Alert archive / Indiana / Clay County
Weather alerts in Clay County, Indiana, 2009
120 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Clay County and its neighbors
Each county as a circle sized by its count in 2009. Tap one for its archive.
- Alerts
- 120
- Warnings
- 37
- Watches
- 21
- Advisories
- 33
- Busiest month
- May33 alerts
- Busiest day
- May 14, 20099 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Clay County, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 15 | 10 | 33% | 0 | ||
| Flash flood warnings | 4 | 3 | 25% | 0 |
Each office's whole area, 2009
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Indianapolis, IN: tornado warnings | 26 | 3 | 88% | 7 | 43% | 11 min |
| NWS Indianapolis, IN: severe thunderstorm warnings | 136 | 70 | 49% | 201 | 69% | 21 min |
| NWS Indianapolis, IN: flash flood warnings | 43 | 16 | 63% | 28 | 82% | 46 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 5, 3:20 PM EST | Winter Weather Advisory | IND | 33 hr |
| Jan 12, 3:18 PM EST | Winter Weather Advisory | IND | 12 hr |
| Jan 13, 3:11 PM EST | Wind Chill Watch | IND | 13 hr |
| Jan 14, 3:50 AM EST | Wind Chill Advisory | IND | 3 days |
| Jan 25, 3:35 PM EST | Winter Storm Watch | IND | 24 hr |
| Jan 26, 3:25 PM EST | Winter Storm Warning | IND | 45 hr |
| Jan 26, 3:25 PM EST | Winter Weather Advisory | IND | 45 hr |
| Jan 27, 7:25 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 3, 12:16 PM EST | Winter Weather Advisory | IND | 7 hr |
| Feb 10, 3:42 AM EST | High Wind Watch | IND | 11 hr |
| Feb 10, 2:37 PM EST | High Wind Warning | IND | 34 hr |
| Feb 11, 6:38 AM EST | Areal Flood Advisory | IND | 103 days |
| Feb 11, 8:02 AM EST | Areal Flood Advisory | IND | 103 days |
| Feb 11, 9:11 AM EST | Areal Flood Warning | IND | 77 days |
| Feb 11, 10:46 AM EST | River Flood Warning | IND | 62 hr |
| Feb 11, 3:16 PM EST | Mesoscale Discussion | SPC | 89 min |
| Feb 11, 10:13 PM EST | Areal Flood Advisory | IND | 111 days |
| Feb 12, 12:56 AM EST | Wind Advisory | IND | 17 hr |
| Mar 5, 2:10 PM EST | Wind Advisory | IND | 4 hr |
| Mar 8, 5:13 AM EDT | Wind Advisory | IND | 23 hr |
| Mar 8, 11:39 AM EDT | Tornado Watch | SPC | 7 hr |
| Mar 10, 8:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| Mar 10, 10:59 PM EDT | Wind Advisory | IND | 9 hr |
| Mar 18, 3:22 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Mar 24, 3:34 AM EDT | Wind Advisory | IND | 19 hr |
| Apr 3, 9:20 AM EDT | Wind Advisory | IND | 6 hr |
| Apr 5, 11:50 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Apr 5, 8:23 PM EDT | Areal Flood Advisory | IND | 67 days |
| Apr 5, 10:30 PM EDT | Freeze Warning | IND | 35 hr |
| Apr 6, 3:49 AM EDT | Freeze Watch | IND | 35 hr |
| Apr 6, 4:14 AM EDT | Areal Flood Advisory | IND | 71 days |
| Apr 6, 6:21 AM EDT | River Flood Warning | IND | 25 hr |
| Apr 7, 3:05 PM EDT | Freeze Warning | IND | 18 hr |
| Apr 10, 1:20 PM EDT | Freeze Watch | IND | 23 hr |
| Apr 11, 12:45 PM EDT | Freeze Warning | IND | 20 hr |
| Apr 13, 4:58 PM EDT | Areal Flood Advisory | IND | 73 days |
| Apr 27, 3:20 AM EDT | Wind Advisory | IND | 11 hr |
| Apr 29, 6:34 AM EDT | Flash Flood Warning | IND | 67 min |
| May 7, 3:01 AM EDT | Dense Fog Advisory | IND | 5 hr |
| May 7, 8:04 AM EDT | Dense Fog Advisory | IND | 116 min |
| May 7, 7:14 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 13, 10:24 AM EDT | River Flood Warning | IND | 3 days |
| May 13, 10:27 AM EDT | Mesoscale Discussion | SPC | 63 min |
| May 13, 3:31 PM EDT | Flood Watch | IND | 15 hr |
| May 13, 7:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| May 13, 7:29 PM EDT | Areal Flood Warning | IND | 3 hr |
| May 13, 10:29 PM EDT | Areal Flood Warning | IND | 3 hr |
| May 14, 12:27 AM EDT | Mesoscale Discussion | SPC | 93 min |
| May 14, 1:42 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| May 14, 2:20 AM EDT | Flash Flood Warning | IND | 3 hr |
| May 14, 2:21 AM EDT | Severe Thunderstorm Warning | IND | 54 min |
| May 14, 2:37 AM EDT | Severe Thunderstorm Warning | IND | 53 min |
| May 14, 3:16 AM EDT | Severe Thunderstorm Warning | IND | 44 min |
| May 14, 6:08 AM EDT | Areal Flood Warning | IND | 3 hr |
| May 14, 8:45 AM EDT | Areal Flood Warning | IND | 12 hr |
| May 15, 6:31 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 15, 9:14 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 11:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 11:32 PM EDT | Areal Flood Warning | IND | 3 hr |
| May 15, 11:41 PM EDT | Areal Flood Warning | IND | 3 hr |
| May 17, 3:49 AM EDT | Frost Advisory | IND | 28 hr |
| May 27, 2:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| May 27, 9:10 PM EDT | Flash Flood Warning | IND | 95 min |
| May 27, 10:00 PM EDT | Flash Flood Warning | IND | 90 min |
| May 27, 10:40 PM EDT | Areal Flood Warning | IND | 3 hr |
| May 27, 11:31 PM EDT | Areal Flood Warning | IND | 3 hr |
| May 29, 8:16 PM EDT | Severe Thunderstorm Warning | IND | 44 min |
| May 29, 10:48 PM EDT | Areal Flood Warning | IND | 2 hr |
| May 30, 4:49 PM EDT | Severe Thunderstorm Watch | SPC | 11 hr |
| May 30, 7:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 30, 9:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jun 2, 12:58 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Jun 2, 3:18 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 2, 4:47 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Jun 2, 5:08 PM EDT | Severe Thunderstorm Warning | IND | 41 min |
| Jun 2, 5:44 PM EDT | Severe Thunderstorm Warning | IND | 22 min |
| Jun 2, 7:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 8, 9:49 AM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 10, 9:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 11, 12:06 AM EDT | Tornado Watch | SPC | 5 hr |
| Jun 11, 4:07 PM EDT | Mesoscale Discussion | SPC | 53 min |
| Jun 11, 4:42 PM EDT | Mesoscale Discussion | SPC | 33 min |
| Jun 18, 7:09 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 18, 7:30 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 8:39 AM EDT | Severe Thunderstorm Warning | IND | 51 min |
| Jun 19, 3:51 AM EDT | Heat Advisory | IND | 15 hr |
| Jun 19, 6:11 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 19, 6:59 PM EDT | Tornado Watch | SPC | 8 hr |
| Jun 19, 8:50 PM EDT | Severe Thunderstorm Warning | IND | 55 min |
| Jun 19, 9:28 PM EDT | Severe Thunderstorm Warning | IND | 47 min |
| Jun 19, 9:34 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 21, 3:23 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 26, 11:14 AM EDT | Heat Advisory | IND | 7 hr |
| Jul 24, 5:21 AM EDT | Dense Fog Advisory | IND | 4 hr |
| Jul 25, 12:46 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 25, 2:17 AM EDT | Severe Thunderstorm Warning | IND | 43 min |
| Jul 25, 2:26 AM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jul 25, 2:52 AM EDT | Severe Thunderstorm Warning | IND | 38 min |
| Aug 4, 9:24 AM EDT | Mesoscale Discussion | SPC | 36 min |
| Aug 4, 9:41 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 4, 11:22 AM EDT | Severe Thunderstorm Warning | IND | 38 min |
| Aug 4, 11:36 AM EDT | Severe Thunderstorm Warning | IND | 24 min |
| Aug 4, 12:03 PM EDT | Severe Thunderstorm Warning | IND | 42 min |
| Aug 8, 3:40 PM EDT | Heat Advisory | IND | 27 hr |
| Aug 10, 3:24 PM EDT | Mesoscale Discussion | SPC | 96 min |
| Aug 19, 4:19 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Aug 19, 6:11 PM EDT | Tornado Watch | SPC | 5 hr |
| Aug 19, 7:30 PM EDT | Severe Thunderstorm Warning | IND | 60 min |
| Sep 9, 5:37 AM EDT | Dense Fog Advisory | IND | 5 hr |
| Sep 26, 3:38 AM EDT | Dense Fog Advisory | IND | 6 hr |
| Sep 27, 3:54 PM EDT | Wind Advisory | IND | 28 hr |
| Sep 28, 12:21 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| Oct 7, 2:52 PM EDT | Flood Watch | IND | 47 hr |
| Oct 10, 3:00 PM EDT | Frost Advisory | IND | 18 hr |
| Oct 16, 3:44 PM EDT | Freeze Watch | IND | 23 hr |
| Oct 17, 3:05 PM EDT | Frost Advisory | IND | 17 hr |
| Nov 20, 6:34 AM EST | Dense Fog Advisory | IND | 4 hr |
| Dec 7, 3:15 PM EST | High Wind Watch | IND | 24 hr |
| Dec 8, 3:04 PM EST | Wind Advisory | IND | 30 hr |
| Dec 27, 4:12 AM EST | Winter Weather Advisory | IND | 17 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 | 15 |
| Severe Thunderstorm Watch | 8 |
| Tornado Watch | 4 |
| Mesoscale Discussion | 29 |
| Flooding | |
| Areal Flood Warning | 10 |
| Flash Flood Warning | 4 |
| River Flood Warning | 3 |
| Flood Watch | 2 |
| Areal Flood Advisory | 6 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 5 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 3 |
| Freeze Watch | 3 |
| Wind Chill Watch | 1 |
| Frost Advisory | 3 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 2 |
| Wind Advisory | 9 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20082010
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.