Alert archive / Maine / York County
Weather alerts in York County, Maine, 2018
239 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
York County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 239
- Warnings
- 41
- Watches
- 22
- Advisories
- 99
- Busiest month
- July37 alerts
- Busiest day
- August 3, 20189 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
York County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 16 | 12 | 25% | 9 | 100% | 20 min |
| Flash flood warnings | 2 | 1 | 50% | 0 |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Gray, ME: tornado warnings | 8 | 1 | 88% | 3 | 33% | 20 min |
| NWS Gray, ME: severe thunderstorm warnings | 104 | 78 | 25% | 223 | 84% | 24 min |
| NWS Gray, ME: flash flood warnings | 16 | 7 | 56% | 21 | 76% | 73 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, 2:51 PM EST | Winter Storm Watch | GYX | 24 hr |
| Jan 2, 9:52 PM EST | Coastal Flood Watch | GYX | 18 hr |
| Jan 3, 3:54 AM EST | Blizzard Warning | GYX | 47 hr |
| Jan 3, 3:11 PM EST | Winter Storm Warning | GYX | 36 hr |
| Jan 3, 3:43 PM EST | Coastal Flood Warning | GYX | 23 hr |
| Jan 4, 11:34 AM EST | Mesoscale Discussion | SPC | 5 hr |
| Jan 4, 2:58 PM EST | Wind Chill Watch | GYX | 12 hr |
| Jan 4, 3:12 PM EST | Coastal Flood Advisory | GYX | 11 hr |
| Jan 5, 3:04 AM EST | Wind Chill Warning | GYX | 55 hr |
| Jan 5, 3:04 AM EST | Wind Chill Advisory | GYX | 55 hr |
| Jan 9, 9:38 AM EST | Special Weather Statement | GYX | 67 min |
| Jan 10, 2:57 AM EST | Winter Weather Advisory | GYX | 27 hr |
| Jan 11, 3:44 PM EST | Flood Watch | GYX | 44 hr |
| Jan 12, 4:34 AM EST | Winter Weather Advisory | GYX | 33 hr |
| Jan 12, 7:59 AM EST | Dense Fog Advisory | GYX | 21 hr |
| Jan 15, 3:07 PM EST | Winter Storm Watch | GYX | 12 hr |
| Jan 16, 3:33 AM EST | Winter Storm Warning | GYX | 39 hr |
| Jan 16, 3:33 AM EST | Winter Weather Advisory | GYX | 39 hr |
| Jan 21, 2:57 PM EST | Flood Watch | GYX | 48 hr |
| Jan 22, 3:06 AM EST | Winter Weather Advisory | GYX | 41 hr |
| Jan 30, 8:02 AM EST | Coastal Flood Advisory | GYX | 3 hr |
| Feb 1, 9:07 AM EST | Coastal Flood Advisory | GYX | 4 hr |
| Feb 2, 8:50 AM EST | Coastal Flood Statement | GYX | 4 hr |
| Feb 5, 3:14 PM EST | Winter Storm Watch | GYX | 24 hr |
| Feb 6, 3:18 PM EST | Winter Storm Warning | GYX | 32 hr |
| Feb 7, 11:25 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 7, 6:21 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Feb 10, 3:27 AM EST | Winter Weather Advisory | GYX | 42 hr |
| Feb 10, 7:48 PM EST | Dense Fog Advisory | GYX | 8 hr |
| Feb 17, 3:21 AM EST | Winter Weather Advisory | GYX | 30 hr |
| Feb 17, 11:52 PM EST | Winter Storm Warning | GYX | 7 hr |
| Feb 20, 3:22 PM EST | Dense Fog Advisory | GYX | 21 hr |
| Feb 23, 2:42 AM EST | Winter Weather Advisory | GYX | 19 hr |
| Feb 24, 3:18 PM EST | Winter Weather Advisory | GYX | 27 hr |
| Feb 26, 7:18 AM EST | Dense Fog Advisory | GYX | 102 min |
| Feb 28, 10:53 AM EST | Coastal Flood Watch | GYX | 29 hr |
| Feb 28, 3:16 PM EST | High Wind Watch | GYX | 24 hr |
| Mar 1, 3:24 PM EST | High Wind Warning | GYX | 24 hr |
| Mar 1, 3:24 PM EST | Wind Advisory | GYX | 30 hr |
| Mar 1, 3:42 PM EST | Coastal Flood Warning | GYX | 46 hr |
| Mar 2, 3:14 AM EST | Winter Weather Advisory | GYX | 16 hr |
| Mar 3, 1:42 PM EST | Coastal Flood Advisory | GYX | 12 hr |
| Mar 3, 8:04 PM EST | Coastal Flood Warning | GYX | 6 hr |
| Mar 4, 2:56 AM EST | Coastal Flood Advisory | GYX | 12 hr |
| Mar 4, 8:50 AM EST | Coastal Flood Warning | GYX | 6 hr |
| Mar 4, 3:16 PM EST | Coastal Flood Warning | GYX | 12 hr |
| Mar 5, 2:48 AM EST | Coastal Flood Advisory | GYX | 12 hr |
| Mar 5, 3:36 AM EST | Winter Storm Watch | GYX | 24 hr |
| Mar 5, 4:44 PM EST | Coastal Flood Advisory | GYX | 10 hr |
| Mar 6, 2:36 AM EST | Coastal Flood Statement | GYX | 12 hr |
| Mar 6, 3:38 AM EST | Winter Storm Warning | GYX | 63 hr |
| Mar 6, 3:11 PM EST | Coastal Flood Watch | GYX | 22 hr |
| Mar 7, 12:49 PM EST | Coastal Flood Warning | GYX | 16 hr |
| Mar 8, 2:31 AM EST | Special Weather Statement | GYX | 89 min |
| Mar 11, 3:49 AM EDT | Winter Storm Watch | GYX | 24 hr |
| Mar 12, 3:41 AM EDT | Winter Storm Warning | GYX | 66 hr |
| Mar 12, 2:44 PM EDT | Coastal Flood Advisory | GYX | 33 hr |
| Mar 13, 4:13 AM EDT | Blizzard Warning | GYX | 20 hr |
| Mar 13, 1:42 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Mar 13, 2:15 PM EDT | Special Weather Statement | GYX | 3 hr |
| Mar 13, 7:15 PM EDT | Special Weather Statement | GYX | 2 hr |
| Mar 13, 11:44 PM EDT | Winter Weather Advisory | GYX | 19 hr |
| Mar 14, 8:48 AM EDT | Coastal Flood Statement | GYX | 72 min |
| Mar 21, 4:02 AM EDT | Coastal Flood Advisory | GYX | 25 hr |
| Mar 21, 4:08 AM EDT | Winter Weather Advisory | GYX | 24 hr |
| Mar 22, 5:37 AM EDT | Coastal Flood Statement | GYX | 10 hr |
| Mar 26, 3:30 PM EDT | Coastal Flood Statement | GYX | 43 hr |
| Mar 28, 6:07 AM EDT | Special Weather Statement | GYX | 113 min |
| Mar 30, 3:45 AM EDT | Dense Fog Advisory | GYX | 6 hr |
| Apr 3, 3:27 AM EDT | Winter Weather Advisory | GYX | 30 hr |
| Apr 3, 4:10 PM EDT | Wind Advisory | GYX | 36 hr |
| Apr 11, 4:46 AM EDT | Dense Fog Advisory | GYX | 2 hr |
| Apr 14, 3:44 PM EDT | Winter Weather Advisory | GYX | 56 hr |
| Apr 15, 11:15 AM EDT | Wind Advisory | GYX | 39 hr |
| Apr 16, 11:56 AM EDT | Coastal Flood Statement | GYX | 64 min |
| Apr 16, 3:14 PM EDT | Coastal Flood Advisory | GYX | 11 hr |
| Apr 16, 5:14 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Apr 16, 8:27 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| May 1, 9:25 AM EDT | Beach Hazards Statement | GYX | 35 hr |
| May 3, 12:43 PM EDT | Special Weather Statement | GYX | 47 min |
| May 4, 12:52 PM EDT | Beach Hazards Statement | GYX | 31 hr |
| May 4, 7:54 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 8, 4:37 AM EDT | Dense Fog Advisory | GYX | 4 hr |
| May 8, 7:55 PM EDT | Dense Fog Advisory | GYX | 13 hr |
| May 9, 3:10 PM EDT | Dense Fog Advisory | GYX | 17 hr |
| May 11, 3:11 AM EDT | Frost Advisory | GYX | 28 hr |
| May 15, 1:58 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| May 15, 3:02 PM EDT | Special Weather Statement | GYX | 73 min |
| May 15, 5:10 PM EDT | Special Weather Statement | GYX | 50 min |
| May 18, 3:34 AM EDT | Frost Advisory | GYX | 27 hr |
| May 21, 6:23 AM EDT | Beach Hazards Statement | GYX | 14 hr |
| May 26, 1:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| May 31, 7:44 AM EDT | Beach Hazards Statement | GYX | 12 hr |
| Jun 1, 3:29 PM EDT | Beach Hazards Statement | GYX | 29 hr |
| Jun 7, 3:14 PM EDT | Beach Hazards Statement | GYX | 23 hr |
| Jun 8, 2:23 PM EDT | Beach Hazards Statement | GYX | 30 hr |
| Jun 9, 8:25 PM EDT | Beach Hazards Statement | GYX | 24 hr |
| Jun 13, 9:29 PM EDT | Coastal Flood Statement | GYX | 4 hr |
| Jun 14, 3:29 AM EDT | Coastal Flood Statement | GYX | 9 hr |
| Jun 14, 12:02 PM EDT | Coastal Flood Advisory | GYX | 13 hr |
| Jun 15, 1:47 PM EDT | Beach Hazards Statement | GYX | 30 hr |
| Jun 15, 1:47 PM EDT | Coastal Flood Advisory | GYX | 12 hr |
| Jun 17, 3:18 AM EDT | Beach Hazards Statement | GYX | 17 hr |
| Jun 17, 2:51 PM EDT | Heat Advisory | GYX | 27 hr |
| Jun 18, 8:28 AM EDT | Beach Hazards Statement | GYX | 11 hr |
| Jun 18, 2:49 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jun 18, 4:28 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Jun 18, 5:35 PM EDT | Severe Thunderstorm Warning | GYX | 40 min |
| Jun 18, 5:50 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Jun 18, 6:17 PM EDT | Severe Thunderstorm Warning | GYX | 43 min |
| Jun 18, 7:05 PM EDT | Severe Thunderstorm Warning | GYX | 25 min |
| Jun 18, 7:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jun 22, 3:25 AM EDT | Beach Hazards Statement | GYX | 17 hr |
| Jun 28, 2:58 PM EDT | Beach Hazards Statement | GYX | 29 hr |
| Jun 28, 10:22 PM EDT | Dense Fog Advisory | GYX | 8 hr |
| Jun 29, 8:42 PM EDT | Beach Hazards Statement | GYX | 23 hr |
| Jul 1, 2:37 PM EDT | Heat Advisory | GYX | 28 hr |
| Jul 2, 8:17 PM EDT | Heat Advisory | GYX | 23 hr |
| Jul 3, 3:30 PM EDT | Special Weather Statement | GYX | 45 min |
| Jul 4, 3:22 PM EDT | Heat Advisory | GYX | 29 hr |
| Jul 12, 2:38 PM EDT | Coastal Flood Statement | GYX | 9 hr |
| Jul 13, 6:53 PM EDT | Coastal Flood Statement | GYX | 6 hr |
| Jul 14, 3:07 PM EDT | Coastal Flood Statement | GYX | 12 hr |
| Jul 15, 2:18 PM EDT | Severe Thunderstorm Warning | GYX | 37 min |
| Jul 16, 12:37 AM EDT | Coastal Flood Statement | GYX | 2 hr |
| Jul 16, 4:21 AM EDT | Dense Fog Advisory | GYX | 6 hr |
| Jul 16, 3:26 PM EDT | Dense Fog Advisory | GYX | 18 hr |
| Jul 17, 2:58 AM EDT | Flash Flood Watch | GYX | 14 hr |
| Jul 17, 10:35 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Jul 17, 11:17 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 17, 12:06 PM EDT | Severe Thunderstorm Warning | GYX | 54 min |
| Jul 17, 12:25 PM EDT | Special Weather Statement | GYX | 35 min |
| Jul 17, 12:27 PM EDT | Severe Thunderstorm Warning | GYX | 48 min |
| Jul 17, 12:33 PM EDT | Areal Flood Advisory | GYX | 117 min |
| Jul 17, 3:15 PM EDT | Areal Flood Advisory | GYX | 2 hr |
| Jul 26, 2:59 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 26, 3:20 PM EDT | Areal Flood Advisory | GYX | 55 min |
| Jul 26, 3:25 PM EDT | Areal Flood Advisory | GYX | 65 min |
| Jul 27, 12:10 AM EDT | Dense Fog Advisory | GYX | 10 hr |
| Jul 27, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 27, 4:50 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 27, 5:31 PM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Jul 27, 5:51 PM EDT | Severe Thunderstorm Warning | GYX | 39 min |
| Jul 27, 7:06 PM EDT | Mesoscale Discussion | SPC | 54 min |
| Jul 28, 3:47 PM EDT | Special Weather Statement | GYX | 43 min |
| Jul 28, 3:55 PM EDT | Severe Thunderstorm Warning | GYX | 50 min |
| Jul 28, 5:31 PM EDT | Severe Thunderstorm Warning | GYX | 44 min |
| Jul 28, 5:58 PM EDT | Severe Thunderstorm Warning | GYX | 47 min |
| Jul 28, 6:36 PM EDT | Special Weather Statement | GYX | 24 min |
| Jul 28, 8:02 PM EDT | Areal Flood Advisory | GYX | 118 min |
| Jul 28, 8:34 PM EDT | Special Weather Statement | GYX | 41 min |
| Jul 28, 8:49 PM EDT | Special Weather Statement | GYX | 41 min |
| Jul 28, 11:05 PM EDT | Special Weather Statement | GYX | 40 min |
| Aug 3, 8:56 AM EDT | Heat Advisory | GYX | 10 hr |
| Aug 3, 11:45 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 3, 2:12 PM EDT | Special Weather Statement | GYX | 48 min |
| Aug 3, 4:07 PM EDT | Severe Thunderstorm Warning | GYX | 38 min |
| Aug 3, 5:24 PM EDT | Severe Thunderstorm Warning | GYX | 66 min |
| Aug 3, 5:40 PM EDT | Flash Flood Warning | GYX | 118 min |
| Aug 3, 5:48 PM EDT | Areal Flood Advisory | GYX | 3 hr |
| Aug 3, 5:48 PM EDT | Severe Thunderstorm Warning | GYX | 42 min |
| Aug 3, 5:59 PM EDT | Flash Flood Warning | GYX | 2 hr |
| Aug 5, 3:23 PM EDT | Heat Advisory | GYX | 51 hr |
| Aug 7, 1:03 PM EDT | Mesoscale Discussion | SPC | 117 min |
| Aug 7, 5:01 PM EDT | Severe Thunderstorm Warning | GYX | 59 min |
| Aug 10, 3:03 PM EDT | Coastal Flood Statement | GYX | 10 hr |
| Aug 11, 3:02 PM EDT | Coastal Flood Advisory | GYX | 11 hr |
| Aug 12, 2:59 PM EDT | Coastal Flood Statement | GYX | 14 hr |
| Aug 14, 4:08 PM EDT | Special Weather Statement | GYX | 37 min |
| Aug 14, 4:43 PM EDT | Special Weather Statement | GYX | 47 min |
| Aug 21, 6:01 AM EDT | Dense Fog Advisory | GYX | 3 hr |
| Aug 27, 2:59 AM EDT | Heat Advisory | GYX | 65 hr |
| Sep 2, 2:46 PM EDT | Heat Advisory | GYX | 29 hr |
| Sep 6, 12:09 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 6, 12:31 PM EDT | Special Weather Statement | GYX | 59 min |
| Sep 6, 1:17 PM EDT | Special Weather Statement | GYX | 58 min |
| Sep 8, 3:25 PM EDT | Coastal Flood Statement | GYX | 9 hr |
| Sep 9, 2:53 AM EDT | Coastal Flood Statement | GYX | 22 hr |
| Sep 10, 3:34 PM EDT | Coastal Flood Advisory | GYX | 10 hr |
| Sep 12, 2:55 PM EDT | High Surf Advisory | GYX | 38 hr |
| Sep 14, 3:14 AM EDT | Dense Fog Advisory | GYX | 3 hr |
| Sep 14, 3:02 PM EDT | Dense Fog Advisory | GYX | 18 hr |
| Sep 15, 3:07 PM EDT | Dense Fog Advisory | GYX | 18 hr |
| Sep 16, 3:52 PM EDT | Dense Fog Advisory | GYX | 16 hr |
| Sep 18, 9:34 AM EDT | Areal Flood Advisory | GYX | 3 hr |
| Sep 22, 3:33 AM EDT | Frost Advisory | GYX | 29 hr |
| Oct 5, 2:35 AM EDT | Frost Advisory | GYX | 25 hr |
| Oct 5, 2:40 AM EDT | High Surf Advisory | GYX | 43 hr |
| Oct 11, 3:54 AM EDT | Coastal Flood Statement | GYX | 11 hr |
| Oct 13, 3:05 AM EDT | Frost Advisory | GYX | 29 hr |
| Oct 13, 3:05 AM EDT | Freeze Warning | GYX | 29 hr |
| Oct 17, 3:03 PM EDT | Wind Advisory | GYX | 21 hr |
| Oct 17, 4:44 PM EDT | Special Weather Statement | GYX | 31 min |
| Oct 18, 3:24 PM EDT | Freeze Warning | GYX | 18 hr |
| Oct 23, 6:46 PM EDT | Special Weather Statement | GYX | 59 min |
| Oct 26, 3:10 PM EDT | Wind Advisory | GYX | 31 hr |
| Oct 29, 12:08 PM EDT | Special Weather Statement | GYX | 67 min |
| Oct 29, 12:40 PM EDT | Special Weather Statement | GYX | 50 min |
| Nov 1, 12:59 AM EDT | Coastal Flood Statement | GYX | 5 hr |
| Nov 2, 3:46 AM EDT | High Wind Watch | GYX | 24 hr |
| Nov 3, 12:11 AM EDT | Flood Watch | GYX | 11 hr |
| Nov 3, 3:55 AM EDT | High Wind Warning | GYX | 15 hr |
| Nov 3, 7:06 AM EDT | Areal Flood Advisory | GYX | 3 hr |
| Nov 8, 2:50 PM EST | Flood Watch | GYX | 36 hr |
| Nov 10, 2:57 AM EST | Wind Advisory | GYX | 28 hr |
| Nov 13, 3:02 PM EST | Wind Advisory | GYX | 6 hr |
| Nov 13, 9:17 PM EST | Wind Advisory | GYX | 17 hr |
| Nov 14, 3:00 PM EST | Winter Storm Watch | GYX | 12 hr |
| Nov 15, 3:27 AM EST | Winter Storm Warning | GYX | 35 hr |
| Nov 15, 3:27 AM EST | Winter Weather Advisory | GYX | 27 hr |
| Nov 15, 10:06 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 16, 3:56 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Nov 19, 3:24 PM EST | Winter Weather Advisory | GYX | 30 hr |
| Nov 21, 3:28 PM EST | Snow Squall Warning | GYX | 62 min |
| Nov 21, 3:50 PM EST | Snow Squall Warning | GYX | 55 min |
| Nov 24, 3:02 PM EST | Winter Weather Advisory | GYX | 27 hr |
| Nov 25, 11:49 AM EST | Coastal Flood Advisory | GYX | 2 hr |
| Nov 25, 3:26 PM EST | Winter Storm Watch | GYX | 20 hr |
| Nov 26, 3:46 AM EST | Coastal Flood Advisory | GYX | 11 hr |
| Nov 26, 11:05 AM EST | Winter Weather Advisory | GYX | 28 hr |
| Nov 26, 3:26 PM EST | Wind Advisory | GYX | 18 hr |
| Nov 27, 3:21 AM EST | Coastal Flood Advisory | GYX | 13 hr |
| Nov 27, 9:28 AM EST | Areal Flood Advisory | GYX | 2 hr |
| Nov 27, 1:14 PM EST | Coastal Flood Warning | GYX | 3 hr |
| Nov 28, 3:09 AM EST | Coastal Flood Advisory | GYX | 14 hr |
| Dec 1, 2:39 AM EST | Winter Weather Advisory | GYX | 35 hr |
| Dec 2, 3:30 PM EST | Dense Fog Advisory | GYX | 20 hr |
| Dec 16, 3:11 PM EST | Winter Weather Advisory | GYX | 24 hr |
| Dec 16, 9:24 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 16, 9:36 PM EST | Mesoscale Discussion | SPC | 4 hr |
| Dec 17, 2:03 AM EST | Mesoscale Discussion | SPC | 6 hr |
| Dec 19, 3:50 PM EST | Flood Watch | GYX | 65 hr |
| Dec 20, 2:38 AM EST | Winter Weather Advisory | GYX | 31 hr |
| Dec 20, 3:28 PM EST | Wind Advisory | GYX | 32 hr |
| Dec 21, 10:20 AM EST | Areal Flood Advisory | GYX | 55 min |
| Dec 21, 3:21 PM EST | Coastal Flood Advisory | GYX | 21 hr |
| Dec 22, 5:40 PM EST | Coastal Flood Statement | GYX | 5 hr |
| Dec 27, 3:30 AM EST | Winter Weather Advisory | GYX | 42 hr |
| Dec 28, 3:01 PM EST | Dense Fog Advisory | GYX | 16 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 archive20172019
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.