Alert archive / Georgia / McDuffie County
Weather alerts in McDuffie County, Georgia, 2009
119 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
McDuffie County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 119
- Warnings
- 16
- Watches
- 14
- Advisories
- 57
- Busiest month
- April20 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.
1 of 1 tornado warnings covering McDuffie County in 2009 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 26 minutes after it went out.
McDuffie County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 1 | 100% | 26 min |
| Severe thunderstorm warnings | 11 | 6 | 45% | 2 | 100% | 12 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 Columbia, SC: tornado warnings | 18 | 3 | 83% | 6 | 50% | 25 min |
| NWS Columbia, SC: severe thunderstorm warnings | 194 | 105 | 46% | 188 | 88% | 25 min |
| NWS Columbia, SC: flash flood warnings | 17 | 9 | 47% | 21 | 81% | 32 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, 2:49 AM EST | Dense Fog Advisory | CAE | 7 hr |
| Jan 3, 8:17 PM EST | Dense Fog Advisory | CAE | 16 hr |
| Jan 4, 2:39 PM EST | Dense Fog Advisory | CAE | 20 hr |
| Jan 6, 3:46 AM EST | Lake Wind Advisory | CAE | 27 hr |
| Jan 7, 2:32 AM EST | Mesoscale Discussion | SPC | 118 min |
| Jan 7, 4:11 AM EST | Lake Wind Advisory | CAE | 39 hr |
| Jan 7, 4:11 AM EST | Wind Advisory | CAE | 16 hr |
| Jan 18, 9:17 PM EST | Dense Fog Advisory | CAE | 10 hr |
| Jan 19, 3:55 AM EST | Winter Weather Advisory | CAE | 32 hr |
| Jan 19, 3:44 PM EST | Lake Wind Advisory | CAE | 22 hr |
| Jan 24, 6:55 PM EST | Dense Fog Advisory | CAE | 7 hr |
| Jan 26, 7:58 PM EST | Dense Fog Advisory | CAE | 16 hr |
| Jan 27, 3:51 PM EST | Lake Wind Advisory | CAE | 28 hr |
| Jan 30, 3:03 AM EST | Lake Wind Advisory | CAE | 16 hr |
| Feb 2, 3:54 AM EST | Lake Wind Advisory | CAE | 72 hr |
| Feb 10, 3:46 PM EST | Lake Wind Advisory | CAE | 49 hr |
| Feb 11, 11:25 AM EST | Wind Advisory | CAE | 17 hr |
| Feb 11, 7:07 PM EST | Mesoscale Discussion | SPC | 53 min |
| Feb 18, 1:08 PM EST | Lake Wind Advisory | CAE | 39 hr |
| Feb 18, 3:32 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 18, 6:26 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 18, 7:24 PM EST | Tornado Warning | CAE | 66 min |
| Feb 18, 10:14 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 21, 3:12 PM EST | Lake Wind Advisory | CAE | 30 hr |
| Feb 28, 3:47 PM EST | Winter Weather Advisory | CAE | 12 hr |
| Mar 1, 3:57 AM EST | Winter Storm Warning | CAE | 22 hr |
| Mar 1, 12:19 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 1, 2:33 PM EST | Lake Wind Advisory | CAE | 114 min |
| Mar 1, 3:40 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Mar 1, 4:27 PM EST | Lake Wind Advisory | CAE | 18 hr |
| Mar 1, 9:43 PM EST | Winter Weather Advisory | CAE | 5 hr |
| Mar 16, 3:36 PM EDT | Dense Fog Advisory | CAE | 14 hr |
| Mar 21, 3:11 AM EDT | Frost Advisory | CAE | 29 hr |
| Mar 28, 2:48 PM EDT | Lake Wind Advisory | CAE | 32 hr |
| Apr 2, 4:12 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 2, 3:17 PM EDT | Lake Wind Advisory | CAE | 29 hr |
| Apr 5, 3:45 PM EDT | Lake Wind Advisory | CAE | 56 hr |
| Apr 6, 5:45 PM EDT | Freeze Watch | CAE | 10 hr |
| Apr 7, 3:15 AM EDT | Freeze Warning | CAE | 29 hr |
| Apr 10, 4:01 AM EDT | Lake Wind Advisory | CAE | 29 hr |
| Apr 10, 6:11 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Apr 10, 6:31 PM EDT | Tornado Watch | SPC | 7 hr |
| Apr 10, 7:34 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 10, 8:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 10, 9:48 PM EDT | Severe Thunderstorm Warning | CAE | 42 min |
| Apr 10, 10:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 13, 4:53 PM EDT | Wind Advisory | CAE | 2 hr |
| Apr 14, 11:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Apr 14, 1:25 PM EDT | Severe Thunderstorm Warning | CAE | 50 min |
| Apr 20, 12:20 AM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 20, 12:42 AM EDT | Tornado Watch | SPC | 5 hr |
| Apr 20, 3:36 AM EDT | Lake Wind Advisory | CAE | 19 hr |
| Apr 21, 3:18 AM EDT | Lake Wind Advisory | CAE | 19 hr |
| Apr 22, 4:16 AM EDT | Lake Wind Advisory | CAE | 16 hr |
| May 2, 2:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| May 3, 6:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 3, 7:29 PM EDT | Severe Thunderstorm Watch | SPC | 2 hr |
| May 4, 2:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 4, 2:39 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 5, 6:28 PM EDT | Severe Thunderstorm Warning | CAE | 62 min |
| May 6, 8:47 AM EDT | Mesoscale Discussion | SPC | 88 min |
| May 6, 5:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 15, 6:04 AM EDT | Dense Fog Advisory | CAE | 3 hr |
| May 17, 2:56 PM EDT | Lake Wind Advisory | CAE | 3 days |
| Jun 8, 4:46 AM EDT | Dense Fog Advisory | CAE | 4 hr |
| Jun 12, 2:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 17, 3:17 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 17, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 10:32 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 17, 10:52 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 18, 12:57 AM EDT | Severe Thunderstorm Warning | CAE | 48 min |
| Jun 18, 1:34 AM EDT | Severe Thunderstorm Warning | CAE | 41 min |
| Jun 18, 1:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 18, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 4:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 18, 6:02 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 18, 6:23 PM EDT | Severe Thunderstorm Warning | CAE | 67 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, 3:16 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 27, 4:43 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 27, 7:27 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 28, 4:07 AM EDT | Heat Advisory | CAE | 11 hr |
| Jul 5, 11:03 PM EDT | Severe Thunderstorm Warning | CAE | 42 min |
| Jul 7, 6:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jul 8, 1:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Aug 5, 1:20 PM EDT | Severe Thunderstorm Warning | CAE | 55 min |
| Aug 5, 3:54 PM EDT | Severe Thunderstorm Warning | CAE | 51 min |
| Aug 5, 4:24 PM EDT | Severe Thunderstorm Warning | CAE | 38 min |
| Aug 11, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 13, 12:11 AM EDT | Areal Flood Advisory | CAE | 109 min |
| Aug 13, 12:47 AM EDT | Flash Flood Warning | CAE | 3 hr |
| Aug 30, 1:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 28, 3:49 AM EDT | Lake Wind Advisory | CAE | 17 hr |
| Oct 13, 2:58 PM EDT | Flood Watch | CAE | 24 hr |
| Oct 18, 2:44 PM EDT | Frost Advisory | CAE | 18 hr |
| Oct 19, 4:01 AM EDT | Frost Advisory | CAE | 29 hr |
| Oct 23, 7:16 AM EDT | Dense Fog Advisory | CAE | 3 hr |
| Nov 6, 3:24 AM EST | Frost Advisory | CAE | 28 hr |
| Nov 10, 3:29 PM EST | Flood Watch | CAE | 28 hr |
| Nov 11, 3:09 AM EST | Areal Flood Advisory | CAE | 3 hr |
| Nov 11, 3:46 AM EST | Lake Wind Advisory | CAE | 43 hr |
| Nov 17, 4:22 AM EST | Dense Fog Advisory | CAE | 6 hr |
| Nov 19, 2:54 AM EST | Dense Fog Advisory | CAE | 7 hr |
| Nov 26, 12:22 AM EST | Dense Fog Advisory | CAE | 12 hr |
| Nov 26, 3:20 PM EST | Lake Wind Advisory | CAE | 25 hr |
| Nov 27, 4:00 AM EST | Freeze Warning | CAE | 29 hr |
| Dec 1, 3:22 PM EST | Lake Wind Advisory | CAE | 40 hr |
| Dec 2, 2:08 PM EST | Tornado Watch | SPC | 8 hr |
| Dec 2, 5:44 PM EST | Mesoscale Discussion | SPC | 91 min |
| Dec 8, 3:07 PM EST | Lake Wind Advisory | CAE | 12 hr |
| Dec 9, 3:21 AM EST | Wind Advisory | CAE | 15 hr |
| Dec 9, 3:55 AM EST | Dense Fog Advisory | CAE | 2 hr |
| Dec 9, 5:47 AM EST | Severe Thunderstorm Warning | CAE | 73 min |
| Dec 13, 8:52 AM EST | Dense Fog Advisory | CAE | 4 hr |
| Dec 13, 9:13 PM EST | Dense Fog Advisory | CAE | 13 hr |
| Dec 18, 3:23 AM EST | Lake Wind Advisory | CAE | 31 hr |
| Dec 24, 3:44 PM EST | Lake Wind Advisory | CAE | 24 hr |
| Dec 28, 11:28 AM EST | Lake Wind Advisory | CAE | 15 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 | 7 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 32 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 2 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| Lake Wind Advisory | 27 |
| Wind Advisory | 4 |
| 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.