Alert archive / Indiana / Hamilton County
Weather alerts in Hamilton County, Indiana, 2023
120 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Hamilton County and its neighbors
Each county as a circle sized by its count in 2023. Tap one for its archive.
- Alerts
- 120
- Warnings
- 41
- Watches
- 17
- Advisories
- 32
- Busiest month
- July29 alerts
- Busiest day
- June 25, 20238 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
2 of 4 tornado warnings covering Hamilton County in 2023 had a tornado report inside them.
Hamilton County, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 4 | 2 | 50% | 0 | ||
| Severe thunderstorm warnings | 26 | 19 | 27% | 13 | 54% | 19 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2023
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Indianapolis, IN: tornado warnings | 34 | 13 | 62% | 22 | 82% | 11 min |
| NWS Indianapolis, IN: severe thunderstorm warnings | 197 | 131 | 34% | 304 | 78% | 19 min |
| NWS Indianapolis, IN: flash flood warnings | 4 | 1 | 75% | 1 | 100% | 72 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 12:41 AM EST | Dense Fog Advisory | IND | 12 hr |
| Jan 2, 4:38 PM EST | Dense Fog Advisory | IND | 7 hr |
| Jan 11, 2:44 PM EST | Dense Fog Advisory | IND | 17 hr |
| Jan 19, 1:13 PM EST | Mesoscale Discussion | SPC | 2 hr |
| Jan 23, 3:37 AM EST | Winter Storm Watch | IND | 23 hr |
| Jan 24, 3:02 AM EST | Winter Storm Warning | IND | 34 hr |
| Jan 25, 1:07 PM EST | Winter Weather Advisory | IND | 100 min |
| Jan 30, 2:57 AM EST | Winter Weather Advisory | IND | 11 hr |
| Feb 7, 3:06 PM EST | High Wind Watch | IND | 24 hr |
| Feb 8, 2:47 PM EST | High Wind Warning | IND | 28 hr |
| Feb 14, 3:18 AM EST | Wind Advisory | IND | 31 hr |
| Feb 21, 2:52 PM EST | Wind Advisory | IND | 29 hr |
| Feb 22, 11:59 AM EST | Mesoscale Discussion | SPC | 91 min |
| Feb 26, 3:21 AM EST | Wind Advisory | IND | 40 hr |
| Feb 27, 10:44 AM EST | Mesoscale Discussion | SPC | 61 min |
| Feb 27, 11:06 AM EST | Tornado Watch | SPC | 5 hr |
| Feb 27, 12:37 PM EST | Mesoscale Discussion | SPC | 113 min |
| Feb 27, 1:01 PM EST | Special Weather Statement | IND | 29 min |
| Feb 27, 1:12 PM EST | Severe Thunderstorm Warning | IND | 33 min |
| Feb 27, 1:32 PM EST | Tornado Warning | IND | 28 min |
| Mar 2, 2:42 AM EST | Flood Watch | IND | 43 hr |
| Mar 2, 2:48 PM EST | Wind Advisory | IND | 32 hr |
| Mar 3, 1:40 PM EST | High Wind Warning | IND | 9 hr |
| Mar 3, 10:56 PM EST | Areal Flood Warning | IND | 16 hr |
| Mar 4, 11:48 AM EST | River Flood Warning | IND | 34 hr |
| Mar 24, 12:28 PM EDT | Wind Advisory | IND | 31 hr |
| Mar 25, 12:30 PM EDT | River Flood Warning | IND | 34 hr |
| Mar 31, 4:09 AM EDT | Wind Advisory | IND | 23 hr |
| Mar 31, 7:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Mar 31, 7:59 PM EDT | Tornado Watch | SPC | 7 hr |
| Mar 31, 10:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Mar 31, 10:40 PM EDT | Severe Thunderstorm Warning | IND | 35 min |
| Mar 31, 10:42 PM EDT | Tornado Warning | IND | 33 min |
| Mar 31, 11:11 PM EDT | Severe Thunderstorm Warning | IND | 34 min |
| Mar 31, 11:24 PM EDT | Severe Thunderstorm Warning | IND | 36 min |
| Apr 1, 2:44 AM EDT | Wind Advisory | IND | 15 hr |
| Apr 1, 10:36 AM EDT | High Wind Warning | IND | 5 hr |
| Apr 4, 2:24 PM EDT | Wind Advisory | IND | 27 hr |
| Apr 5, 6:19 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Apr 5, 8:53 AM EDT | Severe Thunderstorm Warning | IND | 22 min |
| Apr 5, 10:09 AM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 5, 10:25 AM EDT | Tornado Watch | SPC | 7 hr |
| Apr 5, 11:51 AM EDT | Severe Thunderstorm Warning | IND | 39 min |
| Apr 5, 12:24 PM EDT | Severe Thunderstorm Warning | IND | 36 min |
| Apr 5, 12:28 PM EDT | Severe Thunderstorm Warning | IND | 32 min |
| Apr 17, 3:34 PM EDT | Frost Advisory | IND | 17 hr |
| Apr 19, 4:14 PM EDT | Red Flag Warning | IND | 28 hr |
| Apr 23, 3:05 AM EDT | Freeze Warning | IND | 30 hr |
| Apr 25, 2:17 PM EDT | Frost Advisory | IND | 18 hr |
| Apr 26, 3:23 PM EDT | Frost Advisory | IND | 17 hr |
| Apr 30, 2:34 PM EDT | Special Weather Statement | IND | 41 min |
| May 3, 3:22 PM EDT | Frost Advisory | IND | 18 hr |
| May 7, 1:51 AM EDT | Severe Thunderstorm Warning | IND | 22 min |
| May 7, 2:42 AM EDT | Severe Thunderstorm Warning | IND | 48 min |
| May 7, 4:21 AM EDT | Special Weather Statement | IND | 54 min |
| Jun 25, 12:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 25, 1:34 PM EDT | Tornado Watch | SPC | 6 hr |
| Jun 25, 3:29 PM EDT | Tornado Warning | IND | 31 min |
| Jun 25, 3:56 PM EDT | Tornado Warning | IND | 34 min |
| Jun 25, 4:01 PM EDT | Severe Thunderstorm Warning | IND | 30 min |
| Jun 25, 4:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 25, 4:25 PM EDT | Severe Thunderstorm Warning | IND | 35 min |
| Jun 25, 4:36 PM EDT | Severe Thunderstorm Warning | IND | 24 min |
| Jun 29, 2:08 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 29, 3:23 PM EDT | Severe Thunderstorm Warning | IND | 52 min |
| Jun 29, 3:27 PM EDT | Severe Thunderstorm Warning | IND | 48 min |
| Jun 29, 3:55 PM EDT | Severe Thunderstorm Warning | IND | 50 min |
| Jul 1, 4:55 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 2, 2:05 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 2, 3:51 PM EDT | Severe Thunderstorm Warning | IND | 24 min |
| Jul 2, 4:12 PM EDT | Severe Thunderstorm Warning | IND | 33 min |
| Jul 5, 11:29 PM EDT | Special Weather Statement | IND | 61 min |
| Jul 16, 6:10 PM EDT | Severe Thunderstorm Warning | IND | 35 min |
| Jul 16, 6:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 16, 7:29 PM EDT | Severe Thunderstorm Warning | IND | 31 min |
| Jul 16, 8:30 PM EDT | Areal Flood Advisory | IND | 86 min |
| Jul 17, 4:01 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Jul 17, 4:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 17, 5:23 PM EDT | Special Weather Statement | IND | 37 min |
| Jul 17, 5:38 PM EDT | Severe Thunderstorm Warning | IND | 41 min |
| Jul 17, 5:46 PM EDT | Severe Thunderstorm Warning | IND | 29 min |
| Jul 17, 5:51 PM EDT | Severe Thunderstorm Warning | IND | 24 min |
| Jul 17, 6:22 PM EDT | Severe Thunderstorm Warning | IND | 23 min |
| Jul 20, 2:15 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jul 20, 2:45 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 20, 5:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 24, 2:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Jul 24, 3:37 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 24, 4:18 PM EDT | Severe Thunderstorm Warning | IND | 27 min |
| Jul 26, 1:55 AM EDT | Severe Thunderstorm Warning | IND | 35 min |
| Jul 26, 2:28 AM EDT | Special Weather Statement | IND | 32 min |
| Jul 26, 3:04 AM EDT | Heat Advisory | IND | 67 hr |
| Jul 28, 6:59 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 28, 8:13 AM EDT | Special Weather Statement | IND | 47 min |
| Jul 29, 1:57 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 29, 2:34 AM EDT | Special Weather Statement | IND | 41 min |
| Aug 5, 5:46 PM EDT | Tornado Watch | SPC | 5 hr |
| Aug 5, 7:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 5, 8:43 PM EDT | Areal Flood Advisory | IND | 3 hr |
| Aug 5, 9:45 PM EDT | Areal Flood Advisory | IND | 3 hr |
| Aug 9, 11:58 AM EDT | Flood Watch | IND | 12 hr |
| Aug 9, 1:18 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 9, 8:57 PM EDT | Areal Flood Advisory | IND | 6 hr |
| Aug 14, 4:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 19, 2:58 PM EDT | Heat Advisory | IND | 5 days |
| Aug 21, 4:06 AM EDT | Excessive Heat Watch | IND | 47 hr |
| Aug 22, 3:23 AM EDT | Excessive Heat Warning | IND | 4 days |
| Aug 25, 2:55 AM EDT | Heat Advisory | IND | 17 hr |
| Sep 26, 6:07 PM EDT | Special Weather Statement | IND | 38 min |
| Sep 28, 4:30 AM EDT | Dense Fog Advisory | IND | 6 hr |
| Sep 28, 3:01 PM EDT | Dense Fog Advisory | IND | 19 hr |
| Oct 9, 2:30 PM EDT | Frost Advisory | IND | 19 hr |
| Oct 10, 2:38 PM EDT | Frost Advisory | IND | 18 hr |
| Oct 22, 3:31 AM EDT | Frost Advisory | IND | 29 hr |
| Oct 29, 3:44 AM EDT | Freeze Watch | IND | 22 hr |
| Oct 30, 2:13 AM EDT | Freeze Warning | IND | 32 hr |
| Nov 5, 2:37 AM EST | Dense Fog Advisory | IND | 7 hr |
| Nov 7, 6:51 AM EST | Dense Fog Advisory | IND | 2 hr |
| Dec 18, 10:49 AM EST | Special Weather Statement | IND | 26 min |
| Dec 23, 5:16 PM EST | Dense Fog Advisory | IND | 19 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 archive20222024
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.