Alert archive / Illinois / Johnson County

Weather alerts in Johnson County, Illinois, 2020

112 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Johnson County and its neighbors

Each county as a circle sized by its count in 2020. Tap one for its archive.

Alerts: 112
Warnings: 20
Watches: 24
Advisories: 41
Busiest month: March22 alerts
Busiest day: March 12, 20207 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 8, 2:59 PM CST	Flash Flood Watch	PAH	3 days
Jan 10, 2:47 AM CST	Wind Advisory	PAH	39 hr
Jan 10, 9:37 AM CST	Areal Flood Warning	PAH	6 hr
Jan 11, 2:19 AM CST	Severe Thunderstorm Warning	PAH	41 min
Jan 11, 2:57 AM CST	Severe Thunderstorm Warning	PAH	33 min
Jan 11, 3:52 AM CST	Areal Flood Advisory	PAH	6 hr
Jan 14, 9:27 PM CST	Dense Fog Advisory	PAH	4 hr
Jan 29, 7:19 AM CST	Winter Weather Advisory	PAH	4 hr
Feb 11, 10:28 AM CST	Flash Flood Watch	PAH	34 hr
Mar 2, 3:54 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 2, 5:21 PM CST	Tornado Watch	SPC	8 hr
Mar 2, 6:39 PM CST	Mesoscale Discussion	SPC	96 min
Mar 2, 9:00 PM CST	Mesoscale Discussion	SPC	90 min
Mar 2, 10:00 PM CST	Flash Flood Warning	PAH	6 hr
Mar 12, 2:39 AM CDT	Dense Fog Advisory	PAH	7 hr
Mar 12, 11:13 AM CDT	Mesoscale Discussion	SPC	2 hr
Mar 12, 11:44 AM CDT	Tornado Watch	SPC	6 hr
Mar 12, 1:28 PM CDT	Mesoscale Discussion	SPC	2 hr
Mar 12, 2:21 PM CDT	Severe Thunderstorm Warning	PAH	39 min
Mar 12, 2:29 PM CDT	Areal Flood Advisory	PAH	3 hr
Mar 12, 3:44 PM CDT	Tornado Watch	SPC	7 hr
Mar 18, 11:10 PM CDT	Dense Fog Advisory	PAH	8 hr
Mar 19, 2:36 AM CDT	Flash Flood Watch	PAH	25 hr
Mar 19, 3:40 PM CDT	Mesoscale Discussion	SPC	65 min
Mar 19, 4:06 PM CDT	Tornado Watch	SPC	7 hr
Mar 19, 9:50 PM CDT	Tornado Watch	SPC	6 hr
Mar 25, 3:32 AM CDT	Dense Fog Advisory	PAH	5 hr
Mar 28, 1:17 PM CDT	Mesoscale Discussion	SPC	88 min
Mar 28, 3:53 PM CDT	Tornado Watch	SPC	5 hr
Mar 28, 4:59 PM CDT	Mesoscale Discussion	SPC	61 min
Mar 28, 6:25 PM CDT	Severe Thunderstorm Warning	PAH	50 min
Apr 8, 3:45 PM CDT	Mesoscale Discussion	SPC	2 hr
Apr 8, 4:24 PM CDT	Tornado Watch	SPC	7 hr
Apr 8, 7:28 PM CDT	Severe Thunderstorm Warning	PAH	21 min
Apr 8, 7:46 PM CDT	Mesoscale Discussion	SPC	119 min
Apr 8, 7:55 PM CDT	Severe Thunderstorm Warning	PAH	50 min
Apr 8, 8:40 PM CDT	Severe Thunderstorm Warning	PAH	20 min
Apr 10, 3:24 AM CDT	Frost Advisory	PAH	28 hr
Apr 12, 3:21 AM CDT	Wind Advisory	PAH	31 hr
Apr 13, 5:57 PM CDT	Freeze Watch	PAH	9 hr
Apr 14, 2:27 AM CDT	Freeze Warning	PAH	30 hr
Apr 15, 1:32 PM CDT	Frost Advisory	PAH	17 hr
Apr 17, 2:27 AM CDT	Frost Advisory	PAH	30 hr
Apr 24, 3:00 AM CDT	Dense Fog Advisory	PAH	6 hr
Apr 28, 6:41 PM CDT	Mesoscale Discussion	SPC	64 min
Apr 28, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 28, 11:12 PM CDT	Mesoscale Discussion	SPC	63 min
May 3, 11:44 AM CDT	Severe Thunderstorm Watch	SPC	7 hr
May 5, 2:15 AM CDT	Lake Wind Advisory	PAH	17 hr
May 6, 2:53 AM CDT	Lake Wind Advisory	PAH	15 hr
May 8, 3:59 AM CDT	Frost Advisory	PAH	28 hr
May 8, 3:59 AM CDT	Lake Wind Advisory	PAH	16 hr
May 9, 3:13 PM CDT	Lake Wind Advisory	PAH	27 hr
May 14, 3:25 AM CDT	Lake Wind Advisory	PAH	16 hr
May 17, 7:11 AM CDT	Lake Wind Advisory	PAH	11 hr
May 17, 4:18 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
May 25, 6:07 PM CDT	Special Weather Statement	PAH	38 min
May 25, 6:33 PM CDT	Severe Thunderstorm Warning	PAH	19 min
May 26, 5:26 PM CDT	Special Weather Statement	PAH	49 min
Jun 4, 2:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 9, 2:00 AM CDT	Wind Advisory	PAH	17 hr
Jun 9, 11:12 AM CDT	Severe Thunderstorm Warning	PAH	33 min
Jun 9, 12:23 PM CDT	Areal Flood Advisory	PAH	2 hr
Jun 10, 4:08 AM CDT	Lake Wind Advisory	PAH	15 hr
Jun 26, 2:27 AM CDT	Lake Wind Advisory	PAH	19 hr
Jun 27, 9:20 AM CDT	Lake Wind Advisory	PAH	11 hr
Jun 28, 12:12 AM CDT	Special Weather Statement	PAH	48 min
Jun 28, 12:50 AM CDT	Areal Flood Advisory	PAH	3 hr
Jun 28, 1:19 AM CDT	Flash Flood Warning	PAH	3 hr
Jun 30, 3:26 AM CDT	Flash Flood Watch	PAH	40 hr
Jun 30, 4:39 AM CDT	Flash Flood Warning	PAH	6 hr
Jun 30, 1:46 PM CDT	Flash Flood Warning	PAH	6 hr
Jun 30, 1:57 PM CDT	Special Weather Statement	PAH	33 min
Jun 30, 6:13 PM CDT	Special Weather Statement	PAH	32 min
Jun 30, 7:40 PM CDT	Areal Flood Warning	PAH	12 hr
Jul 2, 5:05 AM CDT	Dense Fog Advisory	PAH	3 hr
Jul 15, 6:12 PM CDT	Tornado Watch	SPC	5 hr
Jul 15, 8:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 17, 3:10 AM CDT	Heat Advisory	PAH	64 hr
Jul 17, 3:15 PM CDT	Flash Flood Warning	PAH	3 hr
Jul 20, 12:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 20, 1:58 PM CDT	Flash Flood Watch	PAH	5 hr
Jul 22, 11:54 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 29, 2:01 PM CDT	Areal Flood Advisory	PAH	119 min
Jul 30, 1:52 AM CDT	Flash Flood Watch	PAH	22 hr
Jul 30, 8:55 PM CDT	Special Weather Statement	PAH	50 min
Jul 31, 3:32 AM CDT	Flash Flood Watch	PAH	20 hr
Aug 9, 1:58 PM CDT	Heat Advisory	PAH	29 hr
Aug 10, 2:38 PM CDT	Mesoscale Discussion	SPC	2 hr
Aug 10, 6:31 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 10, 7:29 PM CDT	Mesoscale Discussion	SPC	91 min
Aug 10, 8:00 PM CDT	Special Weather Statement	PAH	60 min
Aug 12, 11:33 AM CDT	Flash Flood Watch	PAH	7 hr
Aug 12, 3:08 PM CDT	Areal Flood Advisory	PAH	76 min
Aug 13, 10:56 AM CDT	Flash Flood Watch	PAH	9 hr
Aug 22, 3:25 AM CDT	Dense Fog Advisory	PAH	6 hr
Aug 23, 4:08 AM CDT	Dense Fog Advisory	PAH	5 hr
Aug 31, 12:43 PM CDT	Mesoscale Discussion	SPC	92 min
Sep 12, 6:41 AM CDT	Dense Fog Advisory	PAH	2 hr
Sep 30, 9:47 AM CDT	Lake Wind Advisory	PAH	7 hr
Oct 4, 2:00 AM CDT	Frost Advisory	PAH	30 hr
Oct 15, 2:58 AM CDT	Frost Advisory	PAH	30 hr
Oct 16, 2:56 AM CDT	Frost Advisory	PAH	29 hr
Oct 16, 3:25 PM CDT	Red Flag Warning	PAH	28 hr
Oct 23, 1:30 PM CDT	Mesoscale Discussion	SPC	3 hr
Oct 28, 2:25 AM CDT	Flood Watch	PAH	32 hr
Oct 29, 3:26 AM CDT	Areal Flood Advisory	PAH	6 hr
Oct 30, 1:47 PM CDT	Freeze Watch	PAH	37 hr
Nov 1, 2:14 AM CST	Freeze Warning	PAH	30 hr
Nov 14, 3:16 AM CST	Wind Advisory	PAH	39 hr
Nov 19, 3:07 AM CST	Red Flag Warning	PAH	15 hr
Dec 4, 8:21 AM CST	Dense Fog Advisory	PAH	86 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	9
Severe Thunderstorm Watch	4
Tornado Watch	8
Mesoscale Discussion	20
Special Weather Statement	7
Flooding
Areal Flood Warning	2
Flash Flood Warning	5
Flash Flood Watch	9
Flood Watch	1
Areal Flood Advisory	7
Winter
Winter Weather Advisory	1
Heat
Heat Advisory	2
Cold
Freeze Warning	2
Freeze Watch	2
Frost Advisory	7
Wind and dust
Lake Wind Advisory	10
Wind Advisory	4
Fire
Red Flag Warning	2
Fog and smoke
Dense Fog Advisory	10

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2019 2021

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.