Alert archive / Michigan / Cass County
Weather alerts in Cass County, Michigan, 2018
107 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cass County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 107
- Warnings
- 26
- Watches
- 6
- Advisories
- 37
- Busiest month
- May20 alerts
- Busiest day
- May 14, 20185 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Cass County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 11 | 9 | 18% | 11 | 55% | 18 min |
| Flash flood warnings | 1 | 0 | 100% | 1 | 0% |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Northern Indiana: tornado warnings | 6 | 2 | 67% | 6 | 33% | 2 min |
| NWS Northern Indiana: severe thunderstorm warnings | 93 | 34 | 63% | 187 | 41% | 19 min |
| NWS Northern Indiana: flash flood warnings | 9 | 2 | 78% | 4 | 75% | 59 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, 3:43 AM EST | Winter Weather Advisory | IWX | 3 days |
| Jan 2, 3:06 PM EST | Wind Chill Advisory | IWX | 16 hr |
| Jan 3, 2:51 PM EST | Winter Storm Warning | IWX | 64 hr |
| Jan 7, 3:55 AM EST | Winter Weather Advisory | IWX | 31 hr |
| Jan 10, 10:11 AM EST | Dense Fog Advisory | IWX | 12 hr |
| Jan 11, 3:02 PM EST | Winter Weather Advisory | IWX | 27 hr |
| Jan 12, 3:04 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 14, 3:16 PM EST | Winter Weather Advisory | IWX | 34 hr |
| Jan 21, 5:01 AM EST | Dense Fog Advisory | IWX | 26 hr |
| Jan 22, 10:13 PM EST | Special Weather Statement | IWX | 32 min |
| Feb 3, 11:16 AM EST | Winter Weather Advisory | IWX | 34 hr |
| Feb 5, 3:28 AM EST | Winter Weather Advisory | IWX | 23 hr |
| Feb 6, 2:45 PM EST | Winter Weather Advisory | IWX | 19 hr |
| Feb 7, 4:06 AM EST | Winter Storm Watch | IWX | 35 hr |
| Feb 8, 3:38 AM EST | Winter Storm Warning | IWX | 42 hr |
| Feb 9, 4:08 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 10, 2:52 PM EST | Winter Weather Advisory | IWX | 22 hr |
| Feb 14, 6:51 PM EST | Dense Fog Advisory | IWX | 27 hr |
| Feb 19, 1:10 AM EST | Flood Watch | IWX | 63 hr |
| Feb 20, 3:19 AM EST | Areal Flood Warning | IWX | 24 hr |
| Feb 20, 5:12 AM EST | River Flood Warning | IWX | 14 days |
| Feb 20, 5:12 AM EST | River Flood Warning | IWX | 16 days |
| Feb 20, 11:56 PM EST | Areal Flood Warning | IWX | 48 hr |
| Feb 22, 11:38 PM EST | Areal Flood Warning | IWX | 60 hr |
| Feb 25, 1:35 AM EST | Wind Advisory | IWX | 8 hr |
| Mar 31, 4:11 AM EDT | Wind Advisory | IWX | 15 hr |
| Apr 3, 4:54 PM EDT | Special Weather Statement | IWX | 36 min |
| Apr 30, 6:21 PM EDT | Red Flag Warning | IWX | 26 hr |
| May 2, 6:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| May 2, 7:39 PM EDT | Severe Thunderstorm Warning | IWX | 51 min |
| May 2, 8:28 PM EDT | Severe Thunderstorm Warning | IWX | 47 min |
| May 2, 9:27 PM EDT | Special Weather Statement | IWX | 33 min |
| May 2, 9:53 PM EDT | Flash Flood Watch | IWX | 11 hr |
| May 2, 10:24 PM EDT | Severe Thunderstorm Warning | IWX | 51 min |
| May 3, 9:48 PM EDT | Wind Advisory | IWX | 18 hr |
| May 9, 10:21 AM EDT | Special Weather Statement | IWX | 39 min |
| May 9, 10:45 AM EDT | Special Weather Statement | IWX | 45 min |
| May 9, 11:14 AM EDT | Special Weather Statement | IWX | 31 min |
| May 9, 8:38 PM EDT | Special Weather Statement | IWX | 37 min |
| May 14, 3:40 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 14, 5:44 AM EDT | Special Weather Statement | IWX | 46 min |
| May 14, 8:42 AM EDT | Areal Flood Warning | IWX | 3 hr |
| May 14, 11:41 AM EDT | River Flood Warning | IWX | 3 days |
| May 14, 7:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| May 14, 8:51 PM EDT | Special Weather Statement | IWX | 24 min |
| May 15, 12:10 AM EDT | Areal Flood Advisory | IWX | 6 hr |
| May 15, 8:36 AM EDT | River Flood Warning | IWX | 37 hr |
| May 22, 3:08 AM EDT | Dense Fog Advisory | IWX | 7 hr |
| Jun 9, 3:02 PM EDT | Special Weather Statement | IWX | 43 min |
| Jun 9, 4:55 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Jun 9, 5:05 PM EDT | Flash Flood Warning | IWX | 3 hr |
| Jun 16, 3:34 PM EDT | Heat Advisory | IWX | 52 hr |
| Jun 20, 3:12 AM EDT | Special Weather Statement | IWX | 48 min |
| Jun 21, 6:18 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Jun 22, 6:47 AM EDT | Areal Flood Advisory | IWX | 3 hr |
| Jun 27, 3:28 PM EDT | Excessive Heat Watch | IWX | 36 hr |
| Jun 29, 2:58 AM EDT | Excessive Heat Warning | IWX | 65 hr |
| Jul 1, 7:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Jul 1, 8:19 PM EDT | Special Weather Statement | IWX | 56 min |
| Jul 3, 2:26 PM EDT | Heat Advisory | IWX | 37 hr |
| Jul 5, 12:08 AM EDT | Special Weather Statement | IWX | 22 min |
| Jul 15, 5:27 PM EDT | Areal Flood Advisory | IWX | 88 min |
| Jul 16, 1:32 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 20, 1:43 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jul 20, 2:04 PM EDT | Special Weather Statement | IWX | 56 min |
| Jul 20, 2:12 PM EDT | Tornado Watch | SPC | 3 hr |
| Jul 20, 2:24 PM EDT | Severe Thunderstorm Warning | IWX | 51 min |
| Aug 2, 5:21 PM EDT | Severe Thunderstorm Warning | IWX | 24 min |
| Aug 2, 5:32 PM EDT | Special Weather Statement | IWX | 43 min |
| Aug 2, 6:18 PM EDT | Special Weather Statement | IWX | 42 min |
| Aug 2, 6:52 PM EDT | Severe Thunderstorm Warning | IWX | 38 min |
| Aug 6, 7:03 PM EDT | Severe Thunderstorm Warning | IWX | 24 min |
| Aug 6, 8:13 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Aug 9, 6:03 PM EDT | Special Weather Statement | IWX | 42 min |
| Aug 18, 3:47 AM EDT | Dense Fog Advisory | IWX | 5 hr |
| Aug 21, 2:49 AM EDT | Areal Flood Advisory | IWX | 3 hr |
| Aug 28, 10:54 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Sep 3, 3:26 PM EDT | Special Weather Statement | IWX | 64 min |
| Sep 3, 3:34 PM EDT | Severe Thunderstorm Warning | IWX | 41 min |
| Sep 3, 3:44 PM EDT | Special Weather Statement | IWX | 46 min |
| Sep 3, 4:10 PM EDT | Special Weather Statement | IWX | 80 min |
| Sep 5, 7:01 PM EDT | Special Weather Statement | IWX | 29 min |
| Sep 5, 9:06 PM EDT | Special Weather Statement | IWX | 54 min |
| Sep 11, 2:28 AM EDT | Dense Fog Advisory | IWX | 6 hr |
| Sep 20, 3:52 PM EDT | Special Weather Statement | IWX | 23 min |
| Sep 20, 4:16 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 20, 5:03 PM EDT | Severe Thunderstorm Warning | IWX | 42 min |
| Sep 20, 5:18 PM EDT | Severe Thunderstorm Warning | IWX | 28 min |
| Sep 20, 5:40 PM EDT | Areal Flood Advisory | IWX | 3 hr |
| Sep 25, 6:21 PM EDT | Mesoscale Discussion | SPC | 114 min |
| Sep 25, 8:32 PM EDT | Severe Thunderstorm Warning | IWX | 43 min |
| Sep 25, 8:45 PM EDT | Severe Thunderstorm Watch | SPC | 87 min |
| Oct 6, 1:04 AM EDT | Areal Flood Advisory | IWX | 3 hr |
| Oct 12, 2:55 PM EDT | Frost Advisory | IWX | 18 hr |
| Oct 15, 2:17 PM EDT | Freeze Warning | IWX | 19 hr |
| Oct 17, 3:02 AM EDT | Freeze Warning | IWX | 30 hr |
| Oct 20, 10:57 AM EDT | Wind Advisory | IWX | 9 hr |
| Nov 9, 8:35 PM EST | Special Weather Statement | IWX | 115 min |
| Nov 9, 10:34 PM EST | Special Weather Statement | IWX | 56 min |
| Nov 10, 3:24 AM EST | Special Weather Statement | IWX | 51 min |
| Nov 25, 3:38 AM EST | Winter Weather Advisory | IWX | 33 hr |
| Nov 30, 8:17 PM EST | Freezing Fog Advisory | IWX | 10 hr |
| Dec 14, 10:08 PM EST | Dense Fog Advisory | IWX | 7 hr |
| Dec 16, 7:40 AM EST | Freezing Fog Advisory | IWX | 5 hr |
| Dec 27, 2:44 PM EST | Wind Advisory | IWX | 6 hr |
| Dec 29, 9:45 AM EST | Winter Weather Advisory | IWX | 2 hr |
| Dec 29, 7:37 PM EST | Special Weather Statement | IWX | 53 min |
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 archive20172019
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.