Alert archive / Pennsylvania / York County
Weather alerts in York County, Pennsylvania, 2011
312 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
York County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 312
- Warnings
- 105
- Watches
- 44
- Advisories
- 56
- Busiest month
- April58 alerts
- Busiest day
- April 28, 201124 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
3 of 12 tornado warnings covering York County in 2011 had a tornado report inside them; 4 of 4 tornado reports fell inside a warning, on average 15 minutes after it went out.
York County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 12 | 3 | 75% | 4 | 100% | 15 min |
| Severe thunderstorm warnings | 40 | 29 | 28% | 46 | 80% | 29 min |
| Flash flood warnings | 14 | 7 | 50% | 16 | 75% | 112 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS State College, PA: tornado warnings | 40 | 7 | 83% | 23 | 35% | 22 min |
| NWS State College, PA: severe thunderstorm warnings | 243 | 127 | 48% | 332 | 83% | 28 min |
| NWS State College, PA: flash flood warnings | 79 | 46 | 42% | 114 | 76% | 101 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 7, 2:33 PM EST | Winter Weather Advisory | CTP | 37 hr |
| Jan 8, 7:22 AM EST | Special Weather Statement | CTP | 53 min |
| Jan 10, 3:14 PM EST | Winter Weather Advisory | CTP | 3 days |
| Jan 17, 6:03 AM EST | Winter Weather Advisory | CTP | 33 hr |
| Jan 18, 12:29 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 18, 8:34 PM EST | Winter Weather Advisory | CTP | 11 hr |
| Jan 20, 4:13 AM EST | Winter Weather Advisory | CTP | 40 hr |
| Jan 25, 2:24 PM EST | Winter Storm Watch | CTP | 13 hr |
| Jan 26, 2:59 AM EST | Winter Storm Warning | CTP | 21 hr |
| Jan 26, 2:19 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 26, 6:41 PM EST | Special Weather Statement | CTP | 64 min |
| Jan 30, 7:18 PM EST | Winter Storm Watch | CTP | 20 hr |
| Jan 31, 3:07 PM EST | Winter Storm Warning | CTP | 40 hr |
| Feb 1, 8:39 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 4, 2:47 PM EST | Winter Weather Advisory | CTP | 32 hr |
| Feb 5, 6:26 PM EST | Special Weather Statement | CTP | 79 min |
| Feb 8, 4:24 AM EST | Wind Advisory | CTP | 15 hr |
| Feb 13, 3:14 PM EST | Wind Advisory | CTP | 30 hr |
| Feb 18, 11:00 AM EST | High Wind Watch | CTP | 10 hr |
| Feb 18, 9:18 PM EST | High Wind Warning | CTP | 24 hr |
| Feb 20, 4:29 AM EST | Winter Weather Advisory | CTP | 30 hr |
| Feb 21, 5:06 AM EST | Winter Storm Watch | CTP | 8 hr |
| Feb 21, 1:22 PM EST | Winter Storm Warning | CTP | 17 hr |
| Feb 21, 5:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 24, 3:00 AM EST | Flood Watch | CTP | 30 hr |
| Feb 24, 3:16 AM EST | High Wind Watch | CTP | 19 hr |
| Feb 24, 10:06 PM EST | High Wind Warning | CTP | 20 hr |
| Feb 27, 1:59 PM EST | Flood Watch | CTP | 22 hr |
| Feb 28, 8:52 AM EST | Special Weather Statement | CTP | 23 min |
| Mar 4, 3:33 AM EST | Flood Watch | CTP | 3 days |
| Mar 6, 2:50 PM EST | Areal Flood Advisory | CTP | 4 hr |
| Mar 6, 3:06 PM EST | Areal Flood Advisory | CTP | 4 hr |
| Mar 6, 6:16 PM EST | River Flood Warning | CTP | 10 hr |
| Mar 6, 8:00 PM EST | Areal Flood Advisory | CTP | 6 hr |
| Mar 8, 4:25 AM EST | Flood Watch | CTP | 66 hr |
| Mar 10, 4:45 AM EST | River Flood Warning | CTP | 61 hr |
| Mar 10, 4:45 AM EST | River Flood Warning | CTP | 24 hr |
| Mar 10, 10:09 AM EST | Areal Flood Advisory | CTP | 3 hr |
| Mar 10, 11:35 AM EST | River Flood Warning | CTP | 3 days |
| Mar 10, 11:35 AM EST | River Flood Warning | CTP | 4 days |
| Mar 10, 1:09 PM EST | Areal Flood Advisory | CTP | 6 hr |
| Mar 10, 4:31 PM EST | Areal Flood Warning | CTP | 10 hr |
| Mar 10, 7:55 PM EST | Special Weather Statement | CTP | 65 min |
| Mar 11, 2:26 AM EST | Areal Flood Warning | CTP | 8 hr |
| Apr 4, 10:22 PM EDT | Special Weather Statement | CTP | 38 min |
| Apr 5, 5:27 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 11, 6:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Apr 11, 7:46 PM EDT | Special Weather Statement | CTP | 59 min |
| Apr 15, 12:54 PM EDT | Flash Flood Watch | CTP | 33 hr |
| Apr 15, 1:56 PM EDT | Wind Advisory | CTP | 32 hr |
| Apr 16, 2:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 16, 4:01 PM EDT | Severe Thunderstorm Warning | CTP | 59 min |
| Apr 16, 4:29 PM EDT | Mesoscale Discussion | SPC | 31 min |
| Apr 16, 4:39 PM EDT | Areal Flood Warning | CTP | 20 hr |
| Apr 16, 4:41 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 16, 5:38 PM EDT | Flash Flood Warning | CTP | 7 hr |
| Apr 16, 6:27 PM EDT | River Flood Warning | CTP | 44 hr |
| Apr 16, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 16, 6:46 PM EDT | Special Weather Statement | CTP | 29 min |
| Apr 16, 7:47 PM EDT | Severe Thunderstorm Warning | CTP | 43 min |
| Apr 16, 8:05 PM EDT | Tornado Warning | CTP | 25 min |
| Apr 16, 8:25 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| Apr 16, 8:29 PM EDT | Tornado Warning | CTP | 31 min |
| Apr 16, 9:40 PM EDT | Wind Advisory | CTP | 22 hr |
| Apr 17, 12:28 PM EDT | River Flood Warning | CTP | 19 hr |
| Apr 17, 11:29 PM EDT | Special Weather Statement | CTP | 3 hr |
| Apr 20, 3:45 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Apr 20, 4:03 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 21, 2:59 PM EDT | Frost Advisory | CTP | 17 hr |
| Apr 24, 2:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 24, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 24, 5:17 PM EDT | Special Weather Statement | CTP | 28 min |
| Apr 24, 5:46 PM EDT | Special Weather Statement | CTP | 29 min |
| Apr 24, 6:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Apr 24, 6:20 PM EDT | Special Weather Statement | CTP | 25 min |
| Apr 27, 11:16 AM EDT | Flash Flood Watch | CTP | 23 hr |
| Apr 27, 3:10 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 27, 6:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 27, 9:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 27, 9:14 PM EDT | Special Weather Statement | CTP | 31 min |
| Apr 27, 11:50 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 28, 2:20 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 28, 3:32 AM EDT | Mesoscale Discussion | SPC | 28 min |
| Apr 28, 3:39 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Apr 28, 3:46 AM EDT | Severe Thunderstorm Warning | CTP | 44 min |
| Apr 28, 4:25 AM EDT | Flash Flood Warning | CTP | 7 hr |
| Apr 28, 4:28 AM EDT | Severe Thunderstorm Warning | CTP | 47 min |
| Apr 28, 5:14 AM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Apr 28, 5:35 AM EDT | Tornado Warning | CTP | 25 min |
| Apr 28, 7:54 AM EDT | Special Weather Statement | CTP | 36 min |
| Apr 28, 7:59 AM EDT | Special Weather Statement | CTP | 46 min |
| Apr 28, 8:07 AM EDT | River Flood Warning | CTP | 24 hr |
| Apr 28, 8:17 AM EDT | Severe Thunderstorm Warning | CTP | 58 min |
| Apr 28, 8:21 AM EDT | Tornado Warning | CTP | 24 min |
| Apr 28, 8:44 AM EDT | Tornado Warning | CTP | 14 min |
| Apr 28, 8:54 AM EDT | Severe Thunderstorm Warning | CTP | 66 min |
| Apr 28, 9:30 AM EDT | Tornado Warning | CTP | 15 min |
| Apr 28, 9:58 AM EDT | Tornado Warning | CTP | 21 min |
| Apr 28, 10:03 AM EDT | Severe Thunderstorm Warning | CTP | 27 min |
| Apr 28, 10:13 AM EDT | Tornado Warning | CTP | 32 min |
| Apr 28, 10:26 AM EDT | River Flood Warning | CTP | 48 hr |
| Apr 28, 10:26 AM EDT | River Flood Warning | CTP | 63 hr |
| May 3, 2:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 3, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 6:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 6, 7:15 PM EDT | Special Weather Statement | CTP | 60 min |
| May 16, 9:00 PM EDT | Special Weather Statement | CTP | 60 min |
| May 17, 11:13 AM EDT | Flood Watch | CTP | 33 hr |
| May 17, 6:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 18, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 18, 2:51 PM EDT | Special Weather Statement | CTP | 54 min |
| May 18, 3:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 18, 3:11 PM EDT | Severe Thunderstorm Warning | CTP | 49 min |
| May 18, 4:20 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 18, 4:31 PM EDT | Flash Flood Warning | CTP | 4 hr |
| May 19, 2:29 AM EDT | Areal Flood Advisory | CTP | 2 hr |
| May 19, 11:41 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 19, 12:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 19, 2:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 19, 4:22 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 19, 4:46 PM EDT | Special Weather Statement | CTP | 59 min |
| May 19, 5:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 23, 10:48 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 23, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 23, 5:34 PM EDT | Special Weather Statement | CTP | 26 min |
| May 23, 6:27 PM EDT | Severe Thunderstorm Warning | CTP | 34 min |
| May 26, 2:53 PM EDT | Tornado Watch | SPC | 7 hr |
| May 26, 5:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 26, 6:40 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| May 26, 6:48 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| May 26, 7:34 PM EDT | Severe Thunderstorm Warning | CTP | 56 min |
| May 26, 8:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 27, 12:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| May 27, 12:57 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 27, 6:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 27, 6:26 PM EDT | Special Weather Statement | CTP | 49 min |
| May 27, 6:49 PM EDT | Severe Thunderstorm Warning | CTP | 71 min |
| May 27, 7:29 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| May 27, 8:47 PM EDT | Severe Thunderstorm Warning | CTP | 58 min |
| May 27, 9:20 PM EDT | Severe Thunderstorm Warning | CTP | 40 min |
| Jun 1, 10:02 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 2:58 PM EDT | Special Weather Statement | CTP | 32 min |
| Jun 1, 3:30 PM EDT | Special Weather Statement | CTP | 45 min |
| Jun 1, 3:41 PM EDT | Severe Thunderstorm Warning | CTP | 34 min |
| Jun 1, 4:16 PM EDT | Special Weather Statement | CTP | 29 min |
| Jun 8, 10:21 AM EDT | Heat Advisory | CTP | 10 hr |
| Jun 9, 12:47 AM EDT | Heat Advisory | CTP | 18 hr |
| Jun 9, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 1:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 9, 5:06 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jun 9, 5:40 PM EDT | Severe Thunderstorm Warning | CTP | 65 min |
| Jun 9, 5:53 PM EDT | Severe Thunderstorm Warning | CTP | 112 min |
| Jun 9, 6:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 10, 5:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 10:46 AM EDT | Flash Flood Watch | CTP | 13 hr |
| Jun 11, 7:42 PM EDT | Severe Thunderstorm Warning | CTP | 63 min |
| Jun 11, 7:52 PM EDT | Severe Thunderstorm Warning | CTP | 68 min |
| Jun 11, 7:56 PM EDT | Tornado Warning | CTP | 49 min |
| Jun 11, 8:04 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jun 11, 8:22 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Jun 11, 8:41 PM EDT | Severe Thunderstorm Warning | CTP | 79 min |
| Jun 12, 12:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 12, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 12, 2:06 PM EDT | Severe Thunderstorm Warning | CTP | 54 min |
| Jun 12, 2:49 PM EDT | Tornado Warning | CTP | 26 min |
| Jun 12, 2:50 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jun 12, 2:56 PM EDT | Severe Thunderstorm Warning | CTP | 79 min |
| Jun 12, 3:16 PM EDT | Tornado Warning | CTP | 44 min |
| Jun 12, 3:47 PM EDT | Tornado Warning | CTP | 13 min |
| Jun 16, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 21, 3:31 AM EDT | Areal Flood Advisory | CTP | 89 min |
| Jun 22, 2:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 24, 3:26 AM EDT | Special Weather Statement | CTP | 64 min |
| Jun 24, 11:42 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 3, 2:22 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 3, 3:46 AM EDT | Special Weather Statement | CTP | 59 min |
| Jul 6, 2:42 PM EDT | Special Weather Statement | CTP | 33 min |
| Jul 7, 3:07 PM EDT | Severe Thunderstorm Warning | CTP | 53 min |
| Jul 7, 3:50 PM EDT | Special Weather Statement | CTP | 25 min |
| Jul 7, 4:02 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 8, 11:31 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 8, 11:40 AM EDT | Flash Flood Watch | CTP | 7 hr |
| Jul 8, 11:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 8, 1:51 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 2:00 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Jul 8, 5:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 11, 7:41 PM EDT | Special Weather Statement | CTP | 34 min |
| Jul 11, 7:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 11, 8:17 PM EDT | Special Weather Statement | CTP | 28 min |
| Jul 18, 6:21 PM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| Jul 19, 3:35 PM EDT | Excessive Heat Watch | CTP | 22 hr |
| Jul 20, 3:59 AM EDT | Excessive Heat Watch | CTP | 10 hr |
| Jul 20, 1:43 PM EDT | Excessive Heat Warning | CTP | 30 hr |
| Jul 20, 1:43 PM EDT | Excessive Heat Warning | CTP | 54 hr |
| Jul 22, 4:08 AM EDT | Heat Advisory | CTP | 40 hr |
| Jul 22, 3:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 22, 3:38 PM EDT | Special Weather Statement | CTP | 37 min |
| Jul 22, 4:02 PM EDT | Severe Thunderstorm Warning | CTP | 58 min |
| Jul 22, 4:34 PM EDT | Severe Thunderstorm Warning | CTP | 36 min |
| Jul 23, 6:00 PM EDT | Special Weather Statement | CTP | 60 min |
| Jul 23, 6:30 PM EDT | Severe Thunderstorm Warning | CTP | 46 min |
| Jul 23, 7:56 PM EDT | Special Weather Statement | CTP | 64 min |
| Jul 25, 12:06 PM EDT | Special Weather Statement | CTP | 54 min |
| Jul 25, 12:39 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Jul 25, 1:04 PM EDT | Special Weather Statement | CTP | 56 min |
| Jul 25, 1:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 25, 5:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 28, 1:23 PM EDT | Heat Advisory | CTP | 31 hr |
| Jul 29, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 29, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 1, 2:46 PM EDT | Severe Thunderstorm Warning | CTP | 29 min |
| Aug 1, 3:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 1, 3:28 PM EDT | Special Weather Statement | CTP | 32 min |
| Aug 1, 6:20 PM EDT | Severe Thunderstorm Warning | CTP | 55 min |
| Aug 9, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Aug 9, 3:54 PM EDT | Special Weather Statement | CTP | 66 min |
| Aug 9, 4:16 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 13, 2:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 13, 3:25 PM EDT | Special Weather Statement | CTP | 35 min |
| Aug 13, 3:58 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 15, 10:05 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Aug 18, 7:18 PM EDT | Special Weather Statement | CTP | 57 min |
| Aug 19, 12:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 19, 1:04 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 19, 3:52 PM EDT | Special Weather Statement | CTP | 68 min |
| Aug 19, 4:14 PM EDT | Severe Thunderstorm Warning | CTP | 61 min |
| Aug 19, 4:48 PM EDT | Severe Thunderstorm Warning | CTP | 72 min |
| Aug 20, 4:15 AM EDT | Dense Fog Advisory | CTP | 7 hr |
| Aug 21, 11:54 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 12:52 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 21, 3:13 PM EDT | Special Weather Statement | CTP | 62 min |
| Aug 21, 3:28 PM EDT | Severe Thunderstorm Warning | CTP | 62 min |
| Aug 21, 7:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 25, 7:51 AM EDT | Special Weather Statement | CTP | 54 min |
| Aug 26, 5:34 AM EDT | Flash Flood Watch | CTP | 54 hr |
| Aug 27, 4:15 AM EDT | Wind Advisory | CTP | 37 hr |
| Aug 27, 11:23 AM EDT | River Flood Warning | CTP | 37 hr |
| Aug 28, 2:37 AM EDT | Areal Flood Warning | CTP | 8 hr |
| Aug 28, 10:38 AM EDT | Areal Flood Warning | CTP | 4 hr |
| Sep 3, 8:17 AM EDT | Special Weather Statement | CTP | 28 min |
| Sep 3, 8:44 AM EDT | Special Weather Statement | CTP | 61 min |
| Sep 3, 8:48 AM EDT | Severe Thunderstorm Warning | CTP | 42 min |
| Sep 3, 9:37 AM EDT | Special Weather Statement | CTP | 23 min |
| Sep 3, 10:07 AM EDT | Special Weather Statement | CTP | 23 min |
| Sep 4, 9:11 PM EDT | Special Weather Statement | CTP | 64 min |
| Sep 4, 9:51 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 4, 10:14 PM EDT | Special Weather Statement | CTP | 61 min |
| Sep 4, 10:54 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 4, 11:29 PM EDT | Flash Flood Watch | CTP | 21 hr |
| Sep 4, 11:35 PM EDT | Special Weather Statement | CTP | 70 min |
| Sep 4, 11:44 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Sep 5, 12:38 AM EDT | Special Weather Statement | CTP | 67 min |
| Sep 5, 9:07 PM EDT | Flood Watch | CTP | 71 hr |
| Sep 5, 11:42 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 6, 12:00 PM EDT | River Flood Warning | CTP | 67 hr |
| Sep 7, 8:32 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 7, 9:33 AM EDT | Flash Flood Warning | CTP | 10 hr |
| Sep 7, 11:22 AM EDT | River Flood Warning | CTP | 4 days |
| Sep 7, 11:22 AM EDT | River Flood Warning | CTP | 4 days |
| Sep 7, 12:09 PM EDT | Areal Flood Warning | CTP | 12 hr |
| Sep 7, 3:28 PM EDT | River Flood Warning | CTP | 44 hr |
| Sep 7, 7:00 PM EDT | Flash Flood Warning | CTP | 6 hr |
| Sep 8, 12:59 AM EDT | Areal Flood Warning | CTP | 8 hr |
| Sep 8, 9:22 AM EDT | Areal Flood Warning | CTP | 24 hr |
| Sep 8, 7:59 PM EDT | Flash Flood Watch | CTP | 8 hr |
| Sep 9, 9:18 AM EDT | Areal Flood Warning | CTP | 8 hr |
| Sep 10, 4:40 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 11, 5:29 PM EDT | Special Weather Statement | CTP | 31 min |
| Sep 11, 5:53 PM EDT | Severe Thunderstorm Warning | CTP | 67 min |
| Sep 11, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 11, 6:50 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 11, 7:12 PM EDT | Special Weather Statement | CTP | 48 min |
| Sep 11, 7:51 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Sep 12, 12:29 AM EDT | Dense Fog Advisory | CTP | 10 hr |
| Sep 14, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 14, 6:23 PM EDT | Severe Thunderstorm Warning | CTP | 67 min |
| Sep 14, 7:45 PM EDT | Special Weather Statement | CTP | 45 min |
| Sep 23, 1:15 AM EDT | Dense Fog Advisory | CTP | 9 hr |
| Sep 23, 9:53 AM EDT | Flash Flood Watch | CTP | 16 hr |
| Sep 23, 11:39 AM EDT | Areal Flood Advisory | CTP | 6 hr |
| Sep 23, 4:04 PM EDT | Flash Flood Warning | CTP | 5 hr |
| Sep 23, 6:48 PM EDT | River Flood Warning | CTP | 7 hr |
| Sep 27, 7:32 AM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 27, 8:35 AM EDT | Flash Flood Warning | CTP | 115 min |
| Sep 27, 9:12 AM EDT | Flash Flood Watch | CTP | 40 hr |
| Sep 27, 2:53 PM EDT | Flash Flood Warning | CTP | 2 hr |
| Sep 27, 3:31 PM EDT | Areal Flood Warning | CTP | 6 hr |
| Sep 27, 3:43 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Sep 28, 12:47 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 28, 2:06 PM EDT | Areal Flood Advisory | CTP | 3 hr |
| Sep 28, 4:12 PM EDT | Flash Flood Warning | CTP | 3 hr |
| Sep 28, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Sep 28, 7:14 PM EDT | River Flood Warning | CTP | 9 hr |
| Sep 28, 9:26 PM EDT | Areal Flood Warning | CTP | 6 hr |
| Sep 29, 10:20 AM EDT | River Flood Warning | CTP | 10 hr |
| Sep 29, 11:07 AM EDT | Special Weather Statement | CTP | 53 min |
| Oct 6, 1:09 PM EDT | Frost Advisory | CTP | 19 hr |
| Oct 13, 7:58 PM EDT | Special Weather Statement | CTP | 47 min |
| Oct 22, 5:22 AM EDT | Frost Advisory | CTP | 28 hr |
| Oct 26, 3:41 PM EDT | Freeze Watch | CTP | 11 hr |
| Oct 27, 3:04 AM EDT | Freeze Warning | CTP | 31 hr |
| Oct 28, 2:12 AM EDT | Winter Storm Watch | CTP | 11 hr |
| Oct 28, 1:08 PM EDT | Winter Storm Warning | CTP | 33 hr |
| Oct 29, 12:34 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Oct 29, 7:36 AM EDT | Mesoscale Discussion | SPC | 5 hr |
| Oct 31, 5:26 AM EDT | Dense Fog Advisory | CTP | 4 hr |
| Nov 23, 12:02 AM EST | River Flood Warning | CTP | 33 hr |
| Nov 23, 12:04 AM EST | Areal Flood Advisory | CTP | 6 hr |
| Nov 23, 6:03 AM EST | Areal Flood Advisory | CTP | 117 min |
| Dec 7, 4:18 AM EST | Flood Watch | CTP | 20 hr |
| Dec 7, 4:51 AM EST | Winter Weather Advisory | CTP | 20 hr |
| Dec 7, 6:21 PM EST | Mesoscale Discussion | SPC | 4 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 archive20102012
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.