Alert archive / Virginia / Arlington County
Weather alerts in Arlington County, Virginia, 2008
150 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 150
- Warnings
- 36
- Watches
- 37
- Advisories
- 40
- Busiest month
- June38 alerts
- Busiest day
- June 4, 200812 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Arlington County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 19 | 17 | 11% | 5 | 20% | 18 min |
| Flash flood warnings | 3 | 2 | 33% | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 36 | 8 | 78% | 21 | 43% | 18 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 391 | 220 | 44% | 579 | 76% | 21 min |
| NWS Baltimore/Washington: flash flood warnings | 23 | 11 | 52% | 53 | 75% | 117 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 16, 2:35 PM EST | Winter Weather Advisory | LWX | 36 hr |
| Jan 17, 12:53 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 21, 3:04 PM EST | Winter Weather Advisory | LWX | 22 hr |
| Jan 29, 3:00 PM EST | Coastal Flood Advisory | LWX | 15 hr |
| Jan 29, 3:18 PM EST | Wind Advisory | LWX | 20 hr |
| Feb 4, 11:49 PM EST | Dense Fog Advisory | LWX | 10 hr |
| Feb 6, 9:41 PM EST | Mesoscale Discussion | SPC | 64 min |
| Feb 9, 2:30 PM EST | Wind Advisory | LWX | 32 hr |
| Feb 10, 4:00 AM EST | Red Flag Warning | LWX | 18 hr |
| Feb 11, 8:58 PM EST | Winter Weather Advisory | LWX | 40 hr |
| Feb 12, 4:15 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 12, 6:43 PM EST | Ice Storm Warning | LWX | 18 hr |
| Feb 13, 1:31 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 19, 9:51 PM EST | Snow Advisory | LWX | 24 hr |
| Feb 20, 10:07 PM EST | Winter Storm Watch | LWX | 17 hr |
| Feb 21, 2:38 PM EST | Winter Storm Warning | LWX | 22 hr |
| Feb 21, 2:38 PM EST | Winter Weather Advisory | LWX | 42 hr |
| Feb 22, 12:40 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 22, 7:01 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Mar 3, 3:44 PM EST | Flood Watch | LWX | 36 hr |
| Mar 4, 5:53 PM EST | Tornado Watch | SPC | 9 hr |
| Mar 7, 11:21 AM EST | Flood Watch | LWX | 10 hr |
| Mar 7, 3:42 PM EST | Wind Advisory | LWX | 35 hr |
| Mar 18, 8:14 PM EDT | Coastal Flood Advisory | LWX | 34 hr |
| Mar 19, 8:46 PM EDT | Wind Advisory | LWX | 19 hr |
| Mar 20, 12:01 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 7, 10:32 AM EDT | Coastal Flood Advisory | LWX | 38 hr |
| Apr 10, 4:49 AM EDT | Dense Fog Advisory | LWX | 14 min |
| Apr 10, 5:02 AM EDT | Dense Fog Advisory | LWX | 5 hr |
| Apr 20, 3:12 AM EDT | Flood Watch | LWX | 27 hr |
| Apr 20, 2:33 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Apr 20, 8:43 PM EDT | Coastal Flood Advisory | LWX | 15 hr |
| Apr 21, 12:08 PM EDT | Coastal Flood Advisory | LWX | 48 hr |
| May 1, 8:34 PM EDT | Coastal Flood Advisory | LWX | 14 hr |
| May 2, 2:31 PM EDT | Coastal Flood Advisory | LWX | 6 hr |
| May 3, 9:50 PM EDT | Coastal Flood Advisory | LWX | 10 hr |
| May 8, 3:19 PM EDT | Flood Watch | LWX | 17 hr |
| May 8, 9:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 9, 12:22 AM EDT | Flash Flood Warning | LWX | 4 hr |
| May 9, 6:13 AM EDT | Areal Flood Warning | LWX | 2 hr |
| May 10, 3:49 PM EDT | Flood Watch | LWX | 46 hr |
| May 11, 10:02 AM EDT | Coastal Flood Advisory | LWX | 30 hr |
| May 11, 7:49 PM EDT | Areal Flood Warning | LWX | 4 hr |
| May 11, 11:31 PM EDT | Areal Flood Warning | LWX | 18 hr |
| May 12, 12:02 AM EDT | Coastal Flood Warning | LWX | 6 hr |
| May 14, 2:27 AM EDT | Coastal Flood Warning | LWX | 6 hr |
| May 14, 8:03 AM EDT | Coastal Flood Advisory | LWX | 24 hr |
| May 14, 9:16 PM EDT | Coastal Flood Warning | LWX | 10 hr |
| May 15, 4:06 AM EDT | Flood Watch | LWX | 26 hr |
| May 18, 3:01 AM EDT | Coastal Flood Advisory | LWX | 7 hr |
| May 31, 8:54 AM EDT | Mesoscale Discussion | SPC | 96 min |
| May 31, 10:20 AM EDT | Tornado Watch | SPC | 7 hr |
| May 31, 10:25 AM EDT | Tornado Watch | SPC | 7 hr |
| May 31, 12:48 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| May 31, 1:28 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| May 31, 2:50 PM EDT | Severe Thunderstorm Warning | LWX | 55 min |
| Jun 4, 12:18 AM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 4, 1:14 AM EDT | Flash Flood Watch | LWX | 8 hr |
| Jun 4, 11:51 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 4, 12:49 PM EDT | Tornado Watch | SPC | 7 hr |
| Jun 4, 2:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 4, 2:55 PM EDT | Severe Thunderstorm Warning | LWX | 80 min |
| Jun 4, 4:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 4, 6:07 PM EDT | Severe Thunderstorm Warning | LWX | 53 min |
| Jun 4, 6:43 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jun 4, 7:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 4, 7:34 PM EDT | Tornado Watch | SPC | 5 hr |
| Jun 4, 7:46 PM EDT | Severe Thunderstorm Warning | LWX | 42 min |
| Jun 6, 4:17 AM EDT | Excessive Heat Watch | LWX | 48 hr |
| Jun 6, 3:19 PM EDT | Heat Advisory | LWX | 29 hr |
| Jun 7, 8:08 PM EDT | Heat Advisory | LWX | 71 hr |
| Jun 10, 2:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 10, 2:54 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 10, 8:04 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Jun 10, 8:47 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jun 14, 12:10 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 16, 12:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 1:21 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 16, 3:52 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Jun 16, 6:55 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 21, 9:03 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Jun 22, 1:15 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jun 22, 4:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 8:20 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Jun 23, 5:00 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 23, 8:30 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 27, 11:37 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 12:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 4:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 28, 8:48 PM EDT | Severe Thunderstorm Warning | LWX | 62 min |
| Jun 29, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 29, 9:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 5:18 PM EDT | Severe Thunderstorm Warning | LWX | 57 min |
| Jun 30, 7:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 4, 3:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 22, 9:46 AM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 22, 10:03 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 23, 4:17 AM EDT | Flash Flood Watch | LWX | 18 hr |
| Jul 23, 3:25 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 23, 8:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jul 23, 8:34 PM EDT | Severe Thunderstorm Warning | LWX | 41 min |
| Jul 23, 8:36 PM EDT | Flash Flood Warning | LWX | 4 hr |
| Jul 23, 8:38 PM EDT | Severe Thunderstorm Warning | LWX | 52 min |
| Jul 27, 11:03 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Jul 27, 11:26 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 1:46 PM EDT | Severe Thunderstorm Warning | LWX | 44 min |
| Jul 27, 3:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 2:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 30, 4:53 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 30, 7:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Aug 2, 1:18 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 2, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 2, 5:07 PM EDT | Severe Thunderstorm Warning | LWX | 38 min |
| Aug 2, 7:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 7, 5:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 10, 1:36 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 14, 3:40 PM EDT | Severe Thunderstorm Warning | LWX | 50 min |
| Aug 14, 4:27 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 14, 6:15 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Sep 4, 5:00 AM EDT | Tropical Storm Watch | NHC | 48 hr |
| Sep 4, 5:00 PM EDT | Tropical Storm Warning | NHC | 60 hr |
| Sep 4, 5:26 PM EDT | Flash Flood Watch | LWX | 47 hr |
| Sep 4, 6:00 PM EDT | Tropical Storm Watch | LWX | 18 hr |
| Sep 5, 11:40 AM EDT | Tropical Storm Warning | LWX | 24 hr |
| Sep 6, 11:20 AM EDT | Flash Flood Warning | LWX | 6 hr |
| Sep 6, 5:13 PM EDT | Areal Flood Warning | LWX | 4 hr |
| Sep 6, 9:36 PM EDT | Coastal Flood Advisory | LWX | 6 hr |
| Sep 9, 3:47 AM EDT | Flash Flood Watch | LWX | 11 hr |
| Sep 9, 8:35 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Sep 9, 9:33 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 19, 3:08 PM EDT | Coastal Flood Advisory | LWX | 13 hr |
| Sep 20, 2:46 PM EDT | Coastal Flood Advisory | LWX | 10 hr |
| Sep 24, 2:51 PM EDT | Coastal Flood Advisory | LWX | 32 hr |
| Sep 26, 3:44 PM EDT | Coastal Flood Advisory | LWX | 30 hr |
| Oct 1, 3:36 AM EDT | Dense Fog Advisory | LWX | 5 hr |
| Oct 19, 3:39 AM EDT | Frost Advisory | LWX | 29 hr |
| Oct 20, 1:52 PM EDT | Fire Weather Watch | LWX | 20 hr |
| Oct 24, 2:52 PM EDT | Coastal Flood Advisory | LWX | 37 hr |
| Oct 28, 4:24 AM EDT | Wind Advisory | LWX | 30 hr |
| Nov 13, 7:06 PM EST | Dense Fog Advisory | LWX | 15 hr |
| Nov 15, 11:07 AM EST | Mesoscale Discussion | SPC | 53 min |
| Nov 15, 12:22 PM EST | Tornado Watch | SPC | 7 hr |
| Dec 7, 10:05 AM EST | Wind Advisory | LWX | 7 hr |
| Dec 10, 9:56 PM EST | Flood Watch | LWX | 24 hr |
| Dec 20, 3:17 PM EST | Winter Weather Advisory | LWX | 18 hr |
| Dec 20, 11:55 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 21, 3:21 PM EST | Wind Advisory | LWX | 21 hr |
| Dec 23, 3:40 PM EST | Winter Weather Advisory | LWX | 18 hr |
| Dec 30, 2:58 PM EST | Wind Advisory | LWX | 31 hr |
| Dec 31, 11:18 AM EST | Red Flag Warning | LWX | 7 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 | 19 |
| Severe Thunderstorm Watch | 15 |
| Tornado Watch | 6 |
| Mesoscale Discussion | 37 |
| Flooding | |
| Areal Flood Warning | 5 |
| Flash Flood Warning | 3 |
| Flash Flood Watch | 4 |
| Flood Watch | 7 |
| Winter | |
| Ice Storm Warning | 1 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Snow Advisory | 1 |
| Winter Weather Advisory | 6 |
| Heat | |
| Excessive Heat Watch | 1 |
| Heat Advisory | 2 |
| Cold | |
| Frost Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 8 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 5 |
| Tropical | |
| Tropical Storm Warning | 2 |
| Tropical Storm Watch | 2 |
| Coast and beach | |
| Coastal Flood Warning | 3 |
| Coastal Flood Advisory | 17 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.