Alert archive / Oklahoma / Seminole County
Weather alerts in Seminole County, Oklahoma, 2010
134 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Seminole County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 134
- Warnings
- 39
- Watches
- 16
- Advisories
- 44
- Busiest month
- May46 alerts
- Busiest day
- May 20, 201012 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 4 tornado warnings covering Seminole County in 2010 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 12 minutes after it went out.
Seminole County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 2 | 50% | 1 | 100% | 12 min |
| Severe thunderstorm warnings | 17 | 6 | 65% | 2 | 100% | 20 min |
| Flash flood warnings | 4 | 2 | 50% | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Norman, OK: tornado warnings | 73 | 32 | 56% | 51 | 92% | 24 min |
| NWS Norman, OK: severe thunderstorm warnings | 379 | 157 | 59% | 406 | 73% | 26 min |
| NWS Norman, OK: flash flood warnings | 35 | 14 | 60% | 27 | 89% | 92 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 |
|---|---|---|---|
| Jan 6, 3:31 AM CST | Wind Chill Advisory | OUN | 3 days |
| Jan 6, 6:31 PM CST | Winter Weather Advisory | OUN | 10 hr |
| Jan 15, 3:21 AM CST | Dense Fog Advisory | OUN | 10 hr |
| Jan 15, 8:50 PM CST | Dense Fog Advisory | OUN | 12 hr |
| Jan 16, 8:06 PM CST | Dense Fog Advisory | OUN | 16 hr |
| Jan 18, 9:23 PM CST | Dense Fog Advisory | OUN | 15 hr |
| Jan 20, 6:17 PM CST | Mesoscale Discussion | SPC | 88 min |
| Jan 20, 9:20 PM CST | Mesoscale Discussion | SPC | 55 min |
| Jan 25, 11:36 AM CST | Winter Storm Watch | OUN | 63 hr |
| Jan 27, 3:50 AM CST | Winter Storm Warning | OUN | 56 hr |
| Jan 28, 3:03 AM CST | Winter Weather Advisory | OUN | 43 hr |
| Jan 28, 12:18 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 29, 11:41 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 30, 3:03 PM CST | Freezing Fog Advisory | OUN | 21 hr |
| Jan 31, 3:06 PM CST | Freezing Fog Advisory | OUN | 21 hr |
| Feb 2, 9:32 PM CST | Freezing Fog Advisory | OUN | 12 hr |
| Feb 4, 5:30 PM CST | Dense Fog Advisory | OUN | 13 hr |
| Feb 8, 3:59 AM CST | Winter Weather Advisory | OUN | 12 hr |
| Feb 10, 4:03 PM CST | Winter Weather Advisory | OUN | 30 hr |
| Feb 12, 9:10 PM CST | Dense Fog Advisory | OUN | 12 hr |
| Feb 14, 3:23 AM CST | Dense Fog Advisory | OUN | 4 hr |
| Feb 21, 10:56 AM CST | River Flood Warning | OUN | 8 hr |
| Feb 25, 11:30 AM CST | Winter Weather Advisory | OUN | 23 hr |
| Mar 17, 3:16 AM CDT | Dense Fog Advisory | OUN | 8 hr |
| Mar 18, 3:20 PM CDT | Winter Storm Watch | OUN | 37 hr |
| Mar 19, 11:45 AM CDT | Winter Storm Warning | OUN | 50 hr |
| Mar 19, 3:46 PM CDT | Winter Weather Advisory | OUN | 46 hr |
| Mar 26, 2:40 PM CDT | Wind Advisory | OUN | 28 hr |
| Apr 2, 6:17 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Apr 6, 4:50 AM CDT | Wind Advisory | OUN | 14 hr |
| Apr 6, 8:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Apr 6, 11:24 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 6, 11:37 PM CDT | Severe Thunderstorm Warning | OUN | 38 min |
| Apr 6, 11:55 PM CDT | Severe Thunderstorm Warning | OUN | 46 min |
| Apr 8, 3:27 PM CDT | Frost Advisory | OUN | 17 hr |
| May 9, 3:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 1:25 PM CDT | Tornado Watch | SPC | 9 hr |
| May 10, 4:42 PM CDT | Mesoscale Discussion | SPC | 63 min |
| May 10, 5:59 PM CDT | Severe Thunderstorm Warning | OUN | 46 min |
| May 10, 6:08 PM CDT | Tornado Warning | OUN | 67 min |
| May 10, 6:37 PM CDT | Tornado Warning | OUN | 53 min |
| May 10, 6:45 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 10, 6:51 PM CDT | Tornado Warning | OUN | 39 min |
| May 10, 7:25 PM CDT | Severe Thunderstorm Warning | OUN | 50 min |
| May 10, 7:45 PM CDT | Tornado Warning | OUN | 45 min |
| May 10, 9:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| May 13, 1:59 AM CDT | Mesoscale Discussion | SPC | 31 min |
| May 13, 2:04 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 13, 3:57 AM CDT | Severe Thunderstorm Warning | OUN | 63 min |
| May 13, 4:47 AM CDT | Severe Thunderstorm Warning | OUN | 58 min |
| May 13, 5:02 AM CDT | Mesoscale Discussion | SPC | 28 min |
| May 14, 3:55 AM CDT | Areal Flood Advisory | OUN | 3 hr |
| May 14, 6:32 AM CDT | River Flood Warning | OUN | 41 hr |
| May 14, 8:58 AM CDT | Flood Watch | OUN | 30 hr |
| May 16, 12:33 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 16, 1:28 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 16, 3:04 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 16, 5:13 PM CDT | Severe Thunderstorm Warning | OUN | 62 min |
| May 16, 6:03 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 16, 6:14 PM CDT | Severe Thunderstorm Warning | OUN | 61 min |
| May 19, 1:22 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 19, 2:06 PM CDT | Tornado Watch | SPC | 8 hr |
| May 19, 3:20 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 19, 5:30 PM CDT | Mesoscale Discussion | SPC | 60 min |
| May 19, 7:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| May 19, 7:45 PM CDT | Severe Thunderstorm Warning | OUN | 45 min |
| May 19, 8:15 PM CDT | Severe Thunderstorm Warning | OUN | 45 min |
| May 19, 8:29 PM CDT | Severe Thunderstorm Warning | OUN | 46 min |
| May 19, 8:59 PM CDT | Severe Thunderstorm Warning | OUN | 61 min |
| May 19, 9:05 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 19, 9:35 PM CDT | Tornado Watch | SPC | 4 hr |
| May 19, 10:04 PM CDT | Severe Thunderstorm Warning | OUN | 56 min |
| May 19, 11:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| May 19, 11:51 PM CDT | Areal Flood Advisory | OUN | 3 hr |
| May 20, 12:02 AM CDT | Severe Thunderstorm Warning | OUN | 43 min |
| May 20, 1:55 AM CDT | Severe Thunderstorm Warning | OUN | 50 min |
| May 30, 5:02 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 31, 2:09 AM CDT | Areal Flood Advisory | OUN | 3 hr |
| May 31, 4:51 AM CDT | Areal Flood Advisory | OUN | 114 min |
| May 31, 7:13 AM CDT | Areal Flood Advisory | OUN | 107 min |
| May 31, 7:57 AM CDT | River Flood Warning | OUN | 30 hr |
| Jun 7, 5:08 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 7, 7:27 AM CDT | Mesoscale Discussion | SPC | 63 min |
| Jun 13, 2:14 PM CDT | Flash Flood Watch | OUN | 38 hr |
| Jun 14, 3:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 14, 4:03 PM CDT | Flash Flood Warning | OUN | 3 hr |
| Jun 14, 4:15 PM CDT | Severe Thunderstorm Warning | OUN | 60 min |
| Jun 14, 6:27 PM CDT | Areal Flood Advisory | OUN | 8 hr |
| Jun 14, 6:30 PM CDT | River Flood Warning | OUN | 32 hr |
| Jun 14, 10:53 PM CDT | Flash Flood Warning | OUN | 3 hr |
| Jun 14, 11:18 PM CDT | Flash Flood Warning | OUN | 3 hr |
| Jun 28, 1:47 AM CDT | Areal Flood Advisory | OUN | 6 hr |
| Jun 28, 6:11 AM CDT | River Flood Warning | OUN | 14 hr |
| Jul 3, 12:00 PM CDT | River Flood Warning | OUN | 20 hr |
| Jul 4, 8:02 PM CDT | River Flood Warning | OUN | 14 hr |
| Jul 6, 1:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 7, 4:12 AM CDT | Flash Flood Watch | OUN | 72 hr |
| Jul 7, 2:26 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 8, 5:05 PM CDT | Areal Flood Advisory | OUN | 3 hr |
| Jul 8, 5:36 PM CDT | Areal Flood Advisory | OUN | 3 hr |
| Jul 8, 7:48 PM CDT | Areal Flood Advisory | OUN | 4 hr |
| Jul 9, 2:04 PM CDT | River Flood Warning | OUN | 18 hr |
| Jul 13, 12:27 PM CDT | Heat Advisory | OUN | 55 hr |
| Jul 14, 5:28 AM CDT | Excessive Heat Warning | OUN | 38 hr |
| Jul 16, 4:13 AM CDT | Heat Advisory | OUN | 63 hr |
| Aug 5, 12:36 PM CDT | Heat Advisory | OUN | 10 days |
| Aug 22, 4:30 AM CDT | Heat Advisory | OUN | 39 hr |
| Aug 23, 5:51 PM CDT | Severe Thunderstorm Warning | OUN | 18 min |
| Sep 2, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 2, 6:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Sep 2, 9:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Sep 7, 3:54 AM CDT | Flash Flood Watch | OUN | 48 hr |
| Sep 8, 4:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Sep 8, 8:02 PM CDT | Areal Flood Advisory | OUN | 3 hr |
| Sep 8, 9:22 PM CDT | Areal Flood Advisory | OUN | 3 hr |
| Sep 8, 9:52 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 8, 10:48 PM CDT | Flash Flood Warning | OUN | 3 hr |
| Sep 9, 12:20 AM CDT | River Flood Warning | OUN | 9 hr |
| Oct 3, 2:56 PM CDT | Frost Advisory | OUN | 18 hr |
| Oct 10, 3:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 11, 3:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Oct 22, 2:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Oct 22, 7:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Oct 25, 4:20 AM CDT | Wind Advisory | OUN | 15 hr |
| Oct 28, 4:37 AM CDT | Frost Advisory | OUN | 28 hr |
| Nov 4, 8:46 PM CDT | Frost Advisory | OUN | 12 hr |
| Nov 5, 3:03 AM CDT | Freeze Watch | OUN | 11 hr |
| Nov 5, 2:01 PM CDT | Freeze Warning | OUN | 18 hr |
| Nov 13, 2:53 PM CST | Frost Advisory | OUN | 17 hr |
| Nov 17, 2:40 PM CST | Freeze Warning | OUN | 17 hr |
| Nov 18, 3:50 PM CST | Frost Advisory | OUN | 16 hr |
| Nov 24, 6:42 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Nov 25, 7:40 AM CST | Winter Weather Advisory | OUN | 4 hr |
| Nov 25, 7:50 AM CST | Mesoscale Discussion | SPC | 3 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 | 4 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 35 |
| Flooding | |
| Flash Flood Warning | 4 |
| River Flood Warning | 9 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 12 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 7 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 4 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 6 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Freezing Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20092011
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.