Alert archive / Illinois / LaSalle County

Weather alerts in LaSalle County, Illinois, 2021

139 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

LaSalle County and its neighbors

Each county as a circle sized by its count in 2021. Tap one for its archive.

Alerts: 139
Warnings: 33
Watches: 21
Advisories: 49
Busiest month: August25 alerts
Busiest day: October 11, 20217 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 1, 6:35 AM CST	Mesoscale Discussion	SPC	4 hr
Jan 2, 3:04 PM CST	Dense Fog Advisory	LOT	20 hr
Jan 3, 3:37 PM CST	Dense Fog Advisory	LOT	29 hr
Jan 5, 3:18 PM CST	Dense Fog Advisory	LOT	19 hr
Jan 24, 3:05 AM CST	Winter Storm Watch	LOT	12 hr
Jan 24, 2:55 PM CST	Winter Storm Warning	LOT	48 hr
Jan 24, 2:55 PM CST	Winter Weather Advisory	LOT	48 hr
Jan 29, 3:23 AM CST	Winter Storm Watch	LOT	24 hr
Jan 29, 2:38 PM CST	Winter Storm Warning	LOT	51 hr
Jan 30, 3:27 AM CST	Winter Weather Advisory	LOT	39 hr
Jan 30, 6:23 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 3, 5:47 AM CST	Dense Fog Advisory	LOT	5 hr
Feb 3, 2:29 PM CST	Winter Weather Advisory	LOT	46 hr
Feb 5, 2:24 PM CST	Winter Weather Advisory	LOT	31 hr
Feb 6, 3:34 AM CST	Wind Chill Advisory	LOT	32 hr
Feb 8, 11:13 AM CST	Winter Weather Advisory	LOT	16 hr
Feb 8, 3:10 PM CST	Wind Chill Advisory	LOT	19 hr
Feb 13, 3:33 AM CST	Wind Chill Warning	LOT	31 hr
Feb 13, 3:33 AM CST	Wind Chill Advisory	LOT	56 hr
Feb 14, 2:19 PM CST	Winter Weather Advisory	LOT	43 hr
Feb 15, 2:52 PM CST	Mesoscale Discussion	SPC	6 hr
Feb 27, 5:30 AM CST	Dense Fog Advisory	LOT	6 hr
Feb 28, 6:29 AM CST	Dense Fog Advisory	LOT	6 hr
Feb 28, 4:25 PM CST	River Flood Advisory	LOT	61 hr
Feb 28, 8:32 PM CST	River Flood Advisory	LOT	69 hr
Mar 1, 10:26 AM CST	River Flood Advisory	LOT	32 hr
Mar 10, 3:25 AM CST	Wind Advisory	LOT	23 hr
Mar 15, 2:58 AM CDT	Winter Weather Advisory	LOT	16 hr
Mar 17, 2:35 PM CDT	Wind Advisory	LOT	28 hr
Apr 19, 3:45 AM CDT	Freeze Watch	LOT	11 hr
Apr 19, 2:58 PM CDT	Freeze Warning	LOT	42 hr
Apr 21, 3:22 AM CDT	Freeze Warning	LOT	29 hr
Apr 29, 6:01 PM CDT	Special Weather Statement	LOT	59 min
Apr 30, 2:50 PM CDT	Wind Advisory	LOT	28 hr
May 7, 2:07 PM CDT	Frost Advisory	LOT	18 hr
May 9, 9:28 AM CDT	Areal Flood Advisory	LOT	6 hr
May 9, 2:18 PM CDT	Frost Advisory	LOT	18 hr
May 10, 12:51 PM CDT	River Flood Advisory	LOT	30 hr
May 10, 12:51 PM CDT	River Flood Advisory	LOT	60 hr
May 10, 4:06 PM CDT	Special Weather Statement	LOT	54 min
May 10, 7:28 PM CDT	River Flood Warning	LOT	13 hr
May 11, 8:12 AM CDT	River Flood Advisory	LOT	35 hr
May 11, 2:11 PM CDT	Frost Advisory	LOT	17 hr
Jun 11, 1:07 PM CDT	Special Weather Statement	LOT	113 min
Jun 11, 5:10 PM CDT	Special Weather Statement	LOT	80 min
Jun 12, 1:23 PM CDT	Special Weather Statement	LOT	112 min
Jun 12, 1:26 PM CDT	Mesoscale Discussion	SPC	3 hr
Jun 20, 10:57 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 8:10 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 20, 9:54 PM CDT	Mesoscale Discussion	SPC	66 min
Jun 20, 10:50 PM CDT	Severe Thunderstorm Warning	LOT	55 min
Jun 24, 2:19 PM CDT	Flash Flood Watch	LOT	54 hr
Jun 25, 2:01 AM CDT	Special Weather Statement	LOT	59 min
Jun 26, 11:44 AM CDT	Tornado Warning	LOT	36 min
Jun 26, 2:43 PM CDT	Areal Flood Advisory	LOT	6 hr
Jun 26, 9:13 PM CDT	River Flood Warning	LOT	3 days
Jun 26, 10:10 PM CDT	River Flood Warning	LOT	40 hr
Jun 26, 10:14 PM CDT	River Flood Warning	LOT	5 days
Jun 26, 10:17 PM CDT	River Flood Warning	LOT	10 days
Jun 28, 3:01 AM CDT	Flash Flood Watch	LOT	40 hr
Jun 28, 11:28 AM CDT	River Flood Advisory	LOT	32 hr
Jun 29, 7:24 PM CDT	River Flood Warning	LOT	25 hr
Jun 30, 10:40 AM CDT	Areal Flood Advisory	LOT	4 hr
Jun 30, 10:08 PM CDT	River Flood Advisory	LOT	16 hr
Jul 7, 2:02 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 12, 8:14 PM CDT	Areal Flood Advisory	LOT	4 hr
Jul 12, 8:42 PM CDT	Flash Flood Warning	LOT	5 hr
Jul 13, 1:29 AM CDT	Areal Flood Warning	LOT	9 hr
Jul 14, 11:57 PM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jul 15, 2:14 AM CDT	Mesoscale Discussion	SPC	61 min
Jul 24, 3:00 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 24, 3:32 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 24, 5:21 PM CDT	Mesoscale Discussion	SPC	114 min
Jul 29, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jul 29, 3:18 AM CDT	Mesoscale Discussion	SPC	87 min
Aug 6, 3:23 PM CDT	Mesoscale Discussion	SPC	97 min
Aug 9, 12:18 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 9, 2:43 PM CDT	Tornado Watch	SPC	9 hr
Aug 9, 2:46 PM CDT	Heat Advisory	LOT	28 hr
Aug 9, 5:53 PM CDT	Mesoscale Discussion	SPC	67 min
Aug 9, 8:33 PM CDT	Mesoscale Discussion	SPC	87 min
Aug 10, 3:07 PM CDT	Heat Advisory	LOT	28 hr
Aug 10, 3:47 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Aug 10, 6:10 PM CDT	Severe Thunderstorm Warning	LOT	65 min
Aug 10, 7:13 PM CDT	Severe Thunderstorm Warning	LOT	47 min
Aug 11, 1:20 AM CDT	Mesoscale Discussion	SPC	115 min
Aug 11, 8:34 AM CDT	Mesoscale Discussion	SPC	86 min
Aug 11, 8:41 AM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	49 min
Aug 11, 8:52 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 11, 7:35 PM CDT	Mesoscale Discussion	SPC	85 min
Aug 11, 8:22 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Aug 11, 11:06 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 12, 2:50 AM CDT	Special Weather Statement	LOT	40 min
Aug 12, 3:02 AM CDT	Severe Thunderstorm Warning	LOT	43 min
Aug 12, 3:16 AM CDT	Mesoscale Discussion	SPC	119 min
Aug 24, 3:19 AM CDT	Heat Advisory	LOT	17 hr
Aug 24, 4:33 PM CDT	Heat Advisory	LOT	26 hr
Aug 24, 6:54 PM CDT	Special Weather Statement	LOT	51 min
Aug 25, 4:02 PM CDT	Mesoscale Discussion	SPC	88 min
Aug 29, 1:18 PM CDT	Mesoscale Discussion	SPC	87 min
Sep 7, 1:12 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Sep 7, 2:03 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	72 min
Sep 7, 2:29 PM CDT	Severe Thunderstorm Warning Destructive damage threat	LOT	46 min
Sep 7, 2:57 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	63 min
Sep 7, 3:14 PM CDT	Mesoscale Discussion	SPC	91 min
Sep 7, 4:06 PM CDT	Severe Thunderstorm Warning	LOT	54 min
Sep 20, 11:44 PM CDT	Special Weather Statement	LOT	31 min
Oct 8, 9:45 PM CDT	Dense Fog Advisory	LOT	6 hr
Oct 11, 12:37 PM CDT	Mesoscale Discussion	SPC	113 min
Oct 11, 3:10 PM CDT	Tornado Watch	SPC	6 hr
Oct 11, 3:37 PM CDT	Mesoscale Discussion	SPC	83 min
Oct 11, 5:37 PM CDT	Severe Thunderstorm Warning Considerable damage threat	LOT	68 min
Oct 11, 6:09 PM CDT	Mesoscale Discussion	SPC	96 min
Oct 11, 6:44 PM CDT	Severe Thunderstorm Warning	LOT	61 min
Oct 11, 6:49 PM CDT	Tornado Warning	LOT	13 min
Oct 22, 1:29 PM CDT	Frost Advisory	LOT	19 hr
Oct 23, 12:46 PM CDT	Flash Flood Watch	LOT	38 hr
Oct 23, 9:57 PM CDT	River Flood Watch	LOT	4 days
Oct 24, 3:10 AM CDT	Wind Advisory	LOT	36 hr
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	71 hr
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	6 days
Oct 24, 11:28 AM CDT	River Flood Watch	LOT	3 days
Oct 24, 9:06 PM CDT	River Flood Warning	LOT	47 hr
Oct 24, 9:16 PM CDT	River Flood Warning	LOT	62 hr
Oct 24, 9:16 PM CDT	River Flood Warning	LOT	11 days
Oct 24, 9:16 PM CDT	River Flood Warning	LOT	64 hr
Oct 24, 10:02 PM CDT	Areal Flood Advisory	LOT	4 hr
Oct 30, 1:50 AM CDT	River Flood Advisory	LOT	49 hr
Oct 30, 6:23 AM CDT	River Flood Warning	LOT	26 hr
Oct 30, 11:24 AM CDT	River Flood Advisory	LOT	62 hr
Oct 31, 2:37 AM CDT	Freeze Warning	LOT	30 hr
Dec 4, 6:13 AM CST	Dense Fog Advisory	LOT	3 hr
Dec 5, 1:54 PM CST	Wind Advisory	LOT	22 hr
Dec 10, 2:56 AM CST	Wind Advisory	LOT	36 hr
Dec 14, 3:19 AM CST	High Wind Watch	LOT	24 hr
Dec 15, 3:09 AM CST	High Wind Warning	LOT	30 hr
Dec 27, 8:11 AM CST	Dense Fog Advisory	LOT	4 hr
Dec 27, 2:03 PM CST	Winter Weather Advisory	LOT	28 hr
Dec 28, 8:59 AM CST	Mesoscale Discussion	SPC	5 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	11
Tornado Warning	2
Severe Thunderstorm Watch	8
Tornado Watch	2
Mesoscale Discussion	27
Special Weather Statement	9
Flooding
Areal Flood Warning	1
Flash Flood Warning	1
River Flood Warning	11
Flash Flood Watch	3
River Flood Watch	4
Areal Flood Advisory	5
River Flood Advisory	10
Winter
Winter Storm Warning	2
Winter Storm Watch	2
Winter Weather Advisory	8
Heat
Heat Advisory	4
Cold
Freeze Warning	3
Wind Chill Warning	1
Freeze Watch	1
Frost Advisory	4
Wind Chill Advisory	3
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	6
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 2020 2022

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.