Alert archive / Michigan / Bay County
Weather alerts in Bay County, Michigan, 2019
101 weather alerts in 2019, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Bay County and its neighbors
Each county as a circle sized by its count in 2019. Tap one for its archive.
- Alerts
- 101
- Warnings
- 23
- Watches
- 13
- Advisories
- 41
- Busiest month
- July17 alerts
- Busiest day
- July 20, 20197 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Bay County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 3 | 3 | 0% | 0 | ||
| Flash flood warnings | 1 | 0 | 100% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Detroit, MI: tornado warnings | 11 | 2 | 82% | 8 | 88% | 14 min |
| NWS Detroit, MI: severe thunderstorm warnings | 84 | 59 | 30% | 162 | 73% | 19 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 15, 2:58 PM EST | Winter Weather Advisory | DTX | 19 hr |
| Jan 20, 2:44 AM EST | Wind Chill Advisory | DTX | 33 hr |
| Jan 22, 3:05 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Jan 26, 4:05 PM EST | Winter Storm Watch | DTX | 12 hr |
| Jan 27, 3:43 AM EST | Winter Storm Warning | DTX | 40 hr |
| Jan 28, 8:18 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 28, 4:34 PM EST | Wind Chill Watch | DTX | 8 hr |
| Jan 29, 12:23 AM EST | Wind Chill Warning | DTX | 62 hr |
| Jan 31, 1:51 PM EST | Wind Chill Advisory | DTX | 19 hr |
| Feb 5, 3:35 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Feb 5, 9:54 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 6, 3:00 PM EST | Winter Weather Advisory | DTX | 25 hr |
| Feb 7, 3:02 AM EST | Wind Advisory | DTX | 31 hr |
| Feb 7, 7:05 PM EST | Special Weather Statement | DTX | 55 min |
| Feb 10, 3:36 PM EST | Winter Storm Watch | DTX | 24 hr |
| Feb 11, 4:03 PM EST | Winter Storm Warning | DTX | 20 hr |
| Feb 11, 4:03 PM EST | Winter Weather Advisory | DTX | 48 hr |
| Feb 12, 3:51 PM EST | Special Weather Statement | DTX | 69 min |
| Feb 19, 12:23 PM EST | Winter Weather Advisory | DTX | 34 hr |
| Feb 22, 11:00 AM EST | High Wind Watch | DTX | 29 hr |
| Feb 23, 3:43 PM EST | High Wind Warning | DTX | 36 hr |
| Feb 26, 2:45 PM EST | Winter Weather Advisory | DTX | 22 hr |
| Mar 9, 2:56 PM EST | Winter Weather Advisory | DTX | 10 hr |
| Mar 10, 3:03 AM EDT | Wind Advisory | DTX | 13 hr |
| Mar 13, 12:18 PM EDT | Flood Watch | DTX | 39 hr |
| Mar 14, 6:08 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Mar 15, 8:59 AM EDT | River Flood Warning | DTX | 5 days |
| Apr 13, 1:12 PM EDT | Coastal Flood Watch | DTX | 14 hr |
| Apr 14, 2:40 AM EDT | Winter Weather Advisory | DTX | 25 hr |
| Apr 14, 3:09 AM EDT | Lakeshore Flood Warning | DTX | 25 hr |
| Apr 18, 2:42 PM EDT | Lakeshore Flood Advisory | DTX | 55 hr |
| Apr 20, 10:05 AM EDT | River Flood Warning | DTX | 13 hr |
| Apr 22, 10:17 AM EDT | Red Flag Warning | DTX | 8 hr |
| Apr 29, 4:06 AM EDT | Lakeshore Flood Advisory | DTX | 18 hr |
| Apr 30, 3:30 PM EDT | Lakeshore Flood Advisory | DTX | 24 hr |
| May 7, 11:06 AM EDT | Lakeshore Flood Advisory | DTX | 51 hr |
| May 10, 12:44 PM EDT | Frost Advisory | DTX | 19 hr |
| May 11, 1:41 PM EDT | Lakeshore Flood Advisory | DTX | 56 hr |
| May 25, 1:41 AM EDT | Special Weather Statement | DTX | 2 hr |
| May 25, 12:50 PM EDT | River Flood Warning | DTX | 4 days |
| May 27, 10:11 AM EDT | Lakeshore Flood Advisory | DTX | 31 hr |
| May 31, 10:59 PM EDT | Special Weather Statement | DTX | 61 min |
| Jun 5, 9:43 PM EDT | Lakeshore Flood Statement | DTX | 2 hr |
| Jun 8, 3:21 AM EDT | Lakeshore Flood Advisory | DTX | 21 hr |
| Jun 10, 9:25 PM EDT | River Flood Warning | DTX | 4 days |
| Jun 12, 2:10 PM EDT | Lakeshore Flood Advisory | DTX | 38 hr |
| Jun 15, 2:31 PM EDT | Lakeshore Flood Advisory | DTX | 49 hr |
| Jun 19, 9:50 AM EDT | Lakeshore Flood Advisory | DTX | 36 hr |
| Jun 20, 4:20 PM EDT | River Flood Warning | DTX | 69 hr |
| Jun 28, 7:19 AM EDT | Special Weather Statement | DTX | 56 min |
| Jun 28, 7:42 AM EDT | Special Weather Statement | DTX | 63 min |
| Jun 28, 8:16 AM EDT | Areal Flood Advisory | DTX | 3 hr |
| Jun 30, 4:03 AM EDT | Lakeshore Flood Advisory | DTX | 18 hr |
| Jul 5, 1:23 PM EDT | Special Weather Statement | DTX | 67 min |
| Jul 5, 3:55 PM EDT | Special Weather Statement | DTX | 50 min |
| Jul 6, 3:10 AM EDT | Lakeshore Flood Advisory | DTX | 53 hr |
| Jul 6, 7:18 PM EDT | River Flood Warning | DTX | 14 hr |
| Jul 17, 8:55 AM EDT | Lakeshore Flood Advisory | DTX | 17 hr |
| Jul 18, 4:12 AM EDT | Heat Advisory | DTX | 63 hr |
| Jul 19, 10:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jul 20, 1:35 AM EDT | Special Weather Statement | DTX | 85 min |
| Jul 20, 12:31 PM EDT | Lakeshore Flood Statement | DTX | 2 hr |
| Jul 20, 2:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 20, 4:44 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 4:53 PM EDT | Special Weather Statement | DTX | 67 min |
| Jul 20, 5:17 PM EDT | Severe Thunderstorm Warning | DTX | 37 min |
| Jul 21, 9:58 PM EDT | Lakeshore Flood Advisory | DTX | 24 hr |
| Jul 22, 4:29 AM EDT | Beach Hazards Statement | DTX | 16 hr |
| Jul 23, 2:58 PM EDT | Special Weather Statement | DTX | 47 min |
| Jul 29, 2:11 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 12, 9:23 PM EDT | Lakeshore Flood Advisory | DTX | 55 hr |
| Aug 13, 3:46 AM EDT | Beach Hazards Statement | DTX | 18 hr |
| Aug 18, 12:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Sep 10, 6:28 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 10, 6:32 PM EDT | Severe Thunderstorm Warning | DTX | 58 min |
| Sep 10, 7:28 PM EDT | Severe Thunderstorm Warning | DTX | 62 min |
| Sep 11, 2:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 11, 4:33 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Sep 12, 3:35 AM EDT | Lakeshore Flood Advisory | DTX | 18 hr |
| Sep 12, 5:37 AM EDT | River Flood Warning | DTX | 17 hr |
| Oct 1, 2:55 PM EDT | Flood Watch | DTX | 24 hr |
| Oct 2, 12:27 AM EDT | Flash Flood Warning | DTX | 3 hr |
| Oct 2, 4:26 AM EDT | Lakeshore Flood Advisory | DTX | 18 hr |
| Oct 2, 5:57 AM EDT | River Flood Warning | DTX | 4 days |
| Oct 4, 3:58 AM EDT | Lakeshore Flood Statement | DTX | 6 hr |
| Oct 14, 3:04 AM EDT | Frost Advisory | DTX | 29 hr |
| Oct 15, 10:01 PM EDT | Special Weather Statement | DTX | 59 min |
| Oct 17, 3:28 PM EDT | Freeze Warning | DTX | 17 hr |
| Oct 28, 10:02 AM EDT | River Flood Warning | DTX | 11 hr |
| Oct 30, 3:52 AM EDT | Lakeshore Flood Warning | DTX | 42 hr |
| Oct 30, 3:52 AM EDT | Lakeshore Flood Advisory | DTX | 48 hr |
| Oct 31, 3:10 AM EDT | Wind Advisory | DTX | 25 hr |
| Oct 31, 5:30 AM EDT | River Flood Warning | DTX | 4 days |
| Nov 10, 3:10 AM EST | Lakeshore Flood Advisory | DTX | 61 hr |
| Nov 10, 3:11 PM EST | Winter Weather Advisory | DTX | 36 hr |
| Nov 30, 3:23 AM EST | Winter Storm Watch | DTX | 10 hr |
| Nov 30, 3:23 AM EST | Winter Weather Advisory | DTX | 33 hr |
| Nov 30, 6:34 AM EST | Lakeshore Flood Advisory | DTX | 63 hr |
| Dec 1, 6:20 AM EST | Ice Storm Warning | DTX | 4 hr |
| Dec 29, 4:06 AM EST | Flood Watch | DTX | 30 hr |
| Dec 29, 8:48 PM EST | Wind Advisory | DTX | 19 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 archive20182020
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.