Alert archive / Virginia / Loudoun County
Weather alerts in Loudoun County, Virginia, 2011
224 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Loudoun County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 224
- Warnings
- 97
- Watches
- 25
- Advisories
- 0
- Busiest month
- April54 alerts
- Busiest day
- April 28, 201118 alerts
Over time
By month
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 26, 7:30 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 26, 2:19 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 21, 6:33 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 28, 8:36 AM EST | Mesoscale Discussion | SPC | 24 min |
| Feb 28, 8:57 AM EST | Tornado Watch | SPC | 9 hr |
| Mar 6, 3:34 PM EST | Areal Flood Warning | LWX | 6 hr |
| Mar 9, 2:43 PM EST | River Flood Warning | LWX | 54 hr |
| Mar 9, 2:43 PM EST | River Flood Warning | LWX | 3 days |
| Mar 9, 9:26 PM EST | River Flood Warning | LWX | 30 hr |
| Mar 10, 1:25 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 10, 5:34 PM EST | Severe Thunderstorm Warning | LWX | 41 min |
| Mar 10, 5:48 PM EST | Flash Flood Warning | LWX | 4 hr |
| Mar 10, 6:07 PM EST | Flash Flood Warning | LWX | 3 hr |
| Mar 10, 6:10 PM EST | Severe Thunderstorm Warning | LWX | 65 min |
| Mar 10, 6:20 PM EST | Special Weather Statement | LWX | 25 min |
| Mar 10, 6:58 PM EST | Tornado Warning | LWX | 32 min |
| Mar 23, 4:13 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 23, 7:34 PM EDT | Special Weather Statement | LWX | 56 min |
| Mar 23, 8:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 2, 1:57 PM EDT | Special Weather Statement | LWX | 33 min |
| Apr 2, 2:14 PM EDT | Special Weather Statement | LWX | 31 min |
| Apr 5, 2:18 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 5, 3:04 AM EDT | Severe Thunderstorm Warning | LWX | 56 min |
| Apr 5, 3:25 AM EDT | Special Weather Statement | LWX | 65 min |
| Apr 16, 12:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 16, 1:29 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 16, 3:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Apr 16, 4:13 PM EDT | Special Weather Statement | LWX | 92 min |
| Apr 16, 4:21 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Apr 16, 4:29 PM EDT | Mesoscale Discussion | SPC | 31 min |
| Apr 16, 4:59 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Apr 16, 6:18 PM EDT | River Flood Warning | LWX | 59 hr |
| 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, 6:57 PM EDT | Areal Flood Warning | LWX | 11 hr |
| Apr 16, 7:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Apr 16, 7:14 PM EDT | Tornado Warning | LWX | 31 min |
| Apr 16, 7:38 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Apr 16, 8:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 16, 10:14 PM EDT | River Flood Warning | LWX | 42 hr |
| Apr 17, 3:40 AM EDT | River Flood Warning | LWX | 16 hr |
| Apr 17, 4:02 AM EDT | Special Weather Statement | LWX | 58 min |
| Apr 24, 2:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Apr 24, 3:14 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Apr 24, 3:36 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Apr 24, 3:40 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 24, 4:03 PM EDT | Tornado Warning | LWX | 27 min |
| Apr 24, 4:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Apr 24, 6:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Apr 24, 9:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Apr 27, 1:23 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 27, 4:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 27, 6:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Apr 27, 6:15 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 27, 7:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Apr 27, 8:02 PM EDT | Special Weather Statement | LWX | 28 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 27, 10:12 PM EDT | Mesoscale Discussion | SPC | 63 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, 2:59 AM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Apr 28, 5:09 AM EDT | Special Weather Statement | LWX | 51 min |
| Apr 28, 5:35 AM EDT | Tornado Warning | LWX | 26 min |
| Apr 28, 6:37 AM EDT | Tornado Warning | LWX | 38 min |
| Apr 28, 7:27 AM EDT | Flash Flood Warning | LWX | 5 hr |
| Apr 28, 7:38 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 28, 8:01 AM EDT | Flash Flood Warning | LWX | 119 min |
| Apr 28, 8:45 AM EDT | Areal Flood Warning | LWX | 6 hr |
| Apr 28, 9:39 AM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Apr 28, 9:45 AM EDT | Flash Flood Warning | LWX | 101 min |
| Apr 28, 9:58 AM EDT | Areal Flood Warning | LWX | 3 hr |
| Apr 28, 10:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| May 4, 5:35 PM EDT | Special Weather Statement | LWX | 25 min |
| May 6, 5:51 PM EDT | Special Weather Statement | LWX | 24 min |
| May 16, 7:24 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| May 16, 7:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| May 17, 6:27 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 18, 6:31 AM EDT | River Flood Warning | LWX | 45 hr |
| May 18, 6:31 AM EDT | River Flood Warning | LWX | 62 hr |
| 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, 2:08 PM EDT | Flash Flood Warning | LWX | 4 hr |
| May 18, 3:06 PM EDT | Special Weather Statement | LWX | 24 min |
| 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, 3:40 PM EDT | Flash Flood Warning | LWX | 2 hr |
| May 18, 3:44 PM EDT | Severe Thunderstorm Warning | LWX | 19 min |
| May 18, 3:50 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| May 18, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 23, 1:23 AM EDT | Special Weather Statement | LWX | 37 min |
| 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, 4:24 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| May 23, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 23, 5:12 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| May 24, 2:49 PM EDT | Special Weather Statement | LWX | 26 min |
| May 24, 3:03 PM EDT | Special Weather Statement | LWX | 27 min |
| May 24, 3:26 PM EDT | Special Weather Statement | LWX | 34 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, 7:06 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 27, 7:21 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 27, 7:29 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jun 1, 1:37 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 1, 2:24 PM EDT | Severe Thunderstorm Watch | SPC | 7 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, 4:06 PM EDT | Special Weather Statement | LWX | 24 min |
| Jun 9, 4:15 PM EDT | Special Weather Statement | LWX | 30 min |
| Jun 9, 5:33 PM EDT | Special Weather Statement | LWX | 27 min |
| Jun 9, 5:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Jun 9, 6:03 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jun 9, 6:11 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jun 9, 6:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 9, 6:44 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jun 9, 7:29 PM EDT | Special Weather Statement | LWX | 31 min |
| Jun 9, 7:57 PM EDT | Special Weather Statement | LWX | 33 min |
| Jun 10, 5:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 11, 12:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 11, 2:39 PM EDT | Severe Thunderstorm Warning | LWX | 39 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, 3:16 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 12, 3:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jun 12, 4:03 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jun 12, 4:05 PM EDT | Special Weather Statement | LWX | 25 min |
| Jun 16, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 22, 2:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 24, 1:05 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 6:34 PM EDT | Special Weather Statement | LWX | 26 min |
| Jun 28, 6:50 PM EDT | Special Weather Statement | LWX | 30 min |
| Jul 3, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 3, 4:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 5:23 PM EDT | Special Weather Statement | LWX | 37 min |
| Jul 3, 5:27 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jul 3, 5:58 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Jul 3, 6:15 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Jul 3, 6:28 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Jul 3, 6:44 PM EDT | Severe Thunderstorm Warning | LWX | 37 min |
| 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, 3:18 PM EDT | Special Weather Statement | LWX | 42 min |
| Jul 8, 5:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| 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, 7:10 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Jul 11, 7:42 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jul 11, 7:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 11, 8:06 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jul 11, 8:34 PM EDT | Severe Thunderstorm Warning | LWX | 26 min |
| Jul 13, 1:38 PM EDT | Special Weather Statement | LWX | 37 min |
| Jul 13, 1:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 13, 2:21 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 13, 2:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Jul 13, 2:53 PM EDT | Special Weather Statement | LWX | 37 min |
| Jul 13, 3:07 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 13, 3:24 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Jul 19, 6:00 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Jul 19, 7:31 PM EDT | Special Weather Statement | LWX | 44 min |
| Jul 22, 3:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 22, 4:08 PM EDT | Special Weather Statement | LWX | 37 min |
| Aug 1, 3:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 1, 4:01 PM EDT | Special Weather Statement | LWX | 29 min |
| Aug 1, 4:50 PM EDT | Special Weather Statement | LWX | 40 min |
| Aug 1, 4:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 1, 5:57 PM EDT | Flash Flood Warning | LWX | 119 min |
| Aug 1, 6:13 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Aug 1, 6:16 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Aug 1, 7:02 PM EDT | Special Weather Statement | LWX | 28 min |
| Aug 3, 6:01 AM EDT | Severe Thunderstorm Warning | LWX | 31 min |
| Aug 7, 12:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 13, 2:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 13, 3:17 PM EDT | Severe Thunderstorm Warning | LWX | 30 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 14, 9:15 PM EDT | Severe Thunderstorm Warning | LWX | 22 min |
| Aug 18, 5:34 PM EDT | Special Weather Statement | LWX | 26 min |
| Aug 18, 5:55 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Aug 18, 7:17 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Aug 18, 8:00 PM EDT | Severe Thunderstorm Warning | LWX | 45 min |
| Aug 18, 8:52 PM EDT | Special Weather Statement | LWX | 23 min |
| Aug 18, 9:24 PM EDT | Special Weather Statement | LWX | 36 min |
| Aug 18, 10:45 PM EDT | Special Weather Statement | LWX | 30 min |
| Aug 18, 11:16 PM EDT | Special Weather Statement | LWX | 29 min |
| Aug 19, 3:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 19, 6:05 PM EDT | Special Weather Statement | LWX | 25 min |
| Aug 19, 6:29 PM EDT | Special Weather Statement | LWX | 31 min |
| Aug 21, 11:54 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 12:33 PM EDT | Special Weather Statement | LWX | 27 min |
| Aug 21, 12:52 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 21, 1:00 PM EDT | Special Weather Statement | LWX | 30 min |
| Aug 21, 1:12 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Aug 21, 1:24 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Aug 21, 1:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Aug 21, 1:50 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Aug 21, 7:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 21, 7:53 PM EDT | Special Weather Statement | LWX | 7 min |
| Sep 3, 9:44 AM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Sep 3, 9:51 AM EDT | Special Weather Statement | LWX | 24 min |
| Sep 6, 12:26 PM EDT | River Flood Watch | LWX | 29 hr |
| Sep 6, 12:26 PM EDT | River Flood Watch | LWX | 29 hr |
| Sep 8, 2:31 PM EDT | Flash Flood Warning | LWX | 5 hr |
| Sep 8, 7:01 PM EDT | Flash Flood Warning | LWX | 4 hr |
| Sep 8, 9:50 PM EDT | Areal Flood Warning | LWX | 4 hr |
| Sep 9, 1:47 AM EDT | Areal Flood Warning | LWX | 8 hr |
| Sep 11, 2:44 PM EDT | Special Weather Statement | LWX | 16 min |
| Sep 11, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 14, 3:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Sep 14, 5:34 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Sep 14, 6:37 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Sep 14, 10:19 PM EDT | Special Weather Statement | LWX | 41 min |
| Sep 22, 5:18 PM EDT | Special Weather Statement | LWX | 27 min |
| Sep 22, 6:00 PM EDT | Special Weather Statement | LWX | 30 min |
| Sep 27, 3:57 PM EDT | Special Weather Statement | LWX | 33 min |
| Oct 13, 4:28 PM EDT | Tornado Watch | SPC | 4 hr |
| Oct 13, 6:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Oct 19, 9:46 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Oct 29, 12:34 AM EDT | Mesoscale Discussion | SPC | 6 hr |
| Dec 7, 2:08 PM EST | Areal Flood Warning | LWX | 14 hr |
| Dec 8, 2:39 AM EST | River Flood Watch | LWX | 24 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. Rebuilt daily.