Alert archive / North Carolina / Surry County
Weather alerts in Surry County, North Carolina, 2009
122 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Surry County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 122
- Warnings
- 32
- Watches
- 26
- Advisories
- 24
- Busiest month
- May19 alerts
- Busiest day
- August 20, 20097 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Surry County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 21 | 14 | 33% | 20 | 90% | 23 min |
| Flash flood warnings | 6 | 4 | 33% | 4 | 75% | 48 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Blacksburg, VA: tornado warnings | 19 | 1 | 95% | 9 | 11% | 4 min |
| NWS Blacksburg, VA: severe thunderstorm warnings | 264 | 144 | 45% | 348 | 82% | 26 min |
| NWS Blacksburg, VA: flash flood warnings | 108 | 53 | 51% | 135 | 81% | 100 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, 9:32 AM EST | Winter Weather Advisory | RNK | 2 hr |
| Jan 6, 3:30 AM EST | Flood Watch | RNK | 43 hr |
| Jan 7, 4:19 AM EST | Wind Advisory | RNK | 23 hr |
| Jan 15, 4:19 AM EST | Wind Chill Advisory | RNK | 33 hr |
| Jan 27, 3:48 PM EST | Wind Advisory | RNK | 29 hr |
| Feb 10, 3:01 PM EST | High Wind Watch | RNK | 14 hr |
| Feb 11, 4:40 AM EST | High Wind Warning | RNK | 35 hr |
| Feb 11, 4:40 AM EST | Wind Advisory | RNK | 43 hr |
| Feb 11, 3:04 PM EST | Fire Weather Watch | RNK | 15 hr |
| Feb 11, 5:47 PM EST | Severe Thunderstorm Warning | RNK | 240 days |
| Feb 11, 5:53 PM EST | Severe Thunderstorm Watch | SPC | 4 hr |
| Feb 12, 5:43 AM EST | Red Flag Warning | RNK | 15 hr |
| Feb 15, 3:53 PM EST | Winter Weather Advisory | RNK | 9 hr |
| Feb 28, 5:24 AM EST | Winter Storm Watch | RNK | 23 hr |
| Mar 1, 4:39 AM EST | Winter Storm Warning | RNK | 28 hr |
| Mar 1, 1:16 PM EST | Mesoscale Discussion | SPC | 3 hr |
| Mar 27, 4:12 AM EDT | Dense Fog Advisory | RNK | 6 hr |
| Mar 29, 4:10 AM EDT | Wind Advisory | RNK | 29 hr |
| Apr 2, 4:17 AM EDT | Dense Fog Advisory | RNK | 5 hr |
| Apr 2, 9:54 PM EDT | High Wind Watch | RNK | 6 hr |
| Apr 3, 3:57 AM EDT | Wind Advisory | RNK | 32 hr |
| Apr 7, 3:49 AM EDT | Freeze Watch | RNK | 12 hr |
| Apr 7, 3:30 PM EDT | Freeze Warning | RNK | 17 hr |
| Apr 10, 4:42 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 16, 2:42 PM EDT | Frost Advisory | RNK | 17 hr |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 29, 5:27 PM EDT | Severe Thunderstorm Warning | RNK | 78 min |
| Apr 29, 7:33 PM EDT | Special Weather Statement | RNK | 42 min |
| Apr 29, 8:23 PM EDT | Special Weather Statement | RNK | 67 min |
| Apr 29, 9:18 PM EDT | Special Weather Statement | RNK | 57 min |
| Apr 29, 9:34 PM EDT | Flash Flood Warning | RNK | 5 hr |
| May 3, 7:25 PM EDT | Special Weather Statement | RNK | 50 min |
| May 3, 10:43 PM EDT | Flood Watch | RNK | 13 hr |
| May 4, 4:24 PM EDT | Severe Thunderstorm Warning | RNK | 66 min |
| May 6, 1:07 PM EDT | Special Weather Statement | RNK | 53 min |
| May 8, 3:51 PM EDT | Flood Watch | RNK | 26 hr |
| May 8, 6:32 PM EDT | Tornado Watch | SPC | 7 hr |
| May 8, 8:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 8, 11:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| May 8, 11:41 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| May 9, 12:47 PM EDT | Mesoscale Discussion | SPC | 118 min |
| May 9, 1:17 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 26, 12:07 PM EDT | Flash Flood Watch | RNK | 20 hr |
| May 26, 9:22 PM EDT | Special Weather Statement | RNK | 53 min |
| May 27, 1:16 PM EDT | Flash Flood Watch | RNK | 11 hr |
| May 28, 3:42 AM EDT | Flash Flood Watch | RNK | 26 hr |
| May 28, 1:51 PM EDT | Special Weather Statement | RNK | 54 min |
| May 29, 2:19 PM EDT | Special Weather Statement | RNK | 41 min |
| May 31, 6:16 AM EDT | Severe Thunderstorm Warning | RNK | 44 min |
| May 31, 6:56 AM EDT | Severe Thunderstorm Warning | RNK | 23 min |
| Jun 3, 12:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 3, 1:51 PM EDT | Flash Flood Watch | RNK | 15 hr |
| Jun 3, 1:51 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Jun 3, 3:11 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jun 3, 3:44 PM EDT | Severe Thunderstorm Warning | RNK | 61 min |
| Jun 4, 4:48 AM EDT | Flood Watch | RNK | 31 hr |
| Jun 9, 2:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 5:18 PM EDT | Severe Thunderstorm Warning | RNK | 72 min |
| Jun 10, 6:29 PM EDT | Special Weather Statement | RNK | 61 min |
| Jun 11, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 5:13 PM EDT | Severe Thunderstorm Warning | RNK | 77 min |
| Jun 11, 6:34 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Jun 13, 7:24 PM EDT | Special Weather Statement | RNK | 66 min |
| Jun 15, 11:44 PM EDT | Flash Flood Watch | RNK | 9 hr |
| Jun 16, 4:31 AM EDT | Flash Flood Warning | RNK | 6 hr |
| Jun 16, 8:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 16, 9:08 PM EDT | Severe Thunderstorm Warning | RNK | 49 min |
| Jun 17, 3:17 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 18, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 2:51 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Jul 11, 3:06 PM EDT | Special Weather Statement | RNK | 54 min |
| Jul 20, 6:00 AM EDT | Special Weather Statement | RNK | 60 min |
| Jul 20, 9:04 AM EDT | Special Weather Statement | RNK | 56 min |
| Jul 20, 9:27 AM EDT | Flash Flood Watch | RNK | 12 hr |
| Jul 20, 10:45 AM EDT | Flash Flood Warning | RNK | 6 hr |
| Jul 22, 10:36 PM EDT | Severe Thunderstorm Warning | RNK | 54 min |
| Jul 27, 3:29 PM EDT | Special Weather Statement | RNK | 46 min |
| Jul 30, 4:00 PM EDT | Special Weather Statement | RNK | 60 min |
| Jul 30, 4:19 PM EDT | Special Weather Statement | RNK | 56 min |
| Aug 1, 10:07 PM EDT | Flash Flood Warning | RNK | 4 hr |
| Aug 2, 12:40 AM EDT | Flash Flood Watch | RNK | 15 hr |
| Aug 5, 4:04 PM EDT | Severe Thunderstorm Warning | RNK | 56 min |
| Aug 5, 4:53 PM EDT | Severe Thunderstorm Warning | RNK | 67 min |
| Aug 10, 4:39 PM EDT | Special Weather Statement | RNK | 36 min |
| Aug 11, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 11, 2:33 PM EDT | Special Weather Statement | RNK | 27 min |
| Aug 11, 3:01 PM EDT | Severe Thunderstorm Warning | RNK | 74 min |
| Aug 19, 9:09 PM EDT | Special Weather Statement | RNK | 51 min |
| Aug 20, 3:00 PM EDT | Special Weather Statement | RNK | 60 min |
| Aug 20, 3:41 PM EDT | Severe Thunderstorm Warning | RNK | 41 min |
| Aug 20, 4:33 PM EDT | Special Weather Statement | RNK | 57 min |
| Aug 20, 5:38 PM EDT | Special Weather Statement | RNK | 67 min |
| Aug 20, 6:44 PM EDT | Special Weather Statement | RNK | 61 min |
| Aug 20, 7:11 PM EDT | Severe Thunderstorm Warning | RNK | 64 min |
| Aug 20, 8:20 PM EDT | Flash Flood Warning | RNK | 6 hr |
| Aug 23, 8:40 PM EDT | Special Weather Statement | RNK | 65 min |
| Sep 8, 6:55 PM EDT | Special Weather Statement | RNK | 65 min |
| Sep 8, 7:12 PM EDT | Flash Flood Warning | RNK | 119 min |
| Sep 19, 1:25 AM EDT | Dense Fog Advisory | RNK | 8 hr |
| Sep 25, 3:45 PM EDT | Flash Flood Watch | RNK | 31 hr |
| Oct 6, 9:53 PM EDT | Wind Advisory | RNK | 18 hr |
| Oct 18, 10:25 AM EDT | Frost Advisory | RNK | 24 hr |
| Oct 19, 3:27 AM EDT | Frost Advisory | RNK | 31 hr |
| Nov 3, 1:44 PM EST | Frost Advisory | RNK | 17 hr |
| Nov 10, 2:46 PM EST | Flood Watch | RNK | 45 hr |
| Nov 11, 4:10 AM EST | Wind Advisory | RNK | 50 hr |
| Nov 11, 2:20 PM EST | Areal Flood Advisory | RNK | 6 hr |
| Nov 26, 1:34 AM EST | Dense Fog Advisory | RNK | 7 hr |
| Dec 1, 2:58 PM EST | Wind Advisory | RNK | 45 hr |
| Dec 8, 5:11 AM EST | Wind Advisory | RNK | 64 hr |
| Dec 12, 4:41 AM EST | Winter Weather Advisory | RNK | 31 hr |
| Dec 13, 8:05 PM EST | Dense Fog Advisory | RNK | 13 hr |
| Dec 17, 4:30 AM EST | Winter Storm Watch | RNK | 11 hr |
| Dec 17, 3:20 PM EST | Winter Storm Warning | RNK | 60 hr |
| Dec 18, 1:32 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 18, 7:22 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 23, 3:49 PM EST | Winter Storm Watch | RNK | 24 hr |
| Dec 24, 4:04 AM EST | Ice Storm Warning | RNK | 35 hr |
| Dec 24, 11:11 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 25, 6:31 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 25, 10:29 AM EST | Flood Watch | RNK | 6 hr |
| Dec 30, 3:22 PM EST | Winter Weather Advisory | RNK | 21 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.