Alert archive / Virginia / Montgomery County
Weather alerts in Montgomery County, Virginia, 2022
125 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Montgomery County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 125
- Warnings
- 20
- Watches
- 12
- Advisories
- 34
- Busiest month
- May25 alerts
- Busiest day
- June 17, 202211 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Montgomery County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 12 | 20% | 34 | 56% | 21 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 36 | 5 | 86% | 9 | 44% | 14 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 272 | 224 | 18% | 947 | 73% | 23 min |
| NWS Blacksburg, VA: flash flood warnings | 25 | 9 | 64% | 21 | 81% | 74 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 2, 4:04 AM EST | Winter Storm Warning | RNK | 32 hr |
| Jan 3, 3:44 AM EST | Special Weather Statement | RNK | 31 min |
| Jan 3, 4:43 AM EST | Areal Flood Advisory | RNK | 3 hr |
| Jan 3, 5:13 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 5, 12:54 PM EST | Winter Weather Advisory | RNK | 39 hr |
| Jan 13, 9:24 PM EST | Freezing Fog Advisory | RNK | 4 hr |
| Jan 14, 3:51 AM EST | Winter Storm Watch | RNK | 24 hr |
| Jan 14, 8:28 PM EST | Winter Storm Warning | RNK | 3 days |
| Jan 16, 4:02 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 16, 11:59 AM EST | Mesoscale Discussion | SPC | 3 hr |
| Jan 17, 4:32 AM EST | Wind Advisory | RNK | 20 hr |
| Jan 17, 5:10 PM EST | Special Weather Statement | RNK | 20 min |
| Jan 27, 2:40 PM EST | Winter Weather Advisory | RNK | 42 hr |
| Feb 12, 11:16 AM EST | Winter Weather Advisory | RNK | 29 hr |
| Feb 17, 2:51 AM EST | Wind Advisory | RNK | 26 hr |
| Feb 19, 2:50 AM EST | Wind Advisory | RNK | 15 hr |
| Feb 24, 9:31 PM EST | Dense Fog Advisory | RNK | 12 hr |
| Mar 7, 3:38 AM EST | Wind Advisory | RNK | 17 hr |
| Mar 7, 3:28 PM EST | Special Weather Statement | RNK | 32 min |
| Mar 7, 4:41 PM EST | Special Weather Statement | RNK | 34 min |
| Mar 11, 1:54 PM EST | Wind Advisory | RNK | 35 hr |
| Mar 12, 7:10 PM EST | Wind Chill Advisory | RNK | 13 hr |
| Mar 25, 5:55 PM EDT | Wind Advisory | RNK | 30 hr |
| Mar 26, 4:54 AM EDT | Special Weather Statement | RNK | 21 min |
| Mar 31, 8:53 AM EDT | Special Weather Statement | RNK | 22 min |
| Mar 31, 5:23 PM EDT | Special Weather Statement | RNK | 22 min |
| Apr 1, 5:43 AM EDT | Wind Advisory | RNK | 12 hr |
| May 1, 6:00 AM EDT | Dense Fog Advisory | RNK | 4 hr |
| May 3, 2:07 PM EDT | Special Weather Statement | RNK | 23 min |
| May 3, 2:32 PM EDT | Special Weather Statement | RNK | 28 min |
| May 3, 4:53 PM EDT | Special Weather Statement | RNK | 37 min |
| May 3, 5:02 PM EDT | Severe Thunderstorm Warning | RNK | 20 min |
| May 3, 8:22 PM EDT | Special Weather Statement | RNK | 23 min |
| May 6, 2:32 PM EDT | Tornado Watch | SPC | 9 hr |
| May 6, 7:15 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| May 6, 8:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| May 8, 1:58 PM EDT | Frost Advisory | RNK | 18 hr |
| May 14, 3:54 PM EDT | Special Weather Statement | RNK | 36 min |
| May 15, 2:35 AM EDT | Dense Fog Advisory | RNK | 6 hr |
| May 15, 5:07 PM EDT | Special Weather Statement | RNK | 23 min |
| May 16, 12:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 19, 8:21 PM EDT | Special Weather Statement | RNK | 24 min |
| May 21, 8:06 PM EDT | Areal Flood Advisory | RNK | 3 hr |
| May 22, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 3:20 PM EDT | Special Weather Statement | RNK | 25 min |
| May 23, 7:17 PM EDT | Flood Watch | RNK | 13 hr |
| May 23, 10:28 PM EDT | Areal Flood Advisory | RNK | 6 hr |
| May 26, 8:11 PM EDT | Severe Thunderstorm Warning | RNK | 79 min |
| May 26, 9:49 PM EDT | Special Weather Statement | RNK | 86 min |
| May 27, 3:01 PM EDT | Special Weather Statement | RNK | 29 min |
| May 27, 3:32 PM EDT | Special Weather Statement | RNK | 28 min |
| May 27, 3:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 2, 1:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 2, 1:53 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 2:07 PM EDT | Special Weather Statement | RNK | 23 min |
| Jun 2, 7:38 PM EDT | Special Weather Statement | RNK | 37 min |
| Jun 13, 11:14 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jun 13, 11:41 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Jun 14, 8:54 AM EDT | Special Weather Statement | RNK | 36 min |
| Jun 14, 2:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 1:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 8:27 PM EDT | Special Weather Statement | RNK | 33 min |
| Jun 16, 9:22 PM EDT | Severe Thunderstorm Warning | RNK | 53 min |
| Jun 16, 10:01 PM EDT | Areal Flood Advisory | RNK | 4 hr |
| Jun 17, 12:04 AM EDT | Severe Thunderstorm Warning | RNK | 41 min |
| Jun 17, 1:00 AM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jun 17, 1:59 AM EDT | Severe Thunderstorm Warning | RNK | 47 min |
| Jun 17, 2:04 AM EDT | Flash Flood Warning | RNK | 3 hr |
| Jun 17, 12:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 17, 1:02 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 17, 3:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 17, 4:00 PM EDT | Severe Thunderstorm Warning | RNK | 60 min |
| Jun 25, 5:25 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 2, 1:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 1:15 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 6:09 PM EDT | Special Weather Statement | RNK | 51 min |
| Jul 8, 6:57 PM EDT | Special Weather Statement | RNK | 48 min |
| Jul 12, 5:44 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 12, 7:29 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jul 17, 1:44 PM EDT | Severe Thunderstorm Warning | RNK | 46 min |
| Jul 17, 2:24 PM EDT | Special Weather Statement | RNK | 51 min |
| Jul 18, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 6:00 PM EDT | Special Weather Statement | RNK | 30 min |
| Jul 25, 12:40 PM EDT | Special Weather Statement | RNK | 35 min |
| Jul 25, 12:55 PM EDT | Severe Thunderstorm Warning | RNK | 65 min |
| Jul 25, 1:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 25, 1:41 PM EDT | Severe Thunderstorm Warning | RNK | 49 min |
| Jul 26, 10:29 AM EDT | Flood Watch | RNK | 14 hr |
| Jul 26, 1:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jul 26, 2:47 PM EDT | Special Weather Statement | RNK | 13 min |
| Jul 27, 1:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 5, 1:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 6, 1:28 PM EDT | Severe Thunderstorm Warning | RNK | 32 min |
| Aug 7, 6:08 AM EDT | Dense Fog Advisory | RNK | 3 hr |
| Aug 8, 1:56 PM EDT | Special Weather Statement | RNK | 34 min |
| Aug 10, 3:05 AM EDT | Flood Watch | RNK | 21 hr |
| Aug 21, 10:55 PM EDT | Areal Flood Advisory | RNK | 98 min |
| Aug 26, 5:08 PM EDT | Special Weather Statement | RNK | 22 min |
| Aug 26, 5:35 PM EDT | Special Weather Statement | RNK | 25 min |
| Aug 26, 6:37 PM EDT | Special Weather Statement | RNK | 38 min |
| Aug 26, 7:08 PM EDT | Areal Flood Advisory | RNK | 112 min |
| Aug 27, 7:50 AM EDT | Dense Fog Advisory | RNK | 2 hr |
| Aug 30, 1:55 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 5, 4:14 AM EDT | Flood Watch | RNK | 16 hr |
| Sep 11, 4:41 PM EDT | Special Weather Statement | RNK | 34 min |
| Sep 12, 2:05 AM EDT | Dense Fog Advisory | RNK | 7 hr |
| Sep 25, 12:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 25, 1:16 PM EDT | Special Weather Statement | RNK | 29 min |
| Sep 25, 1:59 PM EDT | Special Weather Statement | RNK | 31 min |
| Sep 30, 3:20 AM EDT | Wind Advisory | RNK | 31 hr |
| Sep 30, 3:24 AM EDT | Flood Watch | RNK | 35 hr |
| Oct 7, 11:57 AM EDT | Freeze Watch | RNK | 15 hr |
| Oct 8, 3:13 AM EDT | Freeze Warning | RNK | 30 hr |
| Oct 9, 1:47 PM EDT | Frost Advisory | RNK | 19 hr |
| Oct 16, 6:45 PM EDT | Special Weather Statement | RNK | 45 min |
| Nov 1, 4:10 AM EDT | Dense Fog Advisory | RNK | 6 hr |
| Nov 11, 3:41 AM EST | Special Weather Statement | RNK | 64 min |
| Nov 14, 2:27 PM EST | Winter Weather Advisory | RNK | 27 hr |
| Nov 19, 1:59 PM EST | Wind Advisory | RNK | 20 hr |
| Dec 14, 2:46 AM EST | Winter Weather Advisory | RNK | 34 hr |
| Dec 21, 3:38 AM EST | Winter Weather Advisory | RNK | 32 hr |
| Dec 21, 1:38 PM EST | Wind Chill Watch | RNK | 21 hr |
| Dec 22, 3:55 AM EST | Wind Advisory | RNK | 39 hr |
| Dec 22, 10:18 AM EST | Wind Chill Warning | RNK | 70 hr |
| Dec 22, 10:18 AM EST | Wind Chill Advisory | RNK | 3 days |
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 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 38 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 5 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 6 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Freeze Watch | 1 |
| Wind Chill Watch | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Freezing Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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.