Alert archive / South Dakota / Marshall County
Weather alerts in Marshall County, South Dakota, 2017
101 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Marshall County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 101
- Warnings
- 29
- Watches
- 10
- Advisories
- 36
- Busiest month
- June23 alerts
- Busiest day
- June 13, 201710 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 Marshall County in 2017 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 10 minutes after it went out.
Marshall County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 100% | 10 min |
| Severe thunderstorm warnings | 17 | 10 | 41% | 1 | 100% | 27 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Aberdeen, SD: tornado warnings | 19 | 7 | 63% | 16 | 63% | 15 min |
| NWS Aberdeen, SD: severe thunderstorm warnings | 201 | 138 | 31% | 306 | 81% | 20 min |
| NWS Aberdeen, SD: flash flood warnings | 2 | 1 | 50% | 5 | 20% | 64 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 1, 3:54 AM CST | Winter Weather Advisory | ABR | 50 hr |
| Jan 3, 11:34 AM CST | Wind Chill Advisory | ABR | 68 hr |
| Jan 9, 3:12 PM CST | Winter Weather Advisory | ABR | 26 hr |
| Jan 11, 2:40 AM CST | Wind Chill Advisory | ABR | 8 hr |
| Jan 11, 2:55 PM CST | Wind Chill Advisory | ABR | 19 hr |
| Jan 12, 2:58 AM CST | Winter Weather Advisory | ABR | 12 hr |
| Jan 12, 3:07 PM CST | Wind Chill Advisory | ABR | 16 hr |
| Jan 19, 12:34 AM CST | Dense Fog Advisory | ABR | 11 hr |
| Jan 19, 3:05 PM CST | Dense Fog Advisory | ABR | 21 hr |
| Jan 20, 3:02 PM CST | Dense Fog Advisory | ABR | 22 hr |
| Jan 21, 6:07 PM CST | Dense Fog Advisory | ABR | 18 hr |
| Jan 30, 2:48 AM CST | Wind Advisory | ABR | 15 hr |
| Feb 8, 2:32 PM CST | Wind Chill Advisory | ABR | 15 hr |
| Mar 5, 3:25 PM CST | High Wind Watch | ABR | 36 hr |
| Mar 5, 3:25 PM CST | High Wind Warning | ABR | 54 hr |
| Mar 6, 4:43 AM CST | Wind Advisory | ABR | 51 hr |
| Mar 7, 8:59 PM CST | Wind Advisory | ABR | 11 hr |
| Mar 10, 3:30 PM CST | Winter Storm Watch | ABR | 31 hr |
| Mar 11, 2:36 PM CST | Winter Weather Advisory | ABR | 33 hr |
| Mar 11, 10:38 PM CST | Winter Storm Warning | ABR | 25 hr |
| Mar 26, 5:34 AM CDT | Dense Fog Advisory | ABR | 4 hr |
| Apr 7, 9:50 AM CDT | Wind Advisory | ABR | 9 hr |
| Apr 12, 11:39 PM CDT | Dense Fog Advisory | ABR | 10 hr |
| Apr 26, 4:51 AM CDT | Winter Weather Advisory | ABR | 14 hr |
| May 16, 4:48 AM CDT | Special Weather Statement | ABR | 27 min |
| May 16, 5:00 AM CDT | Severe Thunderstorm Warning | ABR | 30 min |
| May 16, 5:32 AM CDT | Special Weather Statement | ABR | 13 min |
| May 28, 3:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 5:20 PM CDT | Special Weather Statement | ABR | 25 min |
| Jun 2, 9:29 PM CDT | Special Weather Statement | ABR | 31 min |
| Jun 12, 11:28 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 13, 2:33 AM CDT | Mesoscale Discussion | SPC | 57 min |
| Jun 13, 3:36 AM CDT | Severe Thunderstorm Warning | ABR | 39 min |
| Jun 13, 4:15 AM CDT | Special Weather Statement | ABR | 45 min |
| Jun 13, 5:04 AM CDT | Severe Thunderstorm Warning | ABR | 24 min |
| Jun 13, 2:32 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 13, 3:13 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 13, 5:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 6:34 PM CDT | Tornado Warning | ABR | 26 min |
| Jun 13, 6:57 PM CDT | Tornado Warning | ABR | 33 min |
| Jun 13, 7:10 PM CDT | Severe Thunderstorm Warning | ABR | 65 min |
| Jun 13, 7:22 PM CDT | Severe Thunderstorm Warning | ABR | 23 min |
| Jun 13, 7:24 PM CDT | Severe Thunderstorm Warning | ABR | 21 min |
| Jun 13, 7:38 PM CDT | Severe Thunderstorm Warning | ABR | 52 min |
| Jun 13, 7:45 PM CDT | Tornado Warning | ABR | 34 min |
| Jun 13, 8:12 PM CDT | Severe Thunderstorm Warning | ABR | 33 min |
| Jun 13, 8:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Jun 18, 7:05 PM CDT | Special Weather Statement | ABR | 40 min |
| Jun 18, 7:40 PM CDT | Severe Thunderstorm Warning | ABR | 18 min |
| Jun 21, 3:35 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 21, 5:08 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 21, 7:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 5:52 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 5, 9:01 PM CDT | Severe Thunderstorm Warning | ABR | 30 min |
| Jul 11, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 18, 4:01 AM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 19, 7:01 AM CDT | Mesoscale Discussion | SPC | 119 min |
| Jul 21, 2:20 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 3:07 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 21, 3:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Jul 21, 6:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 21, 10:34 PM CDT | Mesoscale Discussion | SPC | 56 min |
| Aug 9, 3:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Sep 19, 3:37 PM CDT | Tornado Watch | SPC | 8 hr |
| Sep 19, 6:36 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Sep 19, 7:29 PM CDT | Severe Thunderstorm Warning | ABR | 46 min |
| Sep 19, 8:12 PM CDT | Severe Thunderstorm Warning | ABR | 33 min |
| Sep 19, 8:23 PM CDT | Severe Thunderstorm Warning | ABR | 37 min |
| Sep 19, 8:41 PM CDT | Severe Thunderstorm Warning | ABR | 34 min |
| Sep 19, 8:56 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 22, 12:48 AM CDT | Severe Thunderstorm Warning | ABR | 57 min |
| Sep 22, 12:51 AM CDT | Severe Thunderstorm Warning | ABR | 54 min |
| Sep 22, 1:45 AM CDT | Severe Thunderstorm Warning | ABR | 60 min |
| Oct 7, 3:29 AM CDT | Wind Advisory | ABR | 12 hr |
| Oct 8, 3:28 AM CDT | Freeze Watch | ABR | 23 hr |
| Oct 9, 2:46 AM CDT | Freeze Warning | ABR | 30 hr |
| Oct 22, 3:03 PM CDT | Wind Advisory | ABR | 28 hr |
| Oct 22, 11:59 PM CDT | Special Weather Statement | ABR | 91 min |
| Oct 25, 3:32 AM CDT | High Wind Watch | ABR | 24 hr |
| Oct 25, 2:55 PM CDT | Wind Advisory | ABR | 45 hr |
| Oct 26, 3:17 AM CDT | High Wind Warning | ABR | 19 hr |
| Oct 30, 3:39 AM CDT | Wind Advisory | ABR | 13 hr |
| Nov 3, 3:26 AM CDT | Winter Weather Advisory | ABR | 22 hr |
| Nov 14, 1:19 AM CST | Dense Fog Advisory | ABR | 11 hr |
| Nov 21, 12:43 AM CST | Wind Advisory | ABR | 8 hr |
| Nov 29, 2:55 AM CST | Wind Advisory | ABR | 21 hr |
| Nov 29, 1:06 PM CST | High Wind Warning | ABR | 3 hr |
| Dec 3, 3:38 AM CST | Winter Storm Watch | ABR | 12 hr |
| Dec 3, 3:08 PM CST | Blizzard Warning | ABR | 28 hr |
| Dec 4, 3:54 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Dec 4, 7:31 PM CST | Winter Weather Advisory | ABR | 4 hr |
| Dec 11, 2:47 AM CST | Wind Advisory | ABR | 12 hr |
| Dec 12, 3:07 PM CST | Wind Advisory | ABR | 23 hr |
| Dec 13, 5:13 PM CST | Winter Weather Advisory | ABR | 13 hr |
| Dec 24, 4:01 AM CST | Wind Chill Advisory | ABR | 32 hr |
| Dec 25, 4:09 AM CST | Wind Chill Advisory | ABR | 32 hr |
| Dec 25, 1:26 PM CST | Wind Chill Warning | ABR | 23 hr |
| Dec 26, 1:37 PM CST | Wind Chill Advisory | ABR | 21 hr |
| Dec 29, 2:18 AM CST | Wind Chill Warning | ABR | 34 hr |
| Dec 29, 2:18 AM CST | Wind Chill Advisory | ABR | 46 hr |
| Dec 30, 2:54 AM CST | Wind Chill Warning | ABR | 57 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 | 3 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 2 |
| Mesoscale Discussion | 19 |
| Special Weather Statement | 7 |
| Winter | |
| Blizzard Warning | 1 |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 8 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 3 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 9 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 2 |
| Wind Advisory | 12 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20162018
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.