Alert archive / Indiana / Franklin County
Weather alerts in Franklin County, Indiana, 2020
96 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Franklin County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 96
- Warnings
- 25
- Watches
- 11
- Advisories
- 21
- Busiest month
- April16 alerts
- Busiest day
- March 20, 20205 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Franklin County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 10 | 7 | 30% | 3 | 67% | 32 min |
| Flash flood warnings | 1 | 1 | 0% | 3 | 67% | 168 min |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Wilmington, OH: tornado warnings | 24 | 12 | 50% | 32 | 56% | 10 min |
| NWS Wilmington, OH: severe thunderstorm warnings | 236 | 157 | 33% | 673 | 77% | 19 min |
| NWS Wilmington, OH: flash flood warnings | 38 | 25 | 34% | 85 | 79% | 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 10, 3:08 PM EST | Wind Advisory | ILN | 30 hr |
| Jan 11, 3:57 PM EST | High Wind Warning | ILN | 12 hr |
| Jan 15, 12:17 AM EST | Dense Fog Advisory | ILN | 13 hr |
| Feb 6, 1:52 PM EST | Winter Weather Advisory | ILN | 20 hr |
| Feb 7, 3:23 PM EST | Winter Weather Advisory | ILN | 19 hr |
| Feb 9, 1:58 PM EST | Special Weather Statement | ILN | 62 min |
| Feb 27, 11:30 PM EST | Special Weather Statement | ILN | 60 min |
| Mar 19, 4:12 AM EDT | Flash Flood Watch | ILN | 30 hr |
| Mar 20, 2:53 AM EDT | Severe Thunderstorm Warning | ILN | 35 min |
| Mar 20, 3:22 AM EDT | Mesoscale Discussion | SPC | 83 min |
| Mar 20, 5:12 AM EDT | Flash Flood Warning | ILN | 3 hr |
| Mar 20, 7:11 AM EDT | River Flood Advisory | ILN | 13 hr |
| Mar 20, 8:12 AM EDT | Areal Flood Warning | ILN | 24 hr |
| Mar 25, 8:26 AM EDT | Dense Fog Advisory | ILN | 3 hr |
| Mar 28, 1:42 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Mar 28, 3:29 PM EDT | Wind Advisory | ILN | 29 hr |
| Mar 28, 7:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Mar 28, 10:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Apr 8, 6:52 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 8, 7:24 PM EDT | Tornado Watch | SPC | 5 hr |
| Apr 8, 8:46 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Apr 8, 9:08 PM EDT | Severe Thunderstorm Warning | ILN | 67 min |
| Apr 8, 9:42 PM EDT | Severe Thunderstorm Warning | ILN | 51 min |
| Apr 9, 3:49 PM EDT | Freeze Watch | ILN | 12 hr |
| Apr 9, 3:49 PM EDT | Freeze Warning | ILN | 17 hr |
| Apr 10, 3:31 AM EDT | Freeze Warning | ILN | 29 hr |
| Apr 11, 3:32 PM EDT | High Wind Watch | ILN | 24 hr |
| Apr 12, 3:17 PM EDT | Wind Advisory | ILN | 27 hr |
| Apr 13, 3:44 PM EDT | Freeze Warning | ILN | 17 hr |
| Apr 14, 3:05 AM EDT | Freeze Warning | ILN | 30 hr |
| Apr 15, 3:56 AM EDT | Freeze Warning | ILN | 29 hr |
| Apr 17, 3:46 AM EDT | Freeze Warning | ILN | 29 hr |
| Apr 21, 3:46 AM EDT | Freeze Warning | ILN | 30 hr |
| Apr 29, 11:37 AM EDT | Special Weather Statement | ILN | 38 min |
| May 3, 12:10 AM EDT | Mesoscale Discussion | SPC | 95 min |
| May 7, 3:39 AM EDT | Freeze Warning | ILN | 53 hr |
| May 10, 12:20 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 2:13 PM EDT | Special Weather Statement | ILN | 32 min |
| May 10, 2:41 PM EDT | Special Weather Statement | ILN | 49 min |
| May 10, 2:52 PM EDT | Severe Thunderstorm Warning | ILN | 38 min |
| May 11, 3:14 AM EDT | Frost Advisory | ILN | 29 hr |
| May 17, 3:20 PM EDT | Flash Flood Watch | ILN | 4 days |
| May 23, 3:38 PM EDT | Severe Thunderstorm Warning | ILN | 67 min |
| May 23, 4:14 PM EDT | Mesoscale Discussion | SPC | 61 min |
| May 24, 4:32 PM EDT | Special Weather Statement | ILN | 28 min |
| May 27, 4:32 AM EDT | Special Weather Statement | ILN | 58 min |
| May 27, 5:16 AM EDT | Special Weather Statement | ILN | 59 min |
| May 27, 5:45 AM EDT | Areal Flood Advisory | ILN | 2 hr |
| May 29, 3:07 PM EDT | Areal Flood Advisory | ILN | 113 min |
| Jun 3, 6:24 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 3, 7:22 PM EDT | Severe Thunderstorm Warning | ILN | 23 min |
| Jun 3, 8:52 PM EDT | Severe Thunderstorm Warning | ILN | 23 min |
| Jun 4, 11:11 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 9, 6:36 PM EDT | Severe Thunderstorm Warning | ILN | 39 min |
| Jun 10, 1:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 10, 2:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 21, 1:00 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 27, 8:48 AM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 28, 7:43 AM EDT | Areal Flood Advisory | ILN | 2 hr |
| Jun 30, 3:06 PM EDT | Flash Flood Watch | ILN | 5 hr |
| Jul 7, 1:55 PM EDT | Special Weather Statement | ILN | 35 min |
| Jul 8, 3:29 PM EDT | Heat Advisory | ILN | 29 hr |
| Jul 11, 5:37 PM EDT | Special Weather Statement | ILN | 23 min |
| Jul 11, 6:01 PM EDT | Special Weather Statement | ILN | 29 min |
| Jul 11, 6:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Jul 12, 4:13 PM EDT | Special Weather Statement | ILN | 17 min |
| Jul 12, 4:30 PM EDT | Special Weather Statement | ILN | 30 min |
| Jul 18, 3:25 PM EDT | Heat Advisory | ILN | 29 hr |
| Jul 19, 4:18 PM EDT | Special Weather Statement | ILN | 27 min |
| Jul 19, 4:44 PM EDT | Special Weather Statement | ILN | 46 min |
| Jul 21, 11:23 PM EDT | Special Weather Statement | ILN | 52 min |
| Jul 27, 1:14 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Jul 27, 4:38 PM EDT | Special Weather Statement | ILN | 37 min |
| Jul 27, 5:05 PM EDT | Special Weather Statement | ILN | 25 min |
| Jul 27, 5:23 PM EDT | Special Weather Statement | ILN | 22 min |
| Jul 30, 11:15 AM EDT | Flash Flood Watch | ILN | 16 hr |
| Aug 10, 6:17 PM EDT | Mesoscale Discussion | SPC | 118 min |
| Aug 10, 8:05 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 10, 8:29 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 25, 4:33 PM EDT | Severe Thunderstorm Warning | ILN | 42 min |
| Aug 25, 5:21 PM EDT | Special Weather Statement | ILN | 24 min |
| Aug 25, 5:26 PM EDT | Severe Thunderstorm Warning | ILN | 49 min |
| Sep 1, 5:05 AM EDT | Dense Fog Advisory | ILN | 5 hr |
| Oct 2, 2:22 PM EDT | Frost Advisory | ILN | 18 hr |
| Oct 15, 3:51 AM EDT | Freeze Warning | ILN | 29 hr |
| Oct 16, 3:58 AM EDT | Frost Advisory | ILN | 29 hr |
| Oct 16, 1:38 PM EDT | Freeze Warning | ILN | 19 hr |
| Oct 23, 1:56 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Oct 23, 5:38 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 23, 5:48 PM EDT | Special Weather Statement | ILN | 27 min |
| Oct 29, 9:23 AM EDT | Areal Flood Advisory | ILN | 2 hr |
| Oct 30, 3:21 AM EDT | Freeze Warning | ILN | 31 hr |
| Nov 14, 3:09 AM EST | Wind Advisory | ILN | 40 hr |
| Nov 18, 3:46 PM EST | Wind Advisory | ILN | 25 hr |
| Nov 19, 10:05 AM EST | Red Flag Warning | ILN | 9 hr |
| Nov 29, 3:30 PM EST | Winter Weather Advisory | ILN | 43 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 | 10 |
| Severe Thunderstorm Watch | 4 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 21 |
| Flooding | |
| Areal Flood Warning | 1 |
| Flash Flood Warning | 1 |
| Flash Flood Watch | 4 |
| Areal Flood Advisory | 4 |
| River Flood Advisory | 1 |
| Winter | |
| Winter Weather Advisory | 3 |
| Heat | |
| Heat Advisory | 2 |
| Cold | |
| Freeze Warning | 11 |
| Freeze Watch | 1 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 5 |
| Fire | |
| Red Flag Warning | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 3 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
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.