Alert archive / Virginia / Arlington County
Weather alerts in Arlington County, Virginia, 2019
185 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Arlington County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 185
- Warnings
- 45
- Watches
- 36
- Advisories
- 54
- Busiest month
- July44 alerts
- Busiest day
- August 20, 20197 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 Arlington County in 2019 had a tornado report inside them.
Arlington County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 26 | 24 | 8% | 4 | 100% | 15 min |
| Flash flood warnings | 3 | 3 | 0% | 2 | 100% | 126 min |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 34 | 4 | 88% | 8 | 50% | 5 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 694 | 468 | 33% | 1,610 | 81% | 19 min |
| NWS Baltimore/Washington: flash flood warnings | 36 | 16 | 56% | 74 | 96% | 103 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 11, 2:17 PM EST | Winter Storm Warning | LWX | 56 hr |
| Jan 11, 2:17 PM EST | Winter Weather Advisory | LWX | 56 hr |
| Jan 13, 6:19 PM EST | Special Weather Statement | LWX | 116 min |
| Jan 13, 9:47 PM EST | Winter Weather Advisory | LWX | 20 hr |
| Jan 17, 3:41 AM EST | Winter Weather Advisory | LWX | 30 hr |
| Jan 19, 1:44 PM EST | Wind Advisory | LWX | 29 hr |
| Jan 20, 3:44 AM EST | Wind Chill Advisory | LWX | 31 hr |
| Jan 21, 8:55 AM EST | Wind Advisory | LWX | 4 hr |
| Jan 23, 4:03 AM EST | Flood Watch | LWX | 35 hr |
| Jan 23, 12:54 PM EST | Wind Advisory | LWX | 21 hr |
| Jan 28, 2:58 PM EST | Winter Weather Advisory | LWX | 29 hr |
| Jan 29, 9:00 PM EST | Wind Advisory | LWX | 20 hr |
| Jan 30, 3:33 AM EST | Wind Chill Advisory | LWX | 30 hr |
| Jan 31, 3:27 PM EST | Winter Weather Advisory | LWX | 27 hr |
| Feb 7, 8:32 PM EST | Dense Fog Advisory | LWX | 8 hr |
| Feb 10, 3:02 AM EST | Winter Weather Advisory | LWX | 61 hr |
| Feb 18, 3:38 AM EST | Winter Storm Watch | LWX | 23 hr |
| Feb 19, 2:47 AM EST | Winter Storm Warning | LWX | 46 hr |
| Feb 19, 2:47 AM EST | Winter Weather Advisory | LWX | 46 hr |
| Feb 23, 3:01 PM EST | High Wind Warning | LWX | 44 hr |
| Feb 23, 3:01 PM EST | Wind Advisory | LWX | 44 hr |
| Feb 24, 3:02 AM EST | Wind Advisory | LWX | 38 hr |
| Feb 28, 9:28 AM EST | Winter Weather Advisory | LWX | 24 hr |
| Mar 19, 10:00 AM EDT | Special Weather Statement | LWX | 15 min |
| Mar 20, 8:53 PM EDT | Flood Watch | LWX | 26 hr |
| Mar 21, 2:51 PM EDT | Coastal Flood Advisory | LWX | 10 hr |
| Mar 21, 4:01 PM EDT | Areal Flood Warning | LWX | 24 hr |
| Mar 21, 6:29 PM EDT | Areal Flood Warning | LWX | 8 hr |
| Mar 22, 4:54 AM EDT | Coastal Flood Advisory | LWX | 6 hr |
| Mar 22, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Apr 3, 3:56 AM EDT | Red Flag Warning | LWX | 16 hr |
| Apr 14, 6:08 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 14, 7:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 15, 1:18 AM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Apr 15, 3:51 AM EDT | Wind Advisory | LWX | 16 hr |
| Apr 18, 2:07 PM EDT | Flash Flood Watch | LWX | 32 hr |
| Apr 19, 12:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 19, 12:48 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 19, 4:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Apr 19, 5:28 PM EDT | Coastal Flood Advisory | LWX | 21 hr |
| Apr 19, 6:21 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 20, 2:40 PM EDT | Coastal Flood Advisory | LWX | 9 hr |
| Apr 26, 11:37 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 26, 1:33 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 26, 2:25 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Apr 26, 5:39 PM EDT | Wind Advisory | LWX | 19 hr |
| May 2, 4:30 AM EDT | Dense Fog Advisory | LWX | 4 hr |
| May 2, 3:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 2, 3:38 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| May 4, 4:05 AM EDT | Flash Flood Watch | LWX | 30 hr |
| May 4, 11:10 PM EDT | Areal Flood Warning | LWX | 6 hr |
| May 6, 2:24 PM EDT | Coastal Flood Advisory | LWX | 19 hr |
| May 6, 4:34 PM EDT | Coastal Flood Advisory | LWX | 21 hr |
| May 13, 10:04 AM EDT | Coastal Flood Advisory | LWX | 21 hr |
| May 14, 8:48 AM EDT | Coastal Flood Advisory | LWX | 21 hr |
| May 16, 2:16 AM EDT | Coastal Flood Advisory | LWX | 9 hr |
| May 23, 1:02 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 23, 3:36 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| May 23, 3:42 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 23, 3:47 PM EDT | Tornado Warning | LWX | 11 min |
| May 25, 5:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 26, 11:14 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 26, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 5:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 8:32 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 26, 10:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| May 30, 12:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 30, 3:10 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| May 30, 3:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 2, 12:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 3:33 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 2, 5:21 PM EDT | Severe Thunderstorm Warning | LWX | 39 min |
| Jun 2, 5:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Jun 13, 3:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 13, 4:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jun 16, 1:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 17, 3:57 AM EDT | Flash Flood Watch | LWX | 15 hr |
| Jun 17, 2:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 17, 4:05 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 3:38 AM EDT | Flash Flood Watch | LWX | 19 hr |
| Jun 18, 12:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 18, 2:11 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 20, 3:37 AM EDT | Coastal Flood Advisory | LWX | 11 hr |
| Jun 20, 12:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 7:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 5:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 2:04 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 2, 5:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 7:41 PM EDT | Severe Thunderstorm Warning | LWX | 34 min |
| Jul 4, 11:23 AM EDT | Flash Flood Watch | LWX | 12 hr |
| Jul 4, 12:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 6, 1:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 6, 6:45 PM EDT | Severe Thunderstorm Warning | LWX | 60 min |
| Jul 6, 7:35 PM EDT | Severe Thunderstorm Warning | LWX | 55 min |
| Jul 7, 4:06 AM EDT | Flash Flood Watch | LWX | 34 hr |
| Jul 8, 7:46 AM EDT | Flash Flood Warning | LWX | 5 hr |
| Jul 8, 8:20 AM EDT | Flash Flood Warning | LWX | 5 hr |
| Jul 8, 9:21 AM EDT | Flash Flood Warning | LWX | 114 min |
| Jul 8, 11:43 AM EDT | Coastal Flood Advisory | LWX | 16 hr |
| Jul 8, 12:53 PM EDT | Areal Flood Warning | LWX | 5 hr |
| Jul 11, 4:18 AM EDT | Flash Flood Watch | LWX | 15 hr |
| Jul 11, 12:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 11, 5:59 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 3:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 16, 8:49 PM EDT | Heat Advisory | LWX | 22 hr |
| Jul 17, 1:29 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 17, 4:51 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 17, 5:23 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jul 17, 5:35 PM EDT | Severe Thunderstorm Warning | LWX | 40 min |
| Jul 17, 8:57 PM EDT | Excessive Heat Watch | LWX | 6 hr |
| Jul 17, 8:57 PM EDT | Excessive Heat Watch | LWX | 19 hr |
| Jul 18, 11:09 AM EDT | Excessive Heat Watch | LWX | 28 hr |
| Jul 18, 11:09 AM EDT | Excessive Heat Watch | LWX | 58 hr |
| Jul 18, 1:49 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 3:43 PM EDT | Heat Advisory | LWX | 29 hr |
| Jul 19, 3:52 AM EDT | Excessive Heat Warning | LWX | 17 hr |
| Jul 19, 3:05 PM EDT | Excessive Heat Warning | LWX | 30 hr |
| Jul 20, 8:49 PM EDT | Excessive Heat Warning | LWX | 24 hr |
| Jul 20, 9:18 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Jul 21, 2:48 PM EDT | Flash Flood Watch | LWX | 37 hr |
| Jul 21, 6:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 21, 7:32 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Jul 22, 1:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 22, 2:17 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 22, 7:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 22, 8:15 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Jul 22, 8:21 PM EDT | Severe Thunderstorm Warning | LWX | 24 min |
| Jul 22, 8:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Jul 31, 12:02 PM EDT | Flash Flood Watch | LWX | 7 hr |
| Jul 31, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 31, 4:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 6, 8:16 PM EDT | Severe Thunderstorm Warning | LWX | 22 min |
| Aug 7, 1:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 7, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 7, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Aug 7, 3:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 9, 2:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Aug 15, 3:16 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Aug 19, 10:47 PM EDT | Severe Thunderstorm Warning | LWX | 43 min |
| Aug 19, 11:06 PM EDT | Severe Thunderstorm Warning | LWX | 15 min |
| Aug 20, 2:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 20, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 20, 4:34 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Aug 20, 5:33 PM EDT | Severe Thunderstorm Warning | LWX | 27 min |
| Aug 20, 7:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 3:27 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 26, 2:20 PM EDT | Coastal Flood Advisory | LWX | 42 hr |
| Aug 27, 9:44 AM EDT | Coastal Flood Advisory | LWX | 23 hr |
| Sep 6, 3:22 AM EDT | Coastal Flood Watch | LWX | 36 hr |
| Sep 7, 3:15 PM EDT | Coastal Flood Advisory | LWX | 35 hr |
| Sep 11, 3:08 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 11, 4:57 PM EDT | Severe Thunderstorm Warning | LWX | 48 min |
| Sep 12, 2:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Sep 13, 10:07 PM EDT | Coastal Flood Advisory | LWX | 24 hr |
| Sep 17, 8:34 PM EDT | Coastal Flood Advisory | LWX | 59 hr |
| Sep 27, 3:09 PM EDT | Coastal Flood Advisory | LWX | 32 hr |
| Sep 28, 5:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 30, 11:32 AM EDT | Coastal Flood Advisory | LWX | 39 hr |
| Oct 5, 2:12 PM EDT | Coastal Flood Advisory | LWX | 42 hr |
| Oct 9, 1:03 PM EDT | Coastal Flood Advisory | LWX | 5 days |
| Oct 9, 8:47 PM EDT | Coastal Flood Watch | LWX | 3 days |
| Oct 11, 12:52 AM EDT | Coastal Flood Warning | LWX | 64 hr |
| Oct 16, 3:51 AM EDT | Wind Advisory | LWX | 34 hr |
| Oct 20, 11:05 PM EDT | Coastal Flood Advisory | LWX | 4 hr |
| Oct 21, 6:14 PM EDT | Coastal Flood Advisory | LWX | 36 hr |
| Oct 27, 5:25 AM EDT | Coastal Flood Advisory | LWX | 18 hr |
| Oct 29, 9:26 AM EDT | Coastal Flood Advisory | LWX | 15 hr |
| Oct 29, 8:02 PM EDT | Coastal Flood Advisory | LWX | 29 hr |
| Oct 31, 3:48 AM EDT | Wind Advisory | LWX | 24 hr |
| Oct 31, 1:11 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 31, 1:58 PM EDT | Coastal Flood Warning | LWX | 12 hr |
| Oct 31, 1:58 PM EDT | Coastal Flood Advisory | LWX | 15 hr |
| Oct 31, 2:56 PM EDT | Tornado Watch | SPC | 10 hr |
| Oct 31, 4:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Oct 31, 7:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 31, 10:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Nov 1, 1:00 AM EDT | Areal Flood Warning | LWX | 4 hr |
| Nov 1, 4:07 AM EDT | Freeze Watch | LWX | 5 hr |
| Nov 1, 9:17 AM EDT | Freeze Warning | LWX | 24 hr |
| Nov 18, 2:23 PM EST | Coastal Flood Advisory | LWX | 37 hr |
| Nov 26, 2:47 PM EST | Wind Advisory | LWX | 45 hr |
| Dec 13, 4:59 PM EST | Dense Fog Advisory | LWX | 6 hr |
| Dec 17, 11:47 AM EST | Dense Fog Advisory | LWX | 3 hr |
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 | 26 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 13 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 48 |
| Special Weather Statement | 2 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 9 |
| Flood Watch | 2 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 8 |
| Heat | |
| Excessive Heat Warning | 3 |
| Excessive Heat Watch | 4 |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 11 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
| Coast and beach | |
| Coastal Flood Warning | 2 |
| Coastal Flood Watch | 2 |
| Coastal Flood Advisory | 27 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20182020
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.