Alert archive / South Dakota / Fall River County
Weather alerts in Fall River County, South Dakota, 2010
145 weather alerts in 2010, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Fall River County and its neighbors
Each county as a circle sized by its count in 2010. Tap one for its archive.
- Alerts
- 145
- Warnings
- 49
- Watches
- 32
- Advisories
- 33
- Busiest month
- June49 alerts
- Busiest day
- June 20, 201017 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 2 tornado warnings covering Fall River County in 2010 had a tornado report inside them.
Fall River County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 36 | 27 | 25% | 38 | 76% | 28 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Rapid City, SD: tornado warnings | 22 | 4 | 82% | 11 | 45% | 20 min |
| NWS Rapid City, SD: severe thunderstorm warnings | 323 | 259 | 20% | 520 | 90% | 27 min |
| NWS Rapid City, SD: flash flood warnings | 9 | 5 | 44% | 22 | 95% | 110 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 5, 3:37 AM MST | Winter Weather Advisory | UNR | 41 hr |
| Jan 6, 8:31 PM MST | Wind Chill Advisory | UNR | 38 hr |
| Jan 7, 12:04 AM MST | Wind Chill Warning | UNR | 34 hr |
| Jan 21, 1:40 PM MST | Winter Weather Advisory | UNR | 32 hr |
| Jan 24, 2:01 AM MST | Wind Advisory | UNR | 39 hr |
| Feb 3, 2:45 PM MST | Winter Weather Advisory | UNR | 47 hr |
| Feb 4, 7:51 PM MST | Winter Storm Warning | UNR | 8 hr |
| Mar 5, 3:43 AM MST | Winter Weather Advisory | UNR | 31 hr |
| Mar 9, 1:30 PM MST | Winter Weather Advisory | UNR | 45 hr |
| Mar 18, 3:08 AM MDT | Winter Weather Advisory | UNR | 24 hr |
| Apr 5, 2:49 PM MDT | Winter Weather Advisory | UNR | 30 hr |
| Apr 12, 6:09 PM MDT | Wind Advisory | UNR | 25 hr |
| Apr 13, 11:19 AM MDT | Mesoscale Discussion | SPC | 86 min |
| Apr 29, 2:23 PM MDT | Wind Advisory | UNR | 52 hr |
| May 3, 3:24 AM MDT | High Wind Watch | UNR | 24 hr |
| May 4, 2:54 AM MDT | Wind Advisory | UNR | 16 hr |
| May 7, 2:27 PM MDT | Freeze Warning | UNR | 18 hr |
| May 10, 1:32 AM MDT | Mesoscale Discussion | SPC | 88 min |
| May 11, 3:00 AM MDT | Winter Storm Watch | UNR | 12 hr |
| May 11, 3:09 PM MDT | Winter Weather Advisory | UNR | 29 hr |
| May 21, 1:30 PM MDT | Mesoscale Discussion | SPC | 60 min |
| May 21, 2:26 PM MDT | Tornado Watch | SPC | 8 hr |
| May 21, 5:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 21, 5:45 PM MDT | Severe Thunderstorm Warning | UNR | 60 min |
| May 21, 9:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| May 21, 9:58 PM MDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 21, 9:59 PM MDT | Severe Thunderstorm Warning | UNR | 61 min |
| May 21, 11:22 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| May 22, 2:09 PM MDT | Mesoscale Discussion | SPC | 96 min |
| May 23, 3:13 PM MDT | Flood Watch | UNR | 29 hr |
| May 23, 3:30 PM MDT | High Wind Watch | UNR | 12 hr |
| May 23, 10:39 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 24, 12:26 AM MDT | Areal Flood Advisory | UNR | 5 hr |
| May 24, 3:49 AM MDT | High Wind Warning | UNR | 17 hr |
| May 24, 5:06 AM MDT | Mesoscale Discussion | SPC | 114 min |
| May 24, 11:21 AM MDT | Tornado Watch | SPC | 9 hr |
| May 24, 11:37 AM MDT | Severe Thunderstorm Warning | UNR | 38 min |
| May 24, 12:04 PM MDT | Tornado Warning | UNR | 56 min |
| May 24, 12:54 PM MDT | Severe Thunderstorm Warning | UNR | 51 min |
| May 24, 1:05 PM MDT | Areal Flood Advisory | UNR | 6 hr |
| May 24, 1:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| May 24, 2:05 PM MDT | Tornado Warning | UNR | 40 min |
| May 24, 2:07 PM MDT | Areal Flood Warning | UNR | 6 hr |
| May 24, 2:42 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| May 24, 3:32 PM MDT | Areal Flood Warning | UNR | 3 hr |
| May 24, 7:13 PM MDT | Areal Flood Warning | UNR | 24 hr |
| May 26, 3:41 PM MDT | Mesoscale Discussion | SPC | 94 min |
| May 26, 5:03 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 4, 5:25 PM MDT | Severe Thunderstorm Warning | UNR | 50 min |
| Jun 7, 3:31 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 7, 6:23 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 8:45 PM MDT | Severe Thunderstorm Watch | SPC | 11 hr |
| Jun 9, 10:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 10, 12:41 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 2:13 AM MDT | Flood Watch | UNR | 61 hr |
| Jun 13, 2:46 PM MDT | Flood Watch | UNR | 9 hr |
| Jun 13, 5:02 PM MDT | Areal Flood Advisory | UNR | 4 hr |
| Jun 14, 10:28 AM MDT | Areal Flood Advisory | UNR | 24 hr |
| Jun 16, 11:19 AM MDT | Wind Advisory | UNR | 31 hr |
| Jun 16, 3:30 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 16, 6:01 PM MDT | Mesoscale Discussion | SPC | 59 min |
| Jun 16, 6:02 PM MDT | Areal Flood Advisory | UNR | 4 hr |
| Jun 16, 6:08 PM MDT | Severe Thunderstorm Warning | UNR | 52 min |
| Jun 16, 6:56 PM MDT | Severe Thunderstorm Warning | UNR | 39 min |
| Jun 16, 7:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jun 16, 7:56 PM MDT | Severe Thunderstorm Warning | UNR | 50 min |
| Jun 19, 4:12 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 19, 6:43 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Jun 19, 7:37 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jun 19, 8:31 PM MDT | Severe Thunderstorm Warning | UNR | 59 min |
| Jun 19, 9:08 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 19, 9:39 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 19, 11:21 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jun 20, 12:11 AM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jun 20, 12:39 AM MDT | Severe Thunderstorm Warning | UNR | 66 min |
| Jun 20, 1:13 AM MDT | Severe Thunderstorm Warning | UNR | 36 min |
| Jun 20, 4:55 AM MDT | Areal Flood Advisory | UNR | 6 hr |
| Jun 20, 6:20 AM MDT | Areal Flood Warning | UNR | 12 hr |
| Jun 20, 12:59 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 1:30 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 20, 3:23 PM MDT | Flash Flood Watch | UNR | 5 hr |
| Jun 20, 3:36 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jun 20, 4:10 PM MDT | Severe Thunderstorm Warning | UNR | 27 min |
| Jun 20, 4:23 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jun 20, 6:43 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 2:08 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 21, 6:42 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jun 21, 8:07 PM MDT | Severe Thunderstorm Warning | UNR | 68 min |
| Jun 21, 8:35 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jun 21, 9:21 PM MDT | Severe Thunderstorm Warning | UNR | 54 min |
| Jun 21, 9:35 PM MDT | Areal Flood Advisory | UNR | 3 hr |
| Jun 22, 1:18 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 4:03 PM MDT | Tornado Watch | SPC | 7 hr |
| Jun 22, 4:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 22, 7:49 PM MDT | Severe Thunderstorm Warning | UNR | 86 min |
| Jun 26, 1:24 PM MDT | Mesoscale Discussion | SPC | 66 min |
| Jun 26, 1:56 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 12:02 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 3, 2:02 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 3, 6:06 PM MDT | Mesoscale Discussion | SPC | 54 min |
| Jul 10, 4:17 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 11, 12:47 PM MDT | Mesoscale Discussion | SPC | 28 min |
| Jul 11, 1:03 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 11, 4:26 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 19, 2:21 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 19, 4:02 PM MDT | Severe Thunderstorm Warning | UNR | 73 min |
| Jul 19, 5:12 PM MDT | Severe Thunderstorm Warning | UNR | 63 min |
| Jul 21, 2:49 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 7:40 PM MDT | Severe Thunderstorm Warning | UNR | 34 min |
| Jul 21, 8:20 PM MDT | Severe Thunderstorm Warning | UNR | 55 min |
| Jul 21, 8:35 PM MDT | Areal Flood Advisory | UNR | 3 hr |
| Jul 22, 4:41 PM MDT | Severe Thunderstorm Warning | UNR | 64 min |
| Jul 29, 2:05 AM MDT | Flash Flood Watch | UNR | 19 hr |
| Jul 29, 2:30 PM MDT | Tornado Watch | SPC | 7 hr |
| Jul 29, 5:12 PM MDT | Mesoscale Discussion | SPC | 93 min |
| Jul 29, 5:38 PM MDT | Severe Thunderstorm Warning | UNR | 53 min |
| Jul 29, 8:04 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Aug 3, 1:53 AM MDT | Flash Flood Watch | UNR | 15 hr |
| Aug 3, 10:47 AM MDT | Mesoscale Discussion | SPC | 58 min |
| Aug 3, 11:10 AM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 3, 1:04 PM MDT | Severe Thunderstorm Warning | UNR | 56 min |
| Aug 3, 1:31 PM MDT | Areal Flood Advisory | UNR | 3 hr |
| Aug 3, 1:58 PM MDT | Severe Thunderstorm Warning | UNR | 62 min |
| Aug 3, 2:02 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Aug 6, 1:16 PM MDT | Mesoscale Discussion | SPC | 89 min |
| Aug 9, 1:31 PM MDT | Severe Thunderstorm Warning | UNR | 19 min |
| Aug 9, 2:02 PM MDT | Severe Thunderstorm Warning | UNR | 36 min |
| Aug 9, 2:39 PM MDT | Areal Flood Advisory | UNR | 6 hr |
| Aug 9, 2:47 PM MDT | Severe Thunderstorm Warning | UNR | 17 min |
| Aug 9, 2:48 PM MDT | Mesoscale Discussion | SPC | 87 min |
| Aug 16, 10:44 AM MDT | Areal Flood Advisory | UNR | 4 hr |
| Sep 5, 1:48 PM MDT | Wind Advisory | UNR | 28 hr |
| Sep 6, 2:46 PM MDT | Frost Advisory | UNR | 14 hr |
| Oct 12, 2:19 PM MDT | Freeze Warning | UNR | 19 hr |
| Oct 24, 2:57 PM MDT | High Wind Watch | UNR | 24 hr |
| Oct 25, 2:55 PM MDT | High Wind Warning | UNR | 51 hr |
| Nov 24, 12:12 PM MST | Wind Chill Advisory | UNR | 23 hr |
| Nov 27, 9:10 PM MST | Winter Weather Advisory | UNR | 43 hr |
| Nov 28, 2:57 PM MST | Wind Advisory | UNR | 15 hr |
| Dec 20, 5:27 AM MST | Freezing Rain Advisory | UNR | 4 hr |
| Dec 22, 9:48 PM MST | Freezing Rain Advisory | UNR | 4 hr |
| Dec 23, 1:52 AM MST | Winter Weather Advisory | UNR | 9 hr |
| Dec 28, 3:03 PM MST | Winter Storm Watch | UNR | 23 hr |
| Dec 29, 2:07 PM MST | Winter Storm Warning | UNR | 63 hr |
| Dec 31, 10:22 AM MST | Mesoscale Discussion | SPC | 5 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 archive20092011
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.