Alert archive / North Carolina / Clay County
Weather alerts in Clay County, North Carolina, 2009
100 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clay County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 100
- Warnings
- 20
- Watches
- 20
- Advisories
- 27
- Busiest month
- June26 alerts
- Busiest day
- June 18, 20099 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 1 tornado warnings covering Clay County in 2009 had a tornado report inside them.
Clay County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 11 | 8 | 27% | 6 | 83% | 26 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 41 | 11 | 73% | 14 | 93% | 22 min |
| NWS Morristown, TN: severe thunderstorm warnings | 335 | 252 | 25% | 434 | 87% | 26 min |
| NWS Morristown, TN: flash flood warnings | 39 | 29 | 26% | 59 | 76% | 75 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 3, 12:43 AM EST | Dense Fog Advisory | MRX | 9 hr |
| Jan 5, 3:51 AM EST | Flood Watch | MRX | 51 hr |
| Jan 6, 5:55 PM EST | Areal Flood Warning | MRX | 16 hr |
| Jan 10, 9:39 AM EST | Wind Advisory | MRX | 12 hr |
| Jan 17, 10:37 PM EST | Freezing Rain Advisory | MRX | 11 hr |
| Feb 2, 10:38 AM EST | Winter Weather Advisory | MRX | 5 hr |
| Feb 3, 2:57 PM EST | Wind Chill Advisory | MRX | 22 hr |
| Feb 10, 11:45 AM EST | High Wind Watch | MRX | 3 hr |
| Feb 10, 2:56 PM EST | High Wind Warning | MRX | 36 hr |
| Feb 10, 2:56 PM EST | Wind Advisory | MRX | 45 hr |
| Feb 11, 1:59 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 11, 2:29 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Feb 11, 5:08 PM EST | Severe Thunderstorm Warning | MRX | 52 min |
| Feb 17, 3:45 PM EST | Wind Advisory | MRX | 26 hr |
| Feb 28, 3:07 PM EST | Winter Weather Advisory | MRX | 28 hr |
| Mar 24, 3:32 PM EDT | Wind Advisory | MRX | 44 hr |
| Apr 2, 5:02 AM EDT | Wind Advisory | MRX | 35 hr |
| Apr 2, 6:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Apr 2, 11:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Apr 2, 11:35 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 3, 12:50 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 6, 3:27 PM EDT | Freeze Watch | MRX | 12 hr |
| Apr 7, 3:54 AM EDT | Freeze Warning | MRX | 30 hr |
| Apr 10, 8:04 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 10, 12:23 PM EDT | Tornado Watch | SPC | 8 hr |
| Apr 10, 5:15 PM EDT | Tornado Warning | MRX | 60 min |
| Apr 12, 8:40 PM EDT | Wind Advisory | MRX | 18 hr |
| Apr 21, 2:17 PM EDT | Wind Advisory | MRX | 6 hr |
| Apr 25, 2:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 2, 2:54 PM EDT | Flood Watch | MRX | 44 hr |
| May 5, 3:29 PM EDT | Flood Watch | MRX | 31 hr |
| May 6, 11:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 8, 10:11 AM EDT | Severe Thunderstorm Warning | MRX | 34 min |
| May 8, 6:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 15, 1:57 PM EDT | Mesoscale Discussion | SPC | 63 min |
| May 15, 4:19 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| May 15, 5:38 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| May 18, 9:22 PM EDT | Frost Advisory | MRX | 12 hr |
| May 28, 1:28 PM EDT | Mesoscale Discussion | SPC | 62 min |
| May 28, 2:21 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 28, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 7:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Jun 10, 2:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 11, 12:18 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 11, 1:44 PM EDT | Severe Thunderstorm Warning | MRX | 46 min |
| Jun 11, 2:38 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Jun 11, 2:55 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jun 17, 12:54 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 17, 3:17 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 17, 4:07 PM EDT | Mesoscale Discussion | SPC | 23 min |
| Jun 17, 7:22 PM EDT | Mesoscale Discussion | SPC | 23 min |
| Jun 17, 8:47 PM EDT | Severe Thunderstorm Warning | MRX | 58 min |
| Jun 17, 9:49 PM EDT | Severe Thunderstorm Warning | MRX | 56 min |
| Jun 17, 10:32 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 17, 10:48 PM EDT | Severe Thunderstorm Warning | MRX | 57 min |
| Jun 18, 10:15 AM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 18, 10:39 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 1:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 18, 3:47 PM EDT | Severe Thunderstorm Warning | MRX | 41 min |
| Jun 18, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 21, 6:23 PM EDT | Severe Thunderstorm Warning | MRX | 67 min |
| Jun 22, 11:19 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Jun 22, 12:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 3:24 PM EDT | Severe Thunderstorm Warning | MRX | 66 min |
| Jun 22, 3:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 27, 2:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 27, 4:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 27, 7:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 8, 6:09 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Jul 31, 7:21 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 4, 6:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Sep 9, 12:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Sep 9, 12:39 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Sep 20, 2:28 PM EDT | Flood Watch | MRX | 37 hr |
| Sep 21, 2:15 AM EDT | Areal Flood Advisory | MRX | 8 hr |
| Sep 21, 9:03 AM EDT | Areal Flood Warning | MRX | 12 hr |
| Sep 25, 5:24 AM EDT | Flash Flood Watch | MRX | 40 hr |
| Sep 26, 12:23 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 8, 3:19 PM EDT | Wind Advisory | MRX | 30 hr |
| Oct 9, 4:27 PM EDT | Tornado Watch | SPC | 6 hr |
| Oct 9, 7:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Oct 9, 9:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Oct 17, 3:16 PM EDT | Freeze Warning | MRX | 19 hr |
| Oct 17, 8:59 PM EDT | Freeze Watch | MRX | 13 hr |
| Oct 18, 10:00 AM EDT | Freeze Warning | MRX | 23 hr |
| Oct 19, 2:50 PM EDT | Freeze Warning | MRX | 18 hr |
| Nov 10, 4:39 AM EST | Flash Flood Watch | MRX | 32 hr |
| Nov 10, 11:18 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Nov 11, 2:53 AM EST | Wind Advisory | MRX | 18 hr |
| Nov 11, 3:42 AM EST | Areal Flood Advisory | MRX | 3 hr |
| Nov 30, 3:18 PM EST | High Wind Watch | MRX | 24 hr |
| Dec 1, 5:26 PM EST | Wind Advisory | MRX | 31 hr |
| Dec 4, 3:00 PM EST | Winter Weather Advisory | MRX | 24 hr |
| Dec 5, 12:18 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 7, 3:23 PM EST | High Wind Watch | MRX | 13 hr |
| Dec 8, 3:57 AM EST | High Wind Warning | MRX | 39 hr |
| Dec 13, 9:07 PM EST | Dense Fog Advisory | MRX | 13 hr |
| Dec 17, 3:18 PM EST | Winter Weather Advisory | MRX | 37 hr |
| Dec 23, 3:39 PM EST | Wind Advisory | MRX | 48 hr |
| Dec 25, 2:37 AM EST | Areal Flood Advisory | MRX | 3 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 | 11 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 33 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Flood Watch | 4 |
| Areal Flood Advisory | 7 |
| Winter | |
| Freezing Rain Advisory | 1 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 2 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 2 |
| High Wind Watch | 3 |
| Wind Advisory | 11 |
| 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 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.