Alert archive / South Dakota / Todd County
Weather alerts in Todd County, South Dakota, 2008
132 weather alerts in 2008, 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 2008. Tap one for its archive.
- Alerts
- 132
- Warnings
- 36
- Watches
- 31
- Advisories
- 29
- Busiest month
- June41 alerts
- Busiest day
- June 26, 20087 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Todd County, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 27 | 15 | 44% | 10 | 70% | 20 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2008
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 20 | 8 | 60% | 11 | 73% | 15 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 496 | 269 | 46% | 410 | 90% | 28 min |
| NWS Rapid City, SD: flash flood warnings | 13 | 1 | 92% | 2 | 50% | 93 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 19, 3:56 PM CST | Winter Weather Advisory | UNR | 44 hr |
| Jan 21, 3:48 PM CST | Wind Chill Advisory | UNR | 18 hr |
| Jan 22, 3:54 PM CST | Blowing Snow Advisory | UNR | 19 hr |
| Jan 28, 4:35 AM CST | Winter Weather Advisory | UNR | 23 hr |
| Jan 28, 3:46 PM CST | Wind Chill Advisory | UNR | 26 hr |
| Feb 10, 4:23 PM CST | Winter Weather Advisory | UNR | 26 hr |
| Feb 16, 3:53 PM CST | Wind Advisory | UNR | 28 hr |
| Mar 1, 3:53 PM CST | Wind Advisory | UNR | 28 hr |
| Mar 15, 3:35 PM CDT | Snow Advisory | UNR | 23 hr |
| Mar 29, 5:01 AM CDT | Wind Advisory | UNR | 11 hr |
| Mar 29, 3:56 PM CDT | Winter Storm Watch | UNR | 37 hr |
| Mar 30, 12:45 PM CDT | Winter Storm Warning | UNR | 24 hr |
| Apr 8, 3:43 AM CDT | Winter Storm Watch | UNR | 49 hr |
| Apr 10, 4:16 AM CDT | Blizzard Warning | UNR | 32 hr |
| Apr 10, 2:14 PM CDT | Mesoscale Discussion | SPC | 4 hr |
| Apr 11, 5:11 AM CDT | Blowing Snow Advisory | UNR | 14 hr |
| Apr 14, 4:11 PM CDT | Wind Advisory | UNR | 27 hr |
| Apr 20, 4:29 AM CDT | Wind Advisory | UNR | 11 hr |
| Apr 23, 5:38 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 23, 6:48 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 23, 10:32 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 6, 10:39 AM CDT | Severe Thunderstorm Warning | UNR | 66 min |
| May 6, 10:56 AM CDT | Mesoscale Discussion | SPC | 94 min |
| May 10, 4:26 AM CDT | Wind Advisory | UNR | 11 hr |
| May 22, 3:36 PM CDT | Flood Watch | UNR | 42 hr |
| May 23, 6:19 PM CDT | Wind Advisory | UNR | 4 hr |
| May 24, 1:18 PM CDT | Mesoscale Discussion | SPC | 57 min |
| May 24, 2:07 PM CDT | Severe Thunderstorm Warning | UNR | 38 min |
| May 24, 2:39 PM CDT | Tornado Watch | SPC | 7 hr |
| May 28, 11:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| May 29, 1:33 PM CDT | Tornado Watch | SPC | 7 hr |
| May 29, 6:57 PM CDT | Severe Thunderstorm Warning | UNR | 51 min |
| Jun 1, 3:29 PM CDT | Tornado Watch | SPC | 8 hr |
| Jun 1, 4:21 PM CDT | Severe Thunderstorm Warning | UNR | 51 min |
| Jun 1, 5:23 PM CDT | Severe Thunderstorm Warning | UNR | 97 min |
| Jun 1, 9:46 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 2, 7:33 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 2, 10:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 2, 10:11 PM CDT | Severe Thunderstorm Warning | UNR | 61 min |
| Jun 3, 2:38 AM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 3, 2:53 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 3, 6:24 AM CDT | Mesoscale Discussion | SPC | 36 min |
| Jun 4, 4:22 AM CDT | Flood Watch | UNR | 40 hr |
| Jun 4, 11:52 PM CDT | Areal Flood Advisory | UNR | 18 hr |
| Jun 5, 10:11 AM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 5, 11:38 AM CDT | Severe Thunderstorm Warning | UNR | 34 min |
| Jun 5, 5:25 PM CDT | Areal Flood Warning | UNR | 48 hr |
| Jun 9, 3:01 PM CDT | Flood Watch | UNR | 40 hr |
| Jun 10, 8:06 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 17, 7:47 AM CDT | Severe Thunderstorm Warning | UNR | 58 min |
| Jun 17, 8:46 AM CDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jun 17, 1:40 PM CDT | Mesoscale Discussion | SPC | 65 min |
| Jun 17, 4:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 7:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 18, 1:19 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 18, 2:19 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 18, 6:29 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 5:03 PM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Jun 23, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 23, 7:50 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Jun 25, 1:36 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jun 25, 8:10 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jun 25, 8:31 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 25, 11:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 26, 5:43 AM CDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jun 26, 5:55 AM CDT | Severe Thunderstorm Warning | UNR | 65 min |
| Jun 26, 6:39 AM CDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 26, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 26, 7:14 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 26, 8:53 PM CDT | Severe Thunderstorm Warning | UNR | 67 min |
| Jun 26, 11:03 PM CDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jun 26, 11:50 PM CDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jun 28, 4:05 AM CDT | Wind Advisory | UNR | 12 hr |
| Jul 6, 3:17 AM CDT | Severe Thunderstorm Warning | UNR | 29 min |
| Jul 15, 8:04 PM CDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jul 16, 4:50 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 16, 5:51 PM CDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jul 16, 6:34 PM CDT | Severe Thunderstorm Warning | UNR | 34 min |
| Jul 16, 7:50 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 16, 11:54 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 18, 8:01 AM CDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jul 18, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 18, 8:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 18, 10:38 PM CDT | Severe Thunderstorm Warning | UNR | 51 min |
| Jul 18, 11:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 20, 5:22 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 20, 7:58 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 24, 9:35 AM CDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 24, 10:47 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 24, 3:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 7:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 24, 9:08 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 24, 10:03 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 24, 10:24 PM CDT | Severe Thunderstorm Warning | UNR | 27 min |
| Jul 26, 8:51 PM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 26, 9:02 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 26, 11:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 30, 5:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 30, 6:41 PM CDT | Severe Thunderstorm Warning | UNR | 64 min |
| Aug 5, 9:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 1:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Aug 11, 2:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 11, 3:06 PM CDT | Severe Thunderstorm Warning | UNR | 54 min |
| Aug 11, 4:54 PM CDT | Severe Thunderstorm Warning | UNR | 96 min |
| Aug 13, 6:49 PM CDT | Severe Thunderstorm Warning | UNR | 71 min |
| Aug 26, 4:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 26, 7:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 30, 5:10 AM CDT | Wind Advisory | UNR | 40 hr |
| Sep 22, 5:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 22, 8:27 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Oct 4, 4:53 AM CDT | Wind Advisory | UNR | 16 hr |
| Oct 22, 4:41 AM CDT | Wind Advisory | UNR | 14 hr |
| Oct 25, 3:31 PM CDT | High Wind Watch | UNR | 12 hr |
| Oct 26, 3:30 AM CDT | High Wind Warning | UNR | 16 hr |
| Nov 4, 3:35 AM CST | Winter Storm Watch | UNR | 32 hr |
| Nov 5, 3:25 AM CST | Blizzard Warning | UNR | 57 hr |
| Nov 5, 11:09 AM CST | Winter Weather Advisory | UNR | 31 hr |
| Nov 10, 3:17 PM CST | Winter Weather Advisory | UNR | 18 hr |
| Nov 12, 4:24 AM CST | High Wind Watch | UNR | 35 hr |
| Nov 13, 3:26 PM CST | Wind Advisory | UNR | 27 hr |
| Nov 14, 2:17 PM CST | Mesoscale Discussion | SPC | 58 min |
| Dec 2, 5:05 AM CST | Winter Weather Advisory | UNR | 23 hr |
| Dec 7, 4:12 PM CST | Winter Weather Advisory | UNR | 23 hr |
| Dec 12, 5:27 AM CST | Blizzard Watch | UNR | 23 hr |
| Dec 13, 4:56 AM CST | Blizzard Warning | UNR | 33 hr |
| Dec 14, 9:53 AM CST | Wind Chill Warning | UNR | 26 hr |
| Dec 15, 11:59 AM CST | Wind Chill Advisory | UNR | 9 hr |
| Dec 19, 3:34 PM CST | Wind Chill Warning | UNR | 44 hr |
| Dec 19, 3:34 PM CST | Wind Chill Advisory | UNR | 26 hr |
| Dec 21, 3:05 PM CST | Wind Chill Advisory | UNR | 20 hr |
| Dec 29, 2:58 PM CST | Wind Advisory | UNR | 26 hr |
| Dec 29, 9:05 PM CST | High Wind Warning | UNR | 20 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20072009
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.