Weather alerts in Williamson County, Illinois

3,159 weather alerts since 1986, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Williamson County and its neighbors

Each county as a circle sized by its count since 1986. Tap one for its archive.

Alerts: 3,159
Warnings: 800
Watches: 622
Advisories: 774
Busiest year: 2011179 alerts
Average year: 79over 40 years on file

Over time

By year

Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.

By month of the year

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	398
Tornado Warning	65
Severe Thunderstorm Watch	233
Tornado Watch	193
Mesoscale Discussion	873
Special Weather Statement	90
Flooding
Areal Flood Warning	30
Flash Flood Warning	108
River Flood Warning	45
Flash Flood Watch	56
Flood Watch	51
Areal Flood Advisory	105
Winter
Blizzard Warning	1
Heavy Snow Warning	1
Ice Storm Warning	2
Winter Storm Warning	31
Blizzard Watch	1
Winter Storm Watch	30
Freezing Rain Advisory	5
Snow Advisory	4
Winter Weather Advisory	94
Heat
Excessive Heat Warning	21
Extreme Heat Warning	7
Excessive Heat Watch	8
Extreme Heat Watch	3
Heat Advisory	93
Cold
Extreme Cold Warning	1
Freeze Warning	53
Hard Freeze Warning	1
Wind Chill Warning	1
Freeze Watch	30
Hard Freeze Watch	1
Wind Chill Watch	1
Cold Weather Advisory	7
Frost Advisory	55
Wind Chill Advisory	16
Wind and dust
High Wind Warning	4
High Wind Watch	1
Lake Wind Advisory	132
Wind Advisory	116
Fire
Red Flag Warning	31
Fire Weather Watch	14
Fog and smoke
Dense Fog Advisory	138
Freezing Fog Advisory	9

The latest warnings

The most recent on file, newest first.

Issued	Product	Office	Lasted
Sep 5, 6:56 PM CDT	Severe Thunderstorm Warning	PAH	34 min
Sep 1, 11:46 AM CDT	Extreme Heat Warning	PAH	4 days
Aug 10, 12:50 AM CDT	Extreme Heat Warning	PAH	7 days
Jul 25, 11:30 PM CDT	Extreme Heat Warning	PAH	68 hr
Jul 20, 8:38 AM CDT	Extreme Heat Warning	PAH	34 hr
Jul 11, 7:26 AM CDT	Areal Flood Warning	PAH	8 hr
Jul 10, 10:40 PM CDT	Flash Flood Warning	PAH	9 hr
Jul 10, 7:53 PM CDT	Severe Thunderstorm Warning Considerable damage threat	PAH	28 min
Jul 10, 7:20 PM CDT	Severe Thunderstorm Warning Considerable damage threat	PAH	40 min
Jul 10, 12:31 AM CDT	Flash Flood Warning	PAH	6 hr
Jun 28, 11:28 AM CDT	Extreme Heat Warning	PAH	5 days
Apr 27, 9:52 PM CDT	Severe Thunderstorm Warning Considerable damage threat	PAH	38 min

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive

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.