Alert archive / Michigan / Oakland County
Weather alerts in Oakland County, Michigan, 2015
122 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Oakland County and its neighbors
Each county as a circle sized by its count in 2015. Tap one for its archive.
- Alerts
- 122
- Warnings
- 14
- Watches
- 16
- Advisories
- 30
- Busiest month
- May22 alerts
- Busiest day
- June 23, 20156 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 Oakland County in 2015 had a tornado report inside them.
Oakland 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 | 5 | 4 | 20% | 12 | 92% | 11 min |
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2015
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 10 | 3 | 70% | 7 | 57% | 15 min |
| NWS Detroit, MI: severe thunderstorm warnings | 69 | 50 | 28% | 177 | 70% | 25 min |
| NWS Detroit, MI: flash flood warnings | 5 | 0 | 100% | 0 |
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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 4:10 PM EST | Winter Weather Advisory | DTX | 27 hr |
| Jan 4, 3:03 PM EST | Wind Chill Advisory | DTX | 21 hr |
| Jan 6, 3:15 PM EST | Wind Chill Advisory | DTX | 49 hr |
| Jan 8, 3:57 AM EST | Winter Weather Advisory | DTX | 21 hr |
| Jan 9, 3:39 PM EST | Wind Chill Advisory | DTX | 20 hr |
| Jan 30, 1:57 PM EST | Winter Storm Watch | DTX | 26 hr |
| Jan 31, 4:00 PM EST | Winter Storm Warning | DTX | 38 hr |
| Feb 1, 2:35 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 3, 2:50 PM EST | Winter Weather Advisory | DTX | 13 hr |
| Feb 11, 10:00 PM EST | Wind Chill Advisory | DTX | 35 hr |
| Feb 13, 2:49 PM EST | Wind Chill Watch | DTX | 12 hr |
| Feb 14, 3:17 AM EST | Wind Chill Warning | DTX | 33 hr |
| Feb 15, 11:59 AM EST | Wind Chill Advisory | DTX | 20 hr |
| Feb 18, 11:25 AM EST | Wind Chill Warning | DTX | 26 hr |
| Feb 18, 11:25 AM EST | Wind Chill Advisory | DTX | 47 hr |
| Feb 22, 3:57 AM EST | Wind Chill Advisory | DTX | 32 hr |
| Mar 2, 3:40 PM EST | Winter Weather Advisory | DTX | 27 hr |
| Mar 14, 12:30 AM EDT | Dense Fog Advisory | DTX | 9 hr |
| Apr 3, 2:59 AM EDT | Dense Fog Advisory | DTX | 6 hr |
| Apr 9, 4:00 PM EDT | Wind Advisory | DTX | 23 hr |
| Apr 9, 7:11 PM EDT | Tornado Watch | SPC | 98 min |
| Apr 10, 12:56 AM EDT | Mesoscale Discussion | SPC | 94 min |
| Apr 10, 2:54 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 20, 1:07 PM EDT | Special Weather Statement | DTX | 53 min |
| Apr 21, 11:18 AM EDT | Wind Advisory | DTX | 9 hr |
| May 8, 5:54 PM EDT | Special Weather Statement | DTX | 66 min |
| May 8, 8:53 PM EDT | Special Weather Statement | DTX | 67 min |
| May 10, 3:25 PM EDT | Special Weather Statement | DTX | 35 min |
| May 10, 4:04 PM EDT | Special Weather Statement | DTX | 26 min |
| May 10, 8:37 PM EDT | Special Weather Statement | DTX | 53 min |
| May 11, 12:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 1:14 PM EDT | Tornado Watch | SPC | 7 hr |
| May 11, 4:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 13, 3:47 PM EDT | Frost Advisory | DTX | 16 hr |
| May 22, 3:39 PM EDT | Frost Advisory | DTX | 16 hr |
| May 25, 2:00 PM EDT | Special Weather Statement | DTX | 60 min |
| May 26, 3:01 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 26, 4:41 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 4:53 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 6:31 PM EDT | Special Weather Statement | DTX | 29 min |
| May 27, 12:09 PM EDT | Mesoscale Discussion | SPC | 96 min |
| May 27, 1:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 27, 2:40 PM EDT | Severe Thunderstorm Warning | DTX | 65 min |
| May 27, 3:26 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 30, 10:38 AM EDT | Flood Watch | DTX | 29 hr |
| May 30, 11:23 AM EDT | Special Weather Statement | DTX | 22 min |
| May 30, 5:34 PM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jun 7, 6:35 PM EDT | Special Weather Statement | DTX | 55 min |
| Jun 7, 9:09 PM EDT | Special Weather Statement | DTX | 51 min |
| Jun 7, 10:05 PM EDT | Special Weather Statement | DTX | 55 min |
| Jun 8, 2:06 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jun 10, 2:46 AM EDT | Special Weather Statement | DTX | 59 min |
| Jun 10, 4:31 AM EDT | Special Weather Statement | DTX | 59 min |
| Jun 11, 8:55 PM EDT | Severe Thunderstorm Warning | DTX | 24 min |
| Jun 14, 2:28 PM EDT | Flash Flood Warning | DTX | 3 hr |
| Jun 15, 10:44 AM EDT | Flash Flood Watch | DTX | 12 hr |
| Jun 18, 3:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 1:23 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 22, 2:12 PM EDT | Special Weather Statement | DTX | 48 min |
| Jun 22, 3:43 PM EDT | Special Weather Statement | DTX | 62 min |
| Jun 22, 4:28 PM EDT | Special Weather Statement | DTX | 47 min |
| Jun 22, 8:31 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 22, 9:17 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 22, 11:00 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Jun 22, 11:49 PM EDT | Special Weather Statement | DTX | 26 min |
| Jun 23, 12:20 AM EDT | Special Weather Statement | DTX | 25 min |
| Jun 23, 1:34 AM EDT | Special Weather Statement | DTX | 26 min |
| Jun 27, 10:57 AM EDT | Areal Flood Advisory | DTX | 12 hr |
| Jul 14, 3:05 AM EDT | Special Weather Statement | DTX | 55 min |
| Jul 17, 3:29 PM EDT | Heat Advisory | DTX | 22 hr |
| Jul 18, 12:12 PM EDT | Special Weather Statement | DTX | 48 min |
| Jul 25, 3:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 29, 2:28 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 29, 2:52 PM EDT | Special Weather Statement | DTX | 38 min |
| Jul 29, 3:37 PM EDT | Special Weather Statement | DTX | 53 min |
| Aug 2, 2:56 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Aug 2, 6:27 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 2, 8:12 PM EDT | Special Weather Statement | DTX | 63 min |
| Aug 2, 9:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 2, 11:05 PM EDT | Severe Thunderstorm Warning | DTX | 63 min |
| Aug 14, 7:12 PM EDT | Severe Thunderstorm Warning | DTX | 35 min |
| Aug 19, 2:34 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 23, 1:12 PM EDT | Mesoscale Discussion | SPC | 93 min |
| Aug 23, 5:29 PM EDT | Special Weather Statement | DTX | 31 min |
| Aug 23, 5:45 PM EDT | Tornado Warning | DTX | 21 min |
| Aug 23, 6:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 30, 11:13 PM EDT | Dense Fog Advisory | DTX | 10 hr |
| Sep 2, 6:03 PM EDT | Special Weather Statement | DTX | 42 min |
| Sep 2, 6:44 PM EDT | Special Weather Statement | DTX | 46 min |
| Sep 3, 1:00 PM EDT | Special Weather Statement | DTX | 30 min |
| Sep 3, 1:29 PM EDT | Severe Thunderstorm Warning | DTX | 61 min |
| Sep 3, 4:37 PM EDT | Flash Flood Watch | DTX | 9 hr |
| Sep 7, 4:54 PM EDT | Special Weather Statement | DTX | 51 min |
| Sep 8, 3:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Sep 19, 10:47 AM EDT | Special Weather Statement | DTX | 58 min |
| Oct 15, 3:41 PM EDT | Freeze Watch | DTX | 23 hr |
| Oct 16, 3:03 PM EDT | Freeze Warning | DTX | 18 hr |
| Oct 17, 2:20 PM EDT | Freeze Warning | DTX | 19 hr |
| Oct 24, 3:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Oct 24, 6:10 PM EDT | Special Weather Statement | DTX | 65 min |
| Nov 6, 6:22 AM EST | Special Weather Statement | DTX | 53 min |
| Nov 6, 6:57 AM EST | Special Weather Statement | DTX | 63 min |
| Nov 11, 4:54 AM EST | High Wind Watch | DTX | 11 hr |
| Nov 11, 3:38 PM EST | High Wind Warning | DTX | 23 hr |
| Nov 11, 3:38 PM EST | Wind Advisory | DTX | 28 hr |
| Nov 20, 4:03 AM EST | Winter Storm Watch | DTX | 11 hr |
| Nov 20, 3:25 PM EST | Winter Weather Advisory | DTX | 31 hr |
| Nov 21, 9:02 AM EST | Winter Storm Warning | DTX | 13 hr |
| Nov 21, 9:36 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Dec 5, 3:07 AM EST | Dense Fog Advisory | DTX | 9 hr |
| Dec 5, 7:55 PM EST | Dense Fog Advisory | DTX | 14 hr |
| Dec 6, 8:20 PM EST | Dense Fog Advisory | DTX | 15 hr |
| Dec 7, 4:43 PM EST | Dense Fog Advisory | DTX | 13 hr |
| Dec 12, 8:07 PM EST | Dense Fog Advisory | DTX | 14 hr |
| Dec 14, 9:47 AM EST | Special Weather Statement | DTX | 58 min |
| Dec 14, 12:31 PM EST | Special Weather Statement | DTX | 89 min |
| Dec 14, 5:32 PM EST | Special Weather Statement | DTX | 58 min |
| Dec 23, 3:23 PM EST | Wind Advisory | DTX | 17 hr |
| Dec 23, 6:20 PM EST | Special Weather Statement | DTX | 85 min |
| Dec 27, 3:30 AM EST | Winter Storm Watch | DTX | 23 hr |
| Dec 28, 2:39 AM EST | Winter Weather Advisory | DTX | 22 hr |
| Dec 28, 12:04 PM EST | Mesoscale Discussion | SPC | 6 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.