Alert archive / Maryland / Washington County
Weather alerts in Washington County, Maryland, 2011
256 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Washington County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 256
- Warnings
- 96
- Watches
- 43
- Advisories
- 27
- Busiest month
- April55 alerts
- Busiest day
- April 16, 201114 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 5 tornado warnings covering Washington County in 2011 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.
Washington County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 0 | 100% | 2 | 0% | |
| Severe thunderstorm warnings | 55 | 46 | 16% | 30 | 80% | 14 min |
| Flash flood warnings | 9 | 5 | 44% | 3 | 100% | 186 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 96 | 27 | 72% | 45 | 67% | 11 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 440 | 335 | 24% | 963 | 78% | 18 min |
| NWS Baltimore/Washington: flash flood warnings | 170 | 99 | 42% | 341 | 84% | 121 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, 6:50 PM EST | Winter Weather Advisory | LWX | 35 hr |
| Jan 10, 9:39 PM EST | Winter Weather Advisory | LWX | 55 hr |
| Jan 17, 2:44 PM EST | Winter Weather Advisory | LWX | 20 hr |
| Jan 18, 11:32 PM EST | Freezing Rain Advisory | LWX | 6 hr |
| Jan 20, 8:54 AM EST | Winter Weather Advisory | LWX | 24 hr |
| Jan 25, 10:16 AM EST | Winter Storm Watch | LWX | 18 hr |
| Jan 25, 6:02 PM EST | Winter Storm Warning | LWX | 29 hr |
| Jan 26, 7:30 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 31, 4:07 AM EST | Winter Storm Watch | LWX | 32 hr |
| Jan 31, 2:40 PM EST | Winter Weather Advisory | LWX | 21 hr |
| Feb 1, 11:57 AM EST | Freezing Rain Advisory | LWX | 19 hr |
| Feb 1, 8:39 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 4, 2:44 PM EST | Freezing Rain Advisory | LWX | 22 hr |
| Feb 8, 3:26 AM EST | Wind Advisory | LWX | 13 hr |
| Feb 14, 2:45 AM EST | Wind Advisory | LWX | 22 hr |
| Feb 18, 3:16 AM EST | Fire Weather Watch | LWX | 11 hr |
| Feb 18, 10:30 AM EST | High Wind Watch | LWX | 7 hr |
| Feb 18, 2:03 PM EST | Red Flag Warning | LWX | 31 hr |
| Feb 18, 5:22 PM EST | High Wind Warning | LWX | 26 hr |
| Feb 18, 5:22 PM EST | Wind Advisory | LWX | 19 hr |
| Feb 19, 6:33 PM EST | Wind Advisory | LWX | 5 hr |
| Feb 21, 3:51 AM EST | Winter Storm Watch | LWX | 8 hr |
| Feb 21, 11:57 AM EST | Winter Storm Warning | LWX | 18 hr |
| Feb 21, 5:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 21, 6:33 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 24, 4:05 AM EST | High Wind Watch | LWX | 10 hr |
| Feb 24, 1:41 PM EST | Wind Advisory | LWX | 24 hr |
| Feb 24, 8:36 PM EST | High Wind Warning | LWX | 22 hr |
| Feb 28, 8:36 AM EST | Mesoscale Discussion | SPC | 24 min |
| Feb 28, 8:57 AM EST | Tornado Watch | SPC | 9 hr |
| Feb 28, 9:31 AM EST | Special Weather Statement | LWX | 29 min |
| Feb 28, 9:40 AM EST | Severe Thunderstorm Warning | LWX | 50 min |
| Mar 5, 3:16 AM EST | Flood Watch | LWX | 43 hr |
| Mar 6, 2:37 PM EST | Winter Weather Advisory | LWX | 12 hr |
| Mar 6, 10:10 PM EST | River Flood Warning | LWX | 13 hr |
| Mar 8, 3:14 AM EST | Flood Watch | LWX | 65 hr |
| Mar 9, 2:43 PM EST | River Flood Warning | LWX | 54 hr |
| Mar 9, 3:32 PM EST | River Flood Warning | LWX | 3 days |
| Mar 10, 5:34 PM EST | Severe Thunderstorm Warning | LWX | 41 min |
| Mar 10, 6:06 PM EST | Special Weather Statement | LWX | 24 min |
| Mar 10, 6:07 PM EST | Flash Flood Warning | LWX | 3 hr |
| Mar 10, 6:38 PM EST | Areal Flood Warning | LWX | 3 hr |
| Mar 23, 3:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Mar 23, 4:13 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 23, 7:03 PM EDT | Special Weather Statement | LWX | 42 min |
| Apr 3, 7:52 PM EDT | Special Weather Statement | LWX | 23 min |
| Apr 3, 8:18 PM EDT | Special Weather Statement | LWX | 27 min |
| Apr 3, 8:52 PM EDT | Special Weather Statement | LWX | 23 min |
| Apr 3, 9:19 PM EDT | Special Weather Statement | LWX | 26 min |
| Apr 3, 10:06 PM EDT | Special Weather Statement | LWX | 39 min |
| Apr 11, 7:12 PM EDT | Special Weather Statement | LWX | 33 min |
| Apr 15, 4:34 AM EDT | Flash Flood Watch | LWX | 41 hr |
| Apr 15, 11:54 AM EDT | Wind Advisory | LWX | 29 hr |
| Apr 16, 12:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 16, 1:29 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 16, 2:58 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Apr 16, 3:18 PM EDT | Special Weather Statement | LWX | 57 min |
| Apr 16, 3:19 PM EDT | Special Weather Statement | LWX | 56 min |
| Apr 16, 3:29 PM EDT | Areal Flood Warning | LWX | 7 hr |
| Apr 16, 4:19 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Apr 16, 4:29 PM EDT | Mesoscale Discussion | SPC | 31 min |
| Apr 16, 4:53 PM EDT | Areal Flood Warning | LWX | 5 hr |
| Apr 16, 5:02 PM EDT | Special Weather Statement | LWX | 28 min |
| Apr 16, 6:35 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Apr 16, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 16, 7:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Apr 16, 7:44 PM EDT | River Flood Warning | LWX | 26 hr |
| Apr 16, 9:20 PM EDT | Wind Advisory | LWX | 22 hr |
| Apr 16, 10:03 PM EDT | River Flood Warning | LWX | 37 hr |
| Apr 16, 10:14 PM EDT | River Flood Warning | LWX | 42 hr |
| Apr 16, 11:27 PM EDT | Areal Flood Warning | LWX | 17 hr |
| Apr 17, 4:02 AM EDT | Special Weather Statement | LWX | 58 min |
| Apr 19, 9:54 AM EDT | Flood Watch | LWX | 8 hr |
| Apr 21, 2:05 PM EDT | Flood Watch | LWX | 44 hr |
| Apr 23, 4:06 AM EDT | Flash Flood Watch | LWX | 18 hr |
| Apr 23, 9:05 PM EDT | Special Weather Statement | LWX | 40 min |
| Apr 24, 2:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 26, 1:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Apr 26, 2:09 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 26, 4:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 26, 7:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 27, 9:51 AM EDT | Flash Flood Watch | LWX | 29 hr |
| Apr 27, 1:23 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 27, 4:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 27, 6:15 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 6:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 27, 8:19 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Apr 27, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | 19 min |
| Apr 28, 12:27 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 28, 12:41 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 28, 1:29 AM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Apr 28, 1:33 AM EDT | Flash Flood Warning | LWX | 4 hr |
| Apr 28, 2:59 AM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Apr 28, 3:04 AM EDT | Flash Flood Warning | LWX | 7 hr |
| Apr 28, 4:24 AM EDT | Tornado Warning | LWX | 51 min |
| Apr 28, 8:01 AM EDT | Flash Flood Warning | LWX | 119 min |
| Apr 28, 9:58 AM EDT | Areal Flood Warning | LWX | 3 hr |
| Apr 28, 10:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 28, 12:28 PM EDT | River Flood Warning | LWX | 11 hr |
| Apr 28, 9:43 PM EDT | River Flood Warning | LWX | 10 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 17, 3:45 AM EDT | Flash Flood Watch | LWX | 44 hr |
| May 17, 5:18 PM EDT | Special Weather Statement | LWX | 27 min |
| May 17, 5:45 PM EDT | Flash Flood Warning | LWX | 3 hr |
| May 17, 6:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 17, 8:17 PM EDT | Tornado Warning | LWX | 11 min |
| May 18, 6:31 AM EDT | River Flood Warning | LWX | 45 hr |
| May 18, 9:47 AM EDT | River Flood Warning | LWX | 28 hr |
| May 18, 11:23 AM EDT | Tornado Warning | LWX | 22 min |
| May 18, 11:55 AM EDT | Mesoscale Discussion | SPC | 65 min |
| May 18, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 18, 3:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 18, 3:12 PM EDT | Severe Thunderstorm Warning | LWX | 33 min |
| May 18, 3:44 PM EDT | Severe Thunderstorm Warning | LWX | 19 min |
| May 18, 5:01 PM EDT | Special Weather Statement | LWX | 29 min |
| May 18, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 19, 4:36 AM EDT | Flash Flood Watch | LWX | 14 hr |
| May 23, 10:33 AM EDT | Mesoscale Discussion | SPC | 87 min |
| May 23, 10:48 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 23, 2:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 23, 4:37 PM EDT | Special Weather Statement | LWX | 23 min |
| May 23, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 26, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| May 26, 4:29 PM EDT | Tornado Warning | LWX | 31 min |
| May 26, 4:51 PM EDT | Tornado Warning | LWX | 39 min |
| May 26, 5:24 PM EDT | Severe Thunderstorm Warning | LWX | 22 min |
| May 26, 5:27 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| May 26, 5:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| May 26, 6:26 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| May 26, 6:40 PM EDT | Special Weather Statement | LWX | 65 min |
| May 26, 6:46 PM EDT | Severe Thunderstorm Warning | LWX | 59 min |
| May 27, 1:00 AM EDT | Severe Thunderstorm Warning | LWX | 45 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, 7:29 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| May 27, 7:59 PM EDT | Special Weather Statement | LWX | 46 min |
| May 27, 8:08 PM EDT | Severe Thunderstorm Warning | LWX | 22 min |
| Jun 1, 2:24 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 3:02 PM EDT | Special Weather Statement | LWX | 28 min |
| Jun 1, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jun 8, 1:28 PM EDT | Heat Advisory | LWX | 31 hr |
| Jun 9, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 9, 6:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 9, 10:19 PM EDT | Special Weather Statement | LWX | 26 min |
| Jun 10, 3:00 PM EDT | Special Weather Statement | LWX | 30 min |
| Jun 10, 5:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 6:47 PM EDT | Special Weather Statement | LWX | 28 min |
| Jun 11, 7:17 PM EDT | Special Weather Statement | LWX | 28 min |
| Jun 12, 12:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 12, 1:46 PM EDT | Special Weather Statement | LWX | 29 min |
| Jun 12, 1:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 12, 2:10 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Jun 12, 2:56 PM EDT | Severe Thunderstorm Warning | LWX | 34 min |
| Jun 12, 3:16 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 16, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 16, 10:17 PM EDT | Special Weather Statement | LWX | 43 min |
| Jun 21, 6:12 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jun 22, 12:50 AM EDT | Special Weather Statement | LWX | 20 min |
| Jun 22, 2:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 3, 3:14 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jul 3, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 3, 3:56 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jul 3, 4:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 7:28 PM EDT | Special Weather Statement | LWX | 32 min |
| Jul 4, 8:10 PM EDT | Special Weather Statement | LWX | 35 min |
| Jul 7, 10:54 PM EDT | Special Weather Statement | LWX | 36 min |
| Jul 7, 11:28 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 8, 11:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 8, 3:24 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 9, 4:19 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Jul 11, 5:47 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 11, 6:40 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Jul 11, 7:05 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jul 11, 7:10 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Jul 11, 7:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 19, 12:12 PM EDT | Excessive Heat Watch | LWX | 27 hr |
| Jul 19, 5:23 PM EDT | Special Weather Statement | LWX | 22 min |
| Jul 19, 5:57 PM EDT | Special Weather Statement | LWX | 48 min |
| Jul 19, 6:00 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Jul 20, 3:19 PM EDT | Excessive Heat Warning | LWX | 31 hr |
| Jul 20, 3:19 PM EDT | Excessive Heat Warning | LWX | 54 hr |
| Jul 21, 3:38 PM EDT | Heat Advisory | LWX | 52 hr |
| Jul 22, 2:00 PM EDT | Special Weather Statement | LWX | 30 min |
| Jul 22, 2:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 22, 2:43 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Jul 22, 2:56 PM EDT | Flash Flood Warning | LWX | 106 min |
| Jul 22, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 22, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Jul 22, 3:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 22, 3:33 PM EDT | Special Weather Statement | LWX | 27 min |
| Jul 28, 12:53 PM EDT | Heat Advisory | LWX | 31 hr |
| Jul 29, 6:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 29, 6:34 PM EDT | Special Weather Statement | LWX | 26 min |
| Jul 29, 6:58 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Aug 1, 3:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 1, 5:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 1, 6:13 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Aug 13, 2:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 13, 2:13 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Aug 14, 3:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Aug 14, 7:44 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Aug 18, 8:23 PM EDT | Special Weather Statement | LWX | 37 min |
| Aug 18, 8:30 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Aug 18, 9:29 PM EDT | Special Weather Statement | LWX | 46 min |
| Aug 18, 9:39 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 18, 10:11 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Aug 18, 10:36 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Aug 19, 3:54 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Aug 19, 4:25 PM EDT | Special Weather Statement | CTP | 65 min |
| Aug 19, 4:53 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| 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, 1:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Aug 21, 7:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 25, 7:29 AM EDT | Special Weather Statement | LWX | 31 min |
| Sep 5, 4:06 AM EDT | Flash Flood Watch | LWX | 5 days |
| Sep 6, 12:26 PM EDT | River Flood Watch | LWX | 22 hr |
| Sep 6, 12:26 PM EDT | River Flood Watch | LWX | 19 hr |
| Sep 6, 12:26 PM EDT | River Flood Watch | LWX | 29 hr |
| Sep 6, 12:29 PM EDT | River Flood Watch | LWX | 5 hr |
| Sep 6, 5:13 PM EDT | River Flood Warning | LWX | 24 hr |
| Sep 6, 5:24 PM EDT | River Flood Watch | LWX | 24 hr |
| Sep 9, 8:27 PM EDT | River Flood Warning | LWX | 25 hr |
| Sep 11, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 11, 6:56 PM EDT | Special Weather Statement | LWX | 34 min |
| Sep 11, 7:41 PM EDT | Special Weather Statement | LWX | 49 min |
| Sep 14, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 14, 3:26 PM EDT | Special Weather Statement | LWX | 49 min |
| Sep 14, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Sep 14, 4:42 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Sep 14, 4:44 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Sep 14, 5:28 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Sep 14, 5:34 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Sep 14, 6:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Sep 14, 6:10 PM EDT | Flash Flood Warning | LWX | 68 min |
| Sep 14, 6:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Sep 14, 6:37 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Sep 23, 5:10 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Sep 23, 9:31 PM EDT | Dense Fog Advisory | LWX | 11 hr |
| Sep 27, 12:33 PM EDT | Special Weather Statement | LWX | 27 min |
| Sep 29, 5:04 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Oct 7, 2:47 PM EDT | Dense Fog Advisory | LWX | 15 hr |
| Oct 26, 4:24 PM EDT | Freeze Watch | LWX | 23 hr |
| Oct 27, 3:08 PM EDT | Frost Advisory | LWX | 17 hr |
| Oct 28, 3:36 AM EDT | Winter Storm Watch | LWX | 15 hr |
| Oct 28, 2:31 PM EDT | Winter Storm Warning | LWX | 27 hr |
| Oct 29, 12:34 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Oct 29, 7:36 AM EDT | Mesoscale Discussion | SPC | 5 hr |
| Oct 29, 10:32 AM EDT | Freeze Warning | LWX | 22 hr |
| Nov 23, 2:44 AM EST | River Flood Warning | LWX | 19 hr |
| Nov 23, 3:12 AM EST | Wind Advisory | LWX | 16 hr |
| Dec 6, 8:24 PM EST | Flood Watch | LWX | 29 hr |
| Dec 7, 4:30 AM EST | Winter Weather Advisory | LWX | 20 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.