Alert archive / Georgia / Chattahoochee County
Weather alerts in Chattahoochee County, Georgia, 2011
141 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Chattahoochee County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 141
- Warnings
- 21
- Watches
- 20
- Advisories
- 27
- Busiest month
- April28 alerts
- Busiest day
- March 27, 20118 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 Chattahoochee County in 2011 had a tornado report inside them; 3 of 3 tornado reports fell inside a warning, on average 4 minutes after it went out.
Chattahoochee County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 1 | 0% | 3 | 100% | 4 min |
| Severe thunderstorm warnings | 17 | 11 | 35% | 5 | 40% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Atlanta, GA: tornado warnings | 108 | 25 | 77% | 75 | 79% | 24 min |
| NWS Atlanta, GA: severe thunderstorm warnings | 523 | 338 | 35% | 961 | 74% | 21 min |
| NWS Atlanta, GA: flash flood warnings | 15 | 7 | 53% | 17 | 94% | 85 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 7, 1:29 PM EST | Wind Advisory | FFC | 6 hr |
| Jan 7, 4:01 PM EST | Winter Storm Watch | FFC | 37 hr |
| Jan 9, 4:57 AM EST | Winter Storm Warning | FFC | 34 hr |
| Jan 10, 3:06 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 10, 2:53 PM EST | Freezing Rain Advisory | FFC | 21 hr |
| Jan 26, 8:53 AM EST | Wind Advisory | FFC | 9 hr |
| Feb 1, 3:29 AM EST | Wind Advisory | FFC | 36 hr |
| Feb 1, 8:50 PM EST | Mesoscale Discussion | SPC | 115 min |
| Feb 3, 1:55 PM EST | Flood Watch | FFC | 37 hr |
| Feb 25, 3:19 AM EST | Wind Advisory | FFC | 13 hr |
| Feb 28, 4:04 AM EST | Wind Advisory | FFC | 15 hr |
| Feb 28, 4:36 PM EST | Mesoscale Discussion | SPC | 84 min |
| Feb 28, 5:04 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 6, 1:25 AM EST | Wind Advisory | FFC | 15 hr |
| Mar 9, 3:17 PM EST | Wind Advisory | FFC | 28 hr |
| Mar 11, 3:55 PM EST | Frost Advisory | FFC | 16 hr |
| Mar 24, 3:56 AM EDT | Wind Advisory | FFC | 11 hr |
| Mar 24, 4:08 AM EDT | Red Flag Warning | FFC | 15 hr |
| Mar 26, 1:15 PM EDT | Tornado Watch | SPC | 8 hr |
| Mar 26, 3:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Mar 26, 7:21 PM EDT | Severe Thunderstorm Warning | FFC | 54 min |
| Mar 26, 7:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Mar 26, 8:47 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 27, 12:21 AM EDT | Mesoscale Discussion | SPC | 54 min |
| Mar 27, 3:03 AM EDT | Mesoscale Discussion | SPC | 57 min |
| Mar 27, 3:25 AM EDT | Tornado Watch | SPC | 3 hr |
| Mar 27, 8:33 AM EDT | Mesoscale Discussion | SPC | 117 min |
| Mar 27, 9:55 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 27, 11:51 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Mar 27, 1:38 PM EDT | Severe Thunderstorm Warning | FFC | 37 min |
| Mar 28, 12:22 AM EDT | Severe Thunderstorm Warning | FFC | 38 min |
| Mar 28, 1:01 AM EDT | Severe Thunderstorm Warning | FFC | 44 min |
| Apr 3, 2:50 PM EDT | Wind Advisory | FFC | 53 hr |
| Apr 4, 10:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Apr 4, 10:28 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 4, 11:50 PM EDT | Severe Thunderstorm Warning | FFC | 55 min |
| Apr 5, 12:21 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 5, 12:41 AM EDT | Severe Thunderstorm Warning | FFC | 49 min |
| Apr 8, 3:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 10, 3:23 PM EDT | Wind Advisory | FFC | 31 hr |
| Apr 11, 7:42 PM EDT | Mesoscale Discussion | SPC | 33 min |
| Apr 11, 9:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 11, 11:00 PM EDT | Mesoscale Discussion | SPC | 30 min |
| Apr 11, 11:26 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Apr 11, 11:42 PM EDT | Severe Thunderstorm Warning | FFC | 48 min |
| Apr 12, 4:28 AM EDT | Wind Advisory | FFC | 16 hr |
| Apr 15, 9:12 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 15, 11:41 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 16, 3:35 AM EDT | Wind Advisory | FFC | 16 hr |
| Apr 16, 4:40 AM EDT | Severe Thunderstorm Warning | FFC | 50 min |
| Apr 16, 4:45 AM EDT | Tornado Warning | FFC | 45 min |
| Apr 16, 5:12 AM EDT | Severe Thunderstorm Warning | FFC | 48 min |
| Apr 20, 2:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Apr 20, 2:33 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 26, 2:41 PM EDT | Wind Advisory | FFC | 30 hr |
| Apr 27, 6:41 PM EDT | Mesoscale Discussion | SPC | 34 min |
| Apr 27, 6:52 PM EDT | Tornado Watch | SPC | 9 hr |
| Apr 28, 12:09 AM EDT | Mesoscale Discussion | SPC | 36 min |
| Apr 28, 12:56 AM EDT | Tornado Watch | SPC | 4 hr |
| Apr 28, 3:30 AM EDT | Mesoscale Discussion | SPC | 90 min |
| May 13, 6:10 PM EDT | Special Weather Statement | FFC | 65 min |
| May 13, 6:48 PM EDT | Special Weather Statement | FFC | 42 min |
| May 26, 3:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 4:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 26, 4:56 PM EDT | Special Weather Statement | FFC | 34 min |
| Jun 2, 5:31 PM EDT | Special Weather Statement | FFC | 29 min |
| Jun 2, 5:49 PM EDT | Severe Thunderstorm Warning | FFC | 41 min |
| Jun 2, 6:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jun 3, 6:32 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Jun 9, 4:11 PM EDT | Special Weather Statement | FFC | 34 min |
| Jun 15, 7:35 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 11:25 PM EDT | Special Weather Statement | FFC | 50 min |
| Jun 15, 11:56 PM EDT | Severe Thunderstorm Warning | FFC | 20 min |
| Jun 16, 12:21 AM EDT | Special Weather Statement | FFC | 39 min |
| Jun 16, 12:35 AM EDT | Severe Thunderstorm Warning | FFC | 22 min |
| Jun 16, 1:17 PM EDT | Special Weather Statement | FFC | 43 min |
| Jun 17, 4:13 PM EDT | Special Weather Statement | FFC | 47 min |
| Jun 17, 4:56 PM EDT | Special Weather Statement | FFC | 34 min |
| Jun 22, 3:27 PM EDT | Special Weather Statement | FFC | 33 min |
| Jun 23, 4:29 PM EDT | Special Weather Statement | FFC | 46 min |
| Jun 23, 5:17 PM EDT | Special Weather Statement | FFC | 43 min |
| Jun 24, 6:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jun 26, 8:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 27, 2:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 28, 1:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 28, 2:32 PM EDT | Special Weather Statement | FFC | 43 min |
| Jun 28, 2:42 PM EDT | Severe Thunderstorm Warning | FFC | 22 min |
| Jun 30, 2:52 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 11:35 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 1, 4:41 PM EDT | Special Weather Statement | FFC | 34 min |
| Jul 3, 5:24 PM EDT | Severe Thunderstorm Warning | FFC | 36 min |
| Jul 8, 2:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 9, 1:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 11, 3:56 PM EDT | Heat Advisory | FFC | 36 hr |
| Jul 11, 7:14 PM EDT | Special Weather Statement | FFC | 31 min |
| Jul 12, 3:08 PM EDT | Heat Advisory | FFC | 37 hr |
| Jul 14, 1:48 PM EDT | Special Weather Statement | FFC | 27 min |
| Jul 14, 2:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 26, 4:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 27, 5:36 PM EDT | Special Weather Statement | FFC | 39 min |
| Aug 2, 4:11 AM EDT | Heat Advisory | FFC | 64 hr |
| Aug 4, 4:16 PM EDT | Heat Advisory | FFC | 5 days |
| Aug 8, 6:54 PM EDT | Special Weather Statement | FFC | 36 min |
| Aug 8, 7:27 PM EDT | Special Weather Statement | FFC | 63 min |
| Aug 9, 2:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 9, 4:54 PM EDT | Severe Thunderstorm Warning | FFC | 36 min |
| Aug 11, 2:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Aug 11, 2:30 PM EDT | Severe Thunderstorm Warning | FFC | 45 min |
| Aug 12, 3:05 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 20, 3:46 PM EDT | Special Weather Statement | FFC | 29 min |
| Sep 5, 8:24 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Sep 5, 12:01 PM EDT | Mesoscale Discussion | SPC | 29 min |
| Sep 5, 12:10 PM EDT | Tornado Watch | SPC | 4 hr |
| Sep 5, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Sep 5, 3:42 PM EDT | Tornado Watch | SPC | 7 hr |
| Sep 5, 7:37 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Sep 28, 8:56 AM EDT | Special Weather Statement | FFC | 49 min |
| Oct 1, 10:08 AM EDT | Red Flag Warning | FFC | 8 hr |
| Oct 13, 2:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Oct 13, 3:56 PM EDT | Special Weather Statement | FFC | 34 min |
| Oct 21, 4:03 AM EDT | Frost Advisory | FFC | 30 hr |
| Nov 10, 4:41 AM EST | Frost Advisory | FFC | 27 hr |
| Nov 10, 4:41 AM EST | Wind Advisory | FFC | 12 hr |
| Nov 16, 10:46 AM EST | Tornado Watch | SPC | 7 hr |
| Nov 16, 10:59 AM EST | Mesoscale Discussion | SPC | 91 min |
| Nov 16, 1:17 PM EST | Mesoscale Discussion | SPC | 118 min |
| Nov 16, 2:13 PM EST | Special Weather Statement | FFC | 47 min |
| Nov 16, 2:41 PM EST | Severe Thunderstorm Warning | FFC | 24 min |
| Nov 21, 7:34 AM EST | Dense Fog Advisory | FFC | 2 hr |
| Nov 22, 4:24 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Nov 22, 6:15 PM EST | Tornado Watch | SPC | 5 hr |
| Nov 22, 7:57 PM EST | Mesoscale Discussion | SPC | 93 min |
| Nov 22, 8:00 PM EST | Special Weather Statement | FFC | 30 min |
| Nov 22, 8:28 PM EST | Special Weather Statement | FFC | 32 min |
| Nov 27, 10:00 AM EST | Wind Advisory | FFC | 6 hr |
| Dec 7, 2:45 AM EST | Wind Advisory | FFC | 17 hr |
| Dec 22, 2:02 PM EST | Mesoscale Discussion | SPC | 118 min |
| Dec 22, 3:20 PM EST | Tornado Watch | SPC | 6 hr |
| Dec 22, 6:25 PM EST | Mesoscale Discussion | SPC | 95 min |
| Dec 27, 3:24 AM EST | Wind Advisory | FFC | 14 hr |
| Dec 31, 5:33 AM EST | Dense Fog Advisory | FFC | 4 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 | 17 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 12 |
| Mesoscale Discussion | 47 |
| Special Weather Statement | 26 |
| Flooding | |
| Flood Watch | 1 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Freezing Rain Advisory | 1 |
| Heat | |
| Heat Advisory | 4 |
| Cold | |
| Frost Advisory | 3 |
| Wind and dust | |
| Wind Advisory | 17 |
| Fire | |
| Red Flag Warning | 2 |
| 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 archive20102012
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.