Alert archive / Michigan / Osceola County
Weather alerts in Osceola County, Michigan, 2017
82 weather alerts in 2017, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Osceola County and its neighbors
Each county as a circle sized by its count in 2017. Tap one for its archive.
- Alerts
- 82
- Warnings
- 6
- Watches
- 7
- Advisories
- 41
- Busiest month
- January11 alerts
- Busiest day
- June 23, 20174 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Osceola County, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 2 | 1 | 50% | 4 | 100% | 16 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 Grand Rapids, MI: tornado warnings | 1 | 1 | 0% | 2 | 50% | 1 min |
| NWS Grand Rapids, MI: severe thunderstorm warnings | 29 | 12 | 59% | 48 | 83% | 19 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 3, 3:38 AM EST | Winter Weather Advisory | GRR | 3 days |
| Jan 3, 10:01 AM EST | Dense Fog Advisory | GRR | 5 hr |
| Jan 9, 12:45 PM EST | Winter Weather Advisory | GRR | 28 hr |
| Jan 10, 3:30 AM EST | High Wind Watch | GRR | 11 hr |
| Jan 10, 2:24 PM EST | Wind Advisory | GRR | 13 hr |
| Jan 11, 2:05 PM EST | Winter Weather Advisory | GRR | 11 hr |
| Jan 11, 7:32 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 16, 3:34 AM EST | Winter Weather Advisory | GRR | 29 hr |
| Jan 16, 7:36 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 20, 4:28 PM EST | Dense Fog Advisory | GRR | 14 hr |
| Jan 21, 4:09 PM EST | Dense Fog Advisory | GRR | 36 hr |
| Feb 6, 3:47 PM EST | Winter Weather Advisory | GRR | 24 hr |
| Feb 12, 1:58 AM EST | Wind Advisory | GRR | 18 hr |
| Feb 14, 12:06 PM EST | Winter Weather Advisory | GRR | 15 hr |
| Feb 21, 8:36 PM EST | Dense Fog Advisory | GRR | 12 hr |
| Feb 23, 3:26 AM EST | Winter Weather Advisory | GRR | 32 hr |
| Feb 24, 6:03 PM EST | Mesoscale Discussion | SPC | 87 min |
| Feb 24, 9:00 PM EST | River Flood Advisory | GRR | 64 hr |
| Feb 27, 9:54 PM EST | River Flood Advisory | GRR | 5 days |
| Feb 28, 3:05 PM EST | Winter Weather Advisory | GRR | 30 hr |
| Mar 7, 3:30 AM EST | High Wind Watch | GRR | 11 hr |
| Mar 7, 3:38 AM EST | Special Weather Statement | GRR | 3 hr |
| Mar 7, 2:51 PM EST | Wind Advisory | GRR | 28 hr |
| Mar 12, 1:57 AM EST | Winter Weather Advisory | GRR | 40 hr |
| Mar 16, 3:36 PM EDT | Winter Weather Advisory | GRR | 24 hr |
| Apr 4, 11:51 AM EDT | River Flood Advisory | GRR | 8 days |
| Apr 4, 3:58 PM EDT | Winter Storm Watch | GRR | 24 hr |
| Apr 5, 3:47 PM EDT | Winter Storm Warning | GRR | 12 hr |
| Apr 5, 3:47 PM EDT | Winter Weather Advisory | GRR | 24 hr |
| Apr 10, 7:10 AM EDT | Special Weather Statement | GRR | 50 min |
| Apr 10, 8:22 AM EDT | Special Weather Statement | GRR | 23 min |
| Apr 10, 7:22 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Apr 16, 10:06 AM EDT | River Flood Advisory | GRR | 7 days |
| Apr 29, 11:03 PM EDT | River Flood Advisory | GRR | 60 hr |
| May 1, 4:14 AM EDT | Special Weather Statement | GRR | 91 min |
| May 6, 2:55 PM EDT | Freeze Watch | GRR | 13 hr |
| May 7, 3:41 AM EDT | Freeze Warning | GRR | 29 hr |
| May 8, 9:53 AM EDT | Freeze Warning | GRR | 22 hr |
| May 9, 2:53 PM EDT | Frost Advisory | GRR | 13 hr |
| May 28, 12:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Jun 12, 10:27 AM EDT | Special Weather Statement | GRR | 63 min |
| Jun 12, 6:48 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 9:09 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 12, 10:30 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 14, 5:59 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 22, 4:37 AM EDT | Special Weather Statement | GRR | 53 min |
| Jun 22, 5:30 AM EDT | Special Weather Statement | GRR | 60 min |
| Jun 22, 9:53 PM EDT | Flood Watch | GRR | 6 hr |
| Jun 23, 12:06 AM EDT | Special Weather Statement | GRR | 54 min |
| Jun 23, 12:25 AM EDT | Areal Flood Advisory | GRR | 4 hr |
| Jun 23, 11:30 AM EDT | River Flood Advisory | GRR | 21 hr |
| Jul 7, 12:37 AM EDT | Special Weather Statement | GRR | 53 min |
| Jul 7, 1:24 AM EDT | Special Weather Statement | GRR | 66 min |
| Jul 13, 12:40 AM EDT | Special Weather Statement | GRR | 65 min |
| Jul 13, 2:18 AM EDT | Severe Thunderstorm Warning | GRR | 42 min |
| Jul 13, 3:19 AM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 26, 1:04 PM EDT | Special Weather Statement | GRR | 56 min |
| Jul 31, 3:53 PM EDT | Special Weather Statement | GRR | 52 min |
| Aug 3, 5:44 PM EDT | Severe Thunderstorm Warning | GRR | 26 min |
| Aug 3, 5:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Aug 3, 7:59 PM EDT | Special Weather Statement | GRR | 31 min |
| Aug 17, 1:46 PM EDT | Special Weather Statement | GRR | 89 min |
| Aug 29, 7:22 AM EDT | Dense Fog Advisory | GRR | 3 hr |
| Aug 29, 3:30 PM EDT | Dense Fog Advisory | GRR | 19 hr |
| Sep 8, 2:47 PM EDT | Frost Advisory | GRR | 17 hr |
| Sep 14, 2:34 AM EDT | Dense Fog Advisory | GRR | 6 hr |
| Sep 29, 3:49 AM EDT | Frost Advisory | GRR | 29 hr |
| Sep 30, 3:28 PM EDT | Frost Advisory | GRR | 18 hr |
| Oct 14, 11:37 AM EDT | Wind Advisory | GRR | 28 hr |
| Oct 15, 5:56 AM EDT | Special Weather Statement | GRR | 64 min |
| Oct 22, 3:27 AM EDT | Flood Watch | GRR | 36 hr |
| Oct 23, 11:47 AM EDT | River Flood Advisory | GRR | 6 days |
| Oct 23, 2:36 PM EDT | Areal Flood Advisory | GRR | 42 hr |
| Oct 23, 8:12 PM EDT | Areal Flood Warning | GRR | 36 hr |
| Nov 19, 8:18 AM EST | Special Weather Statement | GRR | 57 min |
| Dec 3, 3:12 AM EST | Freezing Fog Advisory | GRR | 6 hr |
| Dec 4, 3:51 PM EST | Wind Advisory | GRR | 27 hr |
| Dec 11, 3:41 AM EST | Winter Weather Advisory | GRR | 30 hr |
| Dec 12, 3:45 PM EST | Winter Weather Advisory | GRR | 31 hr |
| Dec 18, 2:46 AM EST | Winter Weather Advisory | GRR | 8 hr |
| Dec 21, 11:41 AM EST | Winter Weather Advisory | GRR | 24 hr |
| Dec 25, 1:52 PM EST | Special Weather Statement | GRR | 3 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 | 2 |
| Severe Thunderstorm Watch | 1 |
| Mesoscale Discussion | 10 |
| Special Weather Statement | 18 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 2 |
| River Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 15 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 4 |
| Wind and dust | |
| High Wind Watch | 2 |
| Wind Advisory | 5 |
| Fog and smoke | |
| Dense Fog Advisory | 7 |
| Freezing Fog Advisory | 1 |
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.