Alert archive / South Dakota / Butte County
Weather alerts in Butte County, South Dakota, 2015
130 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Butte County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 130
- Warnings
- 39
- Watches
- 18
- Advisories
- 35
- Busiest month
- June48 alerts
- Busiest day
- June 20, 201513 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 Butte County in 2015 had a tornado report inside them.
Butte 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 | 26 | 24 | 8% | 20 | 95% | 22 min |
| Flash flood warnings | 2 | 1 | 50% | 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 3, 3:16 AM MST | Wind Advisory | UNR | 12 hr |
| Jan 4, 2:38 PM MST | Winter Weather Advisory | UNR | 29 hr |
| Jan 6, 2:58 AM MST | Wind Chill Advisory | UNR | 31 hr |
| Jan 7, 2:40 PM MST | Winter Weather Advisory | UNR | 29 hr |
| Jan 8, 7:37 PM MST | Wind Chill Advisory | UNR | 15 hr |
| Jan 16, 2:05 PM MST | Wind Advisory | UNR | 24 hr |
| Jan 23, 2:32 PM MST | Wind Advisory | UNR | 28 hr |
| Jan 24, 2:46 AM MST | High Wind Warning | UNR | 16 hr |
| Jan 27, 1:55 PM MST | Wind Advisory | UNR | 33 hr |
| Jan 31, 5:02 PM MST | Freezing Rain Advisory | UNR | 4 hr |
| Feb 9, 12:10 AM MST | Dense Fog Advisory | UNR | 10 hr |
| Feb 10, 2:39 AM MST | Wind Advisory | UNR | 17 hr |
| Feb 17, 3:41 AM MST | Wind Advisory | UNR | 14 hr |
| Mar 2, 2:50 AM MST | Winter Weather Advisory | UNR | 36 hr |
| Mar 3, 2:22 PM MST | Wind Chill Advisory | UNR | 18 hr |
| Mar 24, 2:36 AM MDT | Wind Advisory | UNR | 14 hr |
| Mar 27, 2:19 PM MDT | High Wind Watch | UNR | 13 hr |
| Mar 28, 2:57 AM MDT | High Wind Warning | UNR | 30 hr |
| Mar 31, 2:21 PM MDT | Wind Advisory | UNR | 29 hr |
| Apr 2, 4:03 AM MDT | Wind Advisory | UNR | 14 hr |
| Apr 11, 2:50 PM MDT | Wind Advisory | UNR | 28 hr |
| Apr 14, 9:52 AM MDT | Wind Advisory | UNR | 18 hr |
| Apr 19, 3:20 AM MDT | Wind Advisory | UNR | 16 hr |
| May 7, 2:45 PM MDT | Winter Storm Watch | UNR | 37 hr |
| May 8, 1:55 PM MDT | Winter Storm Warning | UNR | 52 hr |
| May 9, 2:41 PM MDT | Blizzard Warning | UNR | 24 hr |
| May 17, 11:34 AM MDT | Wind Advisory | UNR | 10 hr |
| May 18, 2:51 AM MDT | Frost Advisory | UNR | 28 hr |
| May 20, 2:32 PM MDT | Frost Advisory | UNR | 16 hr |
| Jun 1, 2:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 9:13 PM MDT | Severe Thunderstorm Warning | UNR | 44 min |
| Jun 5, 9:26 AM MDT | Flash Flood Watch | UNR | 18 hr |
| Jun 5, 4:39 PM MDT | Flash Flood Warning | UNR | 3 hr |
| Jun 10, 3:52 AM MDT | Flash Flood Watch | UNR | 38 hr |
| Jun 13, 11:49 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 14, 1:14 AM MDT | Special Weather Statement | UNR | 46 min |
| Jun 14, 1:56 AM MDT | Special Weather Statement | UNR | 49 min |
| Jun 17, 5:39 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 17, 6:44 PM MDT | Mesoscale Discussion | SPC | 61 min |
| Jun 17, 8:43 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jun 19, 1:31 AM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jun 19, 2:28 AM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 19, 4:55 AM MDT | Special Weather Statement | UNR | 50 min |
| Jun 19, 2:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 19, 2:51 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 19, 6:15 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 19, 6:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 19, 7:12 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jun 19, 7:34 PM MDT | Flash Flood Warning | UNR | 3 hr |
| Jun 19, 7:41 PM MDT | Tornado Warning | UNR | 29 min |
| Jun 19, 8:09 PM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 19, 8:15 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 19, 8:30 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 19, 8:44 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| Jun 19, 8:49 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Jun 19, 9:13 PM MDT | Severe Thunderstorm Warning | UNR | 44 min |
| Jun 20, 2:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 20, 5:45 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 21, 4:24 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jun 21, 4:57 PM MDT | Tornado Watch | SPC | 5 hr |
| Jun 21, 7:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 21, 9:41 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 10:25 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 21, 10:53 PM MDT | Severe Thunderstorm Warning | UNR | 52 min |
| Jun 21, 11:16 PM MDT | Severe Thunderstorm Warning | UNR | 44 min |
| Jun 21, 11:25 PM MDT | Severe Thunderstorm Warning | UNR | 35 min |
| Jun 21, 11:56 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jun 23, 11:50 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 23, 11:55 PM MDT | Mesoscale Discussion | SPC | 35 min |
| Jun 24, 2:23 AM MDT | Mesoscale Discussion | SPC | 97 min |
| Jun 24, 12:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 24, 12:45 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jun 25, 6:46 AM MDT | Mesoscale Discussion | SPC | 89 min |
| Jun 29, 1:16 AM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jun 29, 2:12 AM MDT | Special Weather Statement | UNR | 48 min |
| Jun 30, 2:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 30, 4:29 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 30, 6:55 PM MDT | Mesoscale Discussion | SPC | 95 min |
| Jun 30, 8:13 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jul 1, 6:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Jul 7, 2:40 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 8:42 PM MDT | Severe Thunderstorm Warning | UNR | 48 min |
| Jul 25, 2:56 AM MDT | Special Weather Statement | UNR | 49 min |
| Jul 26, 7:30 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| Jul 27, 2:46 AM MDT | High Wind Watch | UNR | 24 hr |
| Jul 27, 2:33 PM MDT | Severe Thunderstorm Warning | UNR | 57 min |
| Jul 27, 2:50 PM MDT | Mesoscale Discussion | SPC | 85 min |
| Jul 27, 2:58 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 27, 3:26 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jul 27, 3:57 PM MDT | Severe Thunderstorm Warning | UNR | 33 min |
| Jul 27, 5:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 27, 6:09 PM MDT | Severe Thunderstorm Warning | UNR | 51 min |
| Jul 27, 8:19 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 28, 2:39 AM MDT | High Wind Warning | UNR | 16 hr |
| Aug 3, 1:50 PM MDT | Flash Flood Watch | UNR | 31 hr |
| Aug 4, 7:55 PM MDT | Special Weather Statement | UNR | 50 min |
| Aug 4, 8:28 PM MDT | Special Weather Statement | UNR | 47 min |
| Aug 8, 2:18 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 8, 3:05 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 8, 6:54 PM MDT | Special Weather Statement | UNR | 36 min |
| Aug 8, 7:05 PM MDT | Special Weather Statement | UNR | 25 min |
| Aug 8, 7:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Aug 8, 7:16 PM MDT | Severe Thunderstorm Warning | UNR | 44 min |
| Aug 9, 4:32 PM MDT | Special Weather Statement | UNR | 28 min |
| Aug 12, 3:46 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Aug 17, 6:02 PM MDT | Special Weather Statement | UNR | 58 min |
| Aug 17, 6:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 17, 7:18 PM MDT | Special Weather Statement | UNR | 27 min |
| Aug 21, 3:02 AM MDT | High Wind Watch | UNR | 12 hr |
| Aug 21, 2:33 PM MDT | High Wind Warning | UNR | 30 hr |
| Aug 27, 5:16 PM MDT | Special Weather Statement | UNR | 44 min |
| Sep 5, 6:00 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Oct 1, 2:12 PM MDT | Wind Advisory | UNR | 31 hr |
| Oct 10, 2:32 PM MDT | Wind Advisory | UNR | 45 hr |
| Oct 11, 3:39 AM MDT | High Wind Warning | UNR | 26 hr |
| Oct 15, 3:47 AM MDT | Freeze Warning | UNR | 29 hr |
| Oct 27, 2:50 PM MDT | Wind Advisory | UNR | 27 hr |
| Nov 10, 2:20 PM MST | Wind Advisory | UNR | 48 hr |
| Nov 16, 2:54 PM MST | High Wind Watch | UNR | 24 hr |
| Nov 17, 2:57 AM MST | High Wind Warning | UNR | 40 hr |
| Nov 18, 6:31 PM MST | Wind Advisory | UNR | 11 hr |
| Nov 29, 1:58 PM MST | Winter Weather Advisory | UNR | 51 hr |
| Dec 7, 2:10 PM MST | Wind Advisory | UNR | 24 hr |
| Dec 9, 3:36 AM MST | Wind Advisory | UNR | 34 hr |
| Dec 13, 3:12 AM MST | Winter Storm Watch | UNR | 35 hr |
| Dec 13, 5:17 PM MST | Dense Fog Advisory | UNR | 16 hr |
| Dec 14, 3:13 AM MST | Winter Storm Warning | UNR | 55 hr |
| Dec 14, 2:20 PM MST | Winter Weather Advisory | UNR | 53 hr |
| Dec 14, 6:28 PM MST | Freezing Fog Advisory | UNR | 11 hr |
| Dec 24, 2:22 PM MST | Winter Weather Advisory | UNR | 44 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 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.