Alert archive / Pennsylvania / Westmoreland County
Weather alerts in Westmoreland County, Pennsylvania, 2021
228 weather alerts in 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Westmoreland County and its neighbors
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Alerts
- 228
- Warnings
- 106
- Watches
- 26
- Advisories
- 46
- Busiest month
- August59 alerts
- Busiest day
- June 21, 202122 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 Westmoreland County in 2021 had a tornado report inside them.
Westmoreland County, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 2 | 2 | 0% | 0 | ||
| Severe thunderstorm warnings | 69 | 56 | 19% | 75 | 81% | 22 min |
| Flash flood warnings | 13 | 11 | 15% | 27 | 85% | 80 min |
Each office's whole area, 2021
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Pittsburgh, PA: tornado warnings | 27 | 15 | 44% | 35 | 69% | 7 min |
| NWS Pittsburgh, PA: severe thunderstorm warnings | 319 | 228 | 29% | 637 | 78% | 17 min |
| NWS Pittsburgh, PA: flash flood warnings | 44 | 35 | 20% | 176 | 84% | 77 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, 12:55 PM EST | Winter Weather Advisory | PBZ | 5 hr |
| Jan 2, 3:35 PM EST | Winter Weather Advisory | PBZ | 21 hr |
| Jan 16, 3:19 AM EST | Winter Weather Advisory | PBZ | 28 hr |
| Jan 16, 11:03 PM EST | Special Weather Statement | PBZ | 57 min |
| Jan 19, 2:37 AM EST | Winter Weather Advisory | PBZ | 34 hr |
| Jan 24, 3:43 AM EST | Winter Storm Watch | PBZ | 24 hr |
| Jan 25, 3:47 AM EST | Winter Storm Warning | PBZ | 30 hr |
| Jan 30, 3:42 AM EST | Winter Weather Advisory | PBZ | 71 hr |
| Jan 31, 4:42 PM EST | Winter Storm Warning | PBZ | 41 hr |
| Feb 2, 6:45 PM EST | Winter Weather Advisory | PBZ | 9 hr |
| Feb 4, 10:13 PM EST | Special Weather Statement | PBZ | 62 min |
| Feb 8, 1:45 PM EST | Winter Weather Advisory | PBZ | 21 hr |
| Feb 10, 3:31 AM EST | Winter Weather Advisory | PBZ | 29 hr |
| Feb 13, 8:11 AM EST | Winter Weather Advisory | PBZ | 24 hr |
| Feb 13, 1:55 PM EST | Winter Storm Watch | PBZ | 24 hr |
| Feb 14, 1:49 PM EST | Winter Storm Warning | PBZ | 40 hr |
| Feb 15, 2:44 PM EST | Mesoscale Discussion | SPC | 6 hr |
| Feb 15, 9:16 PM EST | Mesoscale Discussion | SPC | 5 hr |
| Feb 16, 11:55 AM EST | Winter Storm Watch | PBZ | 25 hr |
| Feb 17, 1:21 PM EST | Winter Weather Advisory | PBZ | 36 hr |
| Feb 21, 3:30 PM EST | Winter Weather Advisory | PBZ | 20 hr |
| Feb 22, 7:04 AM EST | Special Weather Statement | PBZ | 86 min |
| Feb 26, 11:25 AM EST | River Flood Watch | PBZ | 3 days |
| Feb 27, 11:00 AM EST | River Flood Warning | PBZ | 3 days |
| Feb 27, 11:00 AM EST | River Flood Warning | PBZ | 3 days |
| Mar 1, 5:27 AM EST | Areal Flood Advisory | PBZ | 8 hr |
| Mar 1, 12:16 PM EST | Wind Advisory | PBZ | 7 hr |
| Mar 1, 2:40 PM EST | River Flood Warning | PBZ | 10 hr |
| Mar 15, 2:41 PM EDT | Winter Weather Advisory | PBZ | 19 hr |
| Mar 18, 7:23 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Mar 24, 1:03 PM EDT | High Wind Watch | PBZ | 24 hr |
| Mar 25, 1:12 PM EDT | High Wind Warning | PBZ | 27 hr |
| Mar 25, 1:12 PM EDT | Wind Advisory | PBZ | 27 hr |
| Mar 25, 5:03 PM EDT | Special Weather Statement | PBZ | 57 min |
| Apr 20, 7:01 AM EDT | Freeze Watch | PBZ | 19 hr |
| Apr 21, 2:04 AM EDT | Freeze Warning | PBZ | 32 hr |
| Apr 21, 1:25 PM EDT | Freeze Watch | PBZ | 13 hr |
| Apr 22, 2:39 AM EDT | Freeze Warning | PBZ | 30 hr |
| Apr 25, 4:33 PM EDT | Freeze Warning | PBZ | 15 hr |
| Apr 30, 12:59 AM EDT | Freeze Watch | PBZ | 12 hr |
| Apr 30, 12:59 AM EDT | Wind Advisory | PBZ | 20 hr |
| Apr 30, 12:59 PM EDT | Frost Advisory | PBZ | 20 hr |
| Apr 30, 12:59 PM EDT | Freeze Warning | PBZ | 20 hr |
| May 11, 11:52 AM EDT | Frost Advisory | PBZ | 19 hr |
| May 12, 11:40 AM EDT | Frost Advisory | PBZ | 20 hr |
| May 24, 8:06 AM EDT | Special Weather Statement | PBZ | 39 min |
| May 24, 10:27 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| May 26, 11:55 AM EDT | Special Weather Statement | PBZ | 35 min |
| May 26, 12:14 PM EDT | Special Weather Statement | PBZ | 31 min |
| May 26, 12:16 PM EDT | Mesoscale Discussion | SPC | 119 min |
| May 26, 12:34 PM EDT | Special Weather Statement | PBZ | 26 min |
| May 26, 12:59 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 26, 4:21 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| May 26, 6:06 PM EDT | Special Weather Statement | PBZ | 24 min |
| May 26, 6:17 PM EDT | Severe Thunderstorm Warning | PBZ | 12 min |
| Jun 10, 3:07 PM EDT | Areal Flood Advisory | PBZ | 99 min |
| Jun 10, 4:05 PM EDT | Areal Flood Advisory | PBZ | 64 min |
| Jun 13, 8:24 AM EDT | Special Weather Statement | PBZ | 36 min |
| Jun 13, 8:36 AM EDT | Areal Flood Advisory | PBZ | 71 min |
| Jun 13, 9:02 AM EDT | Special Weather Statement | PBZ | 13 min |
| Jun 13, 12:13 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 12:50 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 13, 3:26 PM EDT | Mesoscale Discussion | SPC | 94 min |
| Jun 13, 5:29 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 13, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Jun 13, 5:43 PM EDT | Severe Thunderstorm Warning | PBZ | 47 min |
| Jun 13, 5:59 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Jun 13, 6:54 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jun 14, 11:31 AM EDT | Mesoscale Discussion | SPC | 89 min |
| Jun 14, 11:46 AM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 14, 3:05 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Jun 14, 3:25 PM EDT | Mesoscale Discussion | SPC | 95 min |
| Jun 14, 3:29 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jun 14, 3:40 PM EDT | Areal Flood Advisory | PBZ | 91 min |
| Jun 14, 3:52 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jun 14, 3:55 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jun 19, 5:11 AM EDT | Special Weather Statement | PBZ | 34 min |
| Jun 21, 11:59 AM EDT | Mesoscale Discussion | SPC | 91 min |
| Jun 21, 12:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 21, 2:55 PM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Jun 21, 3:21 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jun 21, 3:25 PM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Jun 21, 3:37 PM EDT | Severe Thunderstorm Warning | PBZ | 23 min |
| Jun 21, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jun 21, 3:47 PM EDT | Mesoscale Discussion | SPC | 58 min |
| Jun 21, 3:53 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jun 21, 3:55 PM EDT | Areal Flood Advisory | PBZ | 111 min |
| Jun 21, 3:55 PM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Jun 21, 4:05 PM EDT | Severe Thunderstorm Warning | PBZ | 25 min |
| Jun 21, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jun 21, 4:18 PM EDT | Severe Thunderstorm Warning | PBZ | 27 min |
| Jun 21, 4:27 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Jun 21, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jun 21, 4:41 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Jun 21, 4:43 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jun 21, 5:08 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 21, 6:39 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Jun 21, 7:23 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 21, 7:46 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 21, 8:40 PM EDT | Areal Flood Warning | PBZ | 2 hr |
| Jun 21, 10:44 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Jun 30, 11:30 AM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 30, 11:47 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 1:06 PM EDT | Severe Thunderstorm Warning | PBZ | 24 min |
| Jun 30, 1:19 PM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jun 30, 1:23 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| Jun 30, 2:03 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Jun 30, 2:12 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Jun 30, 2:45 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jun 30, 3:29 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 1, 8:46 AM EDT | Areal Flood Advisory | PBZ | 3 hr |
| Jul 7, 2:10 PM EDT | Special Weather Statement | PBZ | 20 min |
| Jul 7, 3:19 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Jul 7, 3:26 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| Jul 7, 3:31 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 7, 3:45 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Jul 7, 4:40 PM EDT | Severe Thunderstorm Warning | PBZ | 13 min |
| Jul 7, 5:24 PM EDT | Areal Flood Advisory | PBZ | 111 min |
| Jul 7, 8:24 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Jul 7, 8:41 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Jul 11, 2:05 PM EDT | Mesoscale Discussion | SPC | 55 min |
| Jul 11, 2:40 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 11, 5:11 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Jul 13, 4:06 AM EDT | Special Weather Statement | PBZ | 24 min |
| Jul 13, 4:10 AM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Jul 13, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 13, 4:07 PM EDT | Mesoscale Discussion | SPC | 113 min |
| Jul 13, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| Jul 13, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | 50 min |
| Jul 13, 5:47 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Jul 13, 6:08 PM EDT | Severe Thunderstorm Warning | PBZ | 37 min |
| Jul 13, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Jul 13, 6:43 PM EDT | Severe Thunderstorm Warning | PBZ | 32 min |
| Jul 16, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | 51 min |
| Jul 16, 3:42 PM EDT | Severe Thunderstorm Warning | PBZ | 33 min |
| Jul 16, 4:19 PM EDT | Special Weather Statement | PBZ | 26 min |
| Jul 16, 6:20 PM EDT | Special Weather Statement | PBZ | 25 min |
| Jul 17, 2:30 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 17, 4:01 PM EDT | Areal Flood Advisory | PBZ | 92 min |
| Jul 17, 4:30 PM EDT | Severe Thunderstorm Warning | PBZ | 45 min |
| Jul 28, 3:47 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Jul 28, 4:32 PM EDT | Special Weather Statement | PBZ | 28 min |
| Jul 29, 1:58 PM EDT | Tornado Warning | PBZ | 22 min |
| Jul 29, 3:13 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Aug 4, 4:03 PM EDT | Special Weather Statement | PBZ | 27 min |
| Aug 7, 5:34 PM EDT | Areal Flood Advisory | PBZ | 31 min |
| Aug 8, 5:00 PM EDT | Severe Thunderstorm Warning | PBZ | 30 min |
| Aug 10, 12:12 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 10, 2:03 PM EDT | Severe Thunderstorm Warning | PBZ | 42 min |
| Aug 10, 2:51 PM EDT | Special Weather Statement | PBZ | 39 min |
| Aug 11, 11:50 AM EDT | Mesoscale Discussion | SPC | 115 min |
| Aug 11, 12:54 PM EDT | Severe Thunderstorm Warning | PBZ | 36 min |
| Aug 11, 1:17 PM EDT | Severe Thunderstorm Warning | PBZ | 43 min |
| Aug 11, 1:41 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Aug 11, 2:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 11, 2:04 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Aug 11, 2:11 PM EDT | Severe Thunderstorm Warning | PBZ | 34 min |
| Aug 11, 2:30 PM EDT | Special Weather Statement | PBZ | 30 min |
| Aug 11, 2:47 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Aug 11, 3:25 PM EDT | Severe Thunderstorm Warning | PBZ | 35 min |
| Aug 11, 3:34 PM EDT | Severe Thunderstorm Warning | PBZ | 26 min |
| Aug 11, 3:59 PM EDT | Special Weather Statement | PBZ | 31 min |
| Aug 12, 3:15 AM EDT | Heat Advisory | PBZ | 16 hr |
| Aug 12, 12:19 PM EDT | Mesoscale Discussion | SPC | 116 min |
| Aug 12, 12:21 PM EDT | Severe Thunderstorm Warning | PBZ | 39 min |
| Aug 12, 12:34 PM EDT | Severe Thunderstorm Warning | PBZ | 41 min |
| Aug 12, 12:56 PM EDT | Severe Thunderstorm Warning | PBZ | 49 min |
| Aug 12, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Aug 12, 3:48 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 12, 6:22 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 12, 6:38 PM EDT | Severe Thunderstorm Warning | PBZ | 67 min |
| Aug 12, 7:09 PM EDT | Severe Thunderstorm Warning | PBZ | 81 min |
| Aug 12, 7:31 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 12, 8:36 PM EDT | Flash Flood Warning | PBZ | 3 hr |
| Aug 12, 8:58 PM EDT | Severe Thunderstorm Warning | PBZ | 41 min |
| Aug 12, 9:57 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| Aug 12, 10:32 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| Aug 13, 12:17 AM EDT | Areal Flood Warning | PBZ | 57 min |
| Aug 13, 4:46 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 13, 6:50 PM EDT | Special Weather Statement | PBZ | 25 min |
| Aug 13, 7:02 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| Aug 13, 7:29 PM EDT | Severe Thunderstorm Warning | PBZ | 46 min |
| Aug 13, 7:37 PM EDT | Severe Thunderstorm Warning | PBZ | 53 min |
| Aug 13, 7:42 PM EDT | Severe Thunderstorm Warning | PBZ | 48 min |
| Aug 13, 7:49 PM EDT | Mesoscale Discussion | SPC | 56 min |
| Aug 13, 8:11 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Aug 17, 1:28 PM EDT | Flash Flood Watch | PBZ | 27 hr |
| Aug 18, 9:25 AM EDT | Areal Flood Advisory | PBZ | 5 hr |
| Aug 18, 2:56 PM EDT | Areal Flood Advisory | PBZ | 109 min |
| Aug 28, 1:50 PM EDT | Areal Flood Advisory | PBZ | 115 min |
| Aug 29, 1:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| Aug 29, 4:59 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Aug 29, 5:14 PM EDT | Severe Thunderstorm Warning | PBZ | 31 min |
| Aug 30, 4:33 AM EDT | Flash Flood Watch | PBZ | 57 hr |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | 4 days |
| Aug 30, 11:19 AM EDT | River Flood Watch | PBZ | 3 days |
| Aug 31, 12:25 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Aug 31, 12:43 PM EDT | River Flood Watch | PBZ | 62 hr |
| Aug 31, 1:14 PM EDT | Flash Flood Warning | PBZ | 76 min |
| Aug 31, 1:22 PM EDT | Flash Flood Warning | PBZ | 2 hr |
| Aug 31, 2:41 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Aug 31, 3:55 PM EDT | Areal Flood Advisory | PBZ | 2 hr |
| Aug 31, 5:52 PM EDT | Flash Flood Warning | PBZ | 113 min |
| Sep 1, 5:05 AM EDT | Areal Flood Advisory | PBZ | 104 min |
| Sep 1, 6:23 AM EDT | Flash Flood Warning | PBZ | 5 hr |
| Sep 1, 7:16 AM EDT | Flash Flood Warning | PBZ | 6 hr |
| Sep 1, 9:27 AM EDT | Flash Flood Warning | PBZ | 4 hr |
| Sep 1, 11:23 AM EDT | Areal Flood Advisory | PBZ | 52 min |
| Sep 1, 11:30 AM EDT | River Flood Warning | PBZ | 16 hr |
| Sep 1, 11:30 AM EDT | River Flood Warning | PBZ | 28 hr |
| Sep 1, 11:30 AM EDT | River Flood Warning | PBZ | 40 hr |
| Sep 1, 11:30 AM EDT | River Flood Warning | PBZ | 33 hr |
| Sep 1, 1:16 PM EDT | Areal Flood Warning | PBZ | 2 hr |
| Sep 1, 1:24 PM EDT | Areal Flood Warning | PBZ | 2 hr |
| Sep 9, 6:28 AM EDT | Special Weather Statement | PBZ | 2 hr |
| Sep 22, 1:08 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Sep 22, 2:23 PM EDT | Tornado Watch | SPC | 6 hr |
| Sep 22, 4:08 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 22, 6:13 PM EDT | Mesoscale Discussion | SPC | 92 min |
| Sep 28, 3:31 AM EDT | Special Weather Statement | PBZ | 29 min |
| Sep 28, 3:38 AM EDT | Special Weather Statement | PBZ | 37 min |
| Sep 28, 7:09 AM EDT | Special Weather Statement | PBZ | 36 min |
| Oct 21, 7:40 PM EDT | Tornado Warning | PBZ | 20 min |
| Oct 21, 7:56 PM EDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 21, 9:15 PM EDT | Severe Thunderstorm Warning | PBZ | 15 min |
| Oct 28, 11:38 AM EDT | Wind Advisory | PBZ | 30 hr |
| Dec 10, 11:02 AM EST | Wind Advisory | PBZ | 34 hr |
| Dec 26, 5:43 PM EST | Winter Weather Advisory | PBZ | 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 archive20202022
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.