Alert archive / Illinois / Brown County
Weather alerts in Brown County, Illinois, 2015
115 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Brown County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 115
- Warnings
- 27
- Watches
- 24
- Advisories
- 24
- Busiest month
- June34 alerts
- Busiest day
- July 11, 20159 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Brown County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 9 | 3 | 67% | 2 | 100% | 30 min |
| Flash flood warnings | 5 | 4 | 20% | 1 | 100% | 8 min |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS St. Louis, MO: tornado warnings | 45 | 5 | 89% | 16 | 50% | 11 min |
| NWS St. Louis, MO: severe thunderstorm warnings | 214 | 98 | 54% | 378 | 74% | 23 min |
| NWS St. Louis, MO: flash flood warnings | 96 | 41 | 57% | 126 | 83% | 176 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 6, 4:16 AM CST | Wind Chill Warning | LSX | 35 hr |
| Jan 6, 4:16 AM CST | Wind Chill Advisory | LSX | 53 hr |
| Jan 10, 3:10 PM CST | Winter Weather Advisory | LSX | 42 hr |
| Jan 30, 2:23 PM CST | Winter Storm Watch | LSX | 14 hr |
| Jan 31, 3:55 AM CST | Winter Storm Warning | LSX | 41 hr |
| Feb 3, 3:30 PM CST | Winter Weather Advisory | LSX | 24 hr |
| Feb 17, 3:43 PM CST | Wind Chill Advisory | LSX | 43 hr |
| Feb 19, 3:58 PM CST | Winter Weather Advisory | LSX | 42 hr |
| Feb 20, 3:22 PM CST | Winter Storm Warning | LSX | 21 hr |
| Feb 22, 3:36 AM CST | Wind Chill Advisory | LSX | 29 hr |
| Feb 24, 3:50 PM CST | Winter Weather Advisory | LSX | 41 hr |
| Feb 27, 2:41 AM CST | Wind Chill Advisory | LSX | 6 hr |
| Feb 27, 4:12 PM CST | Winter Weather Advisory | LSX | 47 hr |
| Mar 2, 3:58 PM CST | Winter Weather Advisory | LSX | 16 hr |
| Apr 8, 2:43 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 9, 12:58 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 9, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Apr 22, 3:27 PM CDT | Frost Advisory | LSX | 17 hr |
| May 10, 3:52 PM CDT | Mesoscale Discussion | SPC | 68 min |
| May 10, 5:17 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 15, 2:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 24, 4:14 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 7, 1:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 7, 3:33 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 7, 7:19 PM CDT | Severe Thunderstorm Warning | LSX | 41 min |
| Jun 7, 7:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 7, 7:59 PM CDT | Areal Flood Advisory | LSX | 6 hr |
| Jun 7, 9:09 PM CDT | Areal Flood Advisory | LSX | 6 hr |
| Jun 8, 11:11 AM CDT | River Flood Warning | ILX | 63 days |
| Jun 8, 2:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 11, 8:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 8:25 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 11, 10:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 13, 11:37 AM CDT | River Flood Warning | LSX | 52 days |
| Jun 13, 2:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 1:38 AM CDT | River Flood Warning | LSX | 7 days |
| Jun 20, 3:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 3:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 20, 6:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jun 20, 8:55 PM CDT | Severe Thunderstorm Warning | LSX | 65 min |
| Jun 20, 10:12 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 22, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 22, 7:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 22, 7:57 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 22, 8:52 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| Jun 22, 9:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 24, 7:43 PM CDT | River Flood Warning | LSX | 9 days |
| Jun 24, 9:26 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 24, 11:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 11:31 PM CDT | Flash Flood Watch | LSX | 7 hr |
| Jun 25, 2:02 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 25, 4:06 AM CDT | Flash Flood Watch | LSX | 39 hr |
| Jun 25, 3:55 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 26, 11:34 AM CDT | Flash Flood Warning | LSX | 6 hr |
| Jun 28, 1:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jun 28, 3:03 PM CDT | Tornado Watch | SPC | 8 hr |
| Jul 6, 3:55 AM CDT | Flash Flood Watch | LSX | 68 hr |
| Jul 8, 12:39 PM CDT | River Flood Warning | LSX | 4 days |
| Jul 11, 12:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 11, 12:47 PM CDT | Special Weather Statement | LSX | 43 min |
| Jul 11, 1:07 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| Jul 11, 2:08 PM CDT | Special Weather Statement | LSX | 52 min |
| Jul 11, 2:14 PM CDT | Severe Thunderstorm Warning | LSX | 28 min |
| Jul 11, 3:30 PM CDT | Heat Advisory | LSX | 3 days |
| Jul 11, 5:37 PM CDT | Severe Thunderstorm Warning | LSX | 38 min |
| Jul 11, 6:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 11, 6:39 PM CDT | Severe Thunderstorm Warning | LSX | 18 min |
| Jul 11, 7:08 PM CDT | Flash Flood Warning | LSX | 3 hr |
| Jul 11, 8:06 PM CDT | River Flood Warning | LSX | 7 days |
| Jul 11, 9:10 PM CDT | Special Weather Statement | LSX | 50 min |
| Jul 11, 9:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 11, 9:58 PM CDT | Flash Flood Warning | LSX | 6 hr |
| Jul 13, 4:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Jul 13, 6:20 PM CDT | Severe Thunderstorm Warning | LSX | 55 min |
| Jul 13, 6:20 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 13, 6:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 16, 3:46 PM CDT | Heat Advisory | LSX | 3 days |
| Jul 16, 4:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 16, 9:55 PM CDT | Mesoscale Discussion | SPC | 110 min |
| Jul 18, 11:19 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 19, 3:49 AM CDT | Flash Flood Warning | LSX | 6 hr |
| Jul 19, 4:35 AM CDT | Flash Flood Watch | LSX | 11 hr |
| Jul 19, 9:47 AM CDT | Flash Flood Warning | LSX | 6 hr |
| Jul 19, 4:03 PM CDT | Flash Flood Watch | LSX | 20 hr |
| Jul 25, 4:09 PM CDT | Flash Flood Watch | LSX | 20 hr |
| Jul 26, 3:55 PM CDT | Heat Advisory | LSX | 53 hr |
| Jul 29, 1:31 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 6:42 AM CDT | Special Weather Statement | LSX | 48 min |
| Aug 18, 12:49 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 18, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 18, 3:16 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 8, 9:52 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 10, 8:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 18, 5:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 16, 2:36 AM CDT | Frost Advisory | LSX | 29 hr |
| Oct 17, 2:52 AM CDT | Frost Advisory | LSX | 29 hr |
| Oct 18, 4:20 PM CDT | Fire Weather Watch | LSX | 11 hr |
| Oct 19, 3:28 AM CDT | Red Flag Warning | LSX | 16 hr |
| Nov 1, 3:48 AM CST | Dense Fog Advisory | LSX | 4 hr |
| Nov 2, 8:43 PM CST | Dense Fog Advisory | LSX | 13 hr |
| Nov 3, 7:16 PM CST | Dense Fog Advisory | LSX | 15 hr |
| Nov 10, 6:56 PM CST | Wind Advisory | LSX | 35 hr |
| Nov 11, 2:24 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 11, 3:20 PM CST | Tornado Watch | SPC | 6 hr |
| Nov 16, 4:13 AM CST | Flash Flood Watch | LSX | 48 hr |
| Nov 28, 9:31 PM CST | River Flood Warning | ILX | 70 days |
| Dec 23, 12:42 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 23, 1:29 PM CST | Wind Advisory | LSX | 9 hr |
| Dec 23, 1:55 PM CST | Tornado Watch | SPC | 4 hr |
| Dec 23, 3:24 PM CST | Mesoscale Discussion | SPC | 96 min |
| Dec 23, 3:52 PM CST | Severe Thunderstorm Warning | LSX | 38 min |
| Dec 26, 12:35 PM CST | River Flood Warning | LSX | 27 days |
| Dec 27, 2:16 AM CST | River Flood Warning | LSX | 8 days |
| Dec 27, 3:55 PM CST | Wind Advisory | LSX | 23 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 | 9 |
| Severe Thunderstorm Watch | 9 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 36 |
| Special Weather Statement | 4 |
| Flooding | |
| Flash Flood Warning | 5 |
| River Flood Warning | 9 |
| Flash Flood Watch | 7 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 6 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Wind Chill Warning | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20142016
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.