Alert archive / Indiana / Porter County
Weather alerts in Porter County, Indiana, 2010
150 weather alerts in 2010, 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 2010. Tap one for its archive.
- Alerts
- 150
- Warnings
- 31
- Watches
- 32
- Advisories
- 46
- Busiest month
- June42 alerts
- Busiest day
- June 23, 20108 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
1 of 3 tornado warnings covering Porter County in 2010 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 18 minutes after it went out.
Porter County, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 1 | 67% | 1 | 100% | 18 min |
| Severe thunderstorm warnings | 11 | 5 | 55% | 10 | 50% | 36 min |
| Flash flood warnings | 4 | 1 | 75% | 2 | 50% | 161 min |
Each office's whole area, 2010
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 32 | 10 | 69% | 35 | 63% | 26 min |
| NWS Chicago, IL: severe thunderstorm warnings | 122 | 70 | 43% | 394 | 72% | 31 min |
| NWS Chicago, IL: flash flood warnings | 31 | 14 | 55% | 51 | 84% | 102 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 1, 3:17 PM CST | Lake Effect Snow Advisory | LOT | 60 hr |
| Jan 5, 1:34 PM CST | Winter Storm Watch | LOT | 23 hr |
| Jan 6, 12:51 PM CST | Winter Storm Warning | LOT | 3 days |
| Jan 16, 8:16 PM CST | Freezing Fog Advisory | LOT | 15 hr |
| Jan 17, 3:21 PM CST | Freezing Fog Advisory | LOT | 21 hr |
| Jan 20, 4:00 AM CST | Freezing Rain Advisory | LOT | 26 hr |
| Feb 7, 1:17 PM CST | Winter Storm Watch | LOT | 15 hr |
| Feb 8, 3:53 AM CST | Winter Storm Warning | LOT | 53 hr |
| Feb 9, 3:17 AM CST | Blizzard Watch | LOT | 12 hr |
| Feb 10, 4:14 AM CST | Winter Weather Advisory | LOT | 10 hr |
| Feb 21, 12:16 PM CST | Winter Weather Advisory | LOT | 20 hr |
| Feb 23, 4:03 PM CST | Lake Effect Snow Watch | LOT | 12 hr |
| Feb 24, 4:25 AM CST | Lake Effect Snow Warning | LOT | 11 hr |
| Feb 24, 4:25 AM CST | Lake Effect Snow Advisory | LOT | 30 hr |
| Mar 7, 9:37 PM CST | Dense Fog Advisory | LOT | 12 hr |
| Mar 8, 6:05 PM CST | Dense Fog Advisory | LOT | 18 hr |
| Apr 2, 4:46 AM CDT | Fire Weather Watch | LOT | 7 hr |
| Apr 2, 3:06 PM CDT | Red Flag Warning | LOT | 5 hr |
| Apr 5, 3:53 AM CDT | Dense Fog Advisory | LOT | 4 hr |
| Apr 5, 11:07 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Apr 6, 9:04 AM CDT | Special Weather Statement | LOT | 26 min |
| Apr 15, 10:03 AM CDT | Red Flag Warning | LOT | 10 hr |
| Apr 17, 2:24 AM CDT | Frost Advisory | LOT | 27 hr |
| Apr 27, 11:16 AM CDT | Frost Advisory | LOT | 21 hr |
| Apr 29, 3:26 AM CDT | Wind Advisory | LOT | 16 hr |
| May 8, 4:10 AM CDT | Frost Advisory | LOT | 28 hr |
| May 12, 3:13 PM CDT | Flood Watch | LOT | 24 hr |
| May 13, 3:44 AM CDT | Flash Flood Warning | LOT | 5 hr |
| May 13, 6:53 AM CDT | Severe Thunderstorm Watch | SPC | 2 hr |
| May 22, 1:06 AM CDT | Dense Fog Advisory | LOT | 9 hr |
| Jun 1, 12:32 AM CDT | Dense Fog Advisory | LOT | 8 hr |
| Jun 1, 3:46 PM CDT | Flash Flood Watch | LOT | 23 hr |
| Jun 2, 3:27 AM CDT | Severe Thunderstorm Warning | LOT | 61 min |
| Jun 2, 4:33 AM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 3, 3:35 AM CDT | Rip Current Statement | LOT | 16 hr |
| Jun 4, 4:36 PM CDT | Flash Flood Watch | LOT | 32 hr |
| Jun 4, 4:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Jun 4, 5:29 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 5, 4:54 PM CDT | Rip Current Statement | LOT | 26 hr |
| Jun 5, 7:37 PM CDT | Tornado Watch | SPC | 6 hr |
| Jun 5, 10:29 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jun 5, 10:49 PM CDT | Tornado Warning | LOT | 26 min |
| Jun 5, 11:17 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 11, 12:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 12:50 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 12, 4:31 PM CDT | Severe Thunderstorm Warning | LOT | 57 min |
| Jun 15, 5:54 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Jun 15, 6:44 PM CDT | Flash Flood Warning | LOT | 4 hr |
| Jun 18, 12:29 PM CDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 18, 4:12 PM CDT | Severe Thunderstorm Warning | LOT | 63 min |
| Jun 18, 5:00 PM CDT | Severe Thunderstorm Warning | LOT | 30 min |
| Jun 18, 5:04 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Jun 18, 5:06 PM CDT | Mesoscale Discussion | SPC | 54 min |
| Jun 18, 5:47 PM CDT | Flash Flood Watch | LOT | 9 hr |
| Jun 18, 8:05 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 18, 9:52 PM CDT | Special Weather Statement | LOT | 53 min |
| Jun 18, 11:01 PM CDT | Areal Flood Advisory | LOT | 2 hr |
| Jun 21, 9:51 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 22, 9:01 PM CDT | Flash Flood Watch | LOT | 25 hr |
| Jun 23, 3:38 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 23, 8:31 AM CDT | Mesoscale Discussion | SPC | 59 min |
| Jun 23, 8:58 AM CDT | Severe Thunderstorm Warning | LOT | 32 min |
| Jun 23, 2:10 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 23, 5:56 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jun 23, 6:23 PM CDT | Severe Thunderstorm Warning | LOT | 67 min |
| Jun 23, 6:48 PM CDT | Tornado Warning | LOT | 22 min |
| Jun 23, 7:16 PM CDT | Severe Thunderstorm Warning | LOT | 89 min |
| Jun 23, 7:23 PM CDT | Flash Flood Warning | LOT | 2 hr |
| Jun 26, 5:00 AM CDT | Special Weather Statement | LOT | 30 min |
| Jun 27, 9:49 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jun 27, 10:02 AM CDT | Mesoscale Discussion | SPC | 118 min |
| Jun 27, 10:32 AM CDT | Special Weather Statement | LOT | 13 min |
| Jul 10, 3:36 PM CDT | Special Weather Statement | LOT | 39 min |
| Jul 10, 3:47 PM CDT | Severe Thunderstorm Warning | LOT | 28 min |
| Jul 12, 1:25 AM CDT | Dense Fog Advisory | LOT | 6 hr |
| Jul 15, 3:30 AM CDT | Heat Advisory | LOT | 16 hr |
| Jul 15, 11:57 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 15, 2:47 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 18, 11:52 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 18, 12:25 PM CDT | Severe Thunderstorm Warning | LOT | 50 min |
| Jul 18, 12:47 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 18, 1:03 PM CDT | Severe Thunderstorm Warning | LOT | 42 min |
| Jul 22, 2:47 PM CDT | Heat Advisory | LOT | 28 hr |
| Jul 22, 11:00 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 23, 2:30 PM CDT | Mesoscale Discussion | SPC | 90 min |
| Jul 23, 3:01 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 23, 6:04 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Jul 23, 6:53 PM CDT | Severe Thunderstorm Warning | LOT | 51 min |
| Jul 24, 1:31 AM CDT | Flash Flood Warning | LOT | 6 hr |
| Jul 24, 1:53 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 3:37 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Jul 24, 11:04 PM CDT | Special Weather Statement | LOT | 56 min |
| Jul 24, 11:12 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Jul 25, 3:32 AM CDT | Rip Current Statement | LOT | 18 hr |
| Jul 28, 11:44 AM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 28, 1:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 28, 2:23 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 28, 4:13 PM CDT | Areal Flood Advisory | LOT | 2 hr |
| Jul 31, 10:49 PM CDT | Dense Fog Advisory | LOT | 12 hr |
| Aug 3, 4:55 AM CDT | Mesoscale Discussion | SPC | 95 min |
| Aug 3, 6:25 AM CDT | Areal Flood Advisory | LOT | 6 hr |
| Aug 3, 11:16 AM CDT | Areal Flood Warning | LOT | 4 hr |
| Aug 3, 3:39 PM CDT | Flash Flood Watch | LOT | 23 hr |
| Aug 4, 6:45 AM CDT | Mesoscale Discussion | SPC | 60 min |
| Aug 4, 7:09 AM CDT | Special Weather Statement | LOT | 36 min |
| Aug 4, 7:34 AM CDT | Areal Flood Advisory | LOT | 3 hr |
| Aug 6, 2:35 PM CDT | Rip Current Statement | LOT | 7 hr |
| Aug 11, 3:37 PM CDT | Heat Advisory | LOT | 51 hr |
| Aug 16, 5:20 PM CDT | Rip Current Statement | LOT | 5 hr |
| Aug 21, 10:38 AM CDT | Rip Current Statement | LOT | 47 hr |
| Aug 24, 3:37 AM CDT | Rip Current Statement | LOT | 54 hr |
| Sep 2, 3:34 PM CDT | Rip Current Statement | LOT | 51 hr |
| Sep 5, 3:17 PM CDT | Rip Current Statement | LOT | 6 hr |
| Sep 6, 3:56 PM CDT | Wind Advisory | LOT | 27 hr |
| Sep 6, 10:17 PM CDT | Rip Current Statement | LOT | 38 hr |
| Sep 15, 10:02 AM CDT | Rip Current Statement | LOT | 45 hr |
| Sep 18, 5:24 PM CDT | Rip Current Statement | LOT | 8 hr |
| Sep 24, 3:14 AM CDT | Rip Current Statement | LOT | 64 hr |
| Sep 29, 5:16 PM CDT | Rip Current Statement | LOT | 38 hr |
| Oct 3, 1:36 PM CDT | Frost Advisory | LOT | 17 hr |
| Oct 4, 3:30 PM CDT | Frost Advisory | LOT | 16 hr |
| Oct 12, 2:30 AM CDT | Dense Fog Advisory | LOT | 7 hr |
| Oct 20, 1:33 PM CDT | Red Flag Warning | LOT | 5 hr |
| Oct 21, 3:43 PM CDT | Frost Advisory | LOT | 16 hr |
| Oct 24, 3:39 PM CDT | High Wind Watch | LOT | 24 hr |
| Oct 25, 4:38 AM CDT | High Wind Warning | LOT | 39 hr |
| Oct 25, 3:36 PM CDT | Wind Advisory | LOT | 13 hr |
| Oct 26, 3:28 AM CDT | Tornado Watch | SPC | 8 hr |
| Oct 26, 6:00 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 26, 8:15 AM CDT | Tornado Warning | LOT | 45 min |
| Oct 26, 7:13 PM CDT | Wind Advisory | LOT | 24 hr |
| Oct 27, 2:03 PM CDT | Red Flag Warning | LOT | 5 hr |
| Oct 29, 9:41 PM CDT | Fire Weather Watch | LOT | 12 hr |
| Nov 22, 11:23 AM CST | Tornado Watch | SPC | 7 hr |
| Nov 22, 5:13 PM CST | Tornado Watch | SPC | 4 hr |
| Nov 24, 9:51 AM CST | Winter Weather Advisory | LOT | 5 hr |
| Nov 24, 11:35 AM CST | Mesoscale Discussion | SPC | 5 hr |
| Nov 25, 12:07 AM CST | Dense Fog Advisory | LOT | 9 hr |
| Dec 3, 2:28 AM CST | Winter Weather Advisory | LOT | 50 hr |
| Dec 4, 9:54 AM CST | Lake Effect Snow Warning | LOT | 22 hr |
| Dec 7, 8:46 AM CST | Lake Effect Snow Advisory | LOT | 7 hr |
| Dec 10, 3:58 PM CST | Winter Storm Watch | LOT | 23 hr |
| Dec 10, 10:08 PM CST | Dense Fog Advisory | LOT | 7 hr |
| Dec 11, 12:58 PM CST | Lakeshore Flood Warning | LOT | 47 hr |
| Dec 11, 1:07 PM CST | Winter Storm Warning | LOT | 26 hr |
| Dec 12, 2:48 PM CST | Winter Storm Warning | LOT | 37 hr |
| Dec 19, 3:50 PM CST | Winter Weather Advisory | LOT | 42 hr |
| Dec 21, 2:43 PM CST | Dense Fog Advisory | LOT | 8 hr |
| Dec 21, 10:49 PM CST | Freezing Fog Advisory | LOT | 4 hr |
| Dec 31, 2:44 PM CST | Special Weather Statement | LOT | 46 min |
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 archive20092011
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.