Alert archive / Virginia / Rockingham County
Weather alerts in Rockingham County, Virginia, 2017
91 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Rockingham County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 91
- Warnings
- 28
- Watches
- 12
- Advisories
- 34
- Busiest month
- March16 alerts
- Busiest day
- March 1, 20177 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Rockingham County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 7 | 30% | 10 | 100% | 11 min |
| Flash flood warnings | 4 | 4 | 0% | 7 | 100% | 79 min |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Baltimore/Washington: tornado warnings | 11 | 4 | 64% | 18 | 33% | 7 min |
| NWS Baltimore/Washington: severe thunderstorm warnings | 261 | 194 | 26% | 976 | 81% | 19 min |
| NWS Baltimore/Washington: flash flood warnings | 49 | 34 | 31% | 130 | 81% | 78 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 6, 8:48 AM EST | Winter Weather Advisory | LWX | 30 hr |
| Jan 6, 2:12 PM EST | Wind Chill Advisory | LWX | 61 hr |
| Jan 10, 1:32 PM EST | Freezing Rain Advisory | LWX | 14 hr |
| Jan 13, 3:32 AM EST | Freezing Rain Advisory | LWX | 36 hr |
| Jan 21, 12:06 AM EST | Dense Fog Advisory | LWX | 13 hr |
| Jan 22, 1:51 PM EST | Wind Advisory | LWX | 26 hr |
| Jan 23, 10:37 AM EST | Flood Watch | LWX | 5 hr |
| Jan 23, 12:18 PM EST | Winter Weather Advisory | LWX | 17 hr |
| Jan 26, 3:35 AM EST | Wind Advisory | LWX | 15 hr |
| Jan 29, 3:42 AM EST | Winter Weather Advisory | LWX | 33 hr |
| Jan 31, 4:01 AM EST | Wind Advisory | LWX | 12 hr |
| Feb 7, 7:12 PM EST | Wind Advisory | LWX | 8 hr |
| Feb 8, 10:17 AM EST | Winter Weather Advisory | LWX | 21 hr |
| Feb 10, 8:40 PM EST | Wind Advisory | LWX | 12 hr |
| Feb 11, 2:22 PM EST | High Wind Watch | LWX | 13 hr |
| Feb 12, 3:36 AM EST | High Wind Warning | LWX | 32 hr |
| Feb 12, 3:36 AM EST | Wind Advisory | LWX | 37 hr |
| Mar 1, 9:44 AM EST | Mesoscale Discussion | SPC | 91 min |
| Mar 1, 10:38 AM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 1, 11:56 AM EST | Severe Thunderstorm Warning | LWX | 49 min |
| Mar 1, 12:25 PM EST | Mesoscale Discussion | SPC | 65 min |
| Mar 1, 12:26 PM EST | Severe Thunderstorm Warning | LWX | 49 min |
| Mar 1, 12:32 PM EST | Severe Thunderstorm Warning | LWX | 43 min |
| Mar 1, 2:47 PM EST | Wind Advisory | LWX | 18 hr |
| Mar 11, 7:52 PM EST | Winter Storm Watch | LWX | 31 hr |
| Mar 12, 2:58 PM EDT | Winter Storm Warning | LWX | 47 hr |
| Mar 13, 4:00 AM EDT | Winter Weather Advisory | LWX | 34 hr |
| Mar 14, 3:22 AM EDT | Mesoscale Discussion | SPC | 5 hr |
| Mar 14, 3:00 PM EDT | Wind Chill Advisory | LWX | 19 hr |
| Mar 15, 3:52 AM EDT | Wind Advisory | LWX | 16 hr |
| Mar 15, 1:42 PM EDT | Wind Chill Advisory | LWX | 19 hr |
| Mar 18, 3:26 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 21, 10:00 AM EDT | Special Weather Statement | LWX | 15 min |
| Apr 6, 12:50 PM EDT | Wind Advisory | LWX | 30 hr |
| Apr 6, 4:24 PM EDT | Freeze Watch | LWX | 21 hr |
| Apr 7, 1:31 PM EDT | Freeze Warning | LWX | 19 hr |
| Apr 8, 2:10 PM EDT | Freeze Warning | LWX | 18 hr |
| Apr 20, 4:55 PM EDT | Severe Thunderstorm Warning | LWX | 35 min |
| Apr 21, 4:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 30, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| May 1, 2:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 1, 5:54 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 2, 4:40 AM EDT | Wind Advisory | LWX | 13 hr |
| May 4, 11:48 AM EDT | Flood Watch | LWX | 23 hr |
| May 8, 12:41 PM EDT | Frost Advisory | LWX | 19 hr |
| May 8, 12:41 PM EDT | Freeze Warning | LWX | 19 hr |
| May 19, 3:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 25, 10:25 AM EDT | Areal Flood Warning | LWX | 10 hr |
| May 25, 8:34 PM EDT | Areal Flood Warning | LWX | 6 hr |
| May 26, 2:06 AM EDT | Areal Flood Warning | LWX | 6 hr |
| May 27, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 4:01 PM EDT | Severe Thunderstorm Warning | LWX | 30 min |
| Jun 16, 1:30 PM EDT | Flash Flood Watch | LWX | 7 hr |
| Jun 16, 1:52 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 16, 3:16 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 16, 4:08 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jun 16, 4:34 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Jun 16, 6:08 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Jun 16, 7:05 PM EDT | Areal Flood Warning | LWX | 3 hr |
| Jun 19, 12:48 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 19, 1:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Jun 19, 2:18 PM EDT | Areal Flood Warning | LWX | 4 hr |
| Jul 6, 6:20 AM EDT | Flash Flood Watch | LWX | 20 hr |
| Jul 7, 3:35 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 14, 1:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 14, 4:02 PM EDT | Severe Thunderstorm Warning | LWX | 26 min |
| Jul 14, 4:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 18, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 18, 7:08 PM EDT | Flash Flood Warning | LWX | 3 hr |
| Jul 21, 2:54 PM EDT | Severe Thunderstorm Warning | LWX | 51 min |
| Jul 27, 1:47 PM EDT | Flash Flood Watch | LWX | 48 hr |
| Jul 28, 4:46 PM EDT | Areal Flood Warning | LWX | 6 hr |
| Aug 4, 7:17 PM EDT | Severe Thunderstorm Warning | LWX | 28 min |
| Aug 4, 7:44 PM EDT | Severe Thunderstorm Warning | LWX | 46 min |
| Aug 15, 10:31 PM EDT | Dense Fog Advisory | LWX | 11 hr |
| Sep 5, 2:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Oct 16, 12:30 PM EDT | Frost Advisory | LWX | 20 hr |
| Oct 17, 1:39 PM EDT | Freeze Warning | LWX | 19 hr |
| Oct 23, 6:31 PM EDT | Wind Advisory | LWX | 10 hr |
| Oct 23, 7:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Oct 29, 3:44 AM EDT | Wind Advisory | LWX | 30 hr |
| Nov 16, 5:47 AM EST | Wind Advisory | LWX | 9 hr |
| Nov 18, 3:40 AM EST | Wind Advisory | LWX | 33 hr |
| Dec 8, 5:50 AM EST | Winter Weather Advisory | LWX | 51 hr |
| Dec 11, 1:19 PM EST | Wind Chill Advisory | LWX | 47 hr |
| Dec 13, 11:50 PM EST | Wind Advisory | LWX | 12 hr |
| Dec 24, 10:35 AM EST | Wind Advisory | LWX | 26 hr |
| Dec 27, 1:36 PM EST | Wind Chill Advisory | LWX | 18 hr |
| Dec 30, 2:12 PM EST | Wind Chill Advisory | LWX | 69 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 | 10 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 1 |
| Flooding | |
| Areal Flood Warning | 8 |
| Flash Flood Warning | 4 |
| Flash Flood Watch | 3 |
| Flood Watch | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 2 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 6 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 16 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.