Alert archive / Indiana / Cass County
Weather alerts in Cass County, Indiana, 2009
105 weather alerts in 2009, 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 2009. Tap one for its archive.
- Alerts
- 105
- Warnings
- 26
- Watches
- 20
- Advisories
- 27
- Busiest month
- March15 alerts
- Busiest day
- March 8, 200910 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 Cass County in 2009 had a tornado report inside them.
Cass County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 6 | 3 | 50% | 5 | 80% | 41 min |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 112 min |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Northern Indiana: tornado warnings | 12 | 3 | 75% | 7 | 100% | 22 min |
| NWS Northern Indiana: severe thunderstorm warnings | 59 | 25 | 58% | 90 | 77% | 26 min |
| NWS Northern Indiana: flash flood warnings | 15 | 3 | 80% | 7 | 86% | 100 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 6, 4:58 AM EST | Winter Weather Advisory | IWX | 28 hr |
| Jan 9, 4:47 AM EST | Winter Weather Advisory | IWX | 38 hr |
| Jan 10, 12:53 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 12, 4:01 PM EST | Blizzard Watch | IWX | 23 hr |
| Jan 12, 4:01 PM EST | Winter Weather Advisory | IWX | 23 hr |
| Jan 14, 12:38 AM EST | Mesoscale Discussion | SPC | 4 hr |
| Jan 14, 5:22 AM EST | Wind Chill Warning | IWX | 55 hr |
| Jan 14, 5:22 AM EST | Winter Weather Advisory | IWX | 14 hr |
| Jan 16, 12:05 PM EST | Wind Chill Advisory | IWX | 7 hr |
| Jan 16, 7:26 PM EST | Wind Chill Warning | IWX | 12 hr |
| Jan 27, 4:10 AM EST | Winter Weather Advisory | IWX | 33 hr |
| Feb 10, 4:40 AM EST | Flood Watch | IWX | 44 hr |
| Feb 10, 4:41 AM EST | High Wind Watch | IWX | 11 hr |
| Feb 10, 3:35 PM EST | High Wind Warning | IWX | 37 hr |
| Feb 11, 10:56 AM EST | Areal Flood Warning | IWX | 6 hr |
| Feb 11, 11:10 AM EST | River Flood Warning | IWX | 71 hr |
| Feb 11, 11:10 AM EST | River Flood Warning | IWX | 35 hr |
| Feb 11, 3:16 PM EST | Mesoscale Discussion | SPC | 89 min |
| Feb 11, 4:45 PM EST | Areal Flood Warning | IWX | 9 hr |
| Feb 12, 4:06 AM EST | Wind Advisory | IWX | 14 hr |
| Feb 20, 3:48 PM EST | Winter Weather Advisory | IWX | 24 hr |
| Feb 26, 4:04 AM EST | Dense Fog Advisory | IWX | 8 hr |
| Mar 6, 2:39 PM EST | Flood Watch | IWX | 52 hr |
| Mar 7, 10:22 PM EST | River Flood Warning | IWX | 7 days |
| Mar 8, 5:13 AM EDT | Wind Advisory | IWX | 12 hr |
| Mar 8, 7:43 AM EDT | Areal Flood Advisory | IWX | 6 hr |
| Mar 8, 10:57 AM EDT | Areal Flood Warning | IWX | 6 hr |
| Mar 8, 11:48 AM EDT | River Flood Warning | IWX | 3 days |
| Mar 8, 2:52 PM EDT | Tornado Watch | SPC | 5 hr |
| Mar 8, 3:14 PM EDT | Tornado Warning | IWX | 46 min |
| Mar 8, 3:20 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Mar 8, 4:06 PM EDT | Severe Thunderstorm Warning | IWX | 54 min |
| Mar 8, 5:25 PM EDT | High Wind Warning | IWX | 7 hr |
| Mar 9, 4:21 AM EDT | Flash Flood Watch | IWX | 45 hr |
| Mar 10, 4:23 AM EDT | Wind Advisory | IWX | 30 hr |
| Mar 10, 9:04 PM EDT | Areal Flood Warning | IWX | 21 hr |
| Mar 11, 6:04 PM EDT | Areal Flood Warning | IWX | 12 hr |
| Apr 2, 11:27 AM EDT | River Flood Watch | IWX | 25 hr |
| Apr 2, 9:02 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Apr 5, 11:18 AM EDT | River Flood Watch | IWX | 11 hr |
| Apr 5, 11:50 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 5, 10:13 PM EDT | River Flood Warning | IWX | 60 hr |
| Apr 5, 10:13 PM EDT | River Flood Warning | IWX | 24 hr |
| Apr 27, 4:26 AM EDT | Wind Advisory | IWX | 11 hr |
| May 13, 11:17 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 13, 11:51 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 15, 4:17 PM EDT | Flood Watch | IWX | 12 hr |
| May 15, 6:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 15, 7:39 PM EDT | Tornado Watch | SPC | 6 hr |
| May 15, 8:04 PM EDT | Special Weather Statement | IWX | 56 min |
| May 15, 9:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 9:53 PM EDT | Flash Flood Warning | IWX | 6 hr |
| May 15, 10:00 PM EDT | Special Weather Statement | IWX | 2 hr |
| May 15, 11:24 PM EDT | Severe Thunderstorm Warning | IWX | 56 min |
| May 16, 5:22 AM EDT | River Flood Warning | IWX | 17 hr |
| May 17, 3:51 AM EDT | Frost Advisory | IWX | 28 hr |
| May 29, 4:17 PM EDT | Mesoscale Discussion | SPC | 88 min |
| May 30, 7:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 30, 7:29 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 1, 3:37 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 6:31 PM EDT | Flash Flood Watch | IWX | 7 hr |
| Jun 1, 7:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 1, 11:10 PM EDT | Areal Flood Advisory | IWX | 6 hr |
| Jun 1, 11:25 PM EDT | Special Weather Statement | IWX | 50 min |
| Jun 19, 3:38 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 19, 4:16 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 19, 11:27 AM EDT | Mesoscale Discussion | SPC | 63 min |
| Jun 19, 11:50 AM EDT | Tornado Watch | SPC | 7 hr |
| Jun 19, 2:37 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jun 19, 6:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 19, 6:37 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 19, 6:59 PM EDT | Tornado Watch | SPC | 8 hr |
| Jun 19, 8:41 PM EDT | Special Weather Statement | IWX | 64 min |
| Jun 19, 9:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jul 25, 12:46 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 28, 4:51 PM EDT | Special Weather Statement | IWX | 54 min |
| Jul 28, 9:54 PM EDT | Special Weather Statement | IWX | 51 min |
| Aug 9, 3:40 AM EDT | Heat Advisory | IWX | 16 hr |
| Aug 11, 12:39 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 11, 4:47 PM EDT | Special Weather Statement | IWX | 58 min |
| Aug 11, 5:12 PM EDT | Areal Flood Advisory | IWX | 93 min |
| Aug 17, 5:01 PM EDT | Special Weather Statement | IWX | 44 min |
| Aug 17, 9:14 PM EDT | Severe Thunderstorm Warning | IWX | 33 min |
| Aug 19, 5:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Aug 19, 6:11 PM EDT | Tornado Watch | SPC | 5 hr |
| Aug 19, 6:59 PM EDT | Severe Thunderstorm Warning | IWX | 61 min |
| Aug 19, 7:53 PM EDT | Severe Thunderstorm Warning | IWX | 52 min |
| Aug 20, 7:45 AM EDT | Special Weather Statement | IWX | 60 min |
| Sep 9, 9:16 PM EDT | Dense Fog Advisory | IWX | 12 hr |
| Sep 27, 11:04 AM EDT | Wind Advisory | IWX | 35 hr |
| Sep 27, 10:46 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 27, 11:59 PM EDT | Special Weather Statement | IWX | 31 min |
| Sep 28, 12:26 AM EDT | Special Weather Statement | IWX | 64 min |
| Sep 28, 12:40 AM EDT | Severe Thunderstorm Warning | IWX | 37 min |
| Sep 30, 4:07 AM EDT | Frost Advisory | IWX | 29 hr |
| Oct 10, 4:19 AM EDT | Freeze Warning | IWX | 29 hr |
| Nov 23, 11:06 PM EST | Dense Fog Advisory | IWX | 10 hr |
| Dec 7, 3:34 PM EST | High Wind Watch | IWX | 22 hr |
| Dec 8, 1:32 PM EST | Wind Advisory | IWX | 9 hr |
| Dec 8, 6:40 PM EST | Winter Weather Advisory | IWX | 6 hr |
| Dec 8, 10:24 PM EST | High Wind Warning | IWX | 20 hr |
| Dec 23, 4:20 AM EST | Winter Weather Advisory | IWX | 33 hr |
| Dec 24, 1:08 PM EST | Freezing Rain Advisory | IWX | 9 hr |
| Dec 26, 5:27 PM EST | Winter Weather Advisory | IWX | 8 hr |
| Dec 27, 4:11 AM EST | Winter Weather Advisory | IWX | 15 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 archive20082010
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.