Alert archive / Illinois / Carroll County
Weather alerts in Carroll County, Illinois, 2012
103 weather alerts in 2012, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Carroll County and its neighbors
Each county as a circle sized by its count in 2012. Tap one for its archive.
- Alerts
- 103
- Warnings
- 12
- Watches
- 18
- Advisories
- 31
- Busiest month
- April19 alerts
- Busiest day
- May 15, 20126 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Carroll County, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 1 | 1 | 0% | 4 | 50% | 59 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2012
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 4 | 1 | 75% | 4 | 75% | 23 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 87 | 64 | 26% | 265 | 74% | 30 min |
| NWS Quad Cities, IA: flash flood warnings | 11 | 4 | 64% | 10 | 80% | 85 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, 3:07 PM CST | Wind Advisory | DVN | 315 days |
| Jan 11, 4:02 AM CST | Winter Storm Watch | DVN | 12 hr |
| Jan 11, 4:02 AM CST | Winter Weather Advisory | DVN | 41 hr |
| Jan 12, 11:30 AM CST | Winter Storm Warning | DVN | 9 hr |
| Jan 19, 4:01 AM CST | Winter Storm Watch | DVN | 12 hr |
| Jan 19, 3:35 PM CST | Winter Weather Advisory | DVN | 29 hr |
| Jan 20, 4:12 AM CST | Winter Storm Warning | DVN | 17 hr |
| Jan 22, 8:08 AM CST | Freezing Rain Advisory | DVN | 8 hr |
| Jan 22, 3:20 PM CST | Dense Fog Advisory | DVN | 15 hr |
| Jan 26, 5:01 AM CST | Dense Fog Advisory | DVN | 7 hr |
| Feb 1, 7:31 PM CST | Dense Fog Advisory | DVN | 18 hr |
| Feb 2, 6:06 PM CST | Dense Fog Advisory | DVN | 20 hr |
| Feb 22, 11:12 AM CST | Winter Storm Watch | DVN | 16 hr |
| Feb 23, 11:37 AM CST | Winter Weather Advisory | DVN | 20 hr |
| Feb 23, 8:45 PM CST | Mesoscale Discussion | SPC | 5 hr |
| Feb 28, 3:47 PM CST | Wind Advisory | DVN | 26 hr |
| Mar 2, 3:57 AM CST | Winter Weather Advisory | DVN | 14 hr |
| Mar 2, 11:06 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Mar 24, 3:28 AM CDT | Dense Fog Advisory | DVN | 7 hr |
| Mar 27, 3:58 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 31, 8:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Mar 31, 9:24 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Apr 1, 1:33 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 1, 7:56 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 4, 3:40 PM CDT | Freeze Watch | DVN | 24 hr |
| Apr 5, 3:25 PM CDT | Freeze Warning | DVN | 17 hr |
| Apr 8, 3:29 PM CDT | Freeze Watch | DVN | 22 hr |
| Apr 9, 3:26 AM CDT | Freeze Warning | DVN | 29 hr |
| Apr 10, 3:37 AM CDT | Freeze Warning | DVN | 28 hr |
| Apr 11, 3:46 AM CDT | Freeze Warning | DVN | 28 hr |
| Apr 14, 8:41 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 14, 9:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Apr 15, 3:28 AM CDT | Wind Advisory | DVN | 19 hr |
| Apr 15, 6:12 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Apr 16, 3:35 AM CDT | Wind Advisory | DVN | 11 hr |
| Apr 20, 3:24 PM CDT | Freeze Warning | DVN | 17 hr |
| Apr 22, 3:02 PM CDT | Freeze Warning | DVN | 16 hr |
| Apr 26, 3:41 PM CDT | Frost Advisory | DVN | 16 hr |
| Apr 30, 3:09 AM CDT | Dense Fog Advisory | DVN | 6 hr |
| May 4, 3:31 PM CDT | Flash Flood Watch | DVN | 11 hr |
| May 6, 4:07 AM CDT | Flash Flood Watch | DVN | 16 hr |
| May 6, 9:29 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 15, 2:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 15, 4:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 15, 5:18 PM CDT | Special Weather Statement | DVN | 42 min |
| May 15, 5:56 PM CDT | Special Weather Statement | DVN | 49 min |
| May 15, 6:15 PM CDT | Special Weather Statement | DVN | 30 min |
| May 15, 6:44 PM CDT | Special Weather Statement | DVN | 31 min |
| May 20, 1:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 24, 3:07 AM CDT | Wind Advisory | DVN | 16 hr |
| May 26, 3:02 AM CDT | Special Weather Statement | DVN | 58 min |
| May 28, 4:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 2, 1:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jun 16, 12:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 16, 2:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 16, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 18, 3:44 AM CDT | Wind Advisory | DVN | 15 hr |
| Jun 18, 1:11 PM CDT | Heat Advisory | DVN | 14 hr |
| Jun 26, 3:23 PM CDT | Excessive Heat Watch | DVN | 24 hr |
| Jun 27, 3:21 PM CDT | Heat Advisory | DVN | 53 hr |
| Jun 29, 9:39 AM CDT | Special Weather Statement | DVN | 51 min |
| Jun 29, 7:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 2, 3:08 PM CDT | Heat Advisory | DVN | 36 hr |
| Jul 4, 3:23 AM CDT | Excessive Heat Warning | DVN | 4 days |
| Jul 7, 4:20 PM CDT | Special Weather Statement | DVN | 55 min |
| Jul 7, 4:55 PM CDT | Special Weather Statement | DVN | 65 min |
| Jul 16, 3:01 PM CDT | Heat Advisory | DVN | 52 hr |
| Jul 18, 11:38 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 18, 12:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 18, 3:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jul 24, 3:32 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Jul 24, 4:09 AM CDT | Heat Advisory | DVN | 40 hr |
| Jul 25, 8:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jul 25, 8:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 11:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 4, 10:26 AM CDT | Mesoscale Discussion | SPC | 49 min |
| Aug 4, 10:50 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 1:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 4, 1:36 PM CDT | Severe Thunderstorm Warning | DVN | 84 min |
| Aug 16, 3:57 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 12:03 AM CDT | Dense Fog Advisory | DVN | 10 hr |
| Sep 4, 8:51 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 5, 1:14 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Sep 5, 3:43 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Sep 5, 4:02 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Sep 14, 3:34 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Sep 17, 1:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Sep 17, 2:15 PM CDT | Special Weather Statement | DVN | 60 min |
| Sep 21, 2:50 PM CDT | Freeze Watch | DVN | 25 hr |
| Sep 22, 3:55 PM CDT | Frost Advisory | DVN | 16 hr |
| Sep 23, 3:44 PM CDT | Frost Advisory | DVN | 15 hr |
| Oct 4, 12:13 PM CDT | Special Weather Statement | DVN | 62 min |
| Oct 22, 8:41 AM CDT | Special Weather Statement | DVN | 79 min |
| Oct 22, 9:32 AM CDT | Special Weather Statement | DVN | 58 min |
| Nov 20, 4:23 PM CST | Dense Fog Advisory | DVN | 21 hr |
| Nov 23, 5:08 AM CST | Wind Advisory | DVN | 7 hr |
| Dec 2, 6:56 PM CST | Dense Fog Advisory | DVN | 13 hr |
| Dec 3, 3:29 PM CST | Mesoscale Discussion | SPC | 91 min |
| Dec 17, 3:53 PM CST | Winter Storm Watch | DVN | 48 hr |
| Dec 19, 4:09 AM CST | Blizzard Warning | DVN | 44 hr |
| Dec 19, 4:09 AM CST | Winter Storm Warning | DVN | 44 hr |
| Dec 20, 10:52 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Dec 21, 12:06 AM CST | Winter Weather Advisory | DVN | 10 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 | 1 |
| Severe Thunderstorm Watch | 8 |
| Mesoscale Discussion | 30 |
| Special Weather Statement | 12 |
| Flooding | |
| Flash Flood Watch | 2 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 4 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 5 |
| Cold | |
| Freeze Warning | 6 |
| Freeze Watch | 3 |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 10 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20112013
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.