Alert archive / Indiana / Lake County
Weather alerts in Lake County, Indiana, 2018
134 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lake County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 134
- Warnings
- 27
- Watches
- 15
- Advisories
- 48
- Busiest month
- May25 alerts
- Busiest day
- May 3, 20188 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lake County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 7 | 4 | 43% | 7 | 43% | 9 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 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, 8:49 AM CST | River Flood Watch | LOT | 24 hr |
| Jan 12, 11:25 AM CST | Lakeshore Flood Advisory | LOT | 17 hr |
| Jan 12, 9:45 PM CST | River Flood Warning | LOT | 24 hr |
| Jan 14, 1:45 PM CST | Winter Weather Advisory | LOT | 25 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 17, 10:22 AM CST | River Flood Advisory | LOT | 50 hr |
| Jan 19, 1:20 PM CST | River Flood Warning | LOT | 71 hr |
| Jan 21, 3:52 AM CST | Dense Fog Advisory | LOT | 26 hr |
| Jan 22, 4:14 AM CST | Areal Flood Advisory | LOT | 5 hr |
| Jan 24, 4:49 AM CST | Winter Weather Advisory | LOT | 7 hr |
| Jan 24, 9:33 AM CST | River Flood Advisory | LOT | 5 days |
| 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 17, 10:42 AM CST | River Flood Watch | LOT | 24 hr |
| Feb 18, 3:36 AM CST | Dense Fog Advisory | LOT | 6 hr |
| Feb 18, 10:43 AM CST | River Flood Warning | LOT | 50 days |
| Feb 18, 10:55 AM CST | River Flood Warning | LOT | 5 days |
| Feb 18, 8:00 PM CST | Flood Watch | LOT | 55 hr |
| Feb 19, 10:44 PM CST | Areal Flood Warning | LOT | 12 hr |
| Feb 20, 3:00 AM CST | River Flood Warning | LOT | 31 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 14, 9:51 AM CDT | River Flood Warning | LOT | 10 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, 5:42 PM CDT | Special Weather Statement | LOT | 18 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, 10:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| May 2, 10:51 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 3, 1:57 AM CDT | Mesoscale Discussion | SPC | 93 min |
| May 3, 8:48 AM CDT | River Flood Warning | LOT | 6 days |
| May 3, 10:16 AM CDT | River Flood Watch | LOT | 24 hr |
| May 9, 6:02 PM CDT | Severe Thunderstorm Warning | LOT | 28 min |
| May 9, 6:18 PM CDT | Severe Thunderstorm Warning | LOT | 42 min |
| May 12, 9:17 AM CDT | River Flood Advisory | LOT | 8 days |
| May 12, 12:34 PM CDT | Flash Flood Watch | LOT | 15 hr |
| May 12, 10:11 PM CDT | River Flood Advisory | LOT | 40 hr |
| May 13, 1:05 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| May 13, 1:27 AM CDT | Special Weather Statement | LOT | 33 min |
| May 14, 6:36 PM CDT | Mesoscale Discussion | SPC | 84 min |
| May 16, 9:35 AM CDT | River Flood Warning | LOT | 6 days |
| 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, 2:48 PM CDT | Special Weather Statement | LOT | 27 min |
| 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, 3:33 AM CDT | Beach Hazards Statement | LOT | 48 hr |
| Jun 21, 1:44 PM CDT | River Flood Warning | LOT | 21 hr |
| Jun 21, 3:51 PM CDT | River Flood Warning | LOT | 24 hr |
| 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, 4:35 PM CDT | Special Weather Statement | LOT | 55 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, 9:51 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 5, 2:31 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 5, 2:41 PM CDT | Special Weather Statement | LOT | 34 min |
| Jul 5, 3:10 PM CDT | Severe Thunderstorm Warning | LOT | 36 min |
| 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 5, 4:18 PM CDT | Areal Flood Warning | LOT | 5 hr |
| Jul 5, 4:26 PM CDT | River Flood Warning | LOT | 12 hr |
| Jul 16, 12:50 PM CDT | Special Weather Statement | LOT | 25 min |
| Jul 16, 1:26 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 16, 2:06 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 16, 3:18 PM CDT | Beach Hazards Statement | LOT | 39 hr |
| Jul 16, 3:38 PM CDT | Special Weather Statement | LOT | 37 min |
| Jul 20, 4:07 PM CDT | Beach Hazards Statement | LOT | 60 hr |
| Jul 23, 9:17 AM CDT | Beach Hazards Statement | LOT | 13 hr |
| Aug 1, 4:30 PM CDT | Special Weather Statement | LOT | 30 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 25, 5:15 PM CDT | Mesoscale Discussion | SPC | 2 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, 7:05 PM CDT | Mesoscale Discussion | SPC | 55 min |
| Aug 28, 7:37 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Aug 28, 8:04 PM CDT | Flash Flood Watch | LOT | 8 hr |
| Aug 28, 9:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Aug 28, 10:06 PM CDT | Special Weather Statement | LOT | 54 min |
| Aug 29, 5:56 AM CDT | Special Weather Statement | LOT | 64 min |
| Sep 3, 4:50 PM CDT | Areal Flood Advisory | LOT | 115 min |
| Sep 3, 5:17 PM CDT | Special Weather Statement | LOT | 43 min |
| Sep 3, 6:43 PM CDT | Areal Flood Advisory | LOT | 2 hr |
| Sep 5, 3:23 AM CDT | Beach Hazards Statement | LOT | 5 days |
| Sep 7, 3:07 AM CDT | Beach Hazards Statement | LOT | 3 days |
| Sep 8, 3:32 AM CDT | Lakeshore Flood Advisory | LOT | 48 hr |
| 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, 5:59 PM CDT | Special Weather Statement | LOT | 61 min |
| Sep 25, 6:29 PM CDT | Severe Thunderstorm Warning | LOT | 31 min |
| 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, 10:37 AM CST | River Flood Warning | LOT | 7 days |
| Dec 14, 4:10 PM CST | Dense Fog Advisory | LOT | 18 hr |
| Dec 16, 12:54 AM CST | Dense Fog Advisory | LOT | 9 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 | 17 |
| Special Weather Statement | 14 |
| Flooding | |
| Areal Flood Warning | 3 |
| River Flood Warning | 12 |
| Flash Flood Watch | 4 |
| Flood Watch | 1 |
| River Flood Watch | 3 |
| Areal Flood Advisory | 10 |
| River Flood Advisory | 4 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 12 |
| 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 | 12 |
| Coast and beach | |
| Lakeshore Flood Warning | 1 |
| Lakeshore Flood Advisory | 2 |
| Beach Hazards Statement | 13 |
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.