Alert archive / Arkansas / Sebastian County
Weather alerts in Sebastian County, Arkansas, 2011
222 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sebastian County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 222
- Warnings
- 81
- Watches
- 31
- Advisories
- 7
- Busiest month
- April74 alerts
- Busiest day
- April 25, 201116 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
4 of 11 tornado warnings covering Sebastian County in 2011 had a tornado report inside them.
Sebastian County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 11 | 4 | 64% | 0 | ||
| Severe thunderstorm warnings | 48 | 29 | 40% | 25 | 72% | 24 min |
| Flash flood warnings | 9 | 6 | 33% | 4 | 100% | 32 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Tulsa, OK: tornado warnings | 119 | 32 | 73% | 44 | 80% | 21 min |
| NWS Tulsa, OK: severe thunderstorm warnings | 568 | 280 | 51% | 629 | 77% | 26 min |
| NWS Tulsa, OK: flash flood warnings | 72 | 23 | 68% | 94 | 95% | 122 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 9, 3:29 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 9, 10:03 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 24, 10:34 AM CST | Mesoscale Discussion | SPC | 56 min |
| Feb 24, 11:25 AM CST | Tornado Watch | SPC | 9 hr |
| Feb 24, 2:39 PM CST | Mesoscale Discussion | SPC | 66 min |
| Feb 27, 8:07 PM CST | Mesoscale Discussion | SPC | 53 min |
| Feb 27, 10:04 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 27, 10:48 PM CST | Severe Thunderstorm Warning | TSA | 42 min |
| Feb 27, 11:27 PM CST | Severe Thunderstorm Warning | TSA | 48 min |
| Feb 27, 11:49 PM CST | Mesoscale Discussion | SPC | 86 min |
| Mar 4, 3:55 PM CST | Mesoscale Discussion | SPC | 95 min |
| Mar 4, 6:50 PM CST | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 13, 11:15 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Mar 25, 10:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Mar 26, 1:17 AM CDT | Severe Thunderstorm Warning | TSA | 43 min |
| Apr 4, 3:44 AM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 4, 5:21 AM CDT | Severe Thunderstorm Warning | TSA | 32 min |
| Apr 4, 5:48 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 10, 7:28 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 11, 1:01 AM CDT | Special Weather Statement | TSA | 29 min |
| Apr 11, 2:04 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Apr 14, 7:33 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Apr 14, 9:06 PM CDT | Tornado Watch | SPC | 6 hr |
| Apr 14, 9:14 PM CDT | Tornado Warning | TSA | 61 min |
| Apr 14, 9:48 PM CDT | Tornado Warning | TSA | 42 min |
| Apr 14, 10:17 PM CDT | Tornado Warning | TSA | 58 min |
| Apr 14, 10:28 PM CDT | Tornado Warning | TSA | 62 min |
| Apr 14, 10:36 PM CDT | Areal Flood Advisory | TSA | 114 min |
| Apr 14, 11:11 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Apr 14, 11:12 PM CDT | Tornado Warning | TSA | 33 min |
| Apr 19, 1:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 19, 2:16 PM CDT | Tornado Watch | SPC | 10 hr |
| Apr 19, 7:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Apr 20, 1:59 PM CDT | Special Weather Statement | TSA | 31 min |
| Apr 20, 2:09 PM CDT | Severe Thunderstorm Warning | TSA | 28 min |
| Apr 20, 2:52 PM CDT | Special Weather Statement | TSA | 23 min |
| Apr 21, 2:25 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 21, 2:35 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 21, 5:21 PM CDT | Severe Thunderstorm Warning | TSA | 39 min |
| Apr 21, 6:02 PM CDT | Special Weather Statement | TSA | 28 min |
| Apr 21, 6:13 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 22, 10:44 AM CDT | Mesoscale Discussion | SPC | 61 min |
| Apr 22, 1:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 22, 3:47 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 22, 9:39 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 22, 10:02 PM CDT | Special Weather Statement | TSA | 43 min |
| Apr 23, 12:49 AM CDT | Special Weather Statement | TSA | 56 min |
| Apr 23, 2:45 AM CDT | Special Weather Statement | TSA | 60 min |
| Apr 23, 9:15 AM CDT | Special Weather Statement | TSA | 30 min |
| Apr 23, 5:02 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Apr 23, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 23, 8:09 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 5:34 PM CDT | Mesoscale Discussion | SPC | 26 min |
| Apr 24, 5:36 PM CDT | Tornado Watch | SPC | 7 hr |
| Apr 24, 6:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 24, 6:29 PM CDT | Areal Flood Advisory | TSA | 61 min |
| Apr 24, 6:48 PM CDT | Flash Flood Warning | TSA | 6 hr |
| Apr 24, 6:48 PM CDT | Severe Thunderstorm Warning | TSA | 42 min |
| Apr 24, 6:52 PM CDT | Severe Thunderstorm Warning | TSA | 53 min |
| Apr 24, 7:22 PM CDT | Severe Thunderstorm Warning | TSA | 38 min |
| Apr 24, 7:43 PM CDT | Severe Thunderstorm Warning | TSA | 27 min |
| Apr 24, 9:06 PM CDT | River Flood Warning | TSA | 4 days |
| Apr 24, 9:09 PM CDT | Special Weather Statement | LZK | 46 min |
| Apr 24, 9:38 PM CDT | Severe Thunderstorm Warning | TSA | 35 min |
| Apr 25, 12:54 AM CDT | Areal Flood Warning | TSA | 6 hr |
| Apr 25, 6:35 AM CDT | Severe Thunderstorm Warning | TSA | 25 min |
| Apr 25, 11:00 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 25, 11:02 AM CDT | Special Weather Statement | TSA | 28 min |
| Apr 25, 11:26 AM CDT | Special Weather Statement | TSA | 34 min |
| Apr 25, 11:50 AM CDT | Flash Flood Warning | TSA | 6 hr |
| Apr 25, 11:53 AM CDT | Severe Thunderstorm Warning | TSA | 52 min |
| Apr 25, 1:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Apr 25, 2:08 PM CDT | Severe Thunderstorm Warning | TSA | 39 min |
| Apr 25, 4:12 PM CDT | Special Weather Statement | TSA | 33 min |
| Apr 25, 5:56 PM CDT | Areal Flood Warning | TSA | 18 hr |
| Apr 26, 11:58 AM CDT | Areal Flood Warning | TSA | 12 hr |
| Apr 26, 5:00 PM CDT | Mesoscale Discussion | SPC | 30 min |
| Apr 26, 5:08 PM CDT | Tornado Watch | SPC | 5 hr |
| Apr 26, 5:28 PM CDT | Severe Thunderstorm Warning | TSA | 47 min |
| Apr 26, 5:38 PM CDT | Tornado Warning | TSA | 37 min |
| Apr 26, 5:56 PM CDT | Flash Flood Warning | TSA | 4 hr |
| Apr 26, 6:00 PM CDT | Severe Thunderstorm Warning | TSA | 30 min |
| Apr 26, 6:06 PM CDT | Severe Thunderstorm Warning | TSA | 54 min |
| Apr 26, 6:09 PM CDT | Tornado Warning | TSA | 51 min |
| Apr 26, 6:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Apr 26, 6:22 PM CDT | Severe Thunderstorm Warning | TSA | 38 min |
| Apr 26, 11:51 PM CDT | Areal Flood Warning | TSA | 12 hr |
| Apr 27, 8:40 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 27, 12:00 PM CDT | Areal Flood Warning | TSA | 48 hr |
| May 1, 3:55 PM CDT | Special Weather Statement | TSA | 35 min |
| May 1, 4:13 PM CDT | Special Weather Statement | TSA | 32 min |
| May 1, 5:37 PM CDT | Areal Flood Advisory | TSA | 53 min |
| May 1, 6:13 PM CDT | Flash Flood Warning | TSA | 6 hr |
| May 1, 11:55 PM CDT | Areal Flood Warning | TSA | 12 hr |
| May 2, 11:50 AM CDT | Areal Flood Warning | TSA | 48 hr |
| May 11, 1:16 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 11, 6:21 PM CDT | Special Weather Statement | TSA | 39 min |
| May 11, 6:30 PM CDT | Severe Thunderstorm Warning | TSA | 60 min |
| May 11, 6:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| May 12, 1:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| May 12, 3:17 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 12, 6:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 12, 6:37 PM CDT | Severe Thunderstorm Warning | TSA | 53 min |
| May 12, 7:08 PM CDT | Severe Thunderstorm Warning | TSA | 67 min |
| May 12, 7:26 PM CDT | Areal Flood Advisory | TSA | 3 hr |
| May 12, 8:12 PM CDT | Special Weather Statement | TSA | 63 min |
| May 12, 8:35 PM CDT | Flash Flood Warning | TSA | 4 hr |
| May 12, 8:52 PM CDT | Severe Thunderstorm Warning | TSA | 68 min |
| May 12, 9:41 PM CDT | Mesoscale Discussion | SPC | 64 min |
| May 12, 10:03 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 13, 12:23 AM CDT | Areal Flood Warning | TSA | 6 hr |
| May 20, 8:50 AM CDT | Special Weather Statement | TSA | 40 min |
| May 20, 10:30 AM CDT | Mesoscale Discussion | SPC | 60 min |
| May 20, 11:03 AM CDT | Tornado Watch | SPC | 7 hr |
| May 20, 11:35 AM CDT | Severe Thunderstorm Warning | TSA | 55 min |
| May 20, 12:30 PM CDT | Severe Thunderstorm Warning | TSA | 60 min |
| May 20, 1:18 PM CDT | Areal Flood Advisory | TSA | 57 min |
| May 20, 1:27 PM CDT | Severe Thunderstorm Warning | TSA | 63 min |
| May 20, 1:28 PM CDT | Mesoscale Discussion | SPC | 62 min |
| May 20, 5:22 PM CDT | Severe Thunderstorm Warning | TSA | 68 min |
| May 20, 5:52 PM CDT | Areal Flood Advisory | TSA | 53 min |
| May 21, 8:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 22, 1:27 PM CDT | Tornado Watch | SPC | 8 hr |
| May 22, 8:47 PM CDT | Tornado Watch | SPC | 7 hr |
| May 22, 10:50 PM CDT | Severe Thunderstorm Warning | TSA | 40 min |
| May 22, 11:01 PM CDT | Severe Thunderstorm Warning | TSA | 59 min |
| May 22, 11:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 23, 9:14 AM CDT | Mesoscale Discussion | SPC | 91 min |
| May 23, 5:24 PM CDT | Tornado Watch | SPC | 4 hr |
| May 23, 9:04 PM CDT | Severe Thunderstorm Warning | TSA | 41 min |
| May 23, 9:31 PM CDT | Severe Thunderstorm Warning | TSA | 59 min |
| May 23, 9:42 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 23, 9:42 PM CDT | Severe Thunderstorm Warning | TSA | 33 min |
| May 23, 9:49 PM CDT | Severe Thunderstorm Warning | TSA | 56 min |
| May 23, 10:04 PM CDT | Flash Flood Warning | TSA | 4 hr |
| May 23, 10:08 PM CDT | Severe Thunderstorm Warning | TSA | 47 min |
| May 23, 10:42 PM CDT | Flash Flood Warning | TSA | 3 hr |
| May 24, 1:33 AM CDT | Areal Flood Warning | TSA | 10 hr |
| May 24, 2:08 AM CDT | Mesoscale Discussion | SPC | 97 min |
| May 24, 8:17 AM CDT | River Flood Warning | TSA | 12 hr |
| May 24, 11:55 AM CDT | Areal Flood Warning | TSA | 48 hr |
| May 24, 7:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| May 24, 8:05 PM CDT | Tornado Watch | SPC | 7 hr |
| May 24, 10:53 PM CDT | Severe Thunderstorm Warning | TSA | 67 min |
| May 24, 10:56 PM CDT | Tornado Warning | TSA | 49 min |
| May 24, 11:15 PM CDT | Flash Flood Warning | TSA | 3 hr |
| May 24, 11:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 24, 11:27 PM CDT | Tornado Warning | TSA | 33 min |
| May 24, 11:31 PM CDT | Severe Thunderstorm Warning | TSA | 29 min |
| May 24, 11:41 PM CDT | Tornado Warning | TSA | 34 min |
| May 24, 11:56 PM CDT | Tornado Warning | TSA | 38 min |
| Jun 5, 4:46 PM CDT | Special Weather Statement | TSA | 29 min |
| Jun 11, 2:41 PM CDT | Special Weather Statement | TSA | 34 min |
| Jun 11, 3:12 PM CDT | Special Weather Statement | TSA | 33 min |
| Jun 11, 3:46 PM CDT | Special Weather Statement | TSA | 44 min |
| Jun 11, 4:57 PM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 14, 5:27 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 15, 12:02 AM CDT | Severe Thunderstorm Warning | TSA | 28 min |
| Jun 15, 12:25 AM CDT | Severe Thunderstorm Warning | TSA | 50 min |
| Jun 16, 5:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 20, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 21, 3:15 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Jun 21, 6:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 21, 6:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 28, 3:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jun 30, 12:47 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 4:14 PM CDT | Severe Thunderstorm Warning | TSA | 46 min |
| Jul 1, 6:42 PM CDT | Special Weather Statement | TSA | 33 min |
| Jul 2, 3:14 PM CDT | Special Weather Statement | TSA | 31 min |
| Jul 7, 1:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jul 10, 6:15 PM CDT | Special Weather Statement | LZK | 30 min |
| Jul 13, 1:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 13, 2:06 PM CDT | Severe Thunderstorm Warning | TSA | 39 min |
| Jul 13, 2:14 PM CDT | Special Weather Statement | TSA | 31 min |
| Jul 13, 2:16 PM CDT | Special Weather Statement | LZK | 44 min |
| Jul 13, 2:38 PM CDT | Severe Thunderstorm Warning | TSA | 26 min |
| Jul 22, 3:47 PM CDT | Special Weather Statement | TSA | 28 min |
| Jul 23, 7:15 PM CDT | Special Weather Statement | TSA | 30 min |
| Jul 30, 12:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 3, 2:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 4, 4:45 AM CDT | Special Weather Statement | TSA | 30 min |
| Aug 4, 1:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Aug 4, 7:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Aug 4, 8:52 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Aug 8, 2:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 8, 7:34 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 8, 7:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 10:55 PM CDT | Special Weather Statement | TSA | 35 min |
| Aug 8, 11:00 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 2:21 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 10, 2:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Aug 10, 3:15 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 4:33 AM CDT | Severe Thunderstorm Warning | TSA | 57 min |
| Aug 10, 4:50 AM CDT | Severe Thunderstorm Warning | TSA | 55 min |
| Aug 10, 5:24 AM CDT | Flash Flood Warning | TSA | 4 hr |
| Aug 10, 5:38 AM CDT | Severe Thunderstorm Warning | TSA | 37 min |
| Aug 10, 7:23 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Aug 11, 2:13 PM CDT | Special Weather Statement | TSA | 62 min |
| Aug 12, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 12, 6:47 PM CDT | Special Weather Statement | TSA | 28 min |
| Aug 12, 7:04 PM CDT | Severe Thunderstorm Warning | TSA | 26 min |
| Aug 20, 3:56 PM CDT | Mesoscale Discussion | SPC | 64 min |
| Aug 20, 5:29 PM CDT | Special Weather Statement | TSA | 31 min |
| Sep 18, 2:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 18, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 18, 5:28 PM CDT | Severe Thunderstorm Warning | TSA | 62 min |
| Sep 18, 6:11 PM CDT | Special Weather Statement | TSA | 49 min |
| Sep 18, 6:48 PM CDT | Mesoscale Discussion | SPC | 57 min |
| Oct 17, 9:44 PM CDT | Special Weather Statement | TSA | 46 min |
| Oct 17, 10:31 PM CDT | Special Weather Statement | TSA | 44 min |
| Oct 22, 9:17 PM CDT | Special Weather Statement | TSA | 58 min |
| Oct 22, 9:45 PM CDT | Severe Thunderstorm Warning | TSA | 60 min |
| Nov 8, 1:17 AM CST | Mesoscale Discussion | SPC | 118 min |
| Nov 8, 9:38 AM CST | Mesoscale Discussion | SPC | 67 min |
| Nov 8, 10:02 AM CST | Severe Thunderstorm Warning | TSA | 43 min |
| Nov 8, 10:31 AM CST | Mesoscale Discussion | SPC | 29 min |
| Nov 8, 10:43 AM CST | Severe Thunderstorm Warning | TSA | 47 min |
| Nov 8, 10:49 AM CST | Tornado Watch | SPC | 7 hr |
| Nov 8, 10:51 AM CST | Special Weather Statement | TSA | 54 min |
| Nov 8, 4:28 PM CST | Areal Flood Warning | TSA | 6 hr |
| Nov 20, 8:02 PM CST | Mesoscale Discussion | SPC | 58 min |
| Nov 21, 10:30 PM CST | Areal Flood Advisory | TSA | 2 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 | 48 |
| Tornado Warning | 11 |
| Severe Thunderstorm Watch | 16 |
| Tornado Watch | 15 |
| Mesoscale Discussion | 65 |
| Special Weather Statement | 38 |
| Flooding | |
| Areal Flood Warning | 11 |
| Flash Flood Warning | 9 |
| River Flood Warning | 2 |
| Areal Flood Advisory | 7 |
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.