Alert archive / Maryland / Washington County
Weather alerts in Washington County, Maryland, 2016
143 weather alerts in 2016, 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 2016. Tap one for its archive.
- Alerts
- 143
- Warnings
- 49
- Watches
- 28
- Advisories
- 38
- Busiest month
- June31 alerts
- Busiest day
- June 21, 201613 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 Washington County in 2016 had a tornado report inside them.
Washington County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 35 | 25 | 29% | 13 | 85% | 27 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 14 | 1 | 93% | 2 | 50% | 8 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 305 | 212 | 30% | 851 | 81% | 20 min |
| NWS Baltimore/Washington: flash flood warnings | 45 | 24 | 47% | 61 | 89% | 88 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 10, 3:29 AM EST | Wind Advisory | LWX | 15 hr |
| Jan 12, 3:31 AM EST | Wind Advisory | LWX | 20 hr |
| Jan 17, 3:44 AM EST | Wind Chill Advisory | LWX | 56 hr |
| Jan 20, 10:13 AM EST | Winter Storm Watch | LWX | 26 hr |
| Jan 21, 12:09 PM EST | Winter Storm Warning | LWX | 58 hr |
| Jan 22, 12:34 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 22, 9:56 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 23, 4:20 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 23, 8:51 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 26, 1:29 AM EST | Freezing Rain Advisory | LWX | 10 hr |
| Feb 2, 10:39 AM EST | Flood Watch | LWX | 40 hr |
| Feb 3, 7:51 AM EST | River Flood Watch | LWX | 53 hr |
| Feb 3, 7:51 AM EST | River Flood Watch | LWX | 59 hr |
| Feb 3, 8:13 PM EST | Dense Fog Advisory | LWX | 10 hr |
| Feb 7, 8:22 PM EST | Winter Weather Advisory | LWX | 4 days |
| Feb 12, 1:12 PM EST | Wind Chill Advisory | LWX | 43 hr |
| Feb 12, 1:13 PM EST | Wind Advisory | LWX | 23 hr |
| Feb 13, 3:06 PM EST | Winter Storm Watch | LWX | 23 hr |
| Feb 14, 3:44 AM EST | Winter Storm Warning | LWX | 56 hr |
| Feb 15, 3:06 PM EST | Flood Watch | LWX | 24 hr |
| Feb 15, 8:29 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 23, 3:21 PM EST | Flood Watch | LWX | 33 hr |
| Feb 23, 5:34 PM EST | Freezing Rain Advisory | LWX | 16 hr |
| Feb 24, 4:51 PM EST | Severe Thunderstorm Warning | LWX | 39 min |
| Mar 3, 3:31 AM EST | Winter Weather Advisory | LWX | 29 hr |
| Mar 16, 1:16 AM EDT | Dense Fog Advisory | LWX | 8 hr |
| Mar 23, 9:26 PM EDT | Fire Weather Watch | LWX | 7 hr |
| Mar 24, 3:58 AM EDT | Red Flag Warning | LWX | 16 hr |
| Mar 28, 3:57 AM EDT | Wind Advisory | LWX | 17 hr |
| Apr 1, 1:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 1, 2:29 PM EDT | Freeze Watch | LWX | 14 hr |
| Apr 1, 2:29 PM EDT | High Wind Watch | LWX | 14 hr |
| Apr 1, 4:49 PM EDT | Severe Thunderstorm Warning | LWX | 14 min |
| Apr 2, 4:10 AM EDT | Freeze Warning | LWX | 29 hr |
| Apr 2, 4:10 AM EDT | High Wind Warning | LWX | 28 hr |
| Apr 2, 4:10 AM EDT | Wind Advisory | LWX | 26 hr |
| Apr 2, 9:10 PM EDT | Special Weather Statement | LWX | 2 hr |
| Apr 3, 5:49 AM EDT | Wind Advisory | LWX | 5 hr |
| Apr 3, 2:39 PM EDT | Frost Advisory | LWX | 17 hr |
| Apr 3, 2:39 PM EDT | Freeze Watch | LWX | 25 hr |
| Apr 4, 4:04 AM EDT | Freeze Warning | LWX | 30 hr |
| Apr 4, 4:43 AM EDT | Freeze Watch | LWX | 23 hr |
| Apr 5, 4:09 AM EDT | Freeze Warning | LWX | 29 hr |
| Apr 8, 4:08 AM EDT | Freeze Watch | LWX | 23 hr |
| Apr 8, 4:08 AM EDT | Freeze Warning | LWX | 24 hr |
| Apr 8, 9:27 PM EDT | Wind Advisory | LWX | 23 hr |
| Apr 9, 3:30 AM EDT | Freeze Warning | LWX | 31 hr |
| Apr 12, 1:46 PM EDT | Frost Advisory | LWX | 19 hr |
| Apr 13, 1:26 PM EDT | Frost Advisory | LWX | 20 hr |
| Apr 13, 9:21 PM EDT | Freeze Warning | LWX | 12 hr |
| Apr 14, 1:27 PM EDT | Frost Advisory | LWX | 20 hr |
| Apr 19, 3:17 AM EDT | Red Flag Warning | LWX | 17 hr |
| Apr 26, 1:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 26, 1:54 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 4, 3:34 AM EDT | Flash Flood Watch | LWX | 23 hr |
| Jun 4, 1:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 5, 1:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 5, 2:40 PM EDT | Severe Thunderstorm Warning | LWX | 53 min |
| Jun 5, 3:13 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jun 16, 4:04 AM EDT | Flash Flood Watch | LWX | 23 hr |
| Jun 16, 11:27 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 16, 1:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 16, 1:58 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 16, 3:11 PM EDT | Severe Thunderstorm Warning | LWX | 79 min |
| Jun 16, 3:38 PM EDT | Tornado Warning | LWX | 52 min |
| Jun 16, 4:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 16, 4:39 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Jun 16, 6:01 PM EDT | Severe Thunderstorm Warning | LWX | 69 min |
| Jun 16, 6:54 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 21, 12:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 21, 12:01 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 21, 12:39 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Jun 21, 12:47 PM EDT | Severe Thunderstorm Warning | LWX | 27 min |
| Jun 21, 12:50 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jun 21, 1:01 PM EDT | Severe Thunderstorm Warning | LWX | 31 min |
| Jun 21, 1:06 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 21, 1:51 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jun 21, 4:57 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Jun 21, 6:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 21, 6:31 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jun 21, 7:09 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Jun 21, 7:51 PM EDT | Severe Thunderstorm Warning | LWX | 11 min |
| Jun 21, 8:19 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Jun 21, 8:38 PM EDT | Severe Thunderstorm Warning | LWX | 37 min |
| Jun 22, 3:57 AM EDT | Flash Flood Watch | LWX | 42 hr |
| Jul 18, 1:24 PM EDT | Severe Thunderstorm Warning | LWX | 36 min |
| Jul 18, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 18, 1:53 PM EDT | Severe Thunderstorm Warning | LWX | 37 min |
| Jul 18, 2:23 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jul 23, 2:34 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 2:42 PM EDT | Heat Advisory | LWX | 29 hr |
| Jul 25, 12:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jul 25, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 25, 3:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jul 25, 4:04 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jul 25, 5:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jul 25, 7:06 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 28, 4:45 AM EDT | Flash Flood Watch | LWX | 17 hr |
| Jul 28, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jul 30, 4:02 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jul 30, 4:11 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Jul 31, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Aug 1, 2:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 6, 12:54 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 11, 7:22 PM EDT | Heat Advisory | LWX | 24 hr |
| Aug 12, 7:32 PM EDT | Heat Advisory | LWX | 25 hr |
| Aug 13, 4:37 PM EDT | Heat Advisory | LWX | 26 hr |
| Aug 13, 6:58 PM EDT | Severe Thunderstorm Warning | LWX | 32 min |
| Aug 13, 7:26 PM EDT | Severe Thunderstorm Warning | LWX | 49 min |
| Aug 13, 8:28 PM EDT | Severe Thunderstorm Warning | LWX | 31 min |
| Aug 15, 1:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Aug 15, 2:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Aug 15, 4:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Aug 16, 1:40 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 16, 2:28 PM EDT | Severe Thunderstorm Warning | LWX | 47 min |
| Aug 16, 2:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Aug 17, 2:02 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Sep 7, 3:06 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 7, 4:45 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Sep 20, 5:33 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| Sep 27, 5:30 PM EDT | Flash Flood Watch | LWX | 58 hr |
| Oct 4, 6:02 AM EDT | Dense Fog Advisory | LWX | 3 hr |
| Oct 6, 4:07 AM EDT | Dense Fog Advisory | LWX | 7 hr |
| Oct 10, 1:28 PM EDT | Frost Advisory | LWX | 20 hr |
| Oct 14, 2:31 PM EDT | Frost Advisory | LWX | 14 hr |
| Oct 21, 2:56 PM EDT | Wind Advisory | LWX | 26 hr |
| Oct 24, 4:44 PM EDT | Freeze Watch | LWX | 21 hr |
| Oct 25, 1:19 PM EDT | Freeze Warning | LWX | 20 hr |
| Oct 30, 3:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Nov 19, 3:09 AM EST | Wind Advisory | LWX | 17 hr |
| Nov 19, 8:10 PM EST | Wind Advisory | LWX | 44 hr |
| Nov 20, 3:46 AM EST | Fire Weather Watch | LWX | 23 hr |
| Nov 29, 6:11 PM EST | Dense Fog Advisory | LWX | 15 hr |
| Dec 11, 3:31 AM EST | Freezing Rain Advisory | LWX | 26 hr |
| Dec 15, 4:04 AM EST | Wind Advisory | LWX | 8 hr |
| Dec 15, 2:51 PM EST | Winter Storm Watch | LWX | 23 hr |
| Dec 16, 3:48 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Dec 17, 3:08 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 17, 8:31 AM EST | Winter Storm Warning | LWX | 4 hr |
| Dec 26, 11:51 AM EST | Wind Advisory | LWX | 22 hr |
| Dec 28, 2:02 PM EST | Wind Advisory | LWX | 52 hr |
| Dec 28, 8:29 PM EST | Winter Weather Advisory | LWX | 12 hr |
| Dec 30, 8:23 AM EST | Special Weather Statement | LWX | 82 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 | 35 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 7 |
| Mesoscale Discussion | 26 |
| Special Weather Statement | 2 |
| Flooding | |
| Flash Flood Watch | 5 |
| Flood Watch | 3 |
| River Flood Watch | 2 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Freezing Rain Advisory | 3 |
| Winter Weather Advisory | 4 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 7 |
| Freeze Watch | 5 |
| Frost Advisory | 6 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 13 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20152017
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.