Alert archive / North Carolina / Graham County
Weather alerts in Graham County, North Carolina, 2017
78 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Graham County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 78
- Warnings
- 9
- Watches
- 9
- Advisories
- 25
- Busiest month
- May15 alerts
- Busiest day
- May 24, 20178 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Graham County, 2017
| 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% | 23 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Greenville-Spartanburg, SC: tornado warnings | 35 | 12 | 66% | 46 | 93% | 19 min |
| NWS Greenville-Spartanburg, SC: severe thunderstorm warnings | 286 | 227 | 21% | 736 | 76% | 20 min |
| NWS Greenville-Spartanburg, SC: flash flood warnings | 23 | 14 | 39% | 50 | 64% | 48 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 5, 3:15 PM EST | Winter Storm Warning | GSP | 46 hr |
| Jan 7, 3:42 AM EST | Wind Chill Advisory | GSP | 32 hr |
| Jan 7, 3:04 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 8, 2:55 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 9, 2:48 PM EST | Winter Weather Advisory | GSP | 21 hr |
| Jan 23, 3:48 AM EST | Wind Advisory | GSP | 32 hr |
| Feb 7, 3:53 PM EST | Special Weather Statement | GSP | 52 min |
| Feb 8, 4:47 PM EST | Special Weather Statement | GSP | 43 min |
| Feb 8, 8:04 PM EST | Mesoscale Discussion | SPC | 86 min |
| Feb 8, 9:49 PM EST | Special Weather Statement | GSP | 41 min |
| Feb 8, 9:55 PM EST | Mesoscale Discussion | SPC | 65 min |
| Feb 12, 3:51 AM EST | Wind Advisory | GSP | 33 hr |
| Mar 1, 3:02 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 1, 4:17 PM EST | Severe Thunderstorm Warning | GSP | 43 min |
| Mar 10, 3:53 AM EST | Wind Advisory | GSP | 17 hr |
| Mar 10, 3:55 AM EST | Winter Storm Watch | GSP | 12 hr |
| Mar 10, 3:33 PM EST | Winter Storm Warning | GSP | 36 hr |
| Mar 10, 3:33 PM EST | Winter Weather Advisory | GSP | 42 hr |
| Mar 13, 4:14 AM EDT | Winter Weather Advisory | GSP | 52 hr |
| Mar 21, 3:33 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 21, 8:09 PM EDT | Severe Thunderstorm Warning | GSP | 66 min |
| Apr 5, 3:31 PM EDT | Wind Advisory | GSP | 52 hr |
| Apr 5, 7:57 PM EDT | Mesoscale Discussion | SPC | 48 min |
| Apr 6, 4:12 AM EDT | Winter Weather Advisory | GSP | 30 hr |
| Apr 21, 2:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 22, 2:57 PM EDT | Flood Watch | GSP | 61 hr |
| May 1, 2:48 PM EDT | Wind Advisory | GSP | 24 hr |
| May 3, 3:26 AM EDT | Wind Advisory | GSP | 43 hr |
| May 12, 2:06 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 12, 3:22 PM EDT | Special Weather Statement | GSP | 23 min |
| May 24, 4:23 AM EDT | Flash Flood Watch | GSP | 18 hr |
| May 24, 7:41 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 24, 10:04 AM EDT | Tornado Watch | SPC | 11 hr |
| May 24, 11:04 AM EDT | Special Weather Statement | GSP | 71 min |
| May 24, 11:10 AM EDT | Severe Thunderstorm Warning | GSP | 47 min |
| May 24, 12:18 PM EDT | Special Weather Statement | GSP | 42 min |
| May 24, 3:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| May 24, 3:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 27, 6:55 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 27, 10:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 27, 10:55 PM EDT | Severe Thunderstorm Warning | GSP | 50 min |
| Jun 12, 5:13 PM EDT | Special Weather Statement | GSP | 32 min |
| Jun 14, 1:17 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 5:33 PM EDT | Special Weather Statement | GSP | 27 min |
| Jun 15, 3:06 PM EDT | Special Weather Statement | GSP | 39 min |
| Jun 15, 3:48 PM EDT | Special Weather Statement | GSP | 42 min |
| Jul 1, 1:18 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 6, 1:15 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jul 7, 4:24 AM EDT | Special Weather Statement | GSP | 51 min |
| Jul 8, 2:23 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 8, 3:17 PM EDT | Special Weather Statement | GSP | 28 min |
| Jul 23, 11:36 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 1:21 AM EDT | Special Weather Statement | GSP | 24 min |
| Jul 27, 4:27 PM EDT | Special Weather Statement | GSP | 33 min |
| Sep 1, 9:11 AM EDT | Wind Advisory | GSP | 9 hr |
| Sep 5, 3:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Sep 5, 4:44 PM EDT | Special Weather Statement | GSP | 31 min |
| Sep 5, 5:14 PM EDT | Special Weather Statement | GSP | 31 min |
| Sep 10, 3:34 PM EDT | Wind Advisory | GSP | 36 hr |
| Sep 23, 7:25 PM EDT | Special Weather Statement | GSP | 35 min |
| Oct 7, 2:57 PM EDT | Flash Flood Watch | GSP | 37 hr |
| Oct 7, 3:03 PM EDT | High Wind Watch | GSP | 13 hr |
| Oct 8, 4:28 AM EDT | High Wind Warning | GSP | 24 hr |
| Oct 15, 8:38 PM EDT | Special Weather Statement | GSP | 52 min |
| Oct 17, 3:35 AM EDT | Frost Advisory | GSP | 29 hr |
| Oct 23, 3:01 AM EDT | Wind Advisory | GSP | 11 hr |
| Oct 24, 2:48 PM EDT | Frost Advisory | GSP | 18 hr |
| Oct 25, 3:13 AM EDT | Freeze Warning | GSP | 30 hr |
| Nov 18, 3:53 AM EST | Wind Advisory | GSP | 32 hr |
| Nov 18, 9:14 PM EST | Special Weather Statement | GSP | 61 min |
| Dec 7, 4:42 PM EST | Winter Weather Advisory | GSP | 43 hr |
| Dec 7, 9:47 PM EST | Winter Storm Warning | GSP | 38 hr |
| Dec 8, 12:06 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 9, 2:45 PM EST | Winter Weather Advisory | GSP | 19 hr |
| Dec 11, 3:26 PM EST | Wind Advisory | GSP | 40 hr |
| Dec 13, 3:39 AM EST | Wind Advisory | GSP | 27 hr |
| Dec 24, 4:00 AM EST | Wind Advisory | GSP | 31 hr |
| Dec 31, 3:41 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 | 4 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 16 |
| Special Weather Statement | 19 |
| Flooding | |
| Flash Flood Watch | 2 |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 9 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 13 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.