Alert archive / North Carolina / Clay County
Weather alerts in Clay County, North Carolina, 2020
91 weather alerts in 2020, 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 2020. Tap one for its archive.
- Alerts
- 91
- Warnings
- 15
- Watches
- 18
- Advisories
- 23
- Busiest month
- April19 alerts
- Busiest day
- April 13, 20206 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clay County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 4 | 3 | 25% | 2 | 100% | 14 min |
| Flash flood warnings | 2 | 1 | 50% | 1 | 100% | 64 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Morristown, TN: tornado warnings | 13 | 5 | 62% | 6 | 83% | 6 min |
| NWS Morristown, TN: severe thunderstorm warnings | 158 | 129 | 18% | 243 | 81% | 21 min |
| NWS Morristown, TN: flash flood warnings | 22 | 18 | 18% | 33 | 82% | 42 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 10, 2:39 PM EST | Wind Advisory | MRX | 34 hr |
| Jan 11, 1:42 PM EST | Tornado Watch | SPC | 7 hr |
| Jan 11, 4:16 PM EST | Mesoscale Discussion | SPC | 89 min |
| Jan 11, 5:34 PM EST | Severe Thunderstorm Warning | MRX | 41 min |
| Feb 4, 3:46 PM EST | Flash Flood Watch | MRX | 47 hr |
| Feb 6, 3:32 AM EST | Flash Flood Warning | MRX | 4 hr |
| Feb 6, 7:30 AM EST | Areal Flood Warning | MRX | 12 hr |
| Feb 6, 7:09 PM EST | Areal Flood Warning | MRX | 14 hr |
| Feb 7, 2:57 PM EST | Winter Weather Advisory | MRX | 25 hr |
| Feb 8, 3:25 AM EST | Winter Storm Warning | MRX | 12 hr |
| Feb 9, 1:24 AM EST | Freezing Fog Advisory | MRX | 8 hr |
| Feb 9, 3:35 AM EST | Flood Watch | MRX | 36 hr |
| Feb 10, 3:14 PM EST | Flash Flood Watch | MRX | 24 hr |
| Feb 12, 3:03 AM EST | Flash Flood Watch | MRX | 31 hr |
| Feb 19, 11:44 AM EST | Winter Weather Advisory | MRX | 34 hr |
| Mar 3, 10:22 AM EST | Special Weather Statement | MRX | 23 min |
| Mar 18, 3:59 AM EDT | Dense Fog Advisory | MRX | 6 hr |
| Mar 24, 4:31 AM EDT | Flash Flood Watch | MRX | 23 hr |
| Mar 24, 11:37 PM EDT | Special Weather Statement | MRX | 38 min |
| Apr 1, 9:06 PM EDT | Frost Advisory | MRX | 12 hr |
| Apr 8, 10:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Apr 8, 11:16 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 9, 3:01 AM EDT | Special Weather Statement | MRX | 44 min |
| Apr 9, 3:13 PM EDT | Freeze Watch | MRX | 12 hr |
| Apr 10, 3:35 AM EDT | Freeze Warning | MRX | 30 hr |
| Apr 11, 9:32 PM EDT | Wind Advisory | MRX | 42 hr |
| Apr 11, 9:41 PM EDT | Flash Flood Watch | MRX | 32 hr |
| Apr 12, 8:41 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Apr 12, 8:57 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 12, 11:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 13, 12:13 AM EDT | Severe Thunderstorm Warning | MRX | 62 min |
| Apr 13, 1:28 AM EDT | Severe Thunderstorm Warning | MRX | 47 min |
| Apr 13, 1:29 AM EDT | Flash Flood Warning | MRX | 3 hr |
| Apr 15, 3:24 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 16, 3:34 PM EDT | Frost Advisory | MRX | 18 hr |
| Apr 21, 3:21 AM EDT | Frost Advisory | MRX | 31 hr |
| Apr 25, 3:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 25, 6:11 PM EDT | Tornado Watch | SPC | 4 hr |
| May 4, 7:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 5, 12:08 AM EDT | Mesoscale Discussion | SPC | 97 min |
| May 5, 12:31 AM EDT | Special Weather Statement | MRX | 59 min |
| May 5, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| May 5, 4:58 PM EDT | Special Weather Statement | MRX | 47 min |
| May 6, 3:30 PM EDT | Frost Advisory | MRX | 18 hr |
| May 7, 3:51 AM EDT | Freeze Watch | MRX | 24 hr |
| May 8, 3:56 AM EDT | Freeze Warning | MRX | 30 hr |
| May 9, 3:26 AM EDT | Freeze Warning | MRX | 31 hr |
| May 11, 2:56 AM EDT | Frost Advisory | MRX | 29 hr |
| May 24, 3:15 PM EDT | Special Weather Statement | MRX | 30 min |
| Jun 14, 2:12 PM EDT | Special Weather Statement | MRX | 48 min |
| Jun 14, 2:32 PM EDT | Special Weather Statement | MRX | 43 min |
| Jun 14, 3:02 PM EDT | Special Weather Statement | MRX | 43 min |
| Jun 14, 3:10 PM EDT | Severe Thunderstorm Warning | MRX | 50 min |
| Jun 15, 1:45 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 2:13 PM EDT | Special Weather Statement | MRX | 47 min |
| Jun 21, 6:46 PM EDT | Special Weather Statement | MRX | 59 min |
| Jun 22, 4:41 PM EDT | Special Weather Statement | MRX | 49 min |
| Jun 23, 7:30 PM EDT | Special Weather Statement | MRX | 30 min |
| Jun 29, 6:17 PM EDT | Special Weather Statement | MRX | 43 min |
| Jul 3, 10:18 PM EDT | Areal Flood Advisory | MRX | 117 min |
| Jul 4, 4:23 PM EDT | Special Weather Statement | MRX | 52 min |
| Jul 9, 2:51 PM EDT | Special Weather Statement | MRX | 24 min |
| Jul 18, 12:43 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 19, 6:14 PM EDT | Special Weather Statement | MRX | 46 min |
| Jul 20, 12:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 1:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 1:47 PM EDT | Special Weather Statement | MRX | 43 min |
| Jul 22, 3:49 PM EDT | Special Weather Statement | MRX | 26 min |
| Jul 23, 1:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 1:09 PM EDT | Special Weather Statement | MRX | 51 min |
| Jul 24, 2:06 PM EDT | Areal Flood Advisory | MRX | 3 hr |
| Aug 5, 1:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 6, 2:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 10, 2:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 23, 2:41 AM EDT | Areal Flood Advisory | MRX | 3 hr |
| Sep 15, 3:37 PM EDT | Flash Flood Watch | MRX | 47 hr |
| Oct 10, 4:37 AM EDT | Flash Flood Watch | MRX | 34 hr |
| Oct 16, 3:12 AM EDT | Frost Advisory | MRX | 31 hr |
| Oct 28, 3:52 AM EDT | Flash Flood Watch | MRX | 30 hr |
| Oct 28, 10:47 AM EDT | High Wind Watch | MRX | 5 hr |
| Oct 28, 2:58 PM EDT | Tropical Storm Warning | MRX | 24 hr |
| Oct 30, 3:18 PM EDT | Frost Advisory | MRX | 18 hr |
| Oct 30, 3:18 PM EDT | Freeze Watch | MRX | 37 hr |
| Nov 1, 3:16 AM EST | Freeze Warning | MRX | 30 hr |
| Nov 2, 2:39 PM EST | Freeze Warning | MRX | 18 hr |
| Nov 29, 3:55 PM EST | Winter Weather Advisory | MRX | 44 hr |
| Dec 6, 2:33 AM EST | Freezing Fog Advisory | MRX | 7 hr |
| Dec 13, 5:28 AM EST | Dense Fog Advisory | MRX | 4 hr |
| Dec 23, 2:14 PM EST | Winter Weather Advisory | MRX | 38 hr |
| Dec 23, 11:37 PM EST | Wind Advisory | MRX | 10 hr |
| Dec 29, 1:41 AM EST | Dense Fog Advisory | MRX | 6 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 | 4 |
| Severe Thunderstorm Watch | 2 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 15 |
| Special Weather Statement | 20 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 8 |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 5 |
| Freeze Watch | 3 |
| Frost Advisory | 8 |
| Wind and dust | |
| High Wind Watch | 1 |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
| Freezing Fog Advisory | 2 |
| Tropical | |
| Tropical Storm Warning | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.