Alert archive / Illinois / Whiteside County

Weather alerts in Whiteside County, Illinois, 2008

219 weather alerts in 2008, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Whiteside County and its neighbors

Each county as a circle sized by its count in 2008. Tap one for its archive.

Alerts: 219
Warnings: 69
Watches: 44
Advisories: 57
Busiest month: June53 alerts
Busiest day: April 25, 200810 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

1 of 4 tornado warnings covering Whiteside County in 2008 had a tornado report inside them.

Whiteside County, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	4	1	75%	0
Severe thunderstorm warnings	27	15	44%	16	75%	15 min
Flash flood warnings	3	1	67%	0

Each office's whole area, 2008

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Quad Cities, IA: tornado warnings	41	12	71%	37	57%	24 min
NWS Quad Cities, IA: severe thunderstorm warnings	284	144	49%	525	77%	26 min
NWS Quad Cities, IA: flash flood warnings	68	37	46%	115	68%	141 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 1, 8:45 AM CST	Snow and Blowing Snow Advisory	DVN	7 hr
Jan 1, 3:30 PM CST	Blowing Snow Advisory	DVN	5 hr
Jan 1, 3:50 PM CST	River Flood Warning	DVN	8 days
Jan 1, 11:37 PM CST	Wind Chill Advisory	DVN	9 hr
Jan 5, 9:43 PM CST	Dense Fog Advisory	DVN	32 hr
Jan 6, 3:21 PM CST	Flood Watch	DVN	48 hr
Jan 7, 1:47 PM CST	Mesoscale Discussion	SPC	58 min
Jan 7, 2:35 PM CST	Tornado Watch	SPC	6 hr
Jan 7, 2:41 PM CST	Dense Fog Advisory	DVN	15 hr
Jan 16, 10:07 AM CST	River Flood Advisory	DVN	24 hr
Jan 18, 3:20 AM CST	Wind Chill Advisory	DVN	55 hr
Jan 20, 2:30 PM CST	Snow Advisory	DVN	37 hr
Jan 22, 3:15 AM CST	Blowing Snow Advisory	DVN	6 hr
Jan 22, 11:11 AM CST	River Flood Advisory	DVN	8 days
Jan 22, 8:32 PM CST	River Flood Warning	DVN	19 days
Jan 23, 3:43 AM CST	Wind Chill Advisory	DVN	32 hr
Jan 24, 3:39 AM CST	Wind Chill Warning	DVN	6 hr
Jan 27, 3:43 PM CST	Wind Advisory	DVN	27 hr
Jan 28, 3:28 PM CST	Blowing Snow Advisory	DVN	6 hr
Jan 28, 9:41 PM CST	Blizzard Warning	DVN	17 hr
Jan 29, 12:19 PM CST	Mesoscale Discussion	SPC	4 hr
Jan 29, 3:04 PM CST	Winter Weather Advisory	DVN	9 hr
Jan 29, 11:50 PM CST	Wind Chill Advisory	DVN	11 hr
Jan 31, 3:11 AM CST	Snow Advisory	DVN	30 hr
Feb 3, 12:53 PM CST	Winter Weather Advisory	DVN	8 hr
Feb 3, 4:42 PM CST	Mesoscale Discussion	SPC	4 hr
Feb 3, 4:56 PM CST	Winter Storm Warning	DVN	4 hr
Feb 4, 3:55 AM CST	Winter Storm Watch	DVN	24 hr
Feb 4, 12:03 PM CST	Dense Fog Advisory	DVN	12 hr
Feb 5, 3:43 AM CST	Winter Storm Warning	DVN	38 hr
Feb 6, 6:07 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 6, 6:01 PM CST	Blowing Snow Advisory	DVN	3 hr
Feb 9, 3:46 AM CST	Wind Chill Advisory	DVN	38 hr
Feb 9, 5:50 PM CST	Blowing Snow Advisory	DVN	6 hr
Feb 11, 3:22 AM CST	Snow Advisory	DVN	23 hr
Feb 15, 1:33 PM CST	Winter Storm Watch	DVN	27 hr
Feb 16, 3:44 AM CST	Flood Watch	DVN	33 hr
Feb 16, 4:13 PM CST	Winter Weather Advisory	DVN	27 hr
Feb 17, 3:39 PM CST	River Flood Advisory	DVN	4 hr
Feb 17, 8:02 PM CST	River Flood Warning	DVN	7 days
Feb 18, 3:54 PM CST	Wind Chill Advisory	DVN	17 hr
Feb 19, 3:06 AM CST	River Flood Advisory	DVN	64 hr
Feb 19, 3:37 PM CST	Winter Weather Advisory	DVN	18 hr
Feb 20, 9:29 AM CST	Wind Chill Advisory	DVN	3 hr
Feb 24, 4:28 AM CST	Winter Storm Watch	DVN	23 hr
Feb 25, 3:50 AM CST	Winter Storm Warning	DVN	23 hr
Feb 28, 2:54 PM CST	Snow Advisory	DVN	9 hr
Mar 2, 5:26 PM CST	Mesoscale Discussion	SPC	2 hr
Mar 2, 5:58 PM CST	Flash Flood Watch	DVN	11 hr
Mar 3, 2:56 AM CST	River Flood Warning	DVN	75 days
Mar 3, 9:57 AM CST	River Flood Advisory	DVN	19 hr
Mar 3, 10:45 AM CST	Flash Flood Watch	DVN	29 hr
Mar 4, 4:51 AM CST	River Flood Warning	DVN	60 hr
Mar 11, 3:11 PM CDT	Flash Flood Watch	DVN	3 days
Mar 13, 10:08 AM CDT	River Flood Advisory	DVN	24 hr
Mar 18, 6:44 AM CDT	Dense Fog Advisory	DVN	5 hr
Mar 20, 4:03 AM CDT	Winter Storm Watch	DVN	9 hr
Mar 20, 12:51 PM CDT	Winter Weather Advisory	DVN	21 hr
Mar 30, 3:38 AM CDT	Flood Watch	DVN	40 hr
Apr 9, 3:15 AM CDT	Flash Flood Watch	DVN	42 hr
Apr 10, 9:48 AM CDT	River Flood Warning	DVN	7 days
Apr 10, 12:07 PM CDT	Wind Advisory	DVN	3 hr
Apr 16, 3:55 AM CDT	Wind Advisory	DVN	12 hr
Apr 18, 11:24 AM CDT	River Flood Warning	DVN	20 days
Apr 18, 9:07 PM CDT	River Flood Warning	DVN	62 hr
Apr 20, 5:31 AM CDT	Dense Fog Advisory	DVN	5 hr
Apr 22, 7:43 AM CDT	Severe Thunderstorm Warning	DVN	32 min
Apr 24, 9:24 PM CDT	River Flood Warning	DVN	11 days
Apr 25, 4:51 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 25, 9:10 AM CDT	Mesoscale Discussion	SPC	65 min
Apr 25, 12:21 PM CDT	Mesoscale Discussion	SPC	54 min
Apr 25, 1:27 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Apr 25, 3:28 PM CDT	Mesoscale Discussion	SPC	62 min
Apr 25, 3:41 PM CDT	Tornado Watch	SPC	4 hr
Apr 25, 4:07 PM CDT	Tornado Warning	DVN	38 min
Apr 25, 5:18 PM CDT	Mesoscale Discussion	SPC	57 min
Apr 25, 6:01 PM CDT	Mesoscale Discussion	SPC	59 min
Apr 28, 3:21 AM CDT	Freeze Warning	DVN	28 hr
May 2, 1:42 AM CDT	Severe Thunderstorm Warning	DVN	63 min
May 2, 3:05 PM CDT	Mesoscale Discussion	SPC	115 min
May 10, 2:53 AM CDT	Flood Watch	DVN	34 hr
May 10, 3:11 PM CDT	Wind Advisory	DVN	22 hr
May 11, 10:53 AM CDT	River Flood Warning	DVN	4 days
May 13, 4:08 PM CDT	Severe Thunderstorm Warning	DVN	37 min
May 13, 4:43 PM CDT	Severe Thunderstorm Warning	DVN	17 min
May 25, 11:21 AM CDT	Severe Thunderstorm Warning	DVN	24 min
May 25, 7:54 PM CDT	Tornado Watch	SPC	6 hr
May 25, 9:23 PM CDT	Mesoscale Discussion	SPC	67 min
May 25, 11:28 PM CDT	Mesoscale Discussion	SPC	62 min
May 29, 3:45 AM CDT	Flash Flood Watch	DVN	30 hr
May 30, 6:00 AM CDT	Mesoscale Discussion	SPC	2 hr
May 30, 4:29 PM CDT	Mesoscale Discussion	SPC	61 min
May 31, 9:17 PM CDT	Severe Thunderstorm Warning	DVN	58 min
May 31, 10:02 PM CDT	Severe Thunderstorm Warning	DVN	58 min
Jun 3, 7:19 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jun 4, 4:26 AM CDT	Flash Flood Watch	DVN	30 hr
Jun 4, 5:51 PM CDT	Mesoscale Discussion	SPC	84 min
Jun 4, 7:02 PM CDT	Tornado Watch	SPC	8 hr
Jun 5, 4:11 AM CDT	Mesoscale Discussion	SPC	94 min
Jun 5, 4:59 AM CDT	Tornado Watch	SPC	6 hr
Jun 5, 6:46 AM CDT	Mesoscale Discussion	SPC	119 min
Jun 5, 6:58 AM CDT	Severe Thunderstorm Warning	DVN	32 min
Jun 6, 4:20 AM CDT	Severe Thunderstorm Warning	DVN	55 min
Jun 6, 10:50 AM CDT	Mesoscale Discussion	SPC	85 min
Jun 6, 11:27 AM CDT	Wind Advisory	DVN	4 hr
Jun 7, 4:30 AM CDT	Flash Flood Watch	DVN	47 hr
Jun 7, 10:35 AM CDT	Mesoscale Discussion	SPC	85 min
Jun 7, 1:50 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 7, 2:01 PM CDT	Tornado Watch	SPC	6 hr
Jun 7, 2:25 PM CDT	Severe Thunderstorm Warning	DVN	47 min
Jun 7, 2:52 PM CDT	Severe Thunderstorm Warning	DVN	53 min
Jun 7, 10:13 PM CDT	River Flood Warning	DVN	15 days
Jun 7, 10:13 PM CDT	River Flood Warning	DVN	17 days
Jun 8, 8:43 AM CDT	Mesoscale Discussion	SPC	62 min
Jun 8, 9:47 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 8, 10:27 AM CDT	River Flood Warning	DVN	47 days
Jun 8, 10:55 AM CDT	Severe Thunderstorm Warning	DVN	65 min
Jun 8, 4:43 PM CDT	Tornado Watch	SPC	6 hr
Jun 8, 9:04 PM CDT	Severe Thunderstorm Warning	DVN	56 min
Jun 8, 10:01 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 9, 10:35 AM CDT	River Flood Warning	DVN	18 days
Jun 11, 3:46 PM CDT	Flash Flood Watch	DVN	43 hr
Jun 12, 12:37 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 12, 1:04 PM CDT	Tornado Watch	SPC	7 hr
Jun 12, 3:45 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 12, 3:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 12, 6:04 PM CDT	Severe Thunderstorm Warning	DVN	26 min
Jun 12, 6:49 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 12, 7:03 PM CDT	Flash Flood Warning	DVN	6 hr
Jun 12, 7:48 PM CDT	Tornado Watch	SPC	6 hr
Jun 12, 7:59 PM CDT	Severe Thunderstorm Warning	DVN	30 min
Jun 12, 8:43 PM CDT	Severe Thunderstorm Warning	DVN	36 min
Jun 12, 9:49 PM CDT	Tornado Warning	DVN	41 min
Jun 12, 10:30 PM CDT	Tornado Warning	DVN	45 min
Jun 12, 11:15 PM CDT	Mesoscale Discussion	SPC	90 min
Jun 12, 11:21 PM CDT	Severe Thunderstorm Warning	DVN	69 min
Jun 14, 1:11 PM CDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 14, 5:17 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 14, 7:33 PM CDT	Severe Thunderstorm Warning	DVN	42 min
Jun 15, 5:10 AM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 20, 1:54 PM CDT	Mesoscale Discussion	SPC	96 min
Jun 25, 10:18 PM CDT	Mesoscale Discussion	SPC	87 min
Jun 26, 3:42 AM CDT	Flash Flood Watch	DVN	36 hr
Jun 27, 8:56 PM CDT	Mesoscale Discussion	SPC	94 min
Jun 28, 10:44 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 9:42 AM CDT	Mesoscale Discussion	SPC	2 hr
Jul 2, 1:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 2, 3:08 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 2, 7:03 PM CDT	Mesoscale Discussion	SPC	57 min
Jul 7, 7:40 PM CDT	Severe Thunderstorm Watch	SPC	4 hr
Jul 7, 8:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jul 10, 12:55 PM CDT	Mesoscale Discussion	SPC	95 min
Jul 10, 1:18 PM CDT	Severe Thunderstorm Watch	SPC	10 hr
Jul 10, 2:41 PM CDT	Severe Thunderstorm Warning	DVN	49 min
Jul 10, 2:53 PM CDT	Tornado Warning	DVN	39 min
Jul 10, 3:01 PM CDT	Severe Thunderstorm Warning	DVN	44 min
Jul 10, 3:46 PM CDT	Severe Thunderstorm Warning	DVN	59 min
Jul 10, 5:52 PM CDT	Mesoscale Discussion	SPC	83 min
Jul 12, 1:52 AM CDT	Mesoscale Discussion	SPC	53 min
Jul 12, 9:35 AM CDT	River Flood Warning	DVN	3 days
Jul 19, 6:56 PM CDT	Mesoscale Discussion	SPC	2 hr
Jul 19, 7:59 PM CDT	Tornado Watch	SPC	4 hr
Jul 20, 3:10 AM CDT	Flash Flood Watch	DVN	28 hr
Jul 21, 5:46 AM CDT	Severe Thunderstorm Warning	DVN	59 min
Jul 21, 6:25 AM CDT	Severe Thunderstorm Warning	DVN	65 min
Jul 29, 6:43 PM CDT	Severe Thunderstorm Warning	DVN	37 min
Jul 31, 3:24 AM CDT	Dense Fog Advisory	DVN	7 hr
Jul 31, 3:51 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 3, 7:16 AM CDT	Severe Thunderstorm Warning	DVN	50 min
Aug 4, 3:51 PM CDT	Mesoscale Discussion	SPC	84 min
Aug 4, 4:48 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 4, 6:10 PM CDT	Severe Thunderstorm Warning	DVN	50 min
Aug 4, 6:45 PM CDT	Mesoscale Discussion	SPC	90 min
Aug 4, 7:03 PM CDT	Severe Thunderstorm Warning	DVN	27 min
Aug 5, 1:53 AM CDT	Mesoscale Discussion	SPC	97 min
Sep 12, 3:43 AM CDT	Flash Flood Watch	DVN	56 hr
Sep 13, 4:49 AM CDT	Flash Flood Warning	DVN	6 hr
Sep 13, 8:18 AM CDT	Flash Flood Warning	DVN	6 hr
Sep 13, 9:51 AM CDT	River Flood Warning	DVN	58 hr
Sep 13, 10:46 AM CDT	Areal Flood Warning	DVN	12 hr
Sep 16, 5:29 AM CDT	Dense Fog Advisory	DVN	4 hr
Oct 16, 2:59 PM CDT	Frost Advisory	DVN	15 hr
Oct 18, 3:08 AM CDT	Dense Fog Advisory	DVN	8 hr
Oct 25, 10:51 AM CDT	Wind Advisory	DVN	33 hr
Oct 26, 4:06 AM CDT	Freeze Warning	DVN	22 hr
Oct 26, 11:12 AM CDT	High Wind Warning	DVN	9 hr
Oct 27, 3:36 AM CDT	Freeze Warning	DVN	29 hr
Nov 29, 1:50 PM CST	Winter Weather Advisory	DVN	37 hr
Nov 30, 4:17 AM CST	Winter Storm Warning	DVN	16 hr
Dec 2, 3:15 PM CST	Winter Weather Advisory	DVN	24 hr
Dec 6, 5:43 AM CST	Winter Weather Advisory	DVN	5 hr
Dec 7, 3:10 AM CST	Winter Storm Watch	DVN	37 hr
Dec 8, 9:18 AM CST	Freezing Rain Advisory	DVN	7 hr
Dec 10, 10:16 AM CST	River Flood Warning	DVN	6 days
Dec 14, 3:20 PM CST	Winter Weather Advisory	DVN	11 hr
Dec 14, 5:47 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 14, 11:47 PM CST	Mesoscale Discussion	SPC	4 hr
Dec 15, 4:02 AM CST	Winter Storm Watch	DVN	11 hr
Dec 15, 3:13 PM CST	Winter Weather Advisory	DVN	28 hr
Dec 16, 8:43 PM CST	Winter Storm Watch	DVN	19 hr
Dec 17, 3:24 PM CST	Winter Storm Warning	DVN	43 hr
Dec 18, 6:46 PM CST	Mesoscale Discussion	SPC	6 hr
Dec 19, 12:45 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 20, 3:45 AM CST	Wind Chill Advisory	DVN	24 hr
Dec 20, 9:44 AM CST	River Flood Warning	DVN	11 hr
Dec 20, 3:12 PM CST	Blizzard Warning	DVN	27 hr
Dec 20, 7:20 PM CST	Winter Weather Advisory	DVN	8 hr
Dec 21, 3:40 AM CST	Wind Chill Warning	DVN	32 hr
Dec 21, 3:46 PM CST	Winter Weather Advisory	DVN	5 hr
Dec 22, 3:42 AM CST	Winter Storm Watch	DVN	32 hr
Dec 22, 3:42 AM CST	Winter Weather Advisory	DVN	62 hr
Dec 23, 11:35 AM CST	Winter Storm Warning	DVN	16 hr
Dec 25, 3:50 AM CST	Winter Weather Advisory	DVN	24 hr
Dec 26, 10:59 AM CST	Flash Flood Watch	DVN	26 hr
Dec 26, 1:24 PM CST	Dense Fog Advisory	DVN	17 hr
Dec 27, 4:23 AM CST	Winter Weather Advisory	DVN	23 hr
Dec 27, 11:47 AM CST	River Flood Warning	DVN	10 days
Dec 27, 7:49 PM CST	River Flood Warning	DVN	6 days
Dec 30, 10:15 AM CST	Wind Advisory	DVN	11 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	27
Tornado Warning	4
Severe Thunderstorm Watch	10
Tornado Watch	10
Mesoscale Discussion	49
Flooding
Areal Flood Warning	1
Flash Flood Warning	3
River Flood Warning	20
Flash Flood Watch	12
Flood Watch	4
River Flood Advisory	6
Winter
Blizzard Warning	2
Winter Storm Warning	6
Winter Storm Watch	8
Blowing Snow Advisory	5
Freezing Rain Advisory	1
Snow Advisory	4
Snow and Blowing Snow Advisory	1
Winter Weather Advisory	15
Cold
Freeze Warning	3
Wind Chill Warning	2
Frost Advisory	1
Wind Chill Advisory	8
Wind and dust
High Wind Warning	1
Wind Advisory	7
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 2007 2009

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.