Alert archive / Illinois / Rock Island County
Weather alerts in Rock Island County, Illinois, 2016
130 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Rock Island County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 130
- Warnings
- 39
- Watches
- 23
- Advisories
- 28
- Busiest month
- July19 alerts
- Busiest day
- March 15, 20167 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 6 tornado warnings covering Rock Island County in 2016 had a tornado report inside them; 1 of 2 tornado reports fell inside a warning, on average 18 minutes after it went out.
Rock Island County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 6 | 2 | 67% | 2 | 50% | 18 min |
| Severe thunderstorm warnings | 14 | 13 | 7% | 12 | 50% | 29 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 31 | 16 | 48% | 33 | 61% | 18 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 90 | 70 | 22% | 249 | 71% | 24 min |
| NWS Quad Cities, IA: flash flood warnings | 29 | 18 | 38% | 44 | 75% | 87 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 8, 6:21 AM CST | Dense Fog Advisory | DVN | 17 hr |
| Jan 9, 3:22 AM CST | Wind Chill Advisory | DVN | 33 hr |
| Jan 16, 3:14 PM CST | Wind Chill Advisory | DVN | 45 hr |
| Jan 19, 12:26 PM CST | River Flood Warning | DVN | 13 days |
| Feb 1, 3:48 AM CST | Winter Weather Advisory | DVN | 35 hr |
| Feb 1, 10:03 AM CST | Dense Fog Advisory | DVN | 4 hr |
| Feb 1, 9:14 PM CST | Dense Fog Advisory | DVN | 6 hr |
| Feb 2, 5:31 PM CST | Dense Fog Advisory | DVN | 9 hr |
| Feb 13, 3:38 AM CST | Winter Weather Advisory | DVN | 38 hr |
| Feb 15, 4:30 AM CST | Dense Fog Advisory | DVN | 6 hr |
| Feb 18, 3:49 PM CST | Wind Advisory | DVN | 26 hr |
| Feb 19, 9:55 AM CST | High Wind Warning | DVN | 8 hr |
| Mar 2, 2:48 PM CST | Winter Weather Advisory | DVN | 12 hr |
| Mar 15, 3:48 AM CDT | High Wind Watch | DVN | 12 hr |
| Mar 15, 6:56 AM CDT | Special Weather Statement | DVN | 94 min |
| Mar 15, 2:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Mar 15, 3:27 PM CDT | Wind Advisory | DVN | 29 hr |
| Mar 15, 3:31 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 15, 6:26 PM CDT | Severe Thunderstorm Warning | DVN | 49 min |
| Mar 15, 6:50 PM CDT | Severe Thunderstorm Warning | DVN | 55 min |
| Mar 15, 7:11 PM CDT | Tornado Warning | DVN | 49 min |
| Mar 15, 7:31 PM CDT | Tornado Warning | DVN | 44 min |
| Mar 23, 11:23 PM CDT | Special Weather Statement | DVN | 22 min |
| Mar 23, 11:48 PM CDT | Special Weather Statement | DVN | 42 min |
| Mar 24, 12:24 PM CDT | River Flood Warning | DVN | 5 days |
| Mar 24, 12:24 PM CDT | River Flood Warning | DVN | 6 days |
| Mar 24, 3:15 PM CDT | River Flood Warning | DVN | 6 days |
| Mar 24, 3:15 PM CDT | River Flood Warning | DVN | 7 days |
| Mar 31, 10:13 AM CDT | Special Weather Statement | DVN | 47 min |
| Mar 31, 10:46 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Apr 1, 3:28 PM CDT | Wind Advisory | DVN | 28 hr |
| Apr 3, 4:18 AM CDT | Wind Advisory | DVN | 17 hr |
| Apr 7, 3:45 PM CDT | Freeze Watch | DVN | 12 hr |
| Apr 8, 3:16 AM CDT | Freeze Warning | DVN | 30 hr |
| Apr 11, 9:42 AM CDT | Freeze Warning | DVN | 23 hr |
| Apr 21, 3:42 AM CDT | Dense Fog Advisory | DVN | 5 hr |
| Apr 21, 12:22 PM CDT | Special Weather Statement | DVN | 23 min |
| Apr 21, 1:18 PM CDT | Special Weather Statement | DVN | 117 min |
| Apr 21, 1:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 25, 2:17 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 10, 1:01 PM CDT | Special Weather Statement | DVN | 59 min |
| May 11, 4:31 AM CDT | Dense Fog Advisory | DVN | 5 hr |
| May 14, 3:47 AM CDT | Frost Advisory | DVN | 28 hr |
| May 26, 6:15 AM CDT | Special Weather Statement | DVN | 45 min |
| May 28, 12:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 28, 1:37 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 28, 3:44 PM CDT | Special Weather Statement | DVN | 46 min |
| May 28, 4:25 PM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| May 28, 5:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 31, 3:50 PM CDT | Special Weather Statement | DVN | 25 min |
| Jun 14, 3:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 14, 6:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 21, 2:33 PM CDT | Flash Flood Watch | DVN | 19 hr |
| Jun 21, 11:18 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 3:02 AM CDT | Severe Thunderstorm Warning | DVN | 43 min |
| Jun 22, 3:38 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jun 22, 6:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 26, 4:19 AM CDT | Special Weather Statement | DVN | 41 min |
| Jun 30, 1:29 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 5, 9:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 1:27 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 3:06 AM CDT | Severe Thunderstorm Warning | DVN | 54 min |
| Jul 6, 3:09 AM CDT | Severe Thunderstorm Warning | DVN | 51 min |
| Jul 6, 3:46 AM CDT | Severe Thunderstorm Warning | DVN | 59 min |
| Jul 6, 5:17 AM CDT | Special Weather Statement | DVN | 88 min |
| Jul 13, 2:37 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 13, 2:45 PM CDT | Severe Thunderstorm Warning | DVN | 60 min |
| Jul 13, 3:12 PM CDT | Special Weather Statement | DVN | 63 min |
| Jul 13, 3:48 PM CDT | Severe Thunderstorm Warning | DVN | 57 min |
| Jul 17, 6:14 AM CDT | Severe Thunderstorm Warning | DVN | 61 min |
| Jul 17, 6:36 AM CDT | Tornado Warning | DVN | 24 min |
| Jul 17, 7:00 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 3:37 PM CDT | Excessive Heat Watch | DVN | 44 hr |
| Jul 20, 4:00 AM CDT | Excessive Heat Warning | DVN | 4 days |
| Jul 21, 6:18 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 21, 11:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 23, 3:23 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 4:08 AM CDT | Excessive Heat Warning | DVN | 15 hr |
| Aug 4, 4:44 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 4, 8:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Aug 4, 8:43 PM CDT | Severe Thunderstorm Warning | DVN | 62 min |
| Aug 11, 3:08 AM CDT | Flash Flood Watch | DVN | 30 hr |
| Aug 11, 11:02 AM CDT | Special Weather Statement | DVN | 58 min |
| Aug 11, 11:13 AM CDT | Severe Thunderstorm Warning | DVN | 62 min |
| Aug 11, 11:44 AM CDT | Severe Thunderstorm Warning | DVN | 36 min |
| Aug 11, 8:57 PM CDT | Special Weather Statement | DVN | 93 min |
| Aug 11, 9:07 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 11, 10:33 PM CDT | Special Weather Statement | DVN | 87 min |
| Aug 11, 11:53 PM CDT | Special Weather Statement | DVN | 67 min |
| Aug 12, 2:29 AM CDT | Special Weather Statement | DVN | 2 hr |
| Aug 12, 10:05 AM CDT | Areal Flood Warning | DVN | 9 hr |
| Aug 24, 4:05 AM CDT | Flash Flood Watch | DVN | 23 hr |
| Aug 24, 8:54 PM CDT | Special Weather Statement | DVN | 66 min |
| Aug 26, 10:46 PM CDT | Special Weather Statement | DVN | 119 min |
| Aug 27, 1:11 AM CDT | Special Weather Statement | DVN | 2 hr |
| Sep 6, 3:25 PM CDT | Flash Flood Watch | DVN | 39 hr |
| Sep 7, 1:00 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 7, 2:50 PM CDT | Special Weather Statement | DVN | 40 min |
| Sep 19, 2:55 PM CDT | Tornado Watch | SPC | 4 hr |
| Sep 19, 5:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 21, 2:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 22, 12:04 PM CDT | River Flood Watch | DVN | 24 hr |
| Sep 22, 12:04 PM CDT | River Flood Watch | DVN | 24 hr |
| Sep 22, 12:04 PM CDT | River Flood Watch | DVN | 24 hr |
| Sep 22, 12:04 PM CDT | River Flood Watch | DVN | 24 hr |
| Sep 22, 12:04 PM CDT | River Flood Watch | DVN | 24 hr |
| Sep 23, 11:56 AM CDT | River Flood Warning | DVN | 12 days |
| Sep 23, 11:56 AM CDT | River Flood Warning | DVN | 11 days |
| Sep 23, 11:56 AM CDT | River Flood Warning | DVN | 13 days |
| Sep 23, 11:56 AM CDT | River Flood Warning | DVN | 14 days |
| Sep 23, 11:56 AM CDT | River Flood Warning | DVN | 15 days |
| Oct 6, 10:08 PM CDT | Severe Thunderstorm Warning | DVN | 52 min |
| Oct 6, 10:33 PM CDT | Tornado Warning | DVN | 27 min |
| Oct 6, 10:42 PM CDT | Tornado Warning | DVN | 24 min |
| Oct 6, 10:55 PM CDT | Tornado Warning | DVN | 35 min |
| Oct 20, 2:17 PM CDT | Frost Advisory | DVN | 18 hr |
| Nov 1, 11:46 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 4, 3:48 AM CDT | Dense Fog Advisory | DVN | 8 hr |
| Nov 18, 11:12 AM CST | Wind Advisory | DVN | 25 hr |
| Dec 3, 2:44 PM CST | Winter Weather Advisory | DVN | 24 hr |
| Dec 4, 10:27 AM CST | Winter Storm Warning | DVN | 5 hr |
| Dec 5, 3:47 AM CST | Dense Fog Advisory | DVN | 9 hr |
| Dec 6, 6:03 AM CST | Dense Fog Advisory | DVN | 5 hr |
| Dec 9, 11:09 AM CST | Winter Weather Advisory | DVN | 58 hr |
| Dec 14, 3:05 AM CST | Wind Chill Advisory | DVN | 31 hr |
| Dec 15, 11:34 AM CST | Winter Weather Advisory | DVN | 60 hr |
| Dec 16, 3:37 PM CST | Wind Chill Advisory | DVN | 66 hr |
| Dec 23, 7:41 PM CST | River Flood Warning | DVN | 7 days |
| Dec 29, 3:34 AM CST | Wind Advisory | DVN | 13 hr |
| Dec 30, 8:04 PM CST | River Flood Warning | DVN | 64 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 | 14 |
| Tornado Warning | 6 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 22 |
| Flooding | |
| Areal Flood Warning | 1 |
| River Flood Warning | 12 |
| Flash Flood Watch | 4 |
| River Flood Watch | 5 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 6 |
| Heat | |
| Excessive Heat Warning | 2 |
| Excessive Heat Watch | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 6 |
| 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 archive20152017
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.