Alert archive / South Dakota / Todd County
Weather alerts in Todd County, South Dakota, 2015
111 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Todd County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 111
- Warnings
- 28
- Watches
- 13
- Advisories
- 29
- Busiest month
- July28 alerts
- Busiest day
- July 5, 20158 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 Todd County in 2015 had a tornado report inside them.
Todd County, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 19 | 12 | 37% | 5 | 80% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 16 | 5 | 69% | 11 | 64% | 14 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 307 | 238 | 22% | 460 | 88% | 26 min |
| NWS Rapid City, SD: flash flood warnings | 18 | 9 | 50% | 13 | 92% | 99 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 3, 4:16 AM CST | Wind Advisory | UNR | 12 hr |
| Jan 3, 6:11 PM CST | Wind Chill Advisory | UNR | 16 hr |
| Jan 6, 3:58 AM CST | Wind Chill Advisory | UNR | 31 hr |
| Jan 7, 3:40 PM CST | Winter Weather Advisory | UNR | 29 hr |
| Jan 8, 8:37 PM CST | Wind Chill Advisory | UNR | 15 hr |
| Jan 16, 3:05 PM CST | Wind Advisory | UNR | 24 hr |
| Jan 23, 3:32 PM CST | Wind Advisory | UNR | 28 hr |
| Jan 27, 2:55 PM CST | Wind Advisory | UNR | 33 hr |
| Jan 31, 9:54 AM CST | Winter Weather Advisory | UNR | 20 hr |
| Feb 9, 1:10 AM CST | Dense Fog Advisory | UNR | 10 hr |
| Mar 1, 10:23 PM CST | Winter Storm Watch | UNR | 16 hr |
| Mar 2, 2:29 PM CST | Winter Storm Warning | UNR | 21 hr |
| Mar 28, 3:57 AM CDT | Wind Advisory | UNR | 31 hr |
| Apr 14, 10:52 AM CDT | Wind Advisory | UNR | 18 hr |
| Apr 19, 4:20 AM CDT | Wind Advisory | UNR | 16 hr |
| May 2, 5:41 PM CDT | Special Weather Statement | UNR | 49 min |
| May 2, 5:52 PM CDT | Severe Thunderstorm Warning | UNR | 53 min |
| May 2, 6:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| May 10, 4:30 AM CDT | Winter Weather Advisory | UNR | 15 hr |
| May 15, 5:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| May 18, 3:51 AM CDT | Freeze Warning | UNR | 28 hr |
| May 20, 3:32 PM CDT | Frost Advisory | UNR | 16 hr |
| Jun 2, 3:44 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 2, 6:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 2, 7:49 PM CDT | Special Weather Statement | UNR | 41 min |
| Jun 2, 7:58 PM CDT | Severe Thunderstorm Warning | UNR | 17 min |
| Jun 2, 8:44 PM CDT | Special Weather Statement | UNR | 31 min |
| Jun 2, 9:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 2, 9:10 PM CDT | Severe Thunderstorm Warning | UNR | 35 min |
| Jun 2, 9:44 PM CDT | Special Weather Statement | UNR | 31 min |
| Jun 6, 5:16 PM CDT | Special Weather Statement | UNR | 59 min |
| Jun 6, 5:53 PM CDT | Severe Thunderstorm Warning | UNR | 52 min |
| Jun 6, 6:06 PM CDT | Severe Thunderstorm Warning | UNR | 39 min |
| Jun 14, 7:34 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 4:49 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 16, 7:34 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Jun 16, 8:26 PM CDT | Severe Thunderstorm Warning | UNR | 38 min |
| Jun 17, 6:39 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 18, 2:26 AM CDT | Special Weather Statement | UNR | 49 min |
| Jun 19, 10:57 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 21, 1:05 AM CDT | Mesoscale Discussion | SPC | 85 min |
| Jun 22, 3:15 AM CDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 24, 12:50 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 24, 5:19 AM CDT | Mesoscale Discussion | SPC | 56 min |
| Jul 4, 7:37 PM CDT | Severe Thunderstorm Warning | UNR | 83 min |
| Jul 4, 8:05 PM CDT | Tornado Warning | UNR | 40 min |
| Jul 4, 8:36 PM CDT | Severe Thunderstorm Warning | UNR | 84 min |
| Jul 4, 10:51 PM CDT | Areal Flood Advisory | UNR | 12 hr |
| Jul 5, 3:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 5, 4:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 6:19 PM CDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jul 5, 6:36 PM CDT | Severe Thunderstorm Warning | UNR | 84 min |
| Jul 5, 7:03 PM CDT | Severe Thunderstorm Warning | UNR | 72 min |
| Jul 5, 7:49 PM CDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jul 5, 8:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 10, 4:36 PM CDT | Special Weather Statement | UNR | 39 min |
| Jul 10, 5:20 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 17, 3:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 17, 4:03 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 6:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 19, 5:40 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 19, 6:41 PM CDT | Special Weather Statement | UNR | 34 min |
| Jul 19, 7:06 PM CDT | Severe Thunderstorm Warning | UNR | 39 min |
| Jul 19, 7:43 PM CDT | Special Weather Statement | UNR | 32 min |
| Jul 19, 8:02 PM CDT | Severe Thunderstorm Warning | UNR | 43 min |
| Jul 26, 4:20 PM CDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 26, 5:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 26, 5:35 PM CDT | Special Weather Statement | UNR | 40 min |
| Jul 26, 6:18 PM CDT | Special Weather Statement | UNR | 42 min |
| Jul 27, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 9:43 PM CDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 27, 11:36 PM CDT | Severe Thunderstorm Warning | UNR | 69 min |
| Aug 1, 4:27 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 1, 11:45 AM CDT | Special Weather Statement | UNR | 45 min |
| Aug 3, 4:05 AM CDT | Special Weather Statement | UNR | 40 min |
| Aug 3, 11:27 PM CDT | Special Weather Statement | UNR | 48 min |
| Aug 7, 4:34 PM CDT | Special Weather Statement | LBF | 26 min |
| Aug 9, 1:23 AM CDT | Severe Thunderstorm Warning | UNR | 84 min |
| Aug 9, 1:42 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 9, 4:03 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Aug 13, 8:35 PM CDT | Special Weather Statement | UNR | 25 min |
| Aug 14, 3:34 PM CDT | Heat Advisory | UNR | 27 hr |
| Aug 15, 7:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 15, 7:57 PM CDT | Special Weather Statement | LBF | 48 min |
| Aug 15, 8:48 PM CDT | Special Weather Statement | LBF | 42 min |
| Aug 21, 3:33 PM CDT | Wind Advisory | UNR | 30 hr |
| Aug 27, 2:37 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Sep 7, 5:46 PM CDT | Mesoscale Discussion | SPC | 119 min |
| Sep 22, 10:27 PM CDT | Special Weather Statement | UNR | 48 min |
| Sep 23, 8:31 PM CDT | Areal Flood Warning | UNR | 24 hr |
| Oct 10, 3:32 PM CDT | Wind Advisory | UNR | 45 hr |
| Oct 15, 4:47 AM CDT | Freeze Warning | UNR | 29 hr |
| Oct 27, 3:50 PM CDT | Wind Advisory | UNR | 27 hr |
| Nov 10, 3:20 PM CST | Wind Advisory | UNR | 48 hr |
| Nov 11, 3:02 AM CST | Wind Advisory | UNR | 16 hr |
| Nov 16, 3:46 PM CST | Winter Weather Advisory | UNR | 15 hr |
| Nov 17, 3:57 AM CST | High Wind Warning | UNR | 40 hr |
| Nov 18, 7:31 PM CST | Wind Advisory | UNR | 11 hr |
| Nov 19, 3:37 PM CST | Winter Weather Advisory | UNR | 29 hr |
| Nov 29, 4:20 AM CST | Winter Storm Watch | UNR | 11 hr |
| Nov 29, 2:58 PM CST | Winter Weather Advisory | UNR | 51 hr |
| Nov 30, 12:05 PM CST | Winter Storm Warning | UNR | 21 hr |
| Dec 12, 3:11 AM CST | Winter Weather Advisory | UNR | 19 hr |
| Dec 13, 4:12 AM CST | Winter Storm Watch | UNR | 35 hr |
| Dec 13, 6:17 PM CST | Dense Fog Advisory | UNR | 16 hr |
| Dec 14, 4:13 AM CST | Winter Storm Warning | UNR | 55 hr |
| Dec 14, 3:20 PM CST | Winter Weather Advisory | UNR | 53 hr |
| Dec 15, 11:48 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 23, 3:23 PM CST | Winter Storm Watch | UNR | 24 hr |
| Dec 24, 3:22 PM CST | Winter Storm Warning | UNR | 50 hr |
| Dec 25, 5:35 PM CST | Mesoscale Discussion | SPC | 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 | 19 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 22 |
| Special Weather Statement | 19 |
| Flooding | |
| Areal Flood Warning | 1 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 4 |
| Winter Weather Advisory | 8 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 13 |
| 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 archive20142016
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.