Alert archive / North Carolina / Rowan County
Weather alerts in Rowan County, North Carolina, 2009
128 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Rowan County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 128
- Warnings
- 38
- Watches
- 18
- Advisories
- 51
- Busiest month
- June23 alerts
- Busiest day
- June 11, 20098 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 Rowan County in 2009 had a tornado report inside them.
Rowan County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 25 | 14 | 44% | 11 | 100% | 28 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 33 | 8 | 76% | 15 | 93% | 21 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 394 | 237 | 40% | 457 | 86% | 26 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 55 | 40 | 27% | 103 | 73% | 94 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, 8:01 AM EST | Winter Weather Advisory | GSP | 3 hr |
| Jan 2, 8:53 PM EST | Dense Fog Advisory | GSP | 15 hr |
| Jan 7, 5:14 AM EST | Wind Advisory | GSP | 19 hr |
| Jan 8, 4:33 AM EST | Lake Wind Advisory | GSP | 22 hr |
| Jan 15, 2:31 AM EST | Wind Chill Advisory | GSP | 33 hr |
| Jan 18, 2:56 PM EST | Winter Storm Warning | GSP | 60 hr |
| Jan 19, 4:52 AM EST | Winter Storm Watch | GSP | 10 hr |
| Jan 19, 7:34 AM EST | Dense Fog Advisory | GSP | 2 hr |
| Jan 28, 3:57 AM EST | Lake Wind Advisory | GSP | 14 hr |
| Jan 28, 8:00 AM EST | Dense Fog Advisory | GSP | 3 hr |
| Feb 3, 3:31 AM EST | Winter Weather Advisory | GSP | 35 hr |
| Feb 11, 3:22 AM EST | Lake Wind Advisory | GSP | 7 hr |
| Feb 11, 3:22 AM EST | Wind Advisory | GSP | 19 hr |
| Feb 11, 12:17 PM EST | Fire Weather Watch | GSP | 18 hr |
| Feb 11, 10:21 PM EST | Lake Wind Advisory | GSP | 2 hr |
| Feb 12, 6:00 AM EST | Red Flag Warning | GSP | 15 hr |
| Feb 18, 3:10 PM EST | Lake Wind Advisory | GSP | 26 hr |
| Feb 19, 4:34 AM EST | Dense Fog Advisory | GSP | 2 hr |
| Feb 28, 4:12 AM EST | Winter Storm Watch | GSP | 25 hr |
| Mar 1, 5:18 AM EST | Winter Storm Warning | GSP | 23 hr |
| Mar 2, 2:45 PM EST | Winter Weather Advisory | GSP | 18 hr |
| Mar 16, 3:16 PM EDT | Dense Fog Advisory | GSP | 18 hr |
| Mar 18, 5:13 AM EDT | Dense Fog Advisory | GSP | 6 hr |
| Mar 20, 3:17 AM EDT | Freeze Warning | GSP | 30 hr |
| Mar 21, 3:36 AM EDT | Frost Advisory | GSP | 29 hr |
| Mar 21, 10:49 PM EDT | Freeze Warning | GSP | 10 hr |
| Mar 26, 3:40 AM EDT | Dense Fog Advisory | GSP | 11 hr |
| Mar 27, 4:41 AM EDT | Dense Fog Advisory | GSP | 6 hr |
| Mar 29, 4:55 AM EDT | Wind Advisory | GSP | 17 hr |
| Mar 29, 8:07 PM EDT | Lake Wind Advisory | GSP | 2 hr |
| Apr 2, 3:06 PM EDT | Lake Wind Advisory | GSP | 27 hr |
| Apr 2, 3:06 PM EDT | Wind Advisory | GSP | 27 hr |
| Apr 3, 4:47 AM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 6, 4:17 AM EDT | Freeze Watch | GSP | 23 hr |
| Apr 6, 4:17 AM EDT | Lake Wind Advisory | GSP | 16 hr |
| Apr 7, 3:31 AM EDT | Freeze Warning | GSP | 29 hr |
| Apr 8, 3:18 AM EDT | Lake Wind Advisory | GSP | 15 hr |
| Apr 10, 4:11 PM EDT | Severe Thunderstorm Warning | GSP | 15 min |
| Apr 10, 4:39 PM EDT | Severe Thunderstorm Warning | GSP | 36 min |
| Apr 10, 5:46 PM EDT | Severe Thunderstorm Warning | GSP | 14 min |
| Apr 16, 4:03 AM EDT | Frost Advisory | GSP | 28 hr |
| Apr 21, 3:41 AM EDT | Lake Wind Advisory | GSP | 16 hr |
| Apr 21, 1:45 PM EDT | Severe Thunderstorm Warning | GSP | 60 min |
| Apr 21, 2:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 10:01 AM EDT | Lake Wind Advisory | GSP | 8 hr |
| Apr 22, 10:16 AM EDT | Red Flag Warning | GSP | 10 hr |
| May 5, 7:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| May 6, 11:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 6, 2:16 PM EDT | Tornado Watch | SPC | 6 hr |
| May 6, 5:34 PM EDT | Severe Thunderstorm Warning | GSP | 10 min |
| May 6, 5:36 PM EDT | Tornado Warning | GSP | 39 min |
| May 6, 6:06 PM EDT | Tornado Warning | GSP | 25 min |
| May 6, 7:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 7, 3:03 PM EDT | Mesoscale Discussion | SPC | 117 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 9, 4:05 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| May 9, 4:22 PM EDT | Severe Thunderstorm Warning | GSP | 68 min |
| May 9, 4:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 12, 4:58 AM EDT | Dense Fog Advisory | GSP | 5 hr |
| May 28, 3:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 28, 5:42 PM EDT | Severe Thunderstorm Warning | GSP | 63 min |
| May 31, 2:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jun 4, 4:25 AM EDT | Flash Flood Watch | GSP | 32 hr |
| Jun 5, 10:16 AM EDT | Areal Flood Advisory | GSP | 119 min |
| Jun 9, 2:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 9, 7:49 PM EDT | Severe Thunderstorm Warning | GSP | 56 min |
| Jun 11, 3:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 11, 3:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 11, 4:35 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| Jun 11, 5:23 PM EDT | Severe Thunderstorm Warning | GSP | 52 min |
| Jun 11, 5:40 PM EDT | Areal Flood Advisory | GSP | 50 min |
| Jun 11, 5:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 11, 6:07 PM EDT | Severe Thunderstorm Warning | GSP | 68 min |
| Jun 11, 7:11 PM EDT | Severe Thunderstorm Warning | GSP | 49 min |
| Jun 12, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 13, 10:05 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| Jun 13, 11:18 PM EDT | Areal Flood Advisory | GSP | 117 min |
| Jun 15, 1:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Jun 15, 11:49 PM EDT | Flash Flood Watch | GSP | 9 hr |
| Jun 16, 5:52 AM EDT | Severe Thunderstorm Warning | GSP | 53 min |
| Jun 16, 5:57 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 3:17 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 17, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 27, 2:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 20, 5:52 PM EDT | Severe Thunderstorm Warning | GSP | 53 min |
| Jul 20, 6:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 22, 8:46 PM EDT | Severe Thunderstorm Warning | GSP | 59 min |
| Jul 22, 9:16 PM EDT | Areal Flood Advisory | GSP | 36 min |
| Jul 22, 9:42 PM EDT | Severe Thunderstorm Warning | GSP | 63 min |
| Jul 22, 9:50 PM EDT | Flash Flood Warning | GSP | 3 hr |
| Jul 27, 1:50 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| Jul 28, 8:35 PM EDT | Severe Thunderstorm Warning | GSP | 55 min |
| Aug 5, 5:43 PM EDT | Severe Thunderstorm Warning | GSP | 62 min |
| Aug 5, 6:43 PM EDT | Severe Thunderstorm Warning | GSP | 51 min |
| Aug 11, 1:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 11, 3:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 22, 6:03 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Aug 24, 4:34 AM EDT | Areal Flood Advisory | GSP | 56 min |
| Aug 24, 4:41 AM EDT | Severe Thunderstorm Warning | GSP | 43 min |
| Sep 19, 1:20 AM EDT | Dense Fog Advisory | GSP | 8 hr |
| Sep 28, 4:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Sep 28, 5:17 PM EDT | Severe Thunderstorm Warning | GSP | 45 min |
| Oct 18, 4:14 AM EDT | Frost Advisory | GSP | 29 hr |
| Oct 19, 3:17 AM EDT | Frost Advisory | GSP | 30 hr |
| Nov 6, 3:22 AM EST | Frost Advisory | GSP | 30 hr |
| Nov 6, 2:38 PM EST | Freeze Warning | GSP | 18 hr |
| Nov 9, 2:26 AM EST | Flash Flood Watch | GSP | 3 days |
| Nov 10, 3:39 PM EST | Areal Flood Advisory | GSP | 8 hr |
| Nov 11, 3:27 AM EST | Wind Advisory | GSP | 51 hr |
| Nov 11, 3:52 AM EST | Areal Flood Advisory | GSP | 6 hr |
| Nov 19, 4:53 AM EST | Dense Fog Advisory | GSP | 5 hr |
| Nov 19, 9:09 PM EST | Dense Fog Advisory | GSP | 9 hr |
| Nov 26, 12:41 AM EST | Dense Fog Advisory | GSP | 9 hr |
| Nov 26, 6:03 PM EST | Severe Thunderstorm Warning | GSP | 28 min |
| Dec 1, 2:54 PM EST | Flash Flood Watch | GSP | 31 hr |
| Dec 8, 2:31 PM EST | High Wind Watch | GSP | 14 hr |
| Dec 8, 2:31 PM EST | High Wind Warning | GSP | 28 hr |
| Dec 13, 7:18 PM EST | Dense Fog Advisory | GSP | 17 hr |
| Dec 15, 8:06 AM EST | Dense Fog Advisory | GSP | 4 hr |
| Dec 16, 5:07 PM EST | Winter Storm Watch | GSP | 24 hr |
| Dec 17, 3:53 PM EST | Winter Storm Warning | GSP | 3 days |
| Dec 24, 2:44 PM EST | Lake Wind Advisory | GSP | 21 hr |
| Dec 25, 10:08 AM EST | Flash Flood Watch | GSP | 6 hr |
| Dec 25, 10:43 AM EST | Areal Flood Advisory | GSP | 4 hr |
| Dec 25, 9:43 PM EST | Dense Fog Advisory | GSP | 9 hr |
| Dec 30, 2:48 PM EST | Winter Weather Advisory | GSP | 18 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 | 25 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 21 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 8 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 1 |
| Frost Advisory | 5 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Lake Wind Advisory | 12 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 2 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 16 |
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.