Alert archive / Michigan / Ionia County
Weather alerts in Ionia County, Michigan, 2016
99 weather alerts in 2016, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Ionia County and its neighbors
Each county as a circle sized by its count in 2016. Tap one for its archive.
- Alerts
- 99
- Warnings
- 9
- Watches
- 8
- Advisories
- 48
- Busiest month
- July17 alerts
- Busiest day
- August 20, 20166 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 Ionia County in 2016 had a tornado report inside them; 0 of 2 tornado reports fell inside a warning.
Ionia County, 2016
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 2 | 0% | |
| Severe thunderstorm warnings | 4 | 2 | 50% | 5 | 60% | 7 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 Grand Rapids, MI: tornado warnings | 8 | 3 | 63% | 9 | 56% | 19 min |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 46 | 22 | 52% | 92 | 62% | 20 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 8, 3:33 PM EST | Winter Storm Watch | GRR | 12 hr |
| Jan 9, 4:01 AM EST | Winter Weather Advisory | GRR | 27 hr |
| Jan 9, 10:38 AM EST | River Flood Advisory | GRR | 7 days |
| Jan 11, 3:35 AM EST | Winter Weather Advisory | GRR | 39 hr |
| Jan 15, 10:48 AM EST | River Flood Advisory | GRR | 7 days |
| Jan 20, 1:28 PM EST | River Flood Advisory | GRR | 4 days |
| Feb 2, 11:02 AM EST | River Flood Advisory | GRR | 7 days |
| Feb 3, 3:27 AM EST | Dense Fog Advisory | GRR | 6 hr |
| Feb 3, 10:44 AM EST | River Flood Advisory | GRR | 7 days |
| Feb 19, 2:19 AM EST | Wind Advisory | GRR | 22 hr |
| Feb 22, 3:38 PM EST | Winter Storm Watch | GRR | 24 hr |
| Feb 23, 3:47 PM EST | Winter Storm Warning | GRR | 42 hr |
| Feb 24, 11:49 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 27, 7:58 PM EST | River Flood Advisory | GRR | 7 days |
| Feb 29, 3:35 AM EST | Winter Weather Advisory | GRR | 45 hr |
| Feb 29, 8:26 PM EST | River Flood Advisory | GRR | 4 days |
| Mar 1, 2:58 AM EST | Winter Storm Warning | GRR | 22 hr |
| Mar 1, 1:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Mar 2, 8:50 PM EST | River Flood Advisory | GRR | 20 days |
| Mar 5, 7:18 AM EST | Winter Weather Advisory | GRR | 5 hr |
| Mar 6, 3:13 AM EST | Freezing Fog Advisory | GRR | 6 hr |
| Mar 8, 11:50 AM EST | River Flood Advisory | GRR | 24 hr |
| Mar 15, 3:45 PM EDT | Wind Advisory | GRR | 29 hr |
| Mar 16, 3:29 AM EDT | High Wind Warning | GRR | 17 hr |
| Mar 21, 3:40 AM EDT | Winter Storm Watch | GRR | 33 hr |
| Mar 22, 12:52 PM EDT | Winter Weather Advisory | GRR | 45 hr |
| Mar 23, 9:36 AM EDT | River Flood Advisory | GRR | 26 days |
| Mar 24, 10:11 PM EDT | River Flood Advisory | GRR | 37 hr |
| Mar 31, 11:03 AM EDT | River Flood Advisory | GRR | 7 days |
| Mar 31, 4:49 PM EDT | Special Weather Statement | GRR | 56 min |
| Apr 2, 3:43 AM EDT | Winter Weather Advisory | GRR | 15 hr |
| Apr 5, 3:47 AM EDT | Winter Weather Advisory | GRR | 33 hr |
| Apr 9, 3:41 PM EDT | Winter Weather Advisory | GRR | 26 hr |
| Apr 22, 5:40 AM EDT | Special Weather Statement | GRR | 80 min |
| Apr 25, 6:02 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Apr 26, 6:12 AM EDT | Dense Fog Advisory | GRR | 3 hr |
| May 2, 9:57 PM EDT | River Flood Advisory | GRR | 52 hr |
| May 4, 11:34 AM EDT | River Flood Advisory | GRR | 4 days |
| May 12, 3:45 PM EDT | Special Weather Statement | GRR | 2 hr |
| May 13, 10:22 AM EDT | River Flood Advisory | GRR | 6 days |
| May 14, 3:36 PM EDT | Frost Advisory | GRR | 16 hr |
| May 16, 5:57 PM EDT | Special Weather Statement | GRR | 108 min |
| Jun 5, 7:19 AM EDT | Special Weather Statement | GRR | 26 min |
| Jun 6, 12:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 10, 7:57 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 15, 9:24 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 10:42 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 20, 12:12 PM EDT | Special Weather Statement | GRR | 48 min |
| Jul 8, 12:32 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 3:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jul 8, 3:50 PM EDT | Severe Thunderstorm Warning | GRR | 29 min |
| Jul 8, 4:33 PM EDT | Severe Thunderstorm Warning | GRR | 42 min |
| Jul 12, 4:20 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 12, 4:38 PM EDT | Special Weather Statement | GRR | 52 min |
| Jul 12, 5:34 PM EDT | Special Weather Statement | GRR | 41 min |
| Jul 12, 6:12 PM EDT | Special Weather Statement | GRR | 48 min |
| Jul 20, 3:43 PM EDT | Heat Advisory | GRR | 51 hr |
| Jul 21, 9:28 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 21, 9:45 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 21, 12:15 PM EDT | Special Weather Statement | GRR | 60 min |
| Jul 21, 12:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 21, 1:16 PM EDT | Special Weather Statement | GRR | 59 min |
| Jul 24, 8:34 AM EDT | Special Weather Statement | GRR | 56 min |
| Jul 27, 1:46 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 4:25 AM EDT | Areal Flood Advisory | GRR | 3 hr |
| Aug 12, 3:40 PM EDT | Flood Watch | GRR | 16 hr |
| Aug 15, 3:51 AM EDT | Flood Watch | GRR | 24 hr |
| Aug 16, 10:35 AM EDT | River Flood Advisory | GRR | 4 days |
| Aug 17, 11:27 AM EDT | Special Weather Statement | GRR | 63 min |
| Aug 17, 12:17 PM EDT | Special Weather Statement | GRR | 58 min |
| Aug 17, 12:25 PM EDT | Mesoscale Discussion | SPC | 65 min |
| Aug 20, 11:19 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 20, 2:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Aug 20, 2:59 PM EDT | Areal Flood Advisory | GRR | 12 hr |
| Aug 20, 3:04 PM EDT | Severe Thunderstorm Warning | GRR | 41 min |
| Aug 20, 3:17 PM EDT | Tornado Warning | GRR | 28 min |
| Aug 20, 3:33 PM EDT | Severe Thunderstorm Warning | GRR | 42 min |
| Aug 30, 5:05 PM EDT | Areal Flood Advisory | GRR | 3 hr |
| Sep 7, 11:19 AM EDT | Flood Watch | GRR | 11 hr |
| Sep 7, 12:48 PM EDT | Special Weather Statement | GRR | 57 min |
| Sep 7, 1:37 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 9, 2:50 AM EDT | Dense Fog Advisory | GRR | 6 hr |
| Sep 10, 2:48 PM EDT | Special Weather Statement | GRR | 57 min |
| Sep 21, 9:08 AM EDT | Special Weather Statement | GRR | 112 min |
| Oct 1, 6:43 PM EDT | Areal Flood Advisory | GRR | 4 hr |
| Oct 5, 9:41 PM EDT | Dense Fog Advisory | GRR | 13 hr |
| Oct 9, 2:30 PM EDT | Frost Advisory | GRR | 19 hr |
| Oct 13, 1:53 AM EDT | Frost Advisory | GRR | 31 hr |
| Oct 21, 11:01 AM EDT | Frost Advisory | GRR | 20 hr |
| Nov 3, 9:39 AM EDT | River Flood Advisory | GRR | 5 days |
| Nov 7, 1:08 AM EST | Dense Fog Advisory | GRR | 7 hr |
| Nov 17, 12:38 AM EST | Dense Fog Advisory | GRR | 3 hr |
| Nov 27, 8:31 PM EST | River Flood Advisory | GRR | 8 days |
| Dec 10, 3:42 AM EST | Winter Weather Advisory | GRR | 47 hr |
| Dec 11, 3:51 AM EST | Winter Storm Warning | GRR | 23 hr |
| Dec 11, 6:42 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 14, 3:37 AM EST | Winter Weather Advisory | GRR | 32 hr |
| Dec 15, 3:50 PM EST | Winter Weather Advisory | GRR | 63 hr |
| Dec 25, 8:15 PM EST | River Flood Advisory | GRR | 7 days |
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 | 4 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 2 |
| Mesoscale Discussion | 17 |
| Special Weather Statement | 17 |
| Flooding | |
| Flood Watch | 3 |
| Areal Flood Advisory | 4 |
| River Flood Advisory | 19 |
| Winter | |
| Winter Storm Warning | 3 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 11 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Warning | 1 |
| Wind Advisory | 2 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
| Freezing Fog Advisory | 1 |
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.