Alert archive / Virginia / Roanoke County
Weather alerts in Roanoke County, Virginia, 2024
101 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Roanoke County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 101
- Warnings
- 28
- Watches
- 13
- Advisories
- 33
- Busiest month
- September16 alerts
- Busiest day
- August 31, 20247 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 2 tornado warnings covering Roanoke County in 2024 had a tornado report inside them.
Roanoke County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 15 | 11 | 27% | 10 | 80% | 20 min |
| Flash flood warnings | 3 | 1 | 67% | 1 | 100% | 28 min |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 72 | 5 | 93% | 23 | 26% | 17 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 192 | 148 | 23% | 738 | 66% | 24 min |
| NWS Blacksburg, VA: flash flood warnings | 89 | 53 | 40% | 210 | 73% | 169 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 4, 2:24 PM EST | Winter Storm Watch | RNK | 14 hr |
| Jan 5, 4:32 AM EST | Winter Storm Warning | RNK | 34 hr |
| Jan 6, 3:28 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 8, 2:57 PM EST | Wind Advisory | RNK | 46 hr |
| Jan 8, 3:18 PM EST | Flood Watch | RNK | 30 hr |
| Jan 9, 1:44 PM EST | Areal Flood Warning | RNK | 10 hr |
| Jan 9, 2:59 PM EST | River Flood Warning | RNK | 15 hr |
| Jan 11, 3:51 AM EST | Wind Advisory | RNK | 60 hr |
| Jan 11, 1:08 PM EST | Flood Watch | RNK | 31 hr |
| Jan 14, 3:24 AM EST | Winter Weather Advisory | RNK | 52 hr |
| Jan 16, 2:54 AM EST | Wind Chill Advisory | RNK | 33 hr |
| Jan 19, 2:34 PM EST | Wind Chill Advisory | RNK | 43 hr |
| Jan 26, 2:35 PM EST | Flood Watch | RNK | 40 hr |
| Feb 10, 10:47 AM EST | Special Weather Statement | RNK | 28 min |
| Feb 12, 3:29 AM EST | Wind Advisory | RNK | 33 hr |
| Feb 13, 12:45 AM EST | Special Weather Statement | RNK | 45 min |
| Feb 27, 2:02 PM EST | Wind Advisory | RNK | 35 hr |
| Feb 28, 12:38 PM EST | Special Weather Statement | RNK | 52 min |
| Feb 28, 1:12 PM EST | Severe Thunderstorm Warning | RNK | 48 min |
| Mar 9, 2:32 AM EST | Wind Advisory | RNK | 56 hr |
| Mar 10, 1:46 AM EST | High Wind Warning | RNK | 33 hr |
| Mar 18, 3:05 PM EDT | Fire Weather Watch | RNK | 24 hr |
| Mar 19, 3:02 PM EDT | Red Flag Warning | RNK | 29 hr |
| Mar 20, 12:27 PM EDT | Wind Advisory | RNK | 8 hr |
| Mar 28, 8:51 PM EDT | Wind Advisory | RNK | 23 hr |
| Apr 1, 10:01 PM EDT | Special Weather Statement | RNK | 59 min |
| Apr 11, 3:11 PM EDT | Wind Advisory | RNK | 51 hr |
| Apr 11, 6:43 PM EDT | Tornado Watch | SPC | 4 hr |
| Apr 11, 9:07 PM EDT | Special Weather Statement | RNK | 38 min |
| Apr 11, 9:46 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Apr 11, 9:49 PM EDT | Special Weather Statement | RNK | 26 min |
| Apr 15, 1:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Apr 15, 1:50 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 15, 4:40 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 15, 6:57 PM EDT | Mesoscale Discussion | SPC | 93 min |
| May 7, 5:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 22, 4:34 PM EDT | Special Weather Statement | RNK | 26 min |
| May 22, 4:36 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| May 26, 1:46 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 26, 5:35 PM EDT | Severe Thunderstorm Warning | RNK | 55 min |
| May 26, 5:36 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 26, 6:24 PM EDT | Severe Thunderstorm Warning | RNK | 66 min |
| Jun 5, 5:38 PM EDT | Areal Flood Advisory | RNK | 2 hr |
| Jun 17, 5:43 PM EDT | Special Weather Statement | RNK | 17 min |
| Jun 17, 6:20 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 4, 2:39 PM EDT | Heat Advisory | RNK | 29 hr |
| Jul 4, 5:03 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Jul 5, 4:31 PM EDT | Severe Thunderstorm Warning | RNK | 44 min |
| Jul 5, 4:46 PM EDT | Severe Thunderstorm Warning | RNK | 44 min |
| Jul 5, 5:02 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| Jul 15, 8:54 PM EDT | Special Weather Statement | RNK | 36 min |
| Jul 18, 9:06 AM EDT | Special Weather Statement | RNK | 24 min |
| Jul 18, 9:38 AM EDT | Special Weather Statement | RNK | 37 min |
| Jul 21, 3:41 AM EDT | Dense Fog Advisory | RNK | 5 hr |
| Jul 22, 7:07 PM EDT | Special Weather Statement | RNK | 38 min |
| Jul 22, 7:43 PM EDT | Special Weather Statement | RNK | 62 min |
| Jul 23, 10:29 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Aug 6, 2:04 PM EDT | Flood Watch | RNK | 62 hr |
| Aug 7, 5:30 PM EDT | River Flood Warning | RNK | 66 hr |
| Aug 8, 5:32 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Aug 29, 4:12 PM EDT | Special Weather Statement | RNK | 33 min |
| Aug 29, 7:10 PM EDT | Severe Thunderstorm Warning | RNK | 40 min |
| Aug 30, 2:06 PM EDT | Special Weather Statement | RNK | 39 min |
| Aug 31, 1:27 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 31, 3:15 PM EDT | Special Weather Statement | RNK | 30 min |
| Aug 31, 3:20 PM EDT | Severe Thunderstorm Warning | RNK | 40 min |
| Aug 31, 4:02 PM EDT | Special Weather Statement | RNK | 28 min |
| Aug 31, 4:35 PM EDT | Severe Thunderstorm Warning | RNK | 55 min |
| Aug 31, 5:25 PM EDT | Severe Thunderstorm Warning | RNK | 32 min |
| Aug 31, 6:36 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Aug 31, 8:10 PM EDT | Severe Thunderstorm Warning | RNK | 31 min |
| Sep 21, 2:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 23, 6:09 PM EDT | Special Weather Statement | RNK | 51 min |
| Sep 24, 2:41 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Sep 24, 4:02 PM EDT | Severe Thunderstorm Warning | RNK | 58 min |
| Sep 25, 2:12 AM EDT | Flood Watch | RNK | 66 hr |
| Sep 25, 8:39 PM EDT | Severe Thunderstorm Warning | RNK | 45 min |
| Sep 25, 10:28 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| Sep 26, 2:09 PM EDT | Wind Advisory | RNK | 30 hr |
| Sep 26, 10:48 PM EDT | Tornado Warning | RNK | 29 min |
| Sep 27, 10:21 AM EDT | Flash Flood Warning | RNK | 7 hr |
| Sep 27, 1:57 PM EDT | River Flood Warning | RNK | 15 hr |
| Sep 27, 4:27 PM EDT | Tornado Warning | RNK | 33 min |
| Sep 27, 5:16 PM EDT | Areal Flood Warning | RNK | 14 hr |
| Sep 29, 10:58 AM EDT | Flood Watch | RNK | 17 hr |
| Sep 30, 3:59 AM EDT | Flood Watch | RNK | 23 hr |
| Sep 30, 10:44 PM EDT | Flash Flood Warning | RNK | 5 hr |
| Oct 1, 3:21 AM EDT | Areal Flood Advisory | RNK | 84 min |
| Oct 16, 10:56 AM EDT | Frost Advisory | RNK | 22 hr |
| Oct 17, 1:28 PM EDT | Frost Advisory | RNK | 20 hr |
| Oct 27, 3:03 AM EDT | Frost Advisory | RNK | 30 hr |
| Nov 20, 3:04 AM EST | Wind Advisory | RNK | 25 hr |
| Nov 21, 2:32 PM EST | Wind Advisory | RNK | 39 hr |
| Dec 4, 2:12 AM EST | Wind Advisory | RNK | 38 hr |
| Dec 10, 2:57 AM EST | Dense Fog Advisory | RNK | 81 min |
| Dec 10, 4:18 AM EST | Dense Fog Advisory | RNK | 6 hr |
| Dec 11, 3:38 AM EST | Wind Advisory | RNK | 21 hr |
| Dec 14, 4:49 AM EST | Winter Weather Advisory | RNK | 38 hr |
| Dec 16, 8:21 PM EST | Dense Fog Advisory | RNK | 12 hr |
| Dec 29, 11:07 AM EST | Special Weather Statement | RNK | 83 min |
| Dec 29, 6:06 PM EST | Special Weather Statement | RNK | 24 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 | 15 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 7 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 3 |
| River Flood Warning | 3 |
| Flood Watch | 7 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Frost Advisory | 3 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 13 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.