Alert archive / South Carolina / Sumter County
Weather alerts in Sumter County, South Carolina, 2011
233 weather alerts in 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Sumter County and its neighbors
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Alerts
- 233
- Warnings
- 63
- Watches
- 21
- Advisories
- 75
- Busiest month
- April43 alerts
- Busiest day
- April 28, 201110 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 2 tornado warnings covering Sumter County in 2011 had a tornado report inside them; 2 of 2 tornado reports fell inside a warning, on average 13 minutes after it went out.
Sumter County, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 2 | 0% | 2 | 100% | 13 min |
| Severe thunderstorm warnings | 56 | 40 | 29% | 32 | 91% | 27 min |
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 40 min |
Each office's whole area, 2011
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Columbia, SC: tornado warnings | 13 | 8 | 38% | 11 | 100% | 15 min |
| NWS Columbia, SC: severe thunderstorm warnings | 298 | 199 | 33% | 543 | 86% | 28 min |
| NWS Columbia, SC: flash flood warnings | 15 | 4 | 73% | 11 | 82% | 30 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 1, 3:18 AM EST | Dense Fog Advisory | CAE | 7 hr |
| Jan 6, 3:48 AM EST | Lake Wind Advisory | CAE | 66 hr |
| Jan 7, 3:29 PM EST | Winter Storm Watch | CAE | 37 hr |
| Jan 9, 4:40 AM EST | Winter Storm Warning | CAE | 50 hr |
| Jan 10, 11:27 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Jan 11, 6:11 AM EST | Winter Weather Advisory | CAE | 6 hr |
| Jan 11, 3:03 PM EST | Lake Wind Advisory | CAE | 27 hr |
| Jan 26, 3:57 AM EST | Dense Fog Advisory | CAE | 5 hr |
| Jan 26, 3:57 AM EST | Lake Wind Advisory | CAE | 18 hr |
| Jan 28, 6:54 AM EST | Lake Wind Advisory | CAE | 10 hr |
| Feb 1, 3:16 PM EST | Lake Wind Advisory | CAE | 28 hr |
| Feb 7, 10:03 PM EST | Lake Wind Advisory | CAE | 8 hr |
| Feb 9, 2:50 PM EST | Winter Weather Advisory | CAE | 17 hr |
| Feb 13, 2:58 PM EST | Lake Wind Advisory | CAE | 36 hr |
| Feb 20, 3:11 PM EST | Fire Weather Watch | CAE | 28 hr |
| Feb 20, 3:11 PM EST | Lake Wind Advisory | CAE | 46 hr |
| Feb 24, 10:40 AM EST | Lake Wind Advisory | CAE | 32 hr |
| Feb 27, 4:50 AM EST | Dense Fog Advisory | CAE | 5 hr |
| Feb 27, 8:25 PM EST | Lake Wind Advisory | CAE | 40 hr |
| Feb 28, 5:04 PM EST | Severe Thunderstorm Watch | SPC | 5 hr |
| Feb 28, 7:36 PM EST | Mesoscale Discussion | SPC | 84 min |
| Feb 28, 8:42 PM EST | Mesoscale Discussion | SPC | 63 min |
| Feb 28, 8:49 PM EST | Severe Thunderstorm Warning | CAE | 29 min |
| Mar 5, 3:12 PM EST | Lake Wind Advisory | CAE | 29 hr |
| Mar 9, 4:09 AM EST | Lake Wind Advisory | CAE | 43 hr |
| Mar 22, 3:15 PM EDT | Lake Wind Advisory | CAE | 52 hr |
| Apr 1, 7:33 AM EDT | Lake Wind Advisory | CAE | 12 hr |
| Apr 1, 2:55 PM EDT | Lake Wind Advisory | CAE | 29 hr |
| Apr 3, 2:47 PM EDT | Lake Wind Advisory | CAE | 52 hr |
| Apr 5, 12:21 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 5, 12:48 AM EDT | Tornado Watch | SPC | 5 hr |
| Apr 5, 3:34 AM EDT | Mesoscale Discussion | SPC | 116 min |
| Apr 5, 4:00 AM EDT | Severe Thunderstorm Warning | CAE | 60 min |
| Apr 5, 4:57 AM EDT | Severe Thunderstorm Warning | CAE | 63 min |
| Apr 9, 2:44 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 9, 5:36 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Apr 9, 6:16 PM EDT | Tornado Watch | SPC | 6 hr |
| Apr 9, 7:58 PM EDT | Severe Thunderstorm Warning | CAE | 47 min |
| Apr 9, 7:59 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Apr 9, 9:21 PM EDT | Severe Thunderstorm Warning | CAE | 39 min |
| Apr 9, 9:31 PM EDT | Severe Thunderstorm Warning | CAE | 59 min |
| Apr 9, 10:24 PM EDT | Severe Thunderstorm Warning | CAE | 51 min |
| Apr 9, 10:30 PM EDT | Severe Thunderstorm Warning | CAE | 45 min |
| Apr 9, 10:39 PM EDT | Mesoscale Discussion | SPC | 66 min |
| Apr 10, 1:59 PM EDT | Lake Wind Advisory | CAE | 54 hr |
| Apr 12, 5:02 AM EDT | Special Weather Statement | CAE | 58 min |
| Apr 15, 3:01 PM EDT | Lake Wind Advisory | CAE | 29 hr |
| Apr 16, 5:57 AM EDT | Tornado Watch | SPC | 8 hr |
| Apr 16, 10:39 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 16, 12:02 PM EDT | Tornado Watch | SPC | 11 hr |
| Apr 16, 1:26 PM EDT | Severe Thunderstorm Warning | CAE | 49 min |
| Apr 16, 2:11 PM EDT | Severe Thunderstorm Warning | CAE | 49 min |
| Apr 16, 2:17 PM EDT | Severe Thunderstorm Warning | CAE | 43 min |
| Apr 16, 2:28 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Apr 16, 2:48 PM EDT | Severe Thunderstorm Warning | CAE | 42 min |
| Apr 23, 6:31 AM EDT | Dense Fog Advisory | CAE | 3 hr |
| Apr 26, 2:09 PM EDT | Lake Wind Advisory | CAE | 54 hr |
| Apr 26, 2:16 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Apr 27, 12:51 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Apr 28, 4:30 AM EDT | Tornado Watch | SPC | 10 hr |
| Apr 28, 6:54 AM EDT | Severe Thunderstorm Warning | CAE | 66 min |
| Apr 28, 7:20 AM EDT | Severe Thunderstorm Warning | CAE | 55 min |
| Apr 28, 7:30 AM EDT | Tornado Warning | CAE | 45 min |
| Apr 28, 8:05 AM EDT | Tornado Warning | CAE | 25 min |
| Apr 28, 8:05 AM EDT | Mesoscale Discussion | SPC | 85 min |
| Apr 28, 8:16 AM EDT | Severe Thunderstorm Warning | CAE | 59 min |
| Apr 28, 9:22 AM EDT | Severe Thunderstorm Warning | CAE | 53 min |
| Apr 28, 11:16 AM EDT | Severe Thunderstorm Warning | CAE | 44 min |
| Apr 28, 11:22 AM EDT | Mesoscale Discussion | SPC | 53 min |
| May 7, 12:58 AM EDT | Dense Fog Advisory | CAE | 6 hr |
| May 10, 2:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| May 10, 3:20 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 10, 6:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| May 10, 9:01 PM EDT | Mesoscale Discussion | SPC | 59 min |
| May 11, 12:41 AM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 11, 1:36 AM EDT | Severe Thunderstorm Warning | CAE | 54 min |
| May 11, 2:10 AM EDT | Severe Thunderstorm Warning | CAE | 80 min |
| May 12, 4:28 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 13, 8:35 PM EDT | Severe Thunderstorm Warning | CAE | 55 min |
| May 13, 9:07 PM EDT | Severe Thunderstorm Warning | CAE | 68 min |
| May 13, 9:49 PM EDT | Severe Thunderstorm Warning | CAE | 71 min |
| May 13, 10:14 PM EDT | Severe Thunderstorm Warning | CAE | 31 min |
| May 17, 6:51 PM EDT | Mesoscale Discussion | SPC | 114 min |
| May 22, 7:17 AM EDT | Dense Fog Advisory | CAE | 103 min |
| May 27, 11:26 AM EDT | Mesoscale Discussion | SPC | 94 min |
| May 27, 12:06 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 27, 3:22 PM EDT | Severe Thunderstorm Warning | CAE | 53 min |
| May 27, 4:27 PM EDT | Severe Thunderstorm Warning | CAE | 48 min |
| May 27, 4:40 PM EDT | Severe Thunderstorm Warning | CAE | 50 min |
| May 27, 6:24 PM EDT | Mesoscale Discussion | SPC | 66 min |
| May 28, 12:56 AM EDT | Severe Thunderstorm Warning | CAE | 64 min |
| May 28, 2:59 AM EDT | Severe Thunderstorm Warning | CAE | 61 min |
| Jun 2, 2:50 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Jun 2, 6:22 PM EDT | Special Weather Statement | CAE | 53 min |
| Jun 2, 6:45 PM EDT | Mesoscale Discussion | SPC | 90 min |
| Jun 2, 8:37 PM EDT | Severe Thunderstorm Warning | CAE | 53 min |
| Jun 2, 9:00 PM EDT | Severe Thunderstorm Warning | CAE | 45 min |
| Jun 2, 9:42 PM EDT | Severe Thunderstorm Warning | CAE | 48 min |
| Jun 3, 5:54 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 8:45 PM EDT | Severe Thunderstorm Warning | CAE | 45 min |
| Jun 12, 9:39 PM EDT | Severe Thunderstorm Warning | CAE | 51 min |
| Jun 13, 11:52 PM EDT | Special Weather Statement | CAE | 68 min |
| Jun 14, 12:19 AM EDT | Severe Thunderstorm Warning | CAE | 56 min |
| Jun 14, 1:11 AM EDT | Severe Thunderstorm Warning | CAE | 79 min |
| Jun 15, 7:35 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 15, 8:46 PM EDT | Severe Thunderstorm Warning | CAE | 44 min |
| Jun 15, 9:28 PM EDT | Severe Thunderstorm Warning | CAE | 62 min |
| Jun 18, 4:08 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 18, 5:46 PM EDT | Mesoscale Discussion | SPC | 59 min |
| Jun 18, 5:59 PM EDT | Severe Thunderstorm Warning | CAE | 61 min |
| Jun 18, 6:49 PM EDT | Mesoscale Discussion | SPC | 86 min |
| Jun 18, 9:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jun 19, 1:29 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jun 19, 2:22 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 19, 4:13 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 19, 6:58 PM EDT | Mesoscale Discussion | SPC | 62 min |
| Jun 20, 1:09 AM EDT | Mesoscale Discussion | SPC | 96 min |
| Jun 20, 3:24 AM EDT | Heat Advisory | CAE | 17 hr |
| Jun 21, 4:07 AM EDT | Heat Advisory | CAE | 15 hr |
| Jun 21, 10:41 PM EDT | Severe Thunderstorm Warning | CAE | 34 min |
| Jun 21, 10:57 PM EDT | Severe Thunderstorm Warning | CAE | 63 min |
| Jun 22, 1:14 AM EDT | Severe Thunderstorm Warning | CAE | 46 min |
| Jun 23, 1:40 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 23, 2:16 PM EDT | Severe Thunderstorm Warning | CAE | 44 min |
| Jun 23, 2:36 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 23, 2:55 PM EDT | Severe Thunderstorm Warning | CAE | 65 min |
| Jun 28, 1:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jun 28, 3:05 PM EDT | Severe Thunderstorm Warning | CAE | 40 min |
| Jun 28, 3:38 PM EDT | Severe Thunderstorm Warning | CAE | 22 min |
| Jul 4, 6:44 PM EDT | Mesoscale Discussion | SPC | 61 min |
| Jul 5, 6:56 PM EDT | Severe Thunderstorm Warning | CAE | 49 min |
| Jul 5, 7:41 PM EDT | Severe Thunderstorm Warning | CAE | 49 min |
| Jul 6, 12:53 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Jul 7, 6:14 AM EDT | Dense Fog Advisory | CAE | 3 hr |
| Jul 8, 1:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Jul 9, 1:18 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Jul 11, 5:39 AM EDT | Dense Fog Advisory | CAE | 3 hr |
| Jul 11, 2:43 PM EDT | Heat Advisory | CAE | 22 hr |
| Jul 12, 12:37 PM EDT | Excessive Heat Warning | CAE | 8 hr |
| Jul 12, 9:34 PM EDT | Heat Advisory | CAE | 20 hr |
| Jul 13, 3:51 AM EDT | Excessive Heat Warning | CAE | 13 hr |
| Jul 20, 10:48 AM EDT | Heat Advisory | CAE | 7 hr |
| Jul 20, 2:57 PM EDT | Heat Advisory | CAE | 29 hr |
| Jul 21, 2:19 PM EDT | Heat Advisory | CAE | 30 hr |
| Jul 22, 2:46 PM EDT | Heat Advisory | CAE | 29 hr |
| Jul 23, 2:57 PM EDT | Heat Advisory | CAE | 29 hr |
| Jul 25, 7:23 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Jul 26, 4:05 PM EDT | Mesoscale Discussion | SPC | 85 min |
| Jul 29, 3:24 AM EDT | Heat Advisory | CAE | 16 hr |
| Jul 29, 7:04 PM EDT | Heat Advisory | CAE | 25 hr |
| Jul 31, 2:57 AM EDT | Heat Advisory | CAE | 15 hr |
| Jul 31, 1:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Jul 31, 3:12 PM EDT | Special Weather Statement | CAE | 63 min |
| Aug 3, 3:07 AM EDT | Heat Advisory | CAE | 16 hr |
| Aug 3, 7:32 PM EDT | Heat Advisory | CAE | 24 hr |
| Aug 4, 8:37 PM EDT | Heat Advisory | CAE | 21 hr |
| Aug 5, 4:48 PM EDT | Special Weather Statement | CAE | 57 min |
| Aug 6, 3:35 AM EDT | Heat Advisory | CAE | 15 hr |
| Aug 6, 5:49 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 6, 7:49 PM EDT | Special Weather Statement | CAE | 56 min |
| Aug 7, 3:37 AM EDT | Heat Advisory | CAE | 16 hr |
| Aug 7, 9:49 PM EDT | Heat Advisory | CAE | 21 hr |
| Aug 8, 9:47 PM EDT | Heat Advisory | CAE | 21 hr |
| Aug 11, 7:59 PM EDT | Special Weather Statement | CAE | 61 min |
| Aug 12, 12:29 PM EDT | Special Weather Statement | CAE | 61 min |
| Aug 12, 12:48 PM EDT | Areal Flood Advisory | CAE | 3 hr |
| Aug 12, 1:46 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 8:35 AM EDT | Special Weather Statement | CAE | 55 min |
| Aug 13, 9:28 AM EDT | Areal Flood Advisory | CAE | 2 hr |
| Aug 13, 4:20 PM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 14, 2:24 PM EDT | Mesoscale Discussion | SPC | 36 min |
| Aug 14, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 14, 4:02 PM EDT | Special Weather Statement | CAE | 58 min |
| Aug 14, 4:32 PM EDT | Severe Thunderstorm Warning | CAE | 58 min |
| Aug 14, 6:25 PM EDT | Severe Thunderstorm Warning | CAE | 65 min |
| Aug 20, 5:08 PM EDT | Severe Thunderstorm Warning | CAE | 37 min |
| Aug 22, 2:02 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Aug 26, 12:57 PM EDT | Lake Wind Advisory | CAE | 29 hr |
| Aug 29, 11:08 AM EDT | Mesoscale Discussion | SPC | 97 min |
| Aug 29, 2:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 3:56 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 29, 6:54 PM EDT | Severe Thunderstorm Warning | CAE | 51 min |
| Aug 29, 7:53 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 29, 8:22 PM EDT | Severe Thunderstorm Warning | CAE | 38 min |
| Sep 5, 1:18 PM EDT | Lake Wind Advisory | CAE | 29 hr |
| Sep 5, 5:48 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Sep 5, 6:12 PM EDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Sep 5, 8:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 6, 4:36 AM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 6, 10:11 AM EDT | Tornado Watch | SPC | 7 hr |
| Sep 12, 2:31 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Sep 15, 2:30 PM EDT | Lake Wind Advisory | CAE | 30 hr |
| Sep 21, 7:03 PM EDT | Special Weather Statement | CAE | 72 min |
| Sep 24, 5:06 PM EDT | Special Weather Statement | CAE | 54 min |
| Sep 24, 5:36 PM EDT | Areal Flood Advisory | CAE | 114 min |
| Sep 25, 6:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 25, 6:22 PM EDT | Severe Thunderstorm Warning | CAE | 53 min |
| Sep 25, 7:07 PM EDT | Severe Thunderstorm Warning | CAE | 53 min |
| Sep 25, 8:05 PM EDT | Special Weather Statement | CAE | 55 min |
| Sep 25, 8:35 PM EDT | Flash Flood Warning | CAE | 115 min |
| Sep 26, 6:04 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Sep 30, 9:15 AM EDT | Lake Wind Advisory | CAE | 33 hr |
| Sep 30, 5:32 PM EDT | Mesoscale Discussion | SPC | 88 min |
| Oct 9, 4:00 AM EDT | Lake Wind Advisory | CAE | 15 hr |
| Oct 10, 3:55 AM EDT | Lake Wind Advisory | CAE | 24 hr |
| Oct 13, 7:39 PM EDT | Special Weather Statement | CAE | 81 min |
| Oct 13, 7:45 PM EDT | Severe Thunderstorm Warning | CAE | 75 min |
| Oct 14, 2:14 AM EDT | Lake Wind Advisory | CAE | 18 hr |
| Oct 18, 6:31 AM EDT | Dense Fog Advisory | CAE | 3 hr |
| Oct 18, 10:32 AM EDT | Dense Fog Advisory | CAE | 67 min |
| Oct 19, 2:13 AM EDT | Lake Wind Advisory | CAE | 42 hr |
| Oct 19, 3:46 PM EDT | Mesoscale Discussion | SPC | 89 min |
| Oct 29, 4:08 AM EDT | Frost Advisory | CAE | 29 hr |
| Oct 29, 4:08 AM EDT | Lake Wind Advisory | CAE | 15 hr |
| Nov 1, 9:38 AM EDT | Frost Advisory | CAE | 23 hr |
| Nov 4, 4:23 AM EDT | Lake Wind Advisory | CAE | 38 hr |
| Nov 10, 5:31 AM EST | Lake Wind Advisory | CAE | 23 hr |
| Nov 11, 1:38 AM EST | Freeze Warning | CAE | 30 hr |
| Nov 16, 3:48 AM EST | Lake Wind Advisory | CAE | 20 hr |
| Nov 16, 4:06 PM EST | Mesoscale Discussion | SPC | 114 min |
| Nov 16, 4:30 PM EST | Tornado Watch | SPC | 7 hr |
| Nov 16, 6:48 PM EST | Mesoscale Discussion | SPC | 87 min |
| Nov 17, 10:17 AM EST | Lake Wind Advisory | CAE | 12 hr |
| Nov 23, 12:51 AM EST | Lake Wind Advisory | CAE | 17 hr |
| Nov 28, 3:55 AM EST | Lake Wind Advisory | CAE | 15 hr |
| Nov 29, 2:54 AM EST | Lake Wind Advisory | CAE | 8 hr |
| Dec 5, 10:45 PM EST | Dense Fog Advisory | CAE | 11 hr |
| Dec 7, 3:49 AM EST | Lake Wind Advisory | CAE | 20 hr |
| Dec 7, 2:53 PM EST | Special Weather Statement | CAE | 67 min |
| Dec 7, 3:29 PM EST | Special Weather Statement | CAE | 46 min |
| Dec 26, 5:33 AM EST | Dense Fog Advisory | CAE | 2 hr |
| Dec 27, 3:15 AM EST | Lake Wind Advisory | CAE | 27 hr |
| Dec 27, 11:14 AM EST | Severe Thunderstorm Warning | CAE | 46 min |
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 | 56 |
| Tornado Warning | 2 |
| Severe Thunderstorm Watch | 12 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 58 |
| Special Weather Statement | 16 |
| Flooding | |
| Flash Flood Warning | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 2 |
| Heat Advisory | 19 |
| Cold | |
| Freeze Warning | 1 |
| Frost Advisory | 2 |
| Wind and dust | |
| Lake Wind Advisory | 37 |
| Fire | |
| Fire Weather Watch | 1 |
| Fog and smoke | |
| Dense Fog Advisory | 12 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.