Alert archive / Iowa / Jefferson County
Weather alerts in Jefferson County, Iowa, 2014
131 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Jefferson County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 131
- Warnings
- 17
- Watches
- 22
- Advisories
- 31
- Busiest month
- May25 alerts
- Busiest day
- May 11, 201412 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 2 tornado warnings covering Jefferson County in 2014 had a tornado report inside them.
Jefferson County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 10 | 8 | 20% | 7 | 86% | 22 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Quad Cities, IA: tornado warnings | 19 | 3 | 84% | 13 | 23% | 12 min |
| NWS Quad Cities, IA: severe thunderstorm warnings | 132 | 98 | 26% | 373 | 74% | 20 min |
| NWS Quad Cities, IA: flash flood warnings | 23 | 18 | 22% | 64 | 89% | 115 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, 4:15 PM CST | Wind Chill Advisory | DVN | 10 hr |
| Jan 2, 3:24 AM CST | Wind Chill Advisory | DVN | 32 hr |
| Jan 3, 3:50 PM CST | Wind Chill Watch | DVN | 11 hr |
| Jan 4, 3:06 AM CST | Wind Chill Warning | DVN | 3 days |
| Jan 7, 3:17 AM CST | Wind Chill Advisory | DVN | 7 hr |
| Jan 10, 7:42 PM CST | Dense Fog Advisory | DVN | 8 hr |
| Jan 14, 4:00 AM CST | Wind Advisory | DVN | 13 hr |
| Jan 16, 10:47 AM CST | Wind Advisory | DVN | 9 hr |
| Jan 16, 4:48 PM CST | Winter Weather Advisory | DVN | 4 hr |
| Jan 20, 3:57 AM CST | Wind Chill Advisory | DVN | 32 hr |
| Jan 22, 3:21 AM CST | Wind Chill Advisory | DVN | 52 hr |
| Jan 24, 2:56 PM CST | Winter Storm Watch | DVN | 24 hr |
| Jan 25, 3:24 PM CST | Wind Chill Advisory | DVN | 64 hr |
| Jan 26, 3:12 PM CST | Wind Advisory | DVN | 9 hr |
| Jan 30, 3:53 PM CST | Winter Storm Watch | DVN | 12 hr |
| Jan 31, 3:31 AM CST | Winter Weather Advisory | DVN | 31 hr |
| Jan 31, 3:06 PM CST | Winter Storm Warning | DVN | 20 hr |
| Feb 3, 3:48 AM CST | Winter Storm Watch | DVN | 11 hr |
| Feb 3, 2:47 PM CST | Winter Storm Warning | DVN | 45 hr |
| Feb 5, 2:42 PM CST | Wind Chill Advisory | DVN | 21 hr |
| Feb 6, 3:05 PM CST | Wind Chill Advisory | DVN | 19 hr |
| Feb 9, 3:22 AM CST | Wind Chill Advisory | DVN | 32 hr |
| Feb 14, 9:32 AM CST | Special Weather Statement | DVN | 88 min |
| Feb 16, 3:54 AM CST | Winter Weather Advisory | DVN | 34 hr |
| Feb 19, 3:26 PM CST | Flood Watch | DVN | 24 hr |
| Feb 19, 8:53 PM CST | Wind Advisory | DVN | 42 hr |
| Feb 20, 10:20 AM CST | Mesoscale Discussion | SPC | 85 min |
| Feb 20, 1:15 PM CST | Special Weather Statement | DVN | 60 min |
| Feb 28, 2:49 PM CST | Winter Weather Advisory | DVN | 39 hr |
| Mar 2, 3:51 AM CST | Wind Chill Advisory | DVN | 8 hr |
| Mar 2, 3:44 PM CST | Wind Chill Advisory | DVN | 17 hr |
| Mar 31, 6:43 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 31, 6:57 PM CDT | Special Weather Statement | DVN | 48 min |
| Apr 3, 1:05 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Apr 3, 2:59 AM CDT | Special Weather Statement | DVN | 2 hr |
| Apr 9, 3:27 AM CDT | Red Flag Warning | DVN | 16 hr |
| Apr 12, 9:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 12, 11:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 12, 11:50 PM CDT | Severe Thunderstorm Warning | DVN | 55 min |
| Apr 13, 7:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 1:27 PM CDT | Flood Watch | DVN | 14 hr |
| Apr 27, 1:59 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 27, 2:13 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 27, 2:47 PM CDT | Flood Watch | DVN | 27 hr |
| Apr 27, 3:13 PM CDT | Special Weather Statement | DVN | 47 min |
| Apr 27, 3:23 PM CDT | Severe Thunderstorm Warning | DVN | 67 min |
| Apr 27, 4:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Apr 27, 8:42 PM CDT | Special Weather Statement | DVN | 108 min |
| Apr 28, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 28, 1:11 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 28, 3:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 8, 8:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 11, 9:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| May 11, 10:47 AM CDT | Mesoscale Discussion | SPC | 118 min |
| May 11, 11:53 AM CDT | Tornado Watch | SPC | 7 hr |
| May 11, 12:51 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 11, 2:24 PM CDT | Severe Thunderstorm Warning | DVN | 51 min |
| May 11, 2:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 11, 2:55 PM CDT | Tornado Warning | DVN | 35 min |
| May 11, 3:25 PM CDT | Severe Thunderstorm Warning | DVN | 50 min |
| May 11, 3:32 PM CDT | Tornado Warning | DVN | 28 min |
| May 11, 3:36 PM CDT | Severe Thunderstorm Warning | DVN | 39 min |
| May 11, 4:18 PM CDT | Severe Thunderstorm Warning | DVN | 42 min |
| May 11, 5:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 12, 9:08 AM CDT | Special Weather Statement | DVN | 67 min |
| May 12, 11:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 1:00 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 12, 2:20 PM CDT | Special Weather Statement | DVN | 70 min |
| May 12, 3:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 12, 4:24 PM CDT | Severe Thunderstorm Warning | DVN | 51 min |
| May 12, 4:48 PM CDT | Severe Thunderstorm Warning | DVN | 42 min |
| May 12, 7:26 PM CDT | Mesoscale Discussion | SPC | 64 min |
| May 16, 2:07 PM CDT | Frost Advisory | DVN | 17 hr |
| May 20, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 21, 1:27 AM CDT | Mesoscale Discussion | SPC | 93 min |
| May 28, 1:55 PM CDT | Special Weather Statement | DVN | 50 min |
| Jun 3, 3:33 AM CDT | Flash Flood Watch | DVN | 27 hr |
| Jun 3, 4:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 4, 4:27 AM CDT | Special Weather Statement | DVN | 48 min |
| Jun 16, 2:19 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 16, 2:51 PM CDT | Severe Thunderstorm Warning | DVN | 39 min |
| Jun 16, 3:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 17, 1:29 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 18, 10:36 AM CDT | Special Weather Statement | DVN | 54 min |
| Jun 18, 11:34 AM CDT | Special Weather Statement | DVN | 56 min |
| Jun 20, 5:16 AM CDT | Special Weather Statement | DVN | 3 hr |
| Jun 22, 11:19 AM CDT | Mesoscale Discussion | SPC | 101 min |
| Jun 22, 11:54 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 2:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 26, 2:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 2:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 28, 6:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 29, 11:12 PM CDT | Flash Flood Watch | DVN | 26 hr |
| Jun 30, 1:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 30, 2:03 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 30, 3:25 PM CDT | Mesoscale Discussion | SPC | 35 min |
| Jun 30, 7:26 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 11:05 PM CDT | Severe Thunderstorm Warning | DVN | 55 min |
| Jul 12, 3:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 12, 4:58 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 12, 7:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 12, 9:09 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 22, 3:43 AM CDT | Heat Advisory | DVN | 15 hr |
| Jul 22, 7:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 22, 7:48 AM CDT | Special Weather Statement | DVN | 57 min |
| Jul 22, 8:24 AM CDT | Special Weather Statement | DVN | 51 min |
| Aug 17, 4:49 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Aug 18, 4:43 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Aug 23, 7:09 AM CDT | Special Weather Statement | DVN | 66 min |
| Aug 23, 7:48 AM CDT | Special Weather Statement | DVN | 57 min |
| Aug 24, 4:39 AM CDT | Special Weather Statement | DVN | 3 hr |
| Aug 24, 5:02 AM CDT | Dense Fog Advisory | DVN | 4 hr |
| Aug 24, 6:37 AM CDT | Special Weather Statement | DVN | 113 min |
| Aug 28, 1:12 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 29, 3:02 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 9:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 31, 9:45 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 1, 1:01 AM CDT | Special Weather Statement | DVN | 59 min |
| Sep 9, 3:13 AM CDT | Flash Flood Watch | DVN | 30 hr |
| Sep 15, 7:40 AM CDT | Special Weather Statement | DVN | 50 min |
| Sep 20, 6:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 2, 5:48 AM CDT | Special Weather Statement | DVN | 117 min |
| Oct 10, 3:46 PM CDT | Frost Advisory | DVN | 17 hr |
| Oct 23, 3:12 PM CDT | Dense Fog Advisory | DVN | 21 hr |
| Oct 24, 8:58 PM CDT | Dense Fog Advisory | DVN | 12 hr |
| Oct 30, 3:17 PM CDT | Freeze Warning | DVN | 42 hr |
| Nov 6, 5:03 AM CST | Special Weather Statement | DVN | 3 hr |
| Nov 14, 3:17 PM CST | Winter Weather Advisory | DVN | 33 hr |
| Nov 21, 4:24 AM CST | Freezing Rain Advisory | DVN | 26 hr |
| Dec 5, 1:33 AM CST | Dense Fog 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 | 10 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 38 |
| Special Weather Statement | 23 |
| Flooding | |
| Flash Flood Watch | 3 |
| Flood Watch | 3 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 3 |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 11 |
| Wind and dust | |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20132015
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.