Alert archive / Indiana / Lake County
Weather alerts in Lake County, Indiana, 2017
148 weather alerts in 2017, 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 2017. Tap one for its archive.
- Alerts
- 148
- Warnings
- 32
- Watches
- 16
- Advisories
- 43
- Busiest month
- July26 alerts
- Busiest day
- March 1, 20179 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, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 5 | 50% | 10 | 70% | 6 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2017
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 14 | 6 | 57% | 17 | 76% | 17 min |
| NWS Chicago, IL: severe thunderstorm warnings | 158 | 76 | 52% | 310 | 72% | 21 min |
| NWS Chicago, IL: flash flood warnings | 12 | 6 | 50% | 27 | 81% | 129 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, 6:30 PM CST | Dense Fog Advisory | LOT | 17 hr |
| Jan 9, 7:12 AM CST | River Flood Warning | LOT | 3 days |
| Jan 10, 3:38 AM CST | Wind Advisory | LOT | 17 hr |
| Jan 10, 11:55 AM CST | High Wind Warning | LOT | 9 hr |
| Jan 11, 10:02 AM CST | Freezing Rain Advisory | LOT | 23 hr |
| Jan 11, 1:15 PM CST | Dense Fog Advisory | LOT | 7 hr |
| Jan 12, 3:05 AM CST | Mesoscale Discussion | SPC | 6 hr |
| Jan 13, 10:19 AM CST | River Flood Warning | LOT | 17 days |
| Jan 16, 12:13 PM CST | Dense Fog Advisory | LOT | 17 hr |
| Jan 20, 4:29 PM CST | Dense Fog Advisory | LOT | 19 hr |
| Jan 21, 9:08 PM CST | Dense Fog Advisory | LOT | 15 hr |
| Jan 22, 2:41 PM CST | Dense Fog Advisory | LOT | 15 hr |
| Feb 6, 7:07 PM CST | Dense Fog Advisory | LOT | 19 hr |
| Feb 9, 10:43 AM CST | River Flood Warning | LOT | 4 days |
| Feb 12, 9:45 AM CST | River Flood Advisory | LOT | 29 hr |
| Feb 20, 3:41 AM CST | Dense Fog Advisory | LOT | 6 hr |
| Feb 21, 11:34 PM CST | Dense Fog Advisory | LOT | 11 hr |
| Feb 23, 7:02 AM CST | Dense Fog Advisory | LOT | 3 hr |
| Feb 28, 2:03 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 28, 2:57 PM CST | Tornado Watch | SPC | 7 hr |
| Feb 28, 5:24 PM CST | Mesoscale Discussion | SPC | 96 min |
| Feb 28, 6:31 PM CST | Severe Thunderstorm Warning | LOT | 59 min |
| Feb 28, 8:51 PM CST | Areal Flood Advisory | LOT | 6 hr |
| Feb 28, 8:57 PM CST | Severe Thunderstorm Warning | LOT | 37 min |
| Feb 28, 9:09 PM CST | Areal Flood Warning | LOT | 6 hr |
| Feb 28, 9:51 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 28, 11:20 PM CST | Special Weather Statement | LOT | 25 min |
| Feb 28, 11:25 PM CST | River Flood Warning | LOT | 29 hr |
| Feb 28, 11:32 PM CST | Severe Thunderstorm Warning | LOT | 28 min |
| Mar 1, 12:21 AM CST | River Flood Warning | LOT | 32 hr |
| Mar 7, 1:49 AM CST | Special Weather Statement | LOT | 41 min |
| Mar 7, 1:53 AM CST | Mesoscale Discussion | SPC | 97 min |
| Mar 7, 7:38 PM CST | Wind Advisory | LOT | 22 hr |
| Mar 8, 9:35 AM CST | Red Flag Warning | LOT | 7 hr |
| Mar 8, 11:23 AM CST | High Wind Warning | LOT | 6 hr |
| Mar 11, 3:43 PM CST | Winter Weather Advisory | LOT | 44 hr |
| Mar 13, 10:22 AM CDT | Lake Effect Snow Warning | LOT | 48 hr |
| Mar 13, 2:52 PM CDT | Lake Effect Snow Advisory | LOT | 23 hr |
| Mar 27, 9:49 AM CDT | River Flood Watch | LOT | 5 days |
| Mar 28, 11:02 AM CDT | River Flood Warning | LOT | 22 days |
| Mar 28, 7:17 PM CDT | Dense Fog Advisory | LOT | 14 hr |
| Mar 30, 5:49 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Mar 30, 7:58 AM CDT | River Flood Warning | LOT | 24 hr |
| Mar 31, 9:22 AM CDT | River Flood Advisory | LOT | 36 hr |
| Apr 4, 3:58 AM CDT | Lakeshore Flood Watch | LOT | 24 hr |
| Apr 4, 3:21 PM CDT | High Wind Watch | LOT | 24 hr |
| Apr 5, 4:07 AM CDT | Lakeshore Flood Warning | LOT | 45 hr |
| Apr 5, 3:25 PM CDT | High Wind Warning | LOT | 26 hr |
| Apr 5, 3:25 PM CDT | Wind Advisory | LOT | 23 hr |
| Apr 6, 11:05 AM CDT | River Flood Advisory | LOT | 36 hr |
| Apr 10, 11:57 AM CDT | Mesoscale Discussion | SPC | 3 hr |
| Apr 10, 1:10 PM CDT | Severe Thunderstorm Warning | LOT | 29 min |
| Apr 10, 1:48 PM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 10, 3:25 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 10, 6:22 PM CDT | Mesoscale Discussion | SPC | 53 min |
| Apr 10, 8:27 PM CDT | Severe Thunderstorm Warning | LOT | 37 min |
| Apr 10, 8:58 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Apr 11, 3:42 AM CDT | Dense Fog Advisory | LOT | 3 hr |
| Apr 28, 10:47 AM CDT | River Flood Warning | LOT | 5 days |
| Apr 28, 12:09 PM CDT | River Flood Watch | LOT | 47 hr |
| Apr 28, 12:09 PM CDT | River Flood Watch | LOT | 5 days |
| Apr 28, 3:05 PM CDT | Flash Flood Watch | LOT | 61 hr |
| Apr 29, 7:04 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Apr 30, 10:17 AM CDT | River Flood Warning | LOT | 55 hr |
| Apr 30, 11:22 AM CDT | River Flood Warning | LOT | 16 days |
| May 6, 2:39 PM CDT | Frost Advisory | LOT | 17 hr |
| May 7, 3:04 AM CDT | Frost Advisory | LOT | 27 hr |
| May 17, 3:30 AM CDT | Wind Advisory | LOT | 19 hr |
| May 21, 10:41 AM CDT | River Flood Warning | LOT | 10 days |
| May 24, 10:30 AM CDT | Beach Hazards Statement | LOT | 36 hr |
| May 26, 6:45 PM CDT | Special Weather Statement | LOT | 45 min |
| Jun 4, 3:42 PM CDT | Beach Hazards Statement | LOT | 60 hr |
| Jun 4, 4:32 PM CDT | Special Weather Statement | LOT | 43 min |
| Jun 9, 9:33 AM CDT | Beach Hazards Statement | LOT | 7 hr |
| Jun 13, 2:25 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 14, 12:40 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 14, 3:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 14, 4:59 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jun 17, 2:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 8:17 PM CDT | Mesoscale Discussion | SPC | 58 min |
| Jun 19, 12:44 PM CDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 20, 2:05 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 20, 2:47 PM CDT | Special Weather Statement | LOT | 13 min |
| Jun 20, 3:02 PM CDT | Severe Thunderstorm Warning | LOT | 28 min |
| Jun 20, 5:41 PM CDT | Beach Hazards Statement | LOT | 4 hr |
| Jun 23, 6:08 AM CDT | Severe Thunderstorm Warning | LOT | 23 min |
| Jun 25, 4:15 PM CDT | Beach Hazards Statement | LOT | 36 hr |
| Jul 2, 6:36 PM CDT | Special Weather Statement | LOT | 24 min |
| Jul 2, 6:56 PM CDT | Special Weather Statement | LOT | 34 min |
| Jul 7, 11:49 AM CDT | Severe Thunderstorm Warning | LOT | 41 min |
| Jul 7, 1:13 PM CDT | Severe Thunderstorm Warning | LOT | 47 min |
| Jul 8, 6:58 AM CDT | Beach Hazards Statement | LOT | 8 hr |
| Jul 10, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 10, 6:18 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jul 12, 8:33 AM CDT | Mesoscale Discussion | SPC | 117 min |
| Jul 12, 2:32 PM CDT | Flash Flood Watch | LOT | 12 hr |
| Jul 12, 11:32 PM CDT | Areal Flood Advisory | LOT | 4 hr |
| Jul 14, 10:32 AM CDT | Beach Hazards Statement | LOT | 10 hr |
| Jul 15, 3:36 PM CDT | Beach Hazards Statement | LOT | 39 hr |
| Jul 16, 3:31 AM CDT | Special Weather Statement | LOT | 44 min |
| Jul 19, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 19, 9:55 PM CDT | Special Weather Statement | LOT | 35 min |
| Jul 20, 7:14 AM CDT | Areal Flood Advisory | LOT | 2 hr |
| Jul 21, 4:52 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 21, 6:28 PM CDT | Mesoscale Discussion | SPC | 92 min |
| Jul 21, 8:35 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 21, 11:11 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 21, 11:23 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jul 22, 3:38 AM CDT | River Flood Watch | LOT | 24 hr |
| Jul 22, 9:46 PM CDT | River Flood Warning | LOT | 5 days |
| Jul 23, 1:03 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 2:55 PM CDT | Beach Hazards Statement | LOT | 31 hr |
| Jul 27, 3:29 AM CDT | Beach Hazards Statement | LOT | 66 hr |
| Aug 3, 1:31 PM CDT | Special Weather Statement | LOT | 59 min |
| Aug 3, 3:47 PM CDT | Special Weather Statement | LOT | 28 min |
| Aug 3, 4:04 PM CDT | Beach Hazards Statement | LOT | 37 hr |
| Aug 3, 9:05 PM CDT | Special Weather Statement | LOT | 25 min |
| Aug 6, 3:52 PM CDT | Beach Hazards Statement | LOT | 36 hr |
| Aug 10, 5:31 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Aug 11, 10:21 AM CDT | Beach Hazards Statement | LOT | 36 hr |
| Aug 21, 3:22 PM CDT | Beach Hazards Statement | LOT | 53 hr |
| Aug 24, 3:25 PM CDT | Beach Hazards Statement | LOT | 6 hr |
| Aug 30, 3:47 AM CDT | Beach Hazards Statement | LOT | 66 hr |
| Aug 30, 4:30 AM CDT | Dense Fog Advisory | LOT | 5 hr |
| Sep 3, 3:25 PM CDT | Beach Hazards Statement | LOT | 4 days |
| Sep 14, 1:14 AM CDT | Dense Fog Advisory | LOT | 9 hr |
| Sep 20, 12:31 AM CDT | Dense Fog Advisory | LOT | 8 hr |
| Sep 26, 3:56 PM CDT | Beach Hazards Statement | LOT | 36 hr |
| Sep 28, 4:11 AM CDT | Beach Hazards Statement | LOT | 6 hr |
| Sep 28, 3:25 PM CDT | Beach Hazards Statement | LOT | 43 hr |
| Oct 14, 9:16 AM CDT | River Flood Advisory | LOT | 36 hr |
| Oct 14, 6:01 PM CDT | Mesoscale Discussion | SPC | 89 min |
| Oct 14, 8:55 PM CDT | Severe Thunderstorm Warning | LOT | 27 min |
| Oct 14, 9:04 PM CDT | Mesoscale Discussion | SPC | 86 min |
| Oct 14, 11:36 PM CDT | Special Weather Statement | LOT | 39 min |
| Oct 25, 3:00 AM CDT | Frost Advisory | LOT | 29 hr |
| Oct 27, 3:29 PM CDT | Freeze Warning | LOT | 42 hr |
| Nov 4, 11:33 PM CDT | Dense Fog Advisory | LOT | 10 hr |
| Nov 18, 3:47 AM CST | Lakeshore Flood Advisory | LOT | 22 hr |
| Nov 18, 9:51 AM CST | River Flood Watch | LOT | 5 days |
| Nov 19, 9:17 AM CST | River Flood Warning | LOT | 7 days |
| Dec 4, 3:10 AM CST | Wind Advisory | LOT | 39 hr |
| Dec 9, 3:51 AM CST | Lakeshore Flood Advisory | LOT | 17 hr |
| Dec 13, 8:44 PM CST | Winter Weather Advisory | LOT | 14 hr |
| Dec 23, 3:21 AM CST | Winter Weather Advisory | LOT | 39 hr |
| Dec 23, 2:22 PM CST | Winter Storm Warning | LOT | 31 hr |
| Dec 26, 12:54 PM CST | Wind Chill Advisory | LOT | 22 hr |
| Dec 28, 8:33 PM CST | Winter Weather Advisory | LOT | 24 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 archive20162018
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.