Alert archive / Iowa / Shelby County
Weather alerts in Shelby County, Iowa, 2014
173 weather alerts in 2014, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Shelby County and its neighbors
Each county as a circle sized by its count in 2014. Tap one for its archive.
- Alerts
- 173
- Warnings
- 44
- Watches
- 31
- Advisories
- 42
- Busiest month
- June65 alerts
- Busiest day
- June 30, 201417 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 1 tornado warnings covering Shelby County in 2014 had a tornado report inside them.
Shelby County, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 30 | 18 | 40% | 16 | 100% | 23 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 64 min |
Each office's whole area, 2014
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Omaha, NE: tornado warnings | 29 | 15 | 48% | 36 | 81% | 16 min |
| NWS Omaha, NE: severe thunderstorm warnings | 359 | 166 | 54% | 384 | 89% | 20 min |
| NWS Omaha, NE: flash flood warnings | 35 | 18 | 49% | 30 | 87% | 73 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, 3:23 PM CST | Wind Chill Advisory | OAX | 16 hr |
| Jan 3, 2:29 PM CST | Wind Chill Watch | OAX | 25 hr |
| Jan 4, 3:14 PM CST | Wind Chill Warning | OAX | 45 hr |
| Jan 6, 12:10 PM CST | Wind Chill Warning | OAX | 3 hr |
| Jan 6, 12:10 PM CST | Wind Chill Advisory | OAX | 12 hr |
| Jan 13, 3:48 PM CST | Wind Advisory | OAX | 26 hr |
| Jan 14, 3:45 PM CST | High Wind Watch | OAX | 24 hr |
| Jan 15, 3:33 PM CST | High Wind Warning | OAX | 26 hr |
| Jan 16, 1:47 PM CST | Special Weather Statement | OAX | 43 min |
| Jan 16, 5:25 PM CST | Wind Advisory | OAX | 5 hr |
| Jan 17, 3:21 PM CST | Wind Advisory | OAX | 26 hr |
| Jan 20, 3:46 AM CST | Wind Advisory | OAX | 17 hr |
| Jan 20, 9:05 PM CST | Wind Chill Advisory | OAX | 10 hr |
| Jan 22, 3:19 AM CST | Wind Chill Advisory | OAX | 31 hr |
| Jan 25, 3:45 AM CST | High Wind Watch | OAX | 24 hr |
| Jan 26, 3:45 AM CST | High Wind Warning | OAX | 17 hr |
| Jan 26, 3:45 AM CST | Wind Advisory | OAX | 20 hr |
| Jan 26, 3:59 AM CST | Wind Chill Advisory | OAX | 30 hr |
| Feb 3, 1:32 PM CST | Winter Weather Advisory | OAX | 37 hr |
| Feb 4, 3:13 AM CST | Wind Chill Advisory | OAX | 32 hr |
| Feb 5, 3:27 PM CST | Wind Chill Advisory | OAX | 20 hr |
| Feb 16, 3:45 PM CST | Winter Weather Advisory | OAX | 16 hr |
| Feb 19, 3:54 PM CST | Winter Weather Advisory | OAX | 23 hr |
| Feb 19, 4:24 PM CST | Wind Advisory | OAX | 26 hr |
| Feb 20, 3:51 AM CST | Winter Storm Warning | OAX | 11 hr |
| Feb 20, 11:20 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 28, 3:28 PM CST | Winter Weather Advisory | OAX | 27 hr |
| Mar 1, 3:51 AM CST | Wind Chill Watch | OAX | 12 hr |
| Mar 1, 3:30 PM CST | Wind Chill Warning | OAX | 20 hr |
| Mar 1, 3:30 PM CST | Wind Chill Advisory | OAX | 20 hr |
| Mar 2, 3:47 PM CST | Wind Chill Advisory | OAX | 18 hr |
| Mar 10, 3:36 PM CDT | Wind Advisory | OAX | 29 hr |
| Mar 16, 3:30 PM CDT | Fire Weather Watch | OAX | 26 hr |
| Mar 25, 3:34 PM CDT | Wind Advisory | OAX | 28 hr |
| Mar 30, 3:47 PM CDT | Wind Advisory | OAX | 35 hr |
| Mar 31, 3:34 AM CDT | Red Flag Warning | OAX | 12 hr |
| Apr 8, 4:10 AM CDT | Fire Weather Watch | OAX | 11 hr |
| Apr 8, 3:31 PM CDT | Red Flag Warning | OAX | 27 hr |
| Apr 12, 2:30 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 12, 3:15 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 12, 6:20 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Apr 12, 8:31 PM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Apr 12, 9:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Apr 12, 9:18 PM CDT | Special Weather Statement | OAX | 42 min |
| Apr 12, 9:22 PM CDT | Severe Thunderstorm Warning | OAX | 38 min |
| Apr 13, 9:19 AM CDT | Wind Advisory | OAX | 12 hr |
| Apr 13, 1:16 PM CDT | Mesoscale Discussion | SPC | 6 hr |
| Apr 16, 4:05 AM CDT | Red Flag Warning | OAX | 14 hr |
| Apr 16, 4:10 AM CDT | Wind Advisory | OAX | 16 hr |
| Apr 22, 3:43 PM CDT | Wind Advisory | OAX | 27 hr |
| Apr 28, 12:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 7, 7:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 7, 8:18 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 7, 8:53 PM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| May 7, 9:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 8, 12:52 AM CDT | Special Weather Statement | OAX | 23 min |
| May 8, 12:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 8, 1:46 PM CDT | Tornado Watch | SPC | 7 hr |
| May 8, 5:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 10, 3:42 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 11, 9:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| May 11, 2:21 PM CDT | Tornado Watch | SPC | 8 hr |
| May 11, 3:05 PM CDT | Flash Flood Watch | OAX | 10 hr |
| May 11, 6:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 11, 8:08 PM CDT | Severe Thunderstorm Warning | OAX | 52 min |
| May 11, 9:31 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 15, 3:28 PM CDT | Frost Advisory | OAX | 16 hr |
| May 16, 3:15 PM CDT | Frost Advisory | OAX | 16 hr |
| May 20, 3:54 PM CDT | Special Weather Statement | OAX | 51 min |
| May 20, 4:19 PM CDT | Severe Thunderstorm Warning | OAX | 41 min |
| May 20, 5:49 PM CDT | Mesoscale Discussion | SPC | 86 min |
| May 20, 6:52 PM CDT | Severe Thunderstorm Warning | OAX | 38 min |
| Jun 1, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 1, 3:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 1, 4:32 PM CDT | Severe Thunderstorm Warning | OAX | 28 min |
| Jun 1, 4:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Jun 1, 4:53 PM CDT | Severe Thunderstorm Warning | OAX | 37 min |
| Jun 1, 5:26 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Jun 3, 3:51 AM CDT | Flash Flood Watch | OAX | 23 hr |
| Jun 3, 1:12 PM CDT | Tornado Watch | SPC | 10 hr |
| Jun 3, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 3, 4:15 PM CDT | Severe Thunderstorm Warning | OAX | 30 min |
| Jun 3, 4:18 PM CDT | Severe Thunderstorm Warning | OAX | 27 min |
| Jun 3, 4:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jun 3, 4:41 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Jun 3, 5:39 PM CDT | Areal Flood Advisory | OAX | 6 hr |
| Jun 3, 8:41 PM CDT | Areal Flood Advisory | OAX | 6 hr |
| Jun 5, 1:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 5, 4:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 5, 4:55 PM CDT | Tornado Watch | SPC | 4 hr |
| Jun 14, 11:46 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 1:10 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 15, 2:18 AM CDT | Special Weather Statement | OAX | 42 min |
| Jun 15, 3:00 AM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 16, 7:12 AM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 16, 10:19 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jun 16, 12:41 PM CDT | Severe Thunderstorm Warning | OAX | 49 min |
| Jun 16, 3:07 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 16, 9:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 16, 9:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 16, 11:11 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Jun 17, 12:02 AM CDT | Special Weather Statement | OAX | 43 min |
| Jun 19, 1:03 PM CDT | Special Weather Statement | OAX | 27 min |
| Jun 19, 1:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 20, 3:47 AM CDT | Dense Fog Advisory | OAX | 4 hr |
| Jun 20, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 20, 5:44 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 20, 7:01 PM CDT | Special Weather Statement | OAX | 44 min |
| Jun 20, 7:43 PM CDT | Severe Thunderstorm Warning | OAX | 47 min |
| Jun 20, 8:03 PM CDT | Severe Thunderstorm Warning | OAX | 42 min |
| Jun 20, 8:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 20, 8:38 PM CDT | Severe Thunderstorm Warning | OAX | 52 min |
| Jun 20, 11:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 26, 2:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 3:31 PM CDT | Flash Flood Watch | OAX | 17 hr |
| Jun 29, 2:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 29, 4:04 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 29, 5:52 PM CDT | Severe Thunderstorm Warning | OAX | 23 min |
| Jun 29, 6:06 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 29, 6:13 PM CDT | Severe Thunderstorm Warning | OAX | 47 min |
| Jun 29, 8:09 PM CDT | Tornado Warning | OAX | 20 min |
| Jun 30, 2:56 AM CDT | Flash Flood Watch | OAX | 10 hr |
| Jun 30, 3:32 AM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 30, 4:06 AM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 30, 7:16 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 30, 8:16 AM CDT | Severe Thunderstorm Warning | OAX | 44 min |
| Jun 30, 8:45 AM CDT | Severe Thunderstorm Warning | OAX | 45 min |
| Jun 30, 8:57 AM CDT | Severe Thunderstorm Warning | OAX | 33 min |
| Jun 30, 9:28 AM CDT | Severe Thunderstorm Warning | OAX | 34 min |
| Jun 30, 9:38 AM CDT | Tornado Watch | SPC | 10 hr |
| Jun 30, 9:39 AM CDT | Severe Thunderstorm Warning | OAX | 23 min |
| Jun 30, 10:48 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 30, 11:10 AM CDT | Severe Thunderstorm Warning | OAX | 65 min |
| Jun 30, 11:36 AM CDT | Severe Thunderstorm Warning | OAX | 39 min |
| Jun 30, 11:56 AM CDT | Flash Flood Warning | OAX | 3 hr |
| Jun 30, 1:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jun 30, 3:03 PM CDT | Areal Flood Advisory | OAX | 3 hr |
| Jul 5, 1:54 AM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 5, 4:15 AM CDT | Severe Thunderstorm Warning | OAX | 45 min |
| Jul 5, 4:34 AM CDT | Severe Thunderstorm Warning | OAX | 21 min |
| Jul 12, 3:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 20, 3:08 PM CDT | Heat Advisory | OAX | 53 hr |
| Jul 26, 9:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 3, 1:41 AM CDT | Special Weather Statement | OAX | 49 min |
| Aug 20, 2:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 26, 12:50 AM CDT | Special Weather Statement | OAX | 40 min |
| Aug 26, 1:14 AM CDT | Areal Flood Advisory | OAX | 3 hr |
| Aug 26, 3:20 PM CDT | Flash Flood Watch | OAX | 19 hr |
| Aug 27, 11:29 PM CDT | Flash Flood Watch | OAX | 11 hr |
| Aug 28, 7:15 AM CDT | Areal Flood Advisory | OAX | 2 hr |
| Aug 31, 2:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 31, 3:31 PM CDT | Tornado Watch | SPC | 5 hr |
| Aug 31, 6:07 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Aug 31, 7:25 PM CDT | Severe Thunderstorm Warning | OAX | 50 min |
| Aug 31, 7:31 PM CDT | Areal Flood Advisory | OAX | 5 hr |
| Aug 31, 7:59 PM CDT | Severe Thunderstorm Warning | OAX | 46 min |
| Sep 1, 5:33 AM CDT | Areal Flood Warning | OAX | 6 hr |
| Sep 9, 12:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Sep 9, 3:34 PM CDT | Tornado Watch | SPC | 8 hr |
| Sep 9, 3:40 PM CDT | Flash Flood Watch | OAX | 11 hr |
| Sep 9, 4:02 PM CDT | Severe Thunderstorm Warning | OAX | 43 min |
| Sep 9, 5:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Sep 12, 3:39 PM CDT | Frost Advisory | OAX | 17 hr |
| Sep 30, 5:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Oct 3, 3:46 AM CDT | Freeze Watch | OAX | 11 hr |
| Oct 3, 3:15 PM CDT | Freeze Warning | OAX | 17 hr |
| Oct 10, 2:55 PM CDT | Freeze Warning | OAX | 18 hr |
| Nov 7, 3:25 PM CST | Wind Advisory | OAX | 12 hr |
| Nov 10, 4:25 AM CST | Wind Advisory | OAX | 23 hr |
| Nov 14, 3:34 AM CST | Winter Weather Advisory | OAX | 44 hr |
| Dec 5, 4:12 AM CST | Dense Fog Advisory | OAX | 6 hr |
| Dec 15, 3:52 PM CST | Wind Advisory | OAX | 14 hr |
| Dec 30, 3:37 PM CST | Wind Chill Advisory | OAX | 18 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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.