Alert archive / South Dakota / Roberts County
Weather alerts in Roberts County, South Dakota, 2016
143 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Roberts County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 143
- Warnings
- 43
- Watches
- 22
- Advisories
- 35
- Busiest month
- July44 alerts
- Busiest day
- August 10, 201612 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Roberts County in 2016 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 5 minutes after it went out.
Roberts County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 100% | 5 min |
| Severe thunderstorm warnings | 26 | 17 | 35% | 10 | 100% | 16 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 16 | 4 | 75% | 14 | 36% | 8 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 291 | 186 | 36% | 362 | 83% | 22 min |
| NWS Aberdeen, SD: flash flood warnings | 7 | 3 | 57% | 7 | 57% | 36 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, 9:23 PM CST | Dense Fog Advisory | ABR | 9 hr |
| Jan 6, 12:01 PM CST | Winter Weather Advisory | ABR | 5 hr |
| Jan 6, 8:38 PM CST | Winter Weather Advisory | ABR | 17 hr |
| Jan 9, 3:49 AM CST | Wind Chill Advisory | ABR | 29 hr |
| Jan 11, 2:42 PM CST | Wind Chill Advisory | ABR | 19 hr |
| Jan 15, 3:09 AM CST | Wind Chill Advisory | ABR | 39 hr |
| Jan 16, 2:55 AM CST | Wind Chill Warning | ABR | 31 hr |
| Jan 16, 2:55 AM CST | Wind Chill Advisory | ABR | 48 hr |
| Feb 5, 3:07 PM CST | Blizzard Watch | ABR | 24 hr |
| Feb 6, 3:05 PM CST | Blizzard Warning | ABR | 24 hr |
| Feb 7, 2:54 PM CST | Winter Weather Advisory | ABR | 27 hr |
| Feb 12, 3:14 PM CST | Winter Storm Watch | ABR | 12 hr |
| Feb 12, 3:14 PM CST | Winter Weather Advisory | ABR | 42 hr |
| Feb 18, 2:02 PM CST | Wind Advisory | ABR | 25 hr |
| Mar 4, 5:34 AM CST | Freezing Rain Advisory | ABR | 4 hr |
| Mar 5, 2:40 PM CST | Wind Advisory | ABR | 18 hr |
| Mar 13, 8:58 AM CDT | Dense Fog Advisory | ABR | 3 hr |
| Mar 14, 12:38 AM CDT | Dense Fog Advisory | ABR | 11 hr |
| Apr 5, 3:15 AM CDT | Wind Advisory | ABR | 31 hr |
| Apr 9, 2:42 AM CDT | Wind Advisory | ABR | 15 hr |
| Apr 20, 3:24 AM CDT | Dense Fog Advisory | ABR | 7 hr |
| Apr 24, 5:24 PM CDT | Special Weather Statement | ABR | 51 min |
| May 13, 3:04 AM CDT | Freeze Warning | ABR | 30 hr |
| May 14, 11:33 AM CDT | Frost Advisory | ABR | 21 hr |
| May 22, 7:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| May 30, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 30, 6:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 12, 2:12 PM CDT | Severe Thunderstorm Warning | ABR | 48 min |
| Jun 12, 2:27 PM CDT | Severe Thunderstorm Warning | ABR | 63 min |
| Jun 12, 2:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jun 12, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 14, 2:33 PM CDT | Tornado Watch | SPC | 5 hr |
| Jun 14, 3:18 PM CDT | Tornado Warning | ABR | 27 min |
| Jun 14, 4:15 PM CDT | Tornado Warning | ABR | 30 min |
| Jun 18, 3:20 AM CDT | Heat Advisory | ABR | 41 hr |
| Jun 19, 5:33 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 4, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 5:35 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Jul 4, 8:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 4, 10:39 PM CDT | Severe Thunderstorm Warning | ABR | 39 min |
| Jul 5, 4:07 AM CDT | Special Weather Statement | ABR | 23 min |
| Jul 5, 4:26 AM CDT | Severe Thunderstorm Warning | ABR | 34 min |
| Jul 5, 2:06 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 5, 5:08 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 9, 3:04 PM CDT | Heat Advisory | ABR | 28 hr |
| Jul 9, 10:44 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 9, 11:36 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 10, 1:23 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 10, 1:24 AM CDT | Severe Thunderstorm Warning | ABR | 51 min |
| Jul 10, 1:58 AM CDT | Severe Thunderstorm Warning | ABR | 32 min |
| Jul 10, 2:14 AM CDT | Special Weather Statement | ABR | 31 min |
| Jul 10, 10:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 10, 10:40 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 11, 1:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 11, 2:06 AM CDT | Special Weather Statement | ABR | 24 min |
| Jul 11, 4:06 AM CDT | Mesoscale Discussion | SPC | 84 min |
| Jul 11, 6:42 AM CDT | Areal Flood Warning | ABR | 6 hr |
| Jul 11, 9:09 AM CDT | Areal Flood Warning | ABR | 9 hr |
| Jul 11, 12:32 PM CDT | Special Weather Statement | ABR | 43 min |
| Jul 11, 9:32 PM CDT | Special Weather Statement | ABR | 43 min |
| Jul 16, 12:27 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 16, 1:09 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 3:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 16, 4:15 PM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jul 16, 4:51 PM CDT | Severe Thunderstorm Warning | ABR | 39 min |
| Jul 16, 5:09 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 16, 5:15 PM CDT | Severe Thunderstorm Warning | ABR | 45 min |
| Jul 16, 5:30 PM CDT | Severe Thunderstorm Warning | ABR | 21 min |
| Jul 16, 6:29 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Jul 16, 6:57 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 6:59 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Jul 16, 7:33 PM CDT | Severe Thunderstorm Warning | ABR | 27 min |
| Jul 16, 10:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 18, 3:45 AM CDT | Excessive Heat Watch | ABR | 24 hr |
| Jul 19, 3:35 AM CDT | Excessive Heat Warning | ABR | 4 days |
| Jul 23, 1:41 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 3:54 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 23, 8:11 PM CDT | Special Weather Statement | ABR | 34 min |
| Jul 27, 12:23 AM CDT | Special Weather Statement | ABR | 52 min |
| Jul 27, 4:30 AM CDT | Areal Flood Warning | ABR | 6 hr |
| Aug 1, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 1, 6:42 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 1, 9:45 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 1, 9:54 PM CDT | Special Weather Statement | ABR | 51 min |
| Aug 1, 9:59 PM CDT | Severe Thunderstorm Warning | ABR | 13 min |
| Aug 1, 11:54 PM CDT | Severe Thunderstorm Warning | ABR | 34 min |
| Aug 3, 10:59 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 9, 10:19 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Aug 10, 1:05 AM CDT | Mesoscale Discussion | SPC | 55 min |
| Aug 10, 2:18 AM CDT | Severe Thunderstorm Warning | ABR | 57 min |
| Aug 10, 2:40 AM CDT | Tornado Warning | ABR | 35 min |
| Aug 10, 3:06 AM CDT | Severe Thunderstorm Warning | ABR | 54 min |
| Aug 10, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 10, 3:45 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 10, 4:44 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Aug 10, 5:07 PM CDT | Severe Thunderstorm Warning | ABR | 38 min |
| Aug 10, 5:44 PM CDT | Severe Thunderstorm Warning | ABR | 32 min |
| Aug 10, 6:03 PM CDT | Severe Thunderstorm Warning | ABR | 42 min |
| Aug 10, 6:39 PM CDT | Severe Thunderstorm Warning | ABR | 37 min |
| Aug 10, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 10, 10:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| Aug 10, 11:29 PM CDT | Areal Flood Warning | ABR | 9 hr |
| Aug 16, 3:19 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Aug 16, 5:23 PM CDT | Special Weather Statement | ABR | 37 min |
| Aug 16, 6:14 PM CDT | Severe Thunderstorm Warning | ABR | 31 min |
| Aug 18, 7:17 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 27, 1:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Aug 28, 2:15 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 28, 3:30 AM CDT | Severe Thunderstorm Warning | ABR | 30 min |
| Aug 28, 3:58 AM CDT | Severe Thunderstorm Warning | ABR | 35 min |
| Aug 28, 4:49 AM CDT | Special Weather Statement | ABR | 41 min |
| Aug 28, 6:02 AM CDT | Severe Thunderstorm Warning | ABR | 16 min |
| Aug 28, 5:15 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Aug 29, 3:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Sep 4, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Sep 4, 6:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Sep 4, 9:16 PM CDT | Mesoscale Discussion | SPC | 59 min |
| Sep 7, 2:11 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 7, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 7, 5:44 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Oct 5, 2:37 AM CDT | Wind Advisory | ABR | 16 hr |
| Oct 6, 3:06 PM CDT | Frost Advisory | ABR | 19 hr |
| Nov 16, 3:39 AM CST | Blizzard Watch | ABR | 24 hr |
| Nov 17, 3:53 AM CST | Blizzard Warning | ABR | 38 hr |
| Nov 21, 3:26 PM CST | Winter Weather Advisory | ABR | 23 hr |
| Nov 26, 6:29 PM CST | Dense Fog Advisory | ABR | 20 hr |
| Dec 5, 3:52 AM CST | Wind Advisory | ABR | 41 hr |
| Dec 5, 4:08 AM CST | Winter Weather Advisory | ABR | 50 hr |
| Dec 6, 2:17 AM CST | High Wind Warning | ABR | 4 hr |
| Dec 10, 2:05 PM CST | Winter Weather Advisory | ABR | 17 hr |
| Dec 12, 3:50 PM CST | Wind Chill Advisory | ABR | 18 hr |
| Dec 14, 2:43 AM CST | Wind Chill Advisory | ABR | 30 hr |
| Dec 15, 2:49 PM CST | Winter Weather Advisory | ABR | 42 hr |
| Dec 16, 3:37 AM CST | Wind Chill Warning | ABR | 56 hr |
| Dec 18, 11:54 AM CST | Wind Chill Advisory | ABR | 3 hr |
| Dec 20, 3:22 PM CST | Wind Advisory | ABR | 26 hr |
| Dec 22, 4:53 AM CST | Winter Storm Watch | ABR | 48 hr |
| Dec 23, 3:06 PM CST | Blizzard Warning | ABR | 72 hr |
| Dec 24, 4:28 AM CST | Freezing Rain Advisory | ABR | 41 hr |
| Dec 24, 9:44 PM CST | Ice Storm Warning | ABR | 29 hr |
| Dec 25, 9:36 PM CST | High Wind Warning | ABR | 11 hr |
| Dec 26, 11:57 AM CST | Wind Advisory | ABR | 6 hr |
| Dec 29, 2:09 AM CST | Wind Advisory | ABR | 12 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 archive20152017
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.