Alert archive / Indiana / Porter County
Weather alerts in Porter County, Indiana, 2024
121 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Porter County and its neighbors
Each county as a circle sized by its count in 2024. Tap one for its archive.
- Alerts
- 121
- Warnings
- 19
- Watches
- 20
- Advisories
- 28
- Busiest month
- July21 alerts
- Busiest day
- July 15, 20249 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 Porter County in 2024 had a tornado report inside them.
Porter County, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 11 | 5 | 55% | 21 | 86% | 32 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2024
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 34 | 20 | 41% | 58 | 69% | 17 min |
| NWS Chicago, IL: severe thunderstorm warnings | 155 | 88 | 43% | 549 | 79% | 30 min |
| NWS Chicago, IL: flash flood warnings | 22 | 6 | 73% | 72 | 72% | 85 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 8, 3:00 AM CST | Winter Weather Advisory | LOT | 47 hr |
| Jan 10, 2:18 PM CST | Winter Storm Watch | LOT | 24 hr |
| Jan 11, 2:22 PM CST | Winter Weather Advisory | LOT | 46 hr |
| Jan 12, 9:31 AM CST | Winter Weather Advisory | LOT | 26 hr |
| Jan 13, 3:29 AM CST | Wind Chill Advisory | LOT | 4 days |
| Jan 13, 2:17 PM CST | Wind Chill Warning | LOT | 70 hr |
| Jan 14, 3:32 AM CST | Wind Chill Advisory | LOT | 3 days |
| Jan 17, 1:51 PM CST | Winter Storm Watch | LOT | 46 hr |
| Jan 18, 3:41 AM CST | Winter Storm Warning | LOT | 32 hr |
| Jan 19, 11:51 AM CST | Winter Storm Warning | LOT | 21 hr |
| Jan 21, 2:42 PM CST | Winter Weather Advisory | LOT | 42 hr |
| Jan 22, 9:17 AM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 23, 1:57 PM CST | Dense Fog Advisory | LOT | 22 hr |
| Jan 23, 2:04 PM CST | Flood Watch | LOT | 4 days |
| Jan 24, 2:57 PM CST | Dense Fog Advisory | LOT | 30 hr |
| Jan 26, 8:39 AM CST | Dense Fog Advisory | LOT | 5 hr |
| Jan 26, 1:22 PM CST | Dense Fog Advisory | LOT | 33 hr |
| Feb 6, 1:34 AM CST | Dense Fog Advisory | LOT | 10 hr |
| Feb 8, 8:44 PM CST | Special Weather Statement | LOT | 16 min |
| Feb 8, 9:00 PM CST | Special Weather Statement | LOT | 30 min |
| Feb 27, 2:50 PM CST | Mesoscale Discussion | SPC | 115 min |
| Feb 27, 3:53 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 27, 5:59 PM CST | Mesoscale Discussion | SPC | 91 min |
| Mar 14, 8:29 AM CDT | Special Weather Statement | LOT | 31 min |
| Mar 26, 11:33 AM CDT | Special Weather Statement | LOT | 42 min |
| Apr 1, 7:02 PM CDT | Areal Flood Advisory | LOT | 2 hr |
| Apr 1, 9:11 PM CDT | River Flood Watch | LOT | 39 hr |
| Apr 2, 3:15 AM CDT | Wind Advisory | LOT | 17 hr |
| Apr 3, 11:59 AM CDT | River Flood Warning | LOT | 5 days |
| Apr 17, 9:40 AM CDT | Mesoscale Discussion | SPC | 65 min |
| Apr 20, 8:47 PM CDT | Frost Advisory | LOT | 11 hr |
| Apr 21, 2:29 PM CDT | Frost Advisory | LOT | 18 hr |
| Apr 24, 2:58 PM CDT | Frost Advisory | LOT | 17 hr |
| May 2, 3:07 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 2, 4:32 PM CDT | Special Weather Statement | LOT | 13 min |
| May 4, 8:00 PM CDT | Special Weather Statement | LOT | 30 min |
| May 7, 12:14 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 7, 1:28 PM CDT | Tornado Watch | SPC | 12 hr |
| May 7, 2:47 PM CDT | Severe Thunderstorm Warning | LOT | 43 min |
| May 7, 2:53 PM CDT | Mesoscale Discussion | SPC | 67 min |
| May 17, 2:42 AM CDT | Dense Fog Advisory | LOT | 6 hr |
| May 20, 3:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| May 20, 4:45 PM CDT | Special Weather Statement | LOT | 45 min |
| May 20, 6:17 PM CDT | Severe Thunderstorm Warning | LOT | 43 min |
| May 20, 7:00 PM CDT | Severe Thunderstorm Warning | LOT | 60 min |
| May 21, 10:20 PM CDT | Wind Advisory | LOT | 6 hr |
| May 24, 6:07 AM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 24, 1:35 PM CDT | Severe Thunderstorm Warning | LOT | 55 min |
| May 27, 7:47 PM CDT | Special Weather Statement | LOT | 28 min |
| May 28, 3:03 PM CDT | Beach Hazards Statement | LOT | 36 hr |
| May 28, 5:15 PM CDT | Special Weather Statement | LOT | 45 min |
| Jun 5, 2:04 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jun 7, 3:28 AM CDT | Beach Hazards Statement | LOT | 9 hr |
| Jun 9, 3:17 AM CDT | Beach Hazards Statement | LOT | 46 hr |
| Jun 13, 1:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 13, 1:50 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 13, 4:46 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jun 13, 5:25 PM CDT | Severe Thunderstorm Warning | LOT | 35 min |
| Jun 13, 10:51 PM CDT | Special Weather Statement | LOT | 24 min |
| Jun 16, 2:15 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 22, 10:43 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 4:37 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 25, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 25, 6:28 AM CDT | Mesoscale Discussion | SPC | 92 min |
| Jun 26, 3:47 AM CDT | Beach Hazards Statement | LOT | 36 hr |
| Jun 29, 3:58 AM CDT | Beach Hazards Statement | LOT | 51 hr |
| Jul 9, 2:20 AM CDT | Flood Watch | LOT | 30 hr |
| Jul 9, 3:02 PM CDT | Beach Hazards Statement | LOT | 25 hr |
| Jul 9, 10:09 PM CDT | River Flood Watch | LOT | 6 days |
| Jul 14, 9:08 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 9:37 AM CDT | Severe Thunderstorm Warning | LOT | 27 min |
| Jul 14, 12:30 PM CDT | River Flood Watch | LOT | 18 hr |
| Jul 14, 3:03 PM CDT | Flood Watch | LOT | 11 hr |
| Jul 14, 5:55 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 14, 9:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jul 14, 11:00 PM CDT | Severe Thunderstorm Warning | LOT | 60 min |
| Jul 15, 12:25 AM CDT | Severe Thunderstorm Warning | LOT | 34 min |
| Jul 15, 12:54 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 15, 6:25 AM CDT | River Flood Warning | LOT | 6 days |
| Jul 15, 12:52 PM CDT | Flood Watch | LOT | 14 hr |
| Jul 15, 1:59 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 15, 6:06 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 15, 6:53 PM CDT | Tornado Watch | SPC | 6 hr |
| Jul 15, 9:35 PM CDT | Severe Thunderstorm Warning | LOT | 70 min |
| Jul 15, 9:59 PM CDT | Tornado Warning | LOT | 31 min |
| Jul 15, 10:13 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 2:19 PM CDT | Beach Hazards Statement | LOT | 29 hr |
| Aug 5, 7:47 AM CDT | Severe Thunderstorm Warning | LOT | 43 min |
| Aug 5, 7:54 AM CDT | Severe Thunderstorm Warning | LOT | 51 min |
| Aug 5, 8:29 AM CDT | Special Weather Statement | LOT | 46 min |
| Aug 5, 2:59 PM CDT | Beach Hazards Statement | LOT | 54 hr |
| Aug 8, 3:25 AM CDT | Beach Hazards Statement | LOT | 67 hr |
| Aug 16, 8:52 PM CDT | Special Weather Statement | LOT | 23 min |
| Aug 17, 3:42 AM CDT | Beach Hazards Statement | LOT | 4 days |
| Aug 24, 2:32 PM CDT | Excessive Heat Watch | LOT | 48 hr |
| Aug 26, 2:32 PM CDT | Heat Advisory | LOT | 30 hr |
| Aug 27, 11:25 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 27, 4:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Aug 27, 4:54 PM CDT | Beach Hazards Statement | LOT | 11 hr |
| Aug 27, 4:54 PM CDT | Lakeshore Flood Advisory | LOT | 11 hr |
| Aug 27, 5:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 27, 6:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Aug 27, 8:00 PM CDT | Special Weather Statement | LOT | 30 min |
| Aug 27, 8:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 27, 9:21 PM CDT | Areal Flood Advisory | LOT | 109 min |
| Aug 30, 3:07 PM CDT | Beach Hazards Statement | LOT | 68 hr |
| Sep 5, 9:50 AM CDT | Beach Hazards Statement | LOT | 66 hr |
| Sep 7, 8:22 AM CDT | Special Weather Statement | LOT | 38 min |
| Sep 20, 11:39 PM CDT | Dense Fog Advisory | LOT | 9 hr |
| Sep 21, 9:34 PM CDT | Beach Hazards Statement | LOT | 47 hr |
| Sep 24, 1:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 26, 3:12 PM CDT | Beach Hazards Statement | LOT | 4 days |
| Oct 14, 7:54 PM CDT | Special Weather Statement | LOT | 36 min |
| Oct 16, 1:54 PM CDT | Freeze Warning | LOT | 19 hr |
| Oct 28, 1:59 PM CDT | Fire Weather Watch | LOT | 13 hr |
| Oct 29, 2:43 AM CDT | Red Flag Warning | LOT | 18 hr |
| Nov 4, 1:57 PM CST | Wind Advisory | LOT | 22 hr |
| Nov 21, 3:58 AM CST | Winter Weather Advisory | LOT | 11 hr |
| Nov 21, 3:59 AM CST | Wind Advisory | LOT | 10 hr |
| Dec 4, 2:19 AM CST | Wind Advisory | LOT | 22 hr |
| Dec 15, 3:12 PM CST | Dense Fog Advisory | LOT | 20 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 | 11 |
| Tornado Warning | 1 |
| Severe Thunderstorm Watch | 6 |
| Tornado Watch | 3 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 15 |
| Flooding | |
| River Flood Warning | 2 |
| Flood Watch | 4 |
| River Flood Watch | 3 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 5 |
| Heat | |
| Excessive Heat Watch | 1 |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 1 |
| Wind Chill Warning | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 8 |
| Coast and beach | |
| Lakeshore Flood Advisory | 1 |
| Beach Hazards Statement | 15 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20232025
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.