Alert archive / Florida / Duval County
Weather alerts in Duval County, Florida, 2011
172 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Duval County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 172
- Warnings
- 47
- Watches
- 4
- Advisories
- 47
- Busiest month
- June35 alerts
- Busiest day
- September 17, 201111 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 3 tornado warnings covering Duval County in 2011 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 5 minutes after it went out.
Duval County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 100% | 5 min |
| Severe thunderstorm warnings | 33 | 24 | 27% | 34 | 76% | 16 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 Jacksonville, FL: tornado warnings | 27 | 3 | 89% | 8 | 63% | 13 min |
| NWS Jacksonville, FL: severe thunderstorm warnings | 316 | 193 | 39% | 378 | 76% | 19 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 10, 8:18 AM EST | Severe Thunderstorm Warning | JAX | 42 min |
| Jan 25, 1:19 PM EST | Mesoscale Discussion | SPC | 56 min |
| Jan 25, 3:44 PM EST | Areal Flood Advisory | JAX | 91 min |
| Jan 25, 4:10 PM EST | Tornado Warning | JAX | 50 min |
| Mar 9, 7:08 PM EST | Special Weather Statement | JAX | 52 min |
| Mar 30, 8:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 30, 11:10 AM EDT | Tornado Watch | SPC | 8 hr |
| Mar 30, 3:32 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Mar 30, 4:06 PM EDT | Tornado Warning | JAX | 54 min |
| Mar 31, 7:03 AM EDT | Severe Thunderstorm Warning | JAX | 14 min |
| Mar 31, 9:25 AM EDT | Special Weather Statement | JAX | 50 min |
| Mar 31, 10:38 AM EDT | Special Weather Statement | JAX | 52 min |
| Mar 31, 10:50 AM EDT | Special Weather Statement | JAX | 25 min |
| Apr 5, 2:41 AM EDT | Tornado Watch | SPC | 6 hr |
| Apr 5, 2:55 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 5, 5:39 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 5, 6:12 AM EDT | Severe Thunderstorm Warning | JAX | 48 min |
| Apr 5, 7:11 AM EDT | Severe Thunderstorm Warning | JAX | 49 min |
| Apr 21, 5:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 28, 9:47 AM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Apr 28, 12:19 PM EDT | Mesoscale Discussion | SPC | 56 min |
| May 14, 12:03 PM EDT | Severe Thunderstorm Warning | JAX | 42 min |
| May 14, 12:27 PM EDT | Special Weather Statement | JAX | 48 min |
| May 14, 1:14 PM EDT | Special Weather Statement | JAX | 31 min |
| May 14, 9:15 PM EDT | Special Weather Statement | JAX | 45 min |
| May 27, 2:14 PM EDT | Special Weather Statement | JAX | 31 min |
| May 27, 4:05 PM EDT | Severe Thunderstorm Warning | JAX | 40 min |
| May 27, 4:29 PM EDT | Severe Thunderstorm Warning | JAX | 46 min |
| May 27, 4:32 PM EDT | Areal Flood Advisory | JAX | 88 min |
| May 27, 4:39 PM EDT | Severe Thunderstorm Warning | JAX | 36 min |
| May 27, 4:55 PM EDT | Special Weather Statement | JAX | 50 min |
| May 27, 5:01 PM EDT | Severe Thunderstorm Warning | JAX | 44 min |
| May 27, 5:13 PM EDT | Areal Flood Advisory | JAX | 62 min |
| Jun 6, 1:48 PM EDT | Mesoscale Discussion | SPC | 57 min |
| Jun 6, 2:58 PM EDT | Severe Thunderstorm Warning | JAX | 32 min |
| Jun 6, 3:10 PM EDT | Severe Thunderstorm Warning | JAX | 30 min |
| Jun 6, 3:20 PM EDT | Severe Thunderstorm Warning | JAX | 14 min |
| Jun 6, 3:32 PM EDT | Severe Thunderstorm Warning | JAX | 43 min |
| Jun 6, 3:55 PM EDT | Special Weather Statement | JAX | 50 min |
| Jun 6, 4:10 PM EDT | Special Weather Statement | JAX | 50 min |
| Jun 13, 4:26 PM EDT | Special Weather Statement | JAX | 49 min |
| Jun 13, 5:00 PM EDT | Severe Thunderstorm Warning | JAX | 45 min |
| Jun 13, 5:15 PM EDT | Special Weather Statement | JAX | 45 min |
| Jun 13, 6:12 PM EDT | Special Weather Statement | JAX | 48 min |
| Jun 13, 7:52 PM EDT | Special Weather Statement | JAX | 38 min |
| Jun 13, 8:03 PM EDT | Special Weather Statement | JAX | 42 min |
| Jun 13, 8:40 PM EDT | Special Weather Statement | JAX | 50 min |
| Jun 16, 3:43 AM EDT | Special Weather Statement | JAX | 47 min |
| Jun 17, 4:09 PM EDT | Special Weather Statement | JAX | 36 min |
| Jun 17, 4:28 PM EDT | Special Weather Statement | JAX | 47 min |
| Jun 17, 5:19 PM EDT | Special Weather Statement | JAX | 26 min |
| Jun 17, 9:24 PM EDT | Special Weather Statement | JAX | 51 min |
| Jun 23, 3:39 PM EDT | Severe Thunderstorm Warning | JAX | 51 min |
| Jun 23, 4:01 PM EDT | Special Weather Statement | JAX | 44 min |
| Jun 23, 4:07 PM EDT | Severe Thunderstorm Warning | JAX | 38 min |
| Jun 23, 4:48 PM EDT | Severe Thunderstorm Warning | JAX | 42 min |
| Jun 23, 5:28 PM EDT | Severe Thunderstorm Warning | JAX | 47 min |
| Jun 24, 2:28 PM EDT | Special Weather Statement | JAX | 32 min |
| Jun 25, 7:05 PM EDT | Special Weather Statement | JAX | 40 min |
| Jun 25, 7:07 PM EDT | Areal Flood Advisory | JAX | 83 min |
| Jun 26, 4:12 PM EDT | Areal Flood Advisory | JAX | 2 hr |
| Jun 26, 4:18 PM EDT | Special Weather Statement | JAX | 27 min |
| Jun 27, 6:28 PM EDT | Areal Flood Advisory | JAX | 33 min |
| Jun 28, 2:52 PM EDT | Areal Flood Advisory | JAX | 113 min |
| Jun 29, 5:08 PM EDT | Areal Flood Advisory | JAX | 112 min |
| Jun 30, 2:52 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 3:37 PM EDT | Special Weather Statement | JAX | 53 min |
| Jun 30, 3:56 PM EDT | Areal Flood Advisory | JAX | 41 min |
| Jul 7, 3:56 PM EDT | Areal Flood Advisory | JAX | 94 min |
| Jul 9, 3:59 PM EDT | Areal Flood Advisory | JAX | 60 min |
| Jul 9, 4:57 PM EDT | Areal Flood Advisory | JAX | 33 min |
| Jul 10, 3:17 PM EDT | Areal Flood Advisory | JAX | 43 min |
| Jul 11, 5:02 PM EDT | Areal Flood Advisory | JAX | 68 min |
| Jul 12, 6:10 PM EDT | Areal Flood Advisory | JAX | 50 min |
| Jul 12, 6:11 PM EDT | Special Weather Statement | JAX | 49 min |
| Jul 14, 4:24 PM EDT | Areal Flood Advisory | JAX | 81 min |
| Jul 15, 12:39 PM EDT | Areal Flood Advisory | JAX | 81 min |
| Jul 15, 12:49 PM EDT | Special Weather Statement | JAX | 41 min |
| Jul 16, 7:17 AM EDT | Areal Flood Advisory | JAX | 58 min |
| Jul 22, 4:59 PM EDT | Special Weather Statement | JAX | 31 min |
| Jul 22, 5:11 PM EDT | Areal Flood Advisory | JAX | 2 hr |
| Jul 22, 5:16 PM EDT | Severe Thunderstorm Warning | JAX | 32 min |
| Jul 24, 2:48 PM EDT | Special Weather Statement | JAX | 42 min |
| Jul 24, 3:08 PM EDT | Special Weather Statement | JAX | 37 min |
| Jul 24, 3:53 PM EDT | Special Weather Statement | JAX | 37 min |
| Jul 24, 4:02 PM EDT | Areal Flood Advisory | JAX | 80 min |
| Jul 24, 4:26 PM EDT | Special Weather Statement | JAX | 34 min |
| Jul 24, 5:02 PM EDT | Areal Flood Advisory | JAX | 85 min |
| Jul 24, 6:07 PM EDT | Areal Flood Advisory | JAX | 83 min |
| Jul 25, 2:36 PM EDT | Severe Thunderstorm Warning | JAX | 39 min |
| Jul 25, 2:57 PM EDT | Severe Thunderstorm Warning | JAX | 78 min |
| Jul 25, 3:34 PM EDT | Areal Flood Advisory | JAX | 116 min |
| Jul 25, 3:54 PM EDT | Areal Flood Advisory | JAX | 111 min |
| Jul 27, 8:34 PM EDT | Special Weather Statement | JAX | 41 min |
| Jul 29, 4:58 PM EDT | Areal Flood Advisory | JAX | 62 min |
| Jul 31, 2:14 PM EDT | Special Weather Statement | JAX | 31 min |
| Jul 31, 2:45 PM EDT | Special Weather Statement | JAX | 45 min |
| Aug 1, 5:12 PM EDT | Areal Flood Advisory | JAX | 2 hr |
| Aug 1, 6:27 PM EDT | Areal Flood Advisory | JAX | 2 hr |
| Aug 5, 5:55 PM EDT | Special Weather Statement | JAX | 50 min |
| Aug 7, 5:08 PM EDT | Areal Flood Advisory | JAX | 52 min |
| Aug 7, 6:19 PM EDT | Special Weather Statement | JAX | 26 min |
| Aug 8, 4:57 PM EDT | Areal Flood Advisory | JAX | 63 min |
| Aug 9, 3:02 PM EDT | Areal Flood Advisory | JAX | 87 min |
| Aug 9, 3:39 PM EDT | Areal Flood Advisory | JAX | 51 min |
| Aug 12, 5:46 PM EDT | Severe Thunderstorm Warning | JAX | 25 min |
| Aug 12, 6:18 PM EDT | Severe Thunderstorm Warning | JAX | 32 min |
| Aug 12, 6:28 PM EDT | Areal Flood Warning | JAX | 110 min |
| Aug 12, 6:28 PM EDT | Severe Thunderstorm Warning | JAX | 47 min |
| Aug 12, 6:28 PM EDT | Severe Thunderstorm Warning | JAX | 27 min |
| Aug 12, 6:58 PM EDT | Special Weather Statement | JAX | 47 min |
| Aug 12, 7:01 PM EDT | Severe Thunderstorm Warning | JAX | 27 min |
| Aug 12, 7:09 PM EDT | Areal Flood Warning | JAX | 96 min |
| Aug 12, 7:21 PM EDT | Areal Flood Warning | JAX | 56 min |
| Aug 13, 4:15 PM EDT | Severe Thunderstorm Warning | JAX | 60 min |
| Aug 13, 5:18 PM EDT | Special Weather Statement | JAX | 27 min |
| Aug 13, 5:24 PM EDT | Severe Thunderstorm Warning | JAX | 51 min |
| Aug 13, 5:35 PM EDT | Areal Flood Advisory | JAX | 115 min |
| Aug 13, 9:59 PM EDT | Areal Flood Advisory | JAX | 46 min |
| Aug 14, 12:10 AM EDT | Areal Flood Advisory | JAX | 65 min |
| Aug 18, 3:35 PM EDT | Areal Flood Advisory | JAX | 55 min |
| Aug 22, 6:35 PM EDT | Special Weather Statement | JAX | 40 min |
| Aug 22, 6:41 PM EDT | Severe Thunderstorm Warning | JAX | 49 min |
| Aug 22, 7:17 PM EDT | Severe Thunderstorm Warning | JAX | 23 min |
| Aug 25, 8:21 PM EDT | Special Weather Statement | JAX | 39 min |
| Aug 26, 8:05 AM EDT | Special Weather Statement | JAX | 40 min |
| Sep 5, 3:13 PM EDT | Special Weather Statement | JAX | 27 min |
| Sep 16, 7:21 PM EDT | Areal Flood Advisory | JAX | 84 min |
| Sep 16, 9:13 PM EDT | Areal Flood Advisory | JAX | 62 min |
| Sep 16, 10:01 PM EDT | Areal Flood Warning | JAX | 119 min |
| Sep 16, 10:28 PM EDT | Areal Flood Advisory | JAX | 92 min |
| Sep 16, 11:37 PM EDT | Areal Flood Warning | JAX | 83 min |
| Sep 17, 12:03 AM EDT | Areal Flood Warning | JAX | 56 min |
| Sep 17, 12:33 AM EDT | Areal Flood Warning | JAX | 117 min |
| Sep 17, 1:11 AM EDT | Areal Flood Warning | JAX | 3 hr |
| Sep 17, 2:06 AM EDT | Areal Flood Advisory | JAX | 114 min |
| Sep 17, 2:36 AM EDT | Areal Flood Warning | JAX | 3 hr |
| Sep 17, 2:46 AM EDT | Areal Flood Warning | JAX | 4 hr |
| Sep 17, 4:15 AM EDT | Areal Flood Warning | JAX | 6 hr |
| Sep 19, 7:37 AM EDT | Areal Flood Advisory | JAX | 83 min |
| Sep 19, 7:55 PM EDT | Areal Flood Advisory | JAX | 95 min |
| Sep 19, 9:06 PM EDT | Areal Flood Advisory | JAX | 84 min |
| Sep 23, 3:50 PM EDT | Areal Flood Advisory | JAX | 55 min |
| Sep 25, 5:57 PM EDT | Special Weather Statement | JAX | 48 min |
| Sep 25, 6:30 PM EDT | Special Weather Statement | JAX | 45 min |
| Sep 25, 7:14 PM EDT | Areal Flood Advisory | JAX | 2 hr |
| Sep 26, 4:39 PM EDT | Special Weather Statement | JAX | 51 min |
| Sep 26, 4:43 PM EDT | Areal Flood Advisory | JAX | 92 min |
| Sep 26, 4:50 PM EDT | Severe Thunderstorm Warning | JAX | 40 min |
| Sep 26, 4:51 PM EDT | Areal Flood Advisory | JAX | 84 min |
| Sep 26, 4:55 PM EDT | Severe Thunderstorm Warning | JAX | 50 min |
| Sep 26, 6:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 26, 6:17 PM EDT | Areal Flood Advisory | JAX | 43 min |
| Sep 26, 6:49 PM EDT | Special Weather Statement | JAX | 26 min |
| Sep 27, 3:44 PM EDT | Special Weather Statement | JAX | 46 min |
| Oct 6, 11:57 AM EDT | Special Weather Statement | JAX | 33 min |
| Oct 6, 9:45 PM EDT | Special Weather Statement | JAX | 30 min |
| Oct 7, 6:06 AM EDT | Special Weather Statement | JAX | 54 min |
| Oct 7, 3:29 PM EDT | Special Weather Statement | JAX | 61 min |
| Oct 7, 5:47 PM EDT | Special Weather Statement | JAX | 43 min |
| Oct 7, 5:48 PM EDT | Special Weather Statement | JAX | 117 min |
| Oct 8, 5:38 PM EDT | Special Weather Statement | JAX | 37 min |
| Oct 8, 6:08 PM EDT | Special Weather Statement | JAX | 52 min |
| Oct 10, 3:52 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Oct 10, 4:15 AM EDT | Tornado Warning | JAX | 30 min |
| Oct 10, 4:26 AM EDT | Tornado Watch | SPC | 9 hr |
| Oct 10, 6:15 AM EDT | Special Weather Statement | JAX | 60 min |
| Oct 10, 8:30 AM EDT | Mesoscale Discussion | SPC | 90 min |
| Nov 16, 5:35 PM EST | Mesoscale Discussion | SPC | 85 min |
| Nov 17, 12:47 AM EST | Mesoscale Discussion | SPC | 58 min |
| Nov 17, 1:31 AM EST | Severe Thunderstorm Warning | JAX | 44 min |
| Nov 17, 3:14 AM EST | Special Weather Statement | JAX | 46 min |
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 | 33 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 1 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 60 |
| Flooding | |
| Areal Flood Warning | 11 |
| Areal Flood Advisory | 47 |
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.