Alert archive / Georgia / Chattahoochee County
Weather alerts in Chattahoochee County, Georgia, 2021
102 weather alerts in 2021, 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 2021. Tap one for its archive.
- Alerts
- 102
- Warnings
- 11
- Watches
- 18
- Advisories
- 23
- Busiest month
- December19 alerts
- Busiest day
- May 3, 20217 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Chattahoochee County in 2021 had a tornado report inside them.
Chattahoochee County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 4 | 2 | 50% | 0 | ||
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Atlanta, GA: tornado warnings | 48 | 14 | 71% | 41 | 54% | 10 min |
| NWS Atlanta, GA: severe thunderstorm warnings | 183 | 100 | 45% | 442 | 59% | 16 min |
| NWS Atlanta, GA: flash flood warnings | 56 | 38 | 32% | 244 | 70% | 167 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 |
|---|---|---|---|
| Feb 1, 4:33 AM EST | Wind Advisory | FFC | 38 hr |
| Feb 9, 10:45 PM EST | Dense Fog Advisory | FFC | 12 hr |
| Feb 10, 10:42 PM EST | Dense Fog Advisory | FFC | 12 hr |
| Feb 12, 4:38 AM EST | Dense Fog Advisory | FFC | 5 hr |
| Feb 17, 2:20 PM EST | Flash Flood Watch | FFC | 29 hr |
| Mar 16, 2:07 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 17, 2:22 AM EDT | Dense Fog Advisory | FFC | 9 hr |
| Mar 18, 12:02 AM EDT | Tornado Watch | SPC | 9 hr |
| Mar 18, 12:44 AM EDT | Special Weather Statement | FFC | 31 min |
| Mar 18, 2:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Mar 18, 4:09 AM EDT | Wind Advisory | FFC | 16 hr |
| Mar 26, 11:09 AM EDT | Special Weather Statement | FFC | 51 min |
| Mar 28, 1:41 PM EDT | Special Weather Statement | FFC | 34 min |
| Mar 31, 11:57 AM EDT | Mesoscale Discussion | SPC | 93 min |
| Mar 31, 3:44 PM EDT | Special Weather Statement | FFC | 31 min |
| Mar 31, 4:22 PM EDT | Wind Advisory | FFC | 27 hr |
| Apr 1, 2:52 AM EDT | Freeze Warning | FFC | 31 hr |
| Apr 1, 3:14 PM EDT | Freeze Watch | FFC | 21 hr |
| Apr 2, 11:49 AM EDT | Freeze Warning | FFC | 22 hr |
| Apr 3, 2:49 PM EDT | Frost Advisory | FFC | 18 hr |
| Apr 9, 8:38 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 20, 2:39 PM EDT | Fire Weather Watch | FFC | 15 hr |
| Apr 20, 2:41 PM EDT | Wind Advisory | FFC | 31 hr |
| Apr 24, 4:00 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 10:29 AM EDT | Tornado Watch | SPC | 5 hr |
| May 3, 2:30 PM EDT | Special Weather Statement | FFC | 45 min |
| May 3, 3:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| May 3, 3:16 PM EDT | Special Weather Statement | FFC | 29 min |
| May 3, 3:23 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 3, 5:00 PM EDT | Mesoscale Discussion | SPC | 90 min |
| May 3, 5:40 PM EDT | Flash Flood Watch | FFC | 32 hr |
| May 3, 11:38 PM EDT | Special Weather Statement | FFC | 67 min |
| May 4, 6:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 4, 7:26 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 4, 8:25 PM EDT | Severe Thunderstorm Warning | FFC | 50 min |
| May 4, 8:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| May 5, 9:09 PM EDT | River Flood Warning | FFC | 33 hr |
| May 7, 6:39 AM EDT | River Flood Warning | FFC | 3 hr |
| May 28, 9:42 PM EDT | Special Weather Statement | FFC | 33 min |
| May 28, 10:20 PM EDT | Special Weather Statement | FFC | 25 min |
| Jun 5, 8:28 PM EDT | Special Weather Statement | FFC | 32 min |
| Jun 6, 5:56 PM EDT | Special Weather Statement | FFC | 34 min |
| Jun 11, 4:15 PM EDT | Special Weather Statement | FFC | 30 min |
| Jun 11, 4:42 PM EDT | Severe Thunderstorm Warning | FFC | 33 min |
| Jun 12, 1:14 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 18, 3:46 AM EDT | Flash Flood Watch | FFC | 59 hr |
| Jun 19, 10:33 AM EDT | Tornado Watch | SPC | 9 hr |
| Jun 19, 7:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 8:00 PM EDT | Tornado Watch | SPC | 13 hr |
| Jun 20, 12:58 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 2:36 AM EDT | Special Weather Statement | FFC | 24 min |
| Jun 20, 3:02 AM EDT | Special Weather Statement | FFC | 28 min |
| Jun 20, 3:22 AM EDT | Tornado Warning | FFC | 23 min |
| Jul 6, 6:46 PM EDT | Special Weather Statement | FFC | 44 min |
| Jul 7, 2:44 PM EDT | Special Weather Statement | FFC | 61 min |
| Jul 9, 7:34 PM EDT | Special Weather Statement | FFC | 26 min |
| Jul 9, 7:59 PM EDT | Special Weather Statement | FFC | 46 min |
| Jul 11, 1:54 PM EDT | Special Weather Statement | FFC | 36 min |
| Jul 12, 4:47 PM EDT | Special Weather Statement | FFC | 43 min |
| Jul 27, 4:45 AM EDT | Heat Advisory | FFC | 15 hr |
| Jul 29, 5:32 AM EDT | Heat Advisory | FFC | 14 hr |
| Jul 29, 10:36 AM EDT | Excessive Heat Watch | FFC | 28 hr |
| Jul 29, 10:36 AM EDT | Heat Advisory | FFC | 33 hr |
| Jul 30, 2:50 PM EDT | Heat Advisory | FFC | 29 hr |
| Jul 31, 3:58 PM EDT | Special Weather Statement | FFC | 32 min |
| Jul 31, 7:26 PM EDT | Special Weather Statement | FFC | 34 min |
| Aug 1, 1:09 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 7:06 PM EDT | Special Weather Statement | FFC | 39 min |
| Aug 2, 5:21 PM EDT | Special Weather Statement | FFC | 39 min |
| Aug 9, 7:47 PM EDT | Special Weather Statement | FFC | 28 min |
| Aug 16, 4:32 AM EDT | Flash Flood Watch | FFC | 40 hr |
| Aug 16, 12:19 PM EDT | Wind Advisory | FFC | 19 hr |
| Aug 17, 12:53 AM EDT | Special Weather Statement | FFC | 7 min |
| Aug 17, 12:54 AM EDT | Special Weather Statement | FFC | 21 min |
| Aug 25, 5:05 PM EDT | Special Weather Statement | FFC | 25 min |
| Aug 31, 8:44 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 31, 4:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 19, 3:04 AM EDT | Flash Flood Watch | FFC | 47 hr |
| Oct 4, 11:04 AM EDT | Flash Flood Watch | FFC | 4 days |
| Oct 5, 10:50 AM EDT | River Flood Warning | FFC | 19 hr |
| Nov 12, 4:30 AM EST | Freeze Watch | FFC | 26 hr |
| Nov 13, 6:02 AM EST | Frost Advisory | FFC | 27 hr |
| Nov 13, 6:02 AM EST | Freeze Warning | FFC | 27 hr |
| Dec 5, 3:38 AM EST | Dense Fog Advisory | FFC | 6 hr |
| Dec 6, 5:16 AM EST | Dense Fog Advisory | FFC | 5 hr |
| Dec 6, 2:08 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 8, 11:02 PM EST | Dense Fog Advisory | FFC | 11 hr |
| Dec 11, 4:15 PM EST | Special Weather Statement | FFC | 30 min |
| Dec 16, 9:33 PM EST | Dense Fog Advisory | FFC | 12 hr |
| Dec 17, 10:06 AM EST | Dense Fog Advisory | FFC | 114 min |
| Dec 18, 2:50 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 25, 5:07 AM EST | Dense Fog Advisory | FFC | 4 hr |
| Dec 26, 9:22 PM EST | Dense Fog Advisory | FFC | 13 hr |
| Dec 29, 3:50 PM EST | Special Weather Statement | FFC | 25 min |
| Dec 29, 4:17 PM EST | Special Weather Statement | FFC | 28 min |
| Dec 29, 4:47 PM EST | Special Weather Statement | FFC | 28 min |
| Dec 30, 11:34 AM EST | Mesoscale Discussion | SPC | 116 min |
| Dec 30, 2:05 PM EST | Severe Thunderstorm Watch | SPC | 7 hr |
| Dec 30, 3:54 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Dec 30, 3:59 PM EST | Severe Thunderstorm Warning | FFC | 46 min |
| Dec 30, 4:23 PM EST | Severe Thunderstorm Warning | FFC | 37 min |
| Dec 31, 3:48 AM EST | Dense Fog Advisory | FFC | 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 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 32 |
| Flooding | |
| River Flood Warning | 3 |
| Flash Flood Watch | 6 |
| Heat | |
| Excessive Heat Watch | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 2 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20202022
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.