Alert archive / Michigan / Ottawa County
Weather alerts in Ottawa County, Michigan, 2013
133 weather alerts in 2013, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ottawa County and its neighbors
Each county as a circle sized by its count in 2013. Tap one for its archive.
- Alerts
- 133
- Warnings
- 17
- Watches
- 20
- Advisories
- 48
- Busiest month
- January21 alerts
- Busiest day
- April 18, 20136 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Ottawa County, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 3 | 57% | 4 | 75% | 23 min |
| Flash flood warnings | 1 | 1 | 0% | 0 |
Each office's whole area, 2013
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Rapids, MI: tornado warnings | 4 | 0 | 100% | 2 | 0% | |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 75 | 36 | 52% | 133 | 65% | 26 min |
| NWS Grand Rapids, MI: flash flood warnings | 3 | 2 | 33% | 6 | 100% | 104 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 3:39 PM EST | Winter Weather Advisory | GRR | 19 hr |
| Jan 7, 4:33 AM EST | Wind Advisory | GRR | 14 hr |
| Jan 12, 3:25 PM EST | Winter Weather Advisory | GRR | 16 hr |
| Jan 12, 10:13 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 18, 11:27 AM EST | Wind Advisory | GRR | 11 hr |
| Jan 19, 3:15 AM EST | Winter Storm Watch | GRR | 24 hr |
| Jan 19, 3:47 PM EST | Wind Advisory | GRR | 15 hr |
| Jan 20, 3:38 AM EST | Lake Effect Snow Warning | GRR | 24 hr |
| Jan 20, 3:38 AM EST | Lake Effect Snow Advisory | GRR | 4 days |
| Jan 24, 9:09 PM EST | Winter Weather Advisory | GRR | 26 hr |
| Jan 26, 3:37 PM EST | Winter Weather Advisory | GRR | 45 hr |
| Jan 27, 6:28 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 28, 3:29 AM EST | Flood Watch | GRR | 54 hr |
| Jan 28, 10:12 AM EST | Dense Fog Advisory | GRR | 27 hr |
| Jan 29, 2:50 AM EST | Special Weather Statement | GRR | 85 min |
| Jan 29, 4:07 AM EST | Special Weather Statement | GRR | 53 min |
| Jan 29, 9:41 PM EST | Areal Flood Warning | GRR | 38 hr |
| Jan 30, 3:21 AM EST | Lake Effect Snow Watch | GRR | 10 hr |
| Jan 30, 1:08 PM EST | Lake Effect Snow Advisory | GRR | 39 hr |
| Jan 30, 2:43 PM EST | Flood Watch | GRR | 19 hr |
| Jan 31, 3:19 AM EST | Lake Effect Snow Warning | GRR | 58 hr |
| Feb 2, 3:25 PM EST | Lake Effect Snow Advisory | GRR | 46 hr |
| Feb 4, 4:18 PM EST | River Flood Watch | GRR | 6 hr |
| Feb 4, 8:59 PM EST | River Flood Advisory | GRR | 28 min |
| Feb 4, 10:01 PM EST | River Flood Warning | GRR | 9 days |
| Feb 6, 2:54 AM EST | Winter Storm Watch | GRR | 12 hr |
| Feb 6, 3:09 PM EST | Winter Storm Warning | GRR | 40 hr |
| Feb 10, 4:12 PM EST | Wind Advisory | GRR | 32 hr |
| Feb 14, 3:20 AM EST | Lake Effect Snow Watch | GRR | 25 hr |
| Feb 15, 4:00 AM EST | Lake Effect Snow Advisory | GRR | 45 hr |
| Feb 18, 4:17 AM EST | Winter Weather Advisory | GRR | 59 hr |
| Feb 21, 3:42 PM EST | Winter Weather Advisory | GRR | 21 hr |
| Feb 24, 3:15 PM EST | Winter Storm Watch | GRR | 24 hr |
| Feb 25, 3:08 PM EST | Winter Weather Advisory | GRR | 43 hr |
| Mar 15, 3:53 PM EDT | Winter Weather Advisory | GRR | 19 hr |
| Mar 18, 3:17 AM EDT | Lake Effect Snow Advisory | GRR | 40 hr |
| Mar 20, 3:56 AM EDT | Lake Effect Snow Advisory | GRR | 27 hr |
| Apr 8, 12:49 PM EDT | Wind Advisory | GRR | 7 hr |
| Apr 9, 11:27 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 10, 3:30 AM EDT | Flood Watch | GRR | 41 hr |
| Apr 10, 11:35 AM EDT | River Flood Warning | GRR | 19 days |
| Apr 11, 3:53 AM EDT | Areal Flood Advisory | GRR | 7 hr |
| Apr 11, 5:32 AM EDT | Special Weather Statement | GRR | 118 min |
| Apr 11, 8:38 PM EDT | Areal Flood Advisory | GRR | 24 hr |
| Apr 16, 3:18 PM EDT | Flood Watch | GRR | 63 hr |
| Apr 17, 1:26 PM EDT | Mesoscale Discussion | SPC | 64 min |
| Apr 17, 3:26 PM EDT | Special Weather Statement | GRR | 109 min |
| Apr 17, 4:02 PM EDT | Areal Flood Advisory | GRR | 9 hr |
| Apr 18, 5:11 AM EDT | Areal Flood Warning | GRR | 3 days |
| Apr 18, 9:48 AM EDT | Mesoscale Discussion | SPC | 27 min |
| Apr 18, 10:01 AM EDT | Severe Thunderstorm Warning | GRR | 59 min |
| Apr 18, 10:06 AM EDT | Tornado Watch | SPC | 6 hr |
| Apr 18, 11:12 AM EDT | Severe Thunderstorm Warning | GRR | 48 min |
| Apr 18, 3:18 PM EDT | Wind Advisory | GRR | 29 hr |
| Apr 29, 2:43 AM EDT | Dense Fog Advisory | GRR | 7 hr |
| Apr 29, 10:36 AM EDT | River Flood Advisory | GRR | 11 hr |
| Apr 30, 5:58 AM EDT | Special Weather Statement | GRR | 92 min |
| May 11, 2:31 PM EDT | Special Weather Statement | GRR | 89 min |
| May 11, 3:31 PM EDT | Freeze Watch | GRR | 12 hr |
| May 12, 3:29 AM EDT | Freeze Warning | GRR | 29 hr |
| May 20, 12:58 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 22, 12:41 PM EDT | Areal Flood Advisory | GRR | 6 hr |
| May 23, 3:37 AM EDT | Frost Advisory | GRR | 27 hr |
| May 24, 3:43 PM EDT | Frost Advisory | GRR | 16 hr |
| May 29, 12:16 AM EDT | Special Weather Statement | GRR | 59 min |
| May 31, 2:50 AM EDT | Special Weather Statement | GRR | 55 min |
| Jun 2, 3:22 AM EDT | Beach Hazards Statement | GRR | 17 hr |
| Jun 11, 6:44 AM EDT | Dense Fog Advisory | GRR | 3 hr |
| Jun 12, 2:10 PM EDT | Flash Flood Watch | GRR | 16 hr |
| Jun 12, 4:23 PM EDT | Special Weather Statement | GRR | 37 min |
| Jun 12, 6:56 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 12, 8:03 PM EDT | Special Weather Statement | GRR | |
| Jun 12, 8:04 PM EDT | Special Weather Statement | GRR | |
| Jun 12, 8:06 PM EDT | Special Weather Statement | GRR | 114 min |
| Jun 12, 9:37 PM EDT | Beach Hazards Statement | GRR | 30 hr |
| Jun 12, 9:46 PM EDT | Severe Thunderstorm Warning | GRR | 59 min |
| Jun 12, 10:55 PM EDT | Flash Flood Warning | GRR | 6 hr |
| Jun 24, 7:14 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 25, 11:27 AM EDT | Special Weather Statement | GRR | 63 min |
| Jun 25, 11:55 AM EDT | Severe Thunderstorm Warning | GRR | 50 min |
| Jun 27, 1:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 27, 7:12 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 3:40 PM EDT | Heat Advisory | GRR | 4 days |
| Jul 18, 1:10 PM EDT | Beach Hazards Statement | GRR | 34 hr |
| Jul 19, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 19, 3:50 PM EDT | Severe Thunderstorm Warning | GRR | 40 min |
| Jul 19, 5:48 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Jul 19, 9:30 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 3:22 AM EDT | Beach Hazards Statement | GRR | 18 hr |
| Jul 22, 3:27 PM EDT | Beach Hazards Statement | GRR | 53 hr |
| Jul 25, 3:47 PM EDT | Beach Hazards Statement | GRR | 29 hr |
| Jul 27, 3:33 AM EDT | Beach Hazards Statement | GRR | 60 hr |
| Aug 3, 4:17 AM EDT | Dense Fog Advisory | GRR | 5 hr |
| Aug 7, 2:12 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Aug 7, 6:37 AM EDT | Mesoscale Discussion | SPC | 113 min |
| Aug 12, 4:10 PM EDT | Beach Hazards Statement | GRR | 32 hr |
| Aug 21, 11:46 PM EDT | Special Weather Statement | GRR | 59 min |
| Aug 24, 12:04 PM EDT | Beach Hazards Statement | GRR | 52 hr |
| Aug 27, 3:15 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 9:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 30, 1:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 30, 3:07 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 30, 6:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 30, 6:53 PM EDT | Special Weather Statement | GRR | 67 min |
| Sep 1, 3:16 AM EDT | Beach Hazards Statement | GRR | 47 hr |
| Sep 9, 5:30 AM EDT | Areal Flood Advisory | GRR | 6 hr |
| Sep 9, 7:18 AM EDT | Severe Thunderstorm Warning | GRR | 57 min |
| Sep 9, 10:49 AM EDT | Beach Hazards Statement | GRR | 31 hr |
| Sep 11, 3:22 PM EDT | Beach Hazards Statement | GRR | 63 hr |
| Sep 14, 3:04 PM EDT | Beach Hazards Statement | GRR | 23 hr |
| Sep 19, 4:14 AM EDT | Beach Hazards Statement | GRR | 64 hr |
| Oct 5, 12:17 PM EDT | Flood Watch | GRR | 22 hr |
| Oct 20, 9:38 PM EDT | Special Weather Statement | GRR | 52 min |
| Oct 25, 2:17 PM EDT | Wind Advisory | GRR | 18 hr |
| Oct 31, 3:34 PM EDT | Wind Advisory | GRR | 16 hr |
| Nov 17, 3:29 AM EST | High Wind Warning | GRR | 24 hr |
| Nov 17, 11:01 AM EST | Mesoscale Discussion | SPC | 119 min |
| Nov 17, 11:20 AM EST | Tornado Watch | SPC | 9 hr |
| Nov 17, 2:10 PM EST | Severe Thunderstorm Warning | GRR | 65 min |
| Nov 17, 2:13 PM EST | Mesoscale Discussion | SPC | 77 min |
| Nov 23, 3:17 AM EST | Lake Effect Snow Advisory | GRR | 30 hr |
| Nov 26, 3:14 PM EST | Lake Effect Snow Advisory | GRR | 37 hr |
| Nov 27, 3:14 PM EST | Winter Weather Advisory | GRR | 31 hr |
| Dec 4, 5:03 AM EST | Dense Fog Advisory | GRR | 7 hr |
| Dec 9, 3:47 PM EST | Winter Weather Advisory | GRR | 47 hr |
| Dec 13, 3:44 AM EST | Winter Weather Advisory | GRR | 62 hr |
| Dec 16, 3:19 AM EST | Winter Weather Advisory | GRR | 20 hr |
| Dec 17, 3:22 AM EST | Winter Weather Advisory | GRR | 24 hr |
| Dec 19, 3:17 AM EST | Winter Weather Advisory | GRR | 40 hr |
| Dec 20, 3:30 PM EST | Winter Storm Watch | GRR | 12 hr |
| Dec 21, 3:30 AM EST | Winter Weather Advisory | GRR | 35 hr |
| Dec 22, 2:50 PM EST | Winter Weather Advisory | GRR | 40 hr |
| Dec 24, 3:25 PM EST | Winter Weather Advisory | GRR | 53 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 archive20122014
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.