Alert archive / Maryland / Howard County
Weather alerts in Howard County, Maryland, 2010
149 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Howard County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 149
- Warnings
- 52
- Watches
- 21
- Advisories
- 0
- Busiest month
- July27 alerts
- Busiest day
- July 25, 201010 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 5 tornado warnings covering Howard County in 2010 had a tornado report inside them.
Howard County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 5 | 1 | 80% | 0 | ||
| Severe thunderstorm warnings | 33 | 30 | 9% | 6 | 67% | 20 min |
| Flash flood warnings | 11 | 7 | 36% | 2 | 100% | 283 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 31 | 2 | 94% | 4 | 50% | 17 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 257 | 198 | 23% | 762 | 86% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 64 | 35 | 45% | 139 | 92% | 166 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 |
|---|---|---|---|
| Feb 5, 11:45 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 5, 6:58 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 6:53 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 6, 12:03 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 9, 7:04 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 7:27 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 10, 12:20 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 13, 11:23 AM EST | Areal Flood Warning | LWX | 10 hr |
| Mar 13, 2:17 PM EST | Areal Flood Warning | LWX | 6 hr |
| Mar 14, 4:40 AM EDT | Areal Flood Warning | LWX | 4 hr |
| Apr 8, 8:00 PM EDT | Special Weather Statement | LWX | 60 min |
| Apr 8, 8:12 PM EDT | Severe Thunderstorm Warning | LWX | 31 min |
| Apr 16, 4:17 PM EDT | Special Weather Statement | LWX | 58 min |
| Apr 16, 4:28 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Apr 16, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Apr 16, 6:16 PM EDT | Special Weather Statement | LWX | 74 min |
| Apr 16, 6:20 PM EDT | Special Weather Statement | LWX | 70 min |
| Apr 16, 8:05 PM EDT | Special Weather Statement | LWX | 70 min |
| Apr 25, 10:56 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 25, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 25, 6:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 25, 7:04 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Apr 25, 7:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Apr 25, 7:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Apr 25, 8:05 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Apr 25, 8:36 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Apr 25, 8:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 25, 9:59 PM EDT | Flash Flood Warning | LWX | 46 min |
| Apr 25, 10:04 PM EDT | Special Weather Statement | LWX | 26 min |
| May 2, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| May 2, 5:58 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 2, 8:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 12, 5:00 PM EDT | Special Weather Statement | LWX | 30 min |
| May 12, 5:26 PM EDT | Special Weather Statement | LWX | 34 min |
| May 14, 11:56 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 2:29 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 14, 6:35 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 27, 11:28 AM EDT | Mesoscale Discussion | SPC | 92 min |
| May 27, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 27, 4:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 27, 8:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 27, 11:45 PM EDT | Special Weather Statement | LWX | 60 min |
| May 28, 1:02 AM EDT | Special Weather Statement | LWX | 43 min |
| Jun 3, 11:27 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 3, 1:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 3, 3:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 3, 4:23 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jun 3, 5:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 3, 6:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 4, 1:09 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 4, 2:39 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 4, 4:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 4, 5:30 PM EDT | Special Weather Statement | LWX | 30 min |
| Jun 4, 7:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 6, 11:42 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 6, 12:40 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 6, 1:43 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Jun 12, 2:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 12, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 22, 11:35 AM EDT | Mesoscale Discussion | SPC | 25 min |
| Jun 22, 3:48 PM EDT | Mesoscale Discussion | SPC | 27 min |
| Jun 22, 7:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jun 22, 7:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jun 24, 12:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 24, 12:28 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 24, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 28, 12:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:12 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 2:52 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 12, 3:30 PM EDT | Special Weather Statement | LWX | 30 min |
| Jul 13, 6:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jul 14, 12:38 AM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 18, 11:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jul 20, 4:33 PM EDT | Special Weather Statement | LWX | 42 min |
| Jul 20, 4:44 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jul 20, 4:59 PM EDT | Tornado Warning | LWX | 31 min |
| Jul 25, 10:48 AM EDT | Mesoscale Discussion | SPC | 27 min |
| Jul 25, 12:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 25, 1:21 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 25, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 2:29 PM EDT | Severe Thunderstorm Warning | LWX | 61 min |
| Jul 25, 2:36 PM EDT | Severe Thunderstorm Warning | LWX | 54 min |
| Jul 25, 3:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jul 25, 3:18 PM EDT | Tornado Warning | LWX | 27 min |
| Jul 25, 3:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 25, 3:42 PM EDT | Severe Thunderstorm Warning | LWX | 63 min |
| Jul 29, 11:36 AM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 29, 11:54 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 29, 12:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jul 29, 12:53 PM EDT | Special Weather Statement | LWX | 37 min |
| Jul 29, 1:10 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Jul 29, 3:41 PM EDT | Special Weather Statement | LWX | 34 min |
| Jul 29, 3:58 PM EDT | Severe Thunderstorm Warning | LWX | 25 min |
| Jul 29, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 29, 4:29 PM EDT | Special Weather Statement | LWX | 31 min |
| Aug 4, 5:30 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Aug 4, 5:52 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 4, 7:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 4, 7:53 PM EDT | Special Weather Statement | LWX | 37 min |
| Aug 4, 8:35 PM EDT | Special Weather Statement | LWX | 40 min |
| Aug 5, 12:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Aug 5, 1:19 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 5, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 5, 6:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 12, 6:10 AM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Aug 12, 6:28 AM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Aug 12, 7:01 AM EDT | Mesoscale Discussion | SPC | 119 min |
| Aug 12, 1:52 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 12, 2:51 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 12, 4:48 PM EDT | Tornado Warning | LWX | 27 min |
| Aug 12, 5:13 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Aug 12, 5:17 PM EDT | Tornado Warning | LWX | 43 min |
| Aug 12, 5:49 PM EDT | Flash Flood Warning | LWX | 115 min |
| Aug 12, 10:40 PM EDT | Flash Flood Warning | LWX | 2 hr |
| Aug 16, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 16, 2:13 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 22, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Sep 22, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 22, 7:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Sep 27, 12:03 PM EDT | Special Weather Statement | LWX | 42 min |
| Sep 27, 12:12 PM EDT | Tornado Warning | LWX | 33 min |
| Sep 27, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Sep 27, 1:12 PM EDT | Special Weather Statement | LWX | 48 min |
| Sep 27, 1:21 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Sep 27, 1:38 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Sep 30, 4:55 AM EDT | Tornado Watch | SPC | 8 hr |
| Sep 30, 6:39 AM EDT | Flash Flood Warning | LWX | 6 hr |
| Sep 30, 8:25 AM EDT | Mesoscale Discussion | SPC | 95 min |
| Sep 30, 10:38 AM EDT | Flash Flood Warning | LWX | 6 hr |
| Sep 30, 10:49 AM EDT | Severe Thunderstorm Warning | LWX | 26 min |
| Sep 30, 10:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 30, 12:22 PM EDT | Flash Flood Warning | LWX | 6 hr |
| Sep 30, 4:40 PM EDT | Flash Flood Warning | LWX | 11 hr |
| Sep 30, 6:13 PM EDT | Flash Flood Warning | LWX | 6 hr |
| Oct 26, 7:19 PM EDT | Tornado Watch | SPC | 12 hr |
| Oct 26, 11:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Oct 27, 12:24 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Oct 27, 11:54 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Oct 27, 12:13 PM EDT | Tornado Watch | SPC | 8 hr |
| Nov 16, 11:52 PM EST | Special Weather Statement | LWX | 23 min |
| Nov 16, 11:59 PM EST | Severe Thunderstorm Warning | LWX | 46 min |
| Nov 17, 12:06 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Nov 17, 12:35 AM EST | Severe Thunderstorm Warning | LWX | 40 min |
| Nov 17, 1:04 AM EST | Severe Thunderstorm Warning | LWX | 86 min |
| Dec 1, 3:48 AM EST | Tornado Watch | SPC | 7 hr |
| Dec 1, 7:51 AM EST | Mesoscale Discussion | SPC | 84 min |
| Dec 1, 8:03 AM EST | Severe Thunderstorm Warning | LWX | 42 min |
| Dec 1, 9:00 AM EST | Severe Thunderstorm Warning | LWX | 75 min |
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 | 33 |
| Tornado Warning | 5 |
| Severe Thunderstorm Watch | 16 |
| Tornado Watch | 5 |
| Mesoscale Discussion | 55 |
| Special Weather Statement | 21 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 11 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.