AM CDT	Mesoscale Discussion	SPC	87 min
Apr 14, 1:55 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 15, 9:26 PM CDT	Mesoscale Discussion	SPC	94 min
Apr 17, 1:04 PM CDT	Flood Watch	ILX	15 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, 4:45 PM CDT	Severe Thunderstorm Warning	ILX	45 min
Apr 17, 6:25 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 17, 7:26 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	34 min
Apr 17, 7:56 PM CDT	Tornado Warning	ILX	34 min
Apr 17, 7:58 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	49 min
Apr 17, 8:09 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 17, 8:10 PM CDT	Tornado Warning	ILX	35 min
Apr 17, 8:16 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	59 min
Apr 17, 8:20 PM CDT	Tornado Warning Tornado observed	ILX	40 min
Apr 17, 8:28 PM CDT	Tornado Warning	ILX	32 min
Apr 18, 1:48 PM CDT	Frost Advisory	ILX	18 hr
Apr 18, 1:48 PM CDT	Freeze Watch	ILX	12 hr
Apr 19, 1:28 AM CDT	Freeze Warning	ILX	31 hr
Apr 27, 8:31 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 27, 9:09 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	51 min
Apr 27, 9:37 AM CDT	Severe Thunderstorm Warning	ILX	23 min
Apr 27, 9:53 AM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	37 min
Apr 27, 10:31 AM CDT	Mesoscale Discussion	SPC	119 min
Apr 27, 4:41 PM CDT	Tornado Watch	SPC	6 hr
Apr 27, 4:57 PM CDT	Severe Thunderstorm Warning	ILX	48 min
Apr 27, 5:07 PM CDT	Severe Thunderstorm Warning	ILX	38 min
Apr 27, 5:42 PM CDT	Tornado Warning	ILX	33 min
Apr 27, 6:02 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	32 min
May 3, 1:33 PM CDT	Blowing Dust Advisory	ILX	5 hr
May 4, 2:37 AM CDT	Blowing Dust Advisory	ILX	16 hr
May 4, 9:54 PM CDT	Severe Thunderstorm Warning	ILX	36 min
May 4, 10:10 PM CDT	Severe Thunderstorm Warning	ILX	35 min
May 4, 10:23 PM CDT	Severe Thunderstorm Warning	ILX	37 min
May 4, 10:40 PM CDT	Severe Thunderstorm Warning	ILX	35 min
May 9, 2:03 AM CDT	Dense Fog Advisory	ILX	6 hr
May 12, 1:43 AM CDT	Blowing Dust Advisory	ILX	17 hr
May 17, 5:40 PM CDT	Blowing Dust Advisory	ILX	2 hr
May 18, 6:51 AM CDT	Mesoscale Discussion	SPC	84 min
May 18, 8:18 AM CDT	Severe Thunderstorm Warning	ILX	39 min
May 18, 8:40 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 8, 1:37 AM CDT	Flood Watch	ILX	23 hr
Jun 10, 11:05 AM CDT	Flood Watch	ILX	17 hr
Jun 10, 11:09 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 10, 1:34 PM CDT	Severe Thunderstorm Warning	ILX	26 min
Jun 10, 2:03 PM CDT	Severe Thunderstorm Warning	ILX	27 min
Jun 10, 2:06 PM CDT	Mesoscale Discussion	SPC	54 min
Jun 10, 2:11 PM CDT	Severe Thunderstorm Warning	ILX	49 min
Jun 10, 2:27 PM CDT	Severe Thunderstorm Warning	ILX	33 min
Jun 10, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 10, 3:00 PM CDT	Severe Thunderstorm Warning	ILX	30 min
Jun 10, 6:35 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 10, 7:06 PM CDT	Tornado Watch	SPC	4 hr
Jun 10, 7:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jun 10, 8:24 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 10, 10:00 PM CDT	Flash Flood Warning	ILX	4 hr
Jun 10, 10:36 PM CDT	Severe Thunderstorm Warning	ILX	24 min
Jun 10, 11:05 PM CDT	Severe Thunderstorm Warning	ILX	40 min
Jun 11, 9:53 AM CDT	Mesoscale Discussion	SPC	97 min
Jun 11, 11:37 AM CDT	River Flood Warning	ILX	37 days
Jun 11, 11:39 AM CDT	Flood Watch	ILX	9 hr
Jun 11, 12:22 PM CDT	Mesoscale Discussion	SPC	83 min
Jun 11, 1:57 PM CDT	Tornado Watch	SPC	7 hr
Jun 11, 3:07 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 11, 5:19 PM CDT	Tornado Warning	ILX	41 min
Jun 11, 5:49 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	41 min
Jun 11, 5:51 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	39 min
Jun 11, 5:59 PM CDT	Tornado Warning	ILX	31 min
Jun 11, 6:14 PM CDT	Mesoscale Discussion	SPC	91 min
Jun 11, 6:30 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	45 min
Jun 11, 7:01 PM CDT	Flash Flood Warning	ILX	4 hr
Jun 16, 12:28 PM CDT	Wind Advisory	ILX	30 hr
Jun 17, 7:49 AM CDT	Tornado Watch	SPC	6 hr
Jun 17, 8:16 AM CDT	Mesoscale Discussion	SPC	59 min
Jun 17, 9:45 AM CDT	Severe Thunderstorm Warning	ILX	60 min
Jun 17, 1:03 PM CDT	Mesoscale Discussion	SPC	117 min
Jun 17, 2:14 PM CDT	Tornado Watch	SPC	11 hr
Jun 17, 2:53 PM CDT	Severe Thunderstorm Warning	ILX	50 min
Jun 17, 3:50 PM CDT	Severe Thunderstorm Warning	ILX	55 min
Jun 17, 3:52 PM CDT	Severe Thunderstorm Warning	ILX	26 min
Jun 17, 3:57 PM CDT	Severe Thunderstorm Warning	ILX	63 min
Jun 17, 4:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 17, 4:14 PM CDT	Severe Thunderstorm Warning	ILX	28 min
Jun 17, 4:29 PM CDT	Severe Thunderstorm Warning	ILX	61 min
Jun 17, 5:26 PM CDT	Severe Thunderstorm Warning	ILX	34 min
Jun 20, 1:45 AM CDT	Flood Watch	ILX	45 hr
Jun 20, 7:14 PM CDT	River Flood Warning	ILX	49 hr
Jun 27, 11:14 AM CDT	Heat Advisory	ILX	32 hr
Jun 28, 2:13 AM CDT	Heat Advisory	ILX	46 hr
Jun 28, 2:34 AM CDT	Dense Fog Advisory	ILX	6 hr
Jun 30, 12:23 AM CDT	Extreme Heat Warning	ILX	4 days
Jul 2, 11:44 PM CDT	Heat Advisory	ILX	43 hr
Jul 20, 5:37 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 20, 5:38 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 20, 9:09 PM CDT	Severe Thunderstorm Warning Considerable damage threat	ILX	50 min
Jul 24, 1:31 PM CDT	Heat Advisory	ILX	61 hr
Jul 26, 12:23 AM CDT	Extreme Heat Warning	ILX	45 hr
Jul 26, 1:52 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 27, 2:58 PM CDT	Mesoscale Discussion	SPC	92 min
Aug 9, 2:03 AM CDT	Heat Advisory	ILX	17 hr
Aug 9, 2:03 AM CDT	Heat Advisory	ILX	41 hr
Aug 10, 2:34 PM CDT	Heat Advisory	ILX	29 hr
Aug 12, 6:41 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 12, 12:12 PM CDT	Mesoscale Discussion	SPC	63 min
Aug 13, 2:29 AM CDT	Dense Fog Advisory	ILX	7 hr
Aug 13, 10:28 AM CDT	Mesoscale Discussion	SPC	3 hr
Aug 13, 12:09 PM CDT	Severe Thunderstorm Warning	ILX	66 min
Aug 13, 11:03 PM CDT	Mesoscale Discussion	SPC	117 min
Aug 14, 10:00 AM CDT	Flash Flood Warning	ILX	4 hr
Aug 14, 12:15 PM CDT	Flood Watch	ILX	22 hr
Aug 14, 11:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 14, 11:56 PM CDT	Flash Flood Warning	ILX	7 hr
Aug 15, 1:23 AM CDT	Severe Thunderstorm Warning	ILX	67 min
Aug 15, 3:43 AM CDT	Severe Thunderstorm Warning	ILX	62 min
Aug 15, 6:37 AM CDT	Areal Flood Warning	ILX	27 hr
Aug 15, 10:11 AM CDT	River Flood Warning	ILX	13 days
Aug 16, 12:12 PM CDT	Mesoscale Discussion	SPC	93 min
Aug 19, 2:35 AM CDT	Flood Watch	ILX	22 hr
Aug 19, 4:52 PM CDT	Mesoscale Discussion	SPC	83 min
Aug 21, 2:22 PM CDT	Mesoscale Discussion	SPC	113 min
Aug 21, 11:17 PM CDT	Severe Thunderstorm Warning	ILX	43 min
Aug 30, 12:23 PM CDT	Heat Advisory	ILX	71 hr
Sep 2, 11:14 AM CDT	Extreme Heat Warning	ILX	3 days
Sep 10, 9:58 PM CDT	Dense Fog Advisory	ILX	11 hr
Sep 15, 2:35 PM CDT	Mesoscale Discussion	SPC	115 min

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	53
Tornado Warning	11
Severe Thunderstorm Watch	6
Tornado Watch	10
Mesoscale Discussion	41
Flooding
Areal Flood Warning	1
Flash Flood Warning	4
River Flood Warning	4
Flood Watch	8
Areal Flood Advisory	1
Winter
Winter Weather Advisory	2
Heat
Extreme Heat Warning	3
Heat Advisory	8
Cold
Freeze Warning	1
Freeze Watch	2
Cold Weather Advisory	3
Frost Advisory	1
Wind and dust
Blowing Dust Advisory	6
Wind Advisory	6
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	9

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2025

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. Rebuilt daily.