Alert archive / Indiana / Porter County
Weather alerts in Porter County, Indiana, 2019
146 weather alerts in 2019, 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 2019. Tap one for its archive.
- Alerts
- 146
- Warnings
- 31
- Watches
- 18
- Advisories
- 54
- Busiest month
- May26 alerts
- Busiest day
- May 27, 20199 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 3 tornado warnings covering Porter County in 2019 had a tornado report inside them.
Porter County, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 11 | 6 | 45% | 6 | 50% | 21 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2019
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 18 | 3 | 83% | 9 | 44% | 17 min |
| NWS Chicago, IL: severe thunderstorm warnings | 127 | 72 | 43% | 281 | 75% | 24 min |
| NWS Chicago, IL: flash flood warnings | 23 | 9 | 61% | 40 | 57% | 110 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 2, 6:04 AM CST | Winter Weather Advisory | LOT | 5 hr |
| Jan 7, 2:10 PM CST | Wind Advisory | LOT | 33 hr |
| Jan 11, 3:15 AM CST | Winter Weather Advisory | LOT | 48 hr |
| Jan 14, 1:45 PM CST | Winter Weather Advisory | LOT | 16 hr |
| Jan 17, 12:13 PM CST | Winter Storm Watch | LOT | 15 hr |
| Jan 18, 3:23 AM CST | Winter Storm Warning | LOT | 35 hr |
| Jan 19, 2:33 PM CST | Winter Weather Advisory | LOT | 33 hr |
| Jan 19, 11:13 PM CST | Mesoscale Discussion | SPC | 4 hr |
| Jan 21, 1:57 PM CST | Winter Weather Advisory | LOT | 46 hr |
| Jan 22, 6:00 PM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 23, 3:00 PM CST | Wind Chill Advisory | LOT | 45 hr |
| Jan 27, 3:01 AM CST | Winter Weather Advisory | LOT | 45 hr |
| Jan 28, 3:01 AM CST | Wind Chill Watch | LOT | 11 hr |
| Jan 28, 1:36 PM CST | Wind Chill Warning | LOT | 70 hr |
| Jan 28, 1:36 PM CST | Wind Chill Advisory | LOT | 28 hr |
| Jan 29, 8:23 PM CST | River Flood Advisory | LOT | 4 days |
| Jan 29, 8:23 PM CST | River Flood Advisory | LOT | 21 days |
| Feb 2, 7:12 PM CST | Dense Fog Advisory | LOT | 6 hr |
| Feb 4, 2:05 PM CST | Winter Weather Advisory | LOT | 34 hr |
| Feb 7, 9:21 AM CST | Dense Fog Advisory | LOT | 5 hr |
| Feb 7, 9:45 AM CST | River Flood Advisory | LOT | 6 days |
| Feb 7, 9:45 AM CST | River Flood Advisory | LOT | 24 hr |
| Feb 7, 12:14 PM CST | Wind Advisory | LOT | 15 hr |
| Feb 10, 2:43 PM CST | Winter Weather Advisory | LOT | 60 hr |
| Feb 11, 9:59 PM CST | Ice Storm Warning | LOT | 11 hr |
| Feb 12, 3:44 AM CST | Wind Advisory | LOT | 23 hr |
| Feb 12, 7:57 AM CST | Dense Fog Advisory | LOT | 2 hr |
| Feb 19, 3:35 AM CST | Winter Weather Advisory | LOT | 35 hr |
| Feb 22, 3:06 PM CST | High Wind Watch | LOT | 23 hr |
| Feb 23, 2:07 PM CST | High Wind Warning | LOT | 31 hr |
| Feb 23, 10:57 PM CST | Special Weather Statement | LOT | 48 min |
| Mar 9, 2:29 PM CST | Wind Advisory | LOT | 16 hr |
| Mar 13, 2:42 PM CDT | Wind Advisory | LOT | 31 hr |
| Mar 14, 12:24 PM CDT | Tornado Watch | SPC | 2 hr |
| Mar 14, 1:48 PM CDT | Severe Thunderstorm Warning | LOT | 42 min |
| Mar 14, 2:12 PM CDT | Severe Thunderstorm Warning | LOT | 24 min |
| Mar 14, 2:19 PM CDT | Tornado Warning | LOT | 14 min |
| Mar 30, 3:20 AM CDT | Lakeshore Flood Advisory | LOT | 31 hr |
| Apr 6, 5:03 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Apr 10, 2:52 PM CDT | Wind Advisory | LOT | 27 hr |
| Apr 12, 3:23 AM CDT | Wind Advisory | LOT | 17 hr |
| Apr 14, 4:09 AM CDT | Lakeshore Flood Advisory | LOT | 24 hr |
| Apr 18, 3:25 AM CDT | Lakeshore Flood Advisory | LOT | 42 hr |
| Apr 30, 10:16 AM CDT | River Flood Warning | LOT | 10 days |
| Apr 30, 10:16 AM CDT | River Flood Warning | LOT | 21 days |
| Apr 30, 2:44 PM CDT | Flash Flood Watch | LOT | 17 hr |
| May 16, 12:51 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 16, 1:49 PM CDT | Special Weather Statement | LOT | 41 min |
| May 16, 11:20 PM CDT | Severe Thunderstorm Warning | LOT | 40 min |
| May 19, 3:01 PM CDT | Special Weather Statement | LOT | 29 min |
| May 22, 10:26 PM CDT | Tornado Watch | SPC | 8 hr |
| May 23, 1:23 AM CDT | Mesoscale Discussion | SPC | 97 min |
| May 23, 1:54 AM CDT | Severe Thunderstorm Warning | LOT | 65 min |
| May 23, 2:15 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| May 24, 11:40 AM CDT | River Flood Advisory | LOT | 5 days |
| May 24, 11:40 AM CDT | River Flood Advisory | LOT | 5 days |
| May 27, 12:50 PM CDT | Mesoscale Discussion | SPC | 85 min |
| May 27, 1:22 PM CDT | Tornado Watch | SPC | 9 hr |
| May 27, 3:34 PM CDT | Severe Thunderstorm Warning | LOT | 56 min |
| May 27, 3:57 PM CDT | Mesoscale Discussion | SPC | 93 min |
| May 27, 4:02 PM CDT | Tornado Warning | LOT | 13 min |
| May 27, 4:17 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| May 27, 4:52 PM CDT | Tornado Warning | LOT | 42 min |
| May 27, 5:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| May 27, 6:10 PM CDT | Severe Thunderstorm Warning | LOT | 21 min |
| May 27, 8:05 PM CDT | River Flood Watch | LOT | 21 days |
| May 27, 8:05 PM CDT | River Flood Watch | LOT | 21 days |
| May 28, 11:16 AM CDT | Mesoscale Discussion | SPC | 119 min |
| May 28, 9:26 PM CDT | River Flood Warning | LOT | 5 days |
| May 28, 9:26 PM CDT | River Flood Warning | LOT | 5 days |
| May 28, 9:28 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| May 31, 4:37 AM CDT | River Flood Advisory | LOT | 58 hr |
| Jun 1, 2:23 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 1, 5:21 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 7, 3:21 AM CDT | Dense Fog Advisory | LOT | 3 hr |
| Jun 9, 9:51 AM CDT | Beach Hazards Statement | LOT | 33 hr |
| Jun 12, 3:40 AM CDT | Beach Hazards Statement | LOT | 42 hr |
| Jun 12, 3:43 PM CDT | Lakeshore Flood Advisory | LOT | 27 hr |
| Jun 15, 8:00 PM CDT | Dense Fog Advisory | LOT | 14 hr |
| Jun 19, 2:49 PM CDT | Flash Flood Watch | LOT | 18 hr |
| Jun 20, 3:16 AM CDT | Areal Flood Advisory | LOT | 6 hr |
| Jun 20, 4:16 AM CDT | Beach Hazards Statement | LOT | 14 hr |
| Jun 24, 5:33 PM CDT | Special Weather Statement | LOT | 27 min |
| Jun 24, 5:55 PM CDT | Special Weather Statement | LOT | 20 min |
| Jun 25, 1:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 5:59 PM CDT | Special Weather Statement | LOT | 16 min |
| Jun 25, 6:36 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 26, 9:43 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jun 26, 10:00 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jun 26, 10:39 PM CDT | Flash Flood Warning | LOT | 6 hr |
| Jun 27, 4:43 AM CDT | Areal Flood Warning | LOT | 12 hr |
| Jun 27, 6:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 30, 11:43 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 2:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Jul 6, 3:16 AM CDT | Beach Hazards Statement | LOT | 48 hr |
| Jul 6, 3:16 AM CDT | Lakeshore Flood Advisory | LOT | 38 hr |
| Jul 10, 2:42 PM CDT | Beach Hazards Statement | LOT | 36 hr |
| Jul 16, 2:30 PM CDT | Excessive Heat Watch | LOT | 24 hr |
| Jul 17, 2:14 PM CDT | Excessive Heat Warning | LOT | 3 days |
| Jul 20, 5:12 PM CDT | Mesoscale Discussion | SPC | 93 min |
| Jul 21, 4:17 AM CDT | Beach Hazards Statement | LOT | 49 hr |
| Jul 21, 2:12 PM CDT | Severe Thunderstorm Warning | LOT | 63 min |
| Jul 22, 2:56 AM CDT | Lakeshore Flood Advisory | LOT | 24 hr |
| Jul 30, 7:14 PM CDT | Beach Hazards Statement | LOT | 24 hr |
| Aug 16, 4:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 17, 2:45 AM CDT | Special Weather Statement | LOT | 45 min |
| Aug 17, 2:54 AM CDT | Severe Thunderstorm Warning | LOT | 66 min |
| Aug 17, 8:00 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 4:58 AM CDT | Severe Thunderstorm Warning | LOT | 47 min |
| Aug 18, 5:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Aug 18, 6:06 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 18, 7:20 AM CDT | Severe Thunderstorm Warning | LOT | 40 min |
| Aug 18, 7:40 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 18, 8:00 AM CDT | Special Weather Statement | LOT | 30 min |
| Aug 20, 9:04 AM CDT | Mesoscale Discussion | SPC | 86 min |
| Aug 20, 12:12 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 3:57 AM CDT | Beach Hazards Statement | LOT | 59 hr |
| Aug 27, 2:25 PM CDT | Beach Hazards Statement | LOT | 30 hr |
| Sep 2, 4:47 AM CDT | Dense Fog Advisory | LOT | 3 hr |
| Sep 3, 2:34 PM CDT | Beach Hazards Statement | LOT | 31 hr |
| Sep 3, 3:54 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 3, 9:03 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 6, 3:29 AM CDT | Beach Hazards Statement | LOT | 31 hr |
| Sep 22, 2:41 PM CDT | Beach Hazards Statement | LOT | 25 hr |
| Sep 26, 2:54 AM CDT | Beach Hazards Statement | LOT | 12 hr |
| Sep 27, 1:43 PM CDT | Flash Flood Watch | LOT | 16 hr |
| Sep 27, 7:10 PM CDT | Severe Thunderstorm Warning | LOT | 52 min |
| Sep 27, 7:48 PM CDT | Flash Flood Warning | LOT | 6 hr |
| Sep 28, 1:42 AM CDT | Areal Flood Warning | LOT | 6 hr |
| Sep 28, 4:10 AM CDT | Beach Hazards Statement | LOT | 39 hr |
| Oct 13, 2:23 PM CDT | Frost Advisory | LOT | 18 hr |
| Oct 15, 2:11 PM CDT | Lakeshore Flood Advisory | LOT | 31 hr |
| Oct 17, 7:18 PM CDT | Frost Advisory | LOT | 13 hr |
| Oct 30, 3:21 AM CDT | Lakeshore Flood Advisory | LOT | 40 hr |
| Oct 31, 3:48 AM CDT | Wind Advisory | LOT | 15 hr |
| Oct 31, 9:09 AM CDT | Lakeshore Flood Warning | LOT | 16 hr |
| Nov 6, 4:00 AM CST | Lakeshore Flood Advisory | LOT | 48 hr |
| Nov 10, 3:40 AM CST | Lakeshore Flood Watch | LOT | 10 hr |
| Nov 10, 12:55 PM CST | Winter Weather Advisory | LOT | 32 hr |
| Nov 10, 1:51 PM CST | Lakeshore Flood Warning | LOT | 50 hr |
| Nov 25, 2:44 PM CST | High Wind Watch | LOT | 23 hr |
| Nov 26, 1:26 PM CST | High Wind Warning | LOT | 29 hr |
| Nov 26, 2:22 PM CST | Lakeshore Flood Advisory | LOT | 40 hr |
| Dec 1, 3:13 AM CST | Lakeshore Flood Warning | LOT | 39 hr |
| Dec 17, 2:18 PM CST | Lakeshore Flood Advisory | LOT | 25 hr |
| Dec 24, 1:36 AM CST | Freezing Fog Advisory | LOT | 8 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.