Alert archive / Indiana / Porter County
Weather alerts in Porter County, Indiana, 2018
110 weather alerts in 2018, 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 2018. Tap one for its archive.
- Alerts
- 110
- Warnings
- 17
- Watches
- 12
- Advisories
- 43
- Busiest month
- May17 alerts
- Busiest day
- May 3, 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.
Porter County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 5 | 29% | 7 | 57% | 13 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 3 | 1 | 67% | 9 | 33% | 0 min |
| NWS Chicago, IL: severe thunderstorm warnings | 74 | 38 | 49% | 157 | 60% | 22 min |
| NWS Chicago, IL: flash flood warnings | 12 | 8 | 33% | 32 | 69% | 74 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 3, 2:57 AM CST | Winter Weather Advisory | LOT | 45 hr |
| Jan 7, 2:53 AM CST | Winter Weather Advisory | LOT | 27 hr |
| Jan 7, 1:49 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 7, 2:00 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 7, 6:16 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 8, 9:53 PM CST | Dense Fog Advisory | LOT | 14 hr |
| Jan 10, 8:56 AM CST | Dense Fog Advisory | LOT | 10 hr |
| Jan 11, 3:58 AM CST | Winter Weather Advisory | LOT | 32 hr |
| Jan 12, 11:25 AM CST | Lakeshore Flood Advisory | LOT | 17 hr |
| Jan 14, 1:45 PM CST | Winter Weather Advisory | LOT | 25 hr |
| Jan 15, 3:03 AM CST | Winter Storm Watch | LOT | 31 hr |
| Jan 16, 3:37 AM CST | Winter Weather Advisory | LOT | 20 hr |
| Jan 16, 8:55 AM CST | Special Weather Statement | LOT | 35 min |
| Jan 21, 3:52 AM CST | Dense Fog Advisory | LOT | 26 hr |
| Jan 24, 4:49 AM CST | Winter Weather Advisory | LOT | 7 hr |
| Feb 3, 3:02 AM CST | Winter Weather Advisory | LOT | 39 hr |
| Feb 4, 2:44 PM CST | Winter Weather Advisory | LOT | 33 hr |
| Feb 7, 3:32 AM CST | Winter Storm Watch | LOT | 23 hr |
| Feb 8, 2:54 AM CST | Winter Storm Warning | LOT | 42 hr |
| Feb 9, 3:08 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Feb 10, 2:37 PM CST | Winter Weather Advisory | LOT | 21 hr |
| Feb 14, 5:14 PM CST | Dense Fog Advisory | LOT | 25 hr |
| Feb 18, 3:36 AM CST | Dense Fog Advisory | LOT | 6 hr |
| Feb 18, 8:00 PM CST | Flood Watch | LOT | 55 hr |
| Feb 19, 10:37 AM CST | River Flood Warning | LOT | 31 days |
| Feb 19, 10:37 AM CST | River Flood Warning | LOT | 30 days |
| Feb 19, 10:44 PM CST | Areal Flood Warning | LOT | 12 hr |
| Feb 20, 10:45 AM CST | Areal Flood Warning | LOT | 24 hr |
| Feb 20, 2:26 PM CST | Special Weather Statement | LOT | 64 min |
| Feb 20, 3:31 PM CST | Winter Weather Advisory | LOT | 15 hr |
| Mar 16, 3:07 AM CDT | Winter Weather Advisory | LOT | 29 hr |
| Mar 17, 3:59 AM CDT | Mesoscale Discussion | SPC | 4 hr |
| Mar 31, 5:38 AM CDT | Wind Advisory | LOT | 11 hr |
| Apr 16, 10:07 AM CDT | River Flood Advisory | LOT | 3 days |
| Apr 16, 10:07 AM CDT | River Flood Advisory | LOT | 4 days |
| Apr 30, 4:35 PM CDT | Red Flag Warning | LOT | 26 hr |
| May 2, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| May 2, 5:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| May 2, 5:46 PM CDT | Severe Thunderstorm Warning | LOT | 44 min |
| May 2, 7:21 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 2, 8:09 PM CDT | Severe Thunderstorm Warning | LOT | 51 min |
| May 2, 8:51 PM CDT | Flash Flood Watch | LOT | 11 hr |
| May 2, 10:51 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 3, 1:57 AM CDT | Mesoscale Discussion | SPC | 93 min |
| May 9, 6:18 PM CDT | Severe Thunderstorm Warning | LOT | 42 min |
| May 9, 6:34 PM CDT | Severe Thunderstorm Warning | LOT | 26 min |
| May 12, 12:34 PM CDT | Flash Flood Watch | LOT | 15 hr |
| May 14, 7:27 AM CDT | Special Weather Statement | LOT | 33 min |
| May 14, 6:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 14, 7:36 PM CDT | Special Weather Statement | LOT | 24 min |
| May 21, 9:52 PM CDT | Dense Fog Advisory | LOT | 12 hr |
| May 22, 11:58 PM CDT | Dense Fog Advisory | LOT | 9 hr |
| May 31, 3:24 PM CDT | Beach Hazards Statement | LOT | 43 hr |
| Jun 5, 2:26 PM CDT | Beach Hazards Statement | LOT | 14 hr |
| Jun 9, 5:23 PM CDT | Dense Fog Advisory | LOT | 10 hr |
| Jun 16, 9:21 AM CDT | Heat Advisory | LOT | 58 hr |
| Jun 19, 2:54 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jun 21, 3:28 AM CDT | Flash Flood Watch | LOT | 34 hr |
| Jun 21, 4:07 PM CDT | River Flood Advisory | LOT | 6 hr |
| Jun 21, 9:34 PM CDT | River Flood Advisory | LOT | 13 hr |
| Jun 21, 9:46 PM CDT | River Flood Warning | LOT | 6 days |
| Jun 27, 3:09 PM CDT | Excessive Heat Watch | LOT | 36 hr |
| Jun 28, 2:44 PM CDT | Excessive Heat Warning | LOT | 3 days |
| Jul 1, 12:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 1, 3:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 1, 6:08 PM CDT | Special Weather Statement | LOT | 37 min |
| Jul 1, 6:51 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Jul 3, 2:38 PM CDT | Heat Advisory | LOT | 49 hr |
| Jul 4, 8:30 PM CDT | Special Weather Statement | LOT | 30 min |
| Jul 4, 9:51 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 5, 3:22 PM CDT | Severe Thunderstorm Warning | LOT | 53 min |
| Jul 5, 3:43 PM CDT | Beach Hazards Statement | LOT | 33 hr |
| Jul 16, 1:26 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 16, 3:18 PM CDT | Beach Hazards Statement | LOT | 39 hr |
| Jul 17, 3:59 AM CDT | Dense Fog Advisory | LOT | 3 hr |
| Jul 20, 4:07 PM CDT | Beach Hazards Statement | LOT | 60 hr |
| Jul 23, 9:17 AM CDT | Beach Hazards Statement | LOT | 13 hr |
| Jul 27, 3:03 AM CDT | Beach Hazards Statement | LOT | 10 hr |
| Aug 6, 5:19 PM CDT | Severe Thunderstorm Warning | LOT | 23 min |
| Aug 6, 5:21 PM CDT | Mesoscale Discussion | SPC | 114 min |
| Aug 19, 4:21 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| Aug 20, 3:37 PM CDT | Beach Hazards Statement | LOT | 51 hr |
| Aug 21, 12:30 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Aug 26, 2:56 PM CDT | Heat Advisory | LOT | 28 hr |
| Aug 28, 4:45 PM CDT | Beach Hazards Statement | LOT | 34 hr |
| Aug 28, 7:37 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 28, 9:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 29, 5:56 AM CDT | Special Weather Statement | LOT | 64 min |
| Sep 3, 3:43 PM CDT | Special Weather Statement | LOT | 47 min |
| Sep 5, 3:23 AM CDT | Beach Hazards Statement | LOT | 5 days |
| Sep 6, 3:51 PM CDT | Beach Hazards Statement | LOT | 11 hr |
| Sep 7, 3:07 AM CDT | Beach Hazards Statement | LOT | 3 days |
| Sep 11, 4:36 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Sep 18, 8:39 AM CDT | Beach Hazards Statement | LOT | 7 hr |
| Sep 20, 3:16 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Sep 20, 3:44 PM CDT | Beach Hazards Statement | LOT | 51 hr |
| Sep 25, 1:36 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Sep 25, 2:49 PM CDT | Beach Hazards Statement | LOT | 25 hr |
| Sep 25, 6:47 PM CDT | Severe Thunderstorm Warning | LOT | 28 min |
| Sep 28, 4:06 AM CDT | Beach Hazards Statement | LOT | 27 hr |
| Oct 11, 3:23 AM CDT | Frost Advisory | LOT | 28 hr |
| Oct 12, 2:37 PM CDT | Frost Advisory | LOT | 18 hr |
| Oct 15, 1:14 PM CDT | Freeze Warning | LOT | 19 hr |
| Oct 20, 9:47 AM CDT | Wind Advisory | LOT | 8 hr |
| Nov 24, 1:44 PM CST | Winter Weather Advisory | LOT | 46 hr |
| Nov 24, 8:05 PM CST | Lakeshore Flood Warning | LOT | 40 hr |
| Nov 30, 8:09 PM CST | Dense Fog Advisory | LOT | 10 hr |
| Dec 14, 4:10 PM CST | Dense Fog Advisory | LOT | 18 hr |
| Dec 27, 12:22 PM CST | Wind Advisory | LOT | 4 hr |
| Dec 29, 8:18 AM CST | Winter Weather Advisory | LOT | 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 | 7 |
| Severe Thunderstorm Watch | 5 |
| Mesoscale Discussion | 14 |
| Special Weather Statement | 8 |
| Flooding | |
| Areal Flood Warning | 2 |
| River Flood Warning | 3 |
| Flash Flood Watch | 3 |
| Flood Watch | 1 |
| Areal Flood Advisory | 4 |
| River Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 13 |
| Heat | |
| Excessive Heat Warning | 1 |
| Excessive Heat Watch | 1 |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| Wind Advisory | 3 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 13 |
| Coast and beach | |
| Lakeshore Flood Warning | 1 |
| Lakeshore Flood Advisory | 1 |
| Beach Hazards Statement | 16 |
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.