Alert archive / Georgia / Houston County
Weather alerts in Houston County, Georgia, 2009
155 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Houston County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 155
- Warnings
- 65
- Watches
- 30
- Advisories
- 27
- Busiest month
- February31 alerts
- Busiest day
- June 22, 20097 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 2 tornado warnings covering Houston County in 2009 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 6 minutes after it went out.
Houston County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 1 | 50% | 2 | 100% | 6 min |
| Severe thunderstorm warnings | 21 | 15 | 29% | 11 | 91% | 22 min |
| Flash flood warnings | 3 | 2 | 33% | 3 | 100% | 40 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Atlanta, GA: tornado warnings | 131 | 26 | 80% | 58 | 84% | 24 min |
| NWS Atlanta, GA: severe thunderstorm warnings | 468 | 174 | 63% | 500 | 64% | 24 min |
| NWS Atlanta, GA: flash flood warnings | 58 | 23 | 60% | 51 | 65% | 150 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, 5:16 AM EST | Dense Fog Advisory | FFC | 9 hr |
| Jan 6, 11:51 PM EST | Tornado Watch | SPC | 6 hr |
| Jan 7, 2:32 AM EST | Mesoscale Discussion | SPC | 118 min |
| Jan 7, 3:56 AM EST | Wind Advisory | FFC | 18 hr |
| Jan 9, 3:00 AM EST | Red Flag Warning | FFC | 15 hr |
| Jan 13, 3:42 AM EST | Red Flag Warning | FFC | 39 hr |
| Jan 14, 3:46 PM EST | Fire Weather Watch | FFC | 12 hr |
| Jan 14, 3:46 PM EST | Red Flag Warning | FFC | 26 hr |
| Jan 15, 3:57 AM EST | Red Flag Warning | FFC | 42 hr |
| Jan 15, 3:30 PM EST | Red Flag Warning | FFC | 51 hr |
| Jan 19, 3:56 PM EST | Wind Advisory | FFC | 27 hr |
| Jan 20, 2:20 PM EST | Fire Weather Watch | FFC | 25 hr |
| Jan 20, 2:20 PM EST | Red Flag Warning | FFC | 28 hr |
| Jan 21, 3:39 PM EST | Red Flag Warning | FFC | 26 hr |
| Jan 26, 7:05 PM EST | Dense Fog Advisory | FFC | 14 hr |
| Feb 3, 3:40 AM EST | Wind Advisory | FFC | 37 hr |
| Feb 3, 2:23 PM EST | Fire Weather Watch | FFC | 25 hr |
| Feb 3, 2:23 PM EST | Red Flag Warning | FFC | 29 hr |
| Feb 4, 3:17 PM EST | Red Flag Warning | FFC | 29 hr |
| Feb 5, 3:08 PM EST | Red Flag Warning | FFC | 29 hr |
| Feb 6, 4:12 AM EST | Red Flag Warning | FFC | 38 hr |
| Feb 10, 5:04 PM EST | Wind Advisory | FFC | 28 hr |
| Feb 12, 4:46 AM EST | Red Flag Warning | FFC | 13 hr |
| Feb 13, 4:12 AM EST | Red Flag Warning | FFC | 15 hr |
| Feb 18, 2:57 PM EST | Mesoscale Discussion | SPC | 93 min |
| Feb 18, 3:32 PM EST | Tornado Watch | SPC | 7 hr |
| Feb 18, 3:52 PM EST | Wind Advisory | FFC | 27 hr |
| Feb 18, 6:01 PM EST | Severe Thunderstorm Warning | FFC | 44 min |
| Feb 18, 6:19 PM EST | Tornado Warning | FFC | 26 min |
| Feb 18, 6:26 PM EST | Mesoscale Discussion | SPC | 94 min |
| Feb 18, 8:58 PM EST | Mesoscale Discussion | SPC | 92 min |
| Feb 18, 9:24 PM EST | Severe Thunderstorm Warning | FFC | 17 min |
| Feb 18, 10:14 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
| Feb 18, 11:55 PM EST | Mesoscale Discussion | SPC | 95 min |
| Feb 20, 2:03 PM EST | Red Flag Warning | FFC | 28 hr |
| Feb 21, 2:04 PM EST | Fire Weather Watch | FFC | 14 hr |
| Feb 22, 4:14 AM EST | Red Flag Warning | FFC | 15 hr |
| Feb 22, 1:41 PM EST | Fire Weather Watch | FFC | 24 hr |
| Feb 22, 1:41 PM EST | Red Flag Warning | FFC | 29 hr |
| Feb 23, 2:02 PM EST | Red Flag Warning | FFC | 29 hr |
| Feb 28, 8:25 AM EST | Tornado Watch | SPC | 3 hr |
| Feb 28, 11:05 AM EST | Severe Thunderstorm Warning | FFC | 40 min |
| Feb 28, 11:32 AM EST | Tornado Warning | FFC | 58 min |
| Feb 28, 11:39 AM EST | Tornado Watch | SPC | 7 hr |
| Feb 28, 3:20 PM EST | Wind Advisory | FFC | 31 hr |
| Feb 28, 3:41 PM EST | Winter Weather Advisory | FFC | 31 hr |
| Feb 28, 11:01 PM EST | River Flood Warning | FFC | 4 days |
| Mar 10, 4:28 AM EDT | Dense Fog Advisory | FFC | 6 hr |
| Mar 16, 3:56 PM EDT | Dense Fog Advisory | FFC | 13 hr |
| Mar 16, 8:31 PM EDT | River Flood Warning | FFC | 15 hr |
| Mar 22, 4:04 AM EDT | Red Flag Warning | FFC | 15 hr |
| Mar 28, 7:48 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Mar 28, 10:20 AM EDT | Tornado Watch | SPC | 8 hr |
| Mar 28, 10:23 AM EDT | Severe Thunderstorm Warning | FFC | 52 min |
| Mar 28, 11:01 AM EDT | Severe Thunderstorm Warning | FFC | 59 min |
| Mar 28, 11:26 AM EDT | River Flood Warning | FFC | 4 days |
| Mar 28, 1:07 PM EDT | Wind Advisory | FFC | 31 hr |
| Apr 2, 4:12 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Apr 2, 7:53 AM EDT | River Flood Warning | FFC | 70 hr |
| Apr 2, 11:06 AM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 2, 4:22 PM EDT | Wind Advisory | FFC | 24 hr |
| Apr 5, 4:15 AM EDT | Wind Advisory | FFC | 63 hr |
| Apr 5, 10:29 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Apr 6, 4:56 PM EDT | Freeze Watch | FFC | 12 hr |
| Apr 7, 4:40 AM EDT | Freeze Warning | FFC | 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, 10:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 11, 12:49 AM EDT | Mesoscale Discussion | SPC | 56 min |
| Apr 13, 9:33 AM EDT | Severe Thunderstorm Warning | FFC | 42 min |
| Apr 13, 10:16 AM EDT | Severe Thunderstorm Warning | FFC | 44 min |
| Apr 14, 2:20 AM EDT | River Flood Warning | FFC | 13 hr |
| Apr 16, 2:21 PM EDT | Fire Weather Watch | FFC | 13 hr |
| Apr 17, 4:12 PM EDT | Fire Weather Watch | FFC | 11 hr |
| Apr 21, 1:45 PM EDT | Red Flag Warning | FFC | 5 hr |
| Apr 21, 3:20 PM EDT | Fire Weather Watch | FFC | 12 hr |
| Apr 21, 7:21 PM EDT | High Wind Warning | FFC | 2 hr |
| Apr 22, 3:36 AM EDT | Red Flag Warning | FFC | 16 hr |
| Apr 24, 4:38 AM EDT | Red Flag Warning | FFC | 15 hr |
| May 2, 4:35 PM EDT | Severe Thunderstorm Warning | FFC | 40 min |
| May 3, 11:56 AM EDT | Mesoscale Discussion | SPC | 64 min |
| May 3, 4:42 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 3, 6:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 4, 2:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 6, 10:27 AM EDT | Tornado Watch | SPC | 9 hr |
| May 6, 5:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 10, 6:16 PM EDT | Severe Thunderstorm Warning | FFC | 59 min |
| May 10, 6:41 PM EDT | Severe Thunderstorm Warning | FFC | 64 min |
| May 10, 6:57 PM EDT | Severe Thunderstorm Warning | FFC | 48 min |
| May 15, 4:53 PM EDT | Severe Thunderstorm Warning | FFC | 52 min |
| May 18, 3:50 PM EDT | Wind Advisory | FFC | 28 hr |
| May 19, 3:18 AM EDT | Red Flag Warning | FFC | 16 hr |
| May 20, 3:20 AM EDT | Red Flag Warning | FFC | 15 hr |
| May 20, 3:44 AM EDT | Wind Advisory | FFC | 14 hr |
| May 20, 2:43 PM EDT | Wind Advisory | FFC | 28 hr |
| May 24, 5:28 PM EDT | Severe Thunderstorm Warning | FFC | 37 min |
| Jun 4, 11:51 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Jun 10, 6:22 PM EDT | Severe Thunderstorm Warning | FFC | 23 min |
| Jun 18, 1:39 AM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 3:45 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 6:02 PM EDT | Mesoscale Discussion | SPC | 28 min |
| Jun 18, 6:22 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 7:05 PM EDT | Severe Thunderstorm Warning | FFC | 40 min |
| Jun 19, 4:19 PM EDT | Heat Advisory | FFC | 53 hr |
| Jun 22, 3:26 PM EDT | Severe Thunderstorm Warning | FFC | 49 min |
| Jun 22, 3:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jun 22, 3:43 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 22, 4:06 PM EDT | Severe Thunderstorm Warning | FFC | 24 min |
| Jun 22, 6:09 PM EDT | Severe Thunderstorm Warning | FFC | 51 min |
| Jun 22, 6:51 PM EDT | Severe Thunderstorm Warning | FFC | 39 min |
| Jun 22, 7:25 PM EDT | Severe Thunderstorm Warning | FFC | 29 min |
| Jun 26, 1:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:34 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 28, 3:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 28, 4:52 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 30, 3:21 AM EDT | Red Flag Warning | FFC | 17 hr |
| Jul 5, 1:40 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 5, 2:06 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 5, 4:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 5, 6:10 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Jul 5, 7:12 PM EDT | Mesoscale Discussion | SPC | 63 min |
| Jul 8, 1:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jul 8, 3:56 PM EDT | Severe Thunderstorm Warning | FFC | 49 min |
| Aug 11, 2:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Aug 30, 1:52 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 17, 1:20 PM EDT | Flood Watch | FFC | 5 days |
| Sep 18, 12:41 AM EDT | Flash Flood Warning | FFC | 6 hr |
| Sep 21, 10:50 AM EDT | River Flood Warning | FFC | 5 days |
| Sep 21, 10:11 PM EDT | Flash Flood Warning | FFC | 6 hr |
| Sep 21, 11:32 PM EDT | Flash Flood Warning | FFC | 5 hr |
| Sep 26, 6:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Oct 12, 11:27 AM EDT | River Flood Warning | FFC | 5 days |
| Oct 19, 4:48 AM EDT | Frost Advisory | FFC | 28 hr |
| Nov 10, 2:55 AM EST | Wind Advisory | FFC | 32 hr |
| Nov 10, 9:19 PM EST | River Flood Warning | FFC | 5 days |
| Nov 18, 9:20 PM EST | Dense Fog Advisory | FFC | 12 hr |
| Dec 1, 12:43 PM EST | Wind Advisory | FFC | 33 hr |
| Dec 1, 4:04 PM EST | Flood Watch | FFC | 25 hr |
| Dec 2, 10:32 AM EST | Tornado Watch | SPC | 6 hr |
| Dec 2, 5:34 PM EST | River Flood Warning | FFC | 3 days |
| Dec 8, 4:36 AM EST | Wind Advisory | FFC | 37 hr |
| Dec 9, 3:20 AM EST | Mesoscale Discussion | SPC | 85 min |
| Dec 9, 4:32 AM EST | Tornado Watch | SPC | 5 hr |
| Dec 9, 2:10 PM EST | River Flood Warning | FFC | 18 hr |
| Dec 10, 3:15 PM EST | Red Flag Warning | FFC | 27 hr |
| Dec 11, 3:55 PM EST | Flood Watch | FFC | 36 hr |
| Dec 13, 3:37 PM EST | Dense Fog Advisory | FFC | 18 hr |
| Dec 14, 12:05 PM EST | Flood Watch | FFC | 28 hr |
| Dec 14, 3:42 PM EST | Dense Fog Advisory | FFC | 12 hr |
| Dec 14, 5:53 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 17, 4:35 AM EST | Flood Watch | FFC | 40 hr |
| Dec 18, 3:58 AM EST | Wind Advisory | FFC | 12 hr |
| Dec 18, 7:27 PM EST | River Flood Warning | FFC | 3 days |
| Dec 23, 3:56 PM EST | Wind Advisory | FFC | 39 hr |
| Dec 25, 11:48 AM EST | River Flood Warning | FFC | 3 days |
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 | 21 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 9 |
| Mesoscale Discussion | 33 |
| Flooding | |
| Flash Flood Warning | 3 |
| River Flood Warning | 12 |
| Flood Watch | 5 |
| Winter | |
| Winter Weather Advisory | 1 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 17 |
| Fire | |
| Red Flag Warning | 25 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
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.