Alert archive / Pennsylvania / Allegheny County / 2011
Weather alerts in Allegheny County, Pennsylvania, May 2011
32 weather alerts in May 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 32
- Warnings
- 7
- Watches
- 6
- Advisories
- 2
- Busiest day
- May 18, 201111 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|
| May 4, 4:04 PM EDT | Frost Advisory | PBZ | 17 hr |
| May 6, 7:04 PM EDT | Special Weather Statement | PBZ | 56 min |
| May 10, 10:19 PM EDT | Severe Thunderstorm Warning | PBZ | 28 min |
| May 12, 4:59 PM EDT | Special Weather Statement | PBZ | 31 min |
| May 12, 5:32 PM EDT | Special Weather Statement | PBZ | 58 min |
| May 12, 7:45 PM EDT | Special Weather Statement | PBZ | 60 min |
| May 12, 8:42 PM EDT | Areal Flood Warning | PBZ | 3 hr |
| May 13, 1:19 PM EDT | Special Weather Statement | PBZ | 116 min |
| May 13, 2:52 PM EDT | Severe Thunderstorm Warning | PBZ | 38 min |
| May 13, 3:41 PM EDT | Special Weather Statement | PBZ | 49 min |
| May 13, 3:43 PM EDT | Special Weather Statement | PBZ | 47 min |
| May 13, 3:49 PM EDT | Areal Flood Warning | PBZ | 6 hr |
| May 13, 3:52 PM EDT | Flood Watch | PBZ | 6 hr |
| May 14, 4:10 AM EDT | Flash Flood Watch | PBZ | 20 hr |
| May 14, 6:49 PM EDT | Special Weather Statement | PBZ | 41 min |
| May 17, 10:02 PM EDT | River Flood Advisory | PBZ | 64 hr |
| May 18, 2:41 AM EDT | Flood Watch | PBZ | 16 hr |
| May 18, 7:25 AM EDT | Special Weather Statement | PBZ | 50 min |
| May 18, 11:55 AM EDT | Mesoscale Discussion | SPC | 65 min |
| May 18, 11:56 AM EDT | Special Weather Statement | PBZ | 49 min |
| May 18, 12:55 PM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
| May 18, 1:51 PM EDT | Special Weather Statement | PBZ | 54 min |
| May 18, 3:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| May 18, 4:34 PM EDT | Special Weather Statement | PBZ | 41 min |
| May 18, 4:38 PM EDT | Special Weather Statement | PBZ | 37 min |
| May 18, 6:01 PM EDT | Mesoscale Discussion | SPC | 89 min |
| May 23, 8:07 PM EDT | Mesoscale Discussion | SPC | 83 min |
| May 23, 8:31 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
| May 25, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | 63 min |
| May 26, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | 40 min |
| May 26, 4:53 PM EDT | Severe Thunderstorm Warning | PBZ | 52 min |
| May 26, 6:06 PM EDT | Severe Thunderstorm Watch | SPC | 6 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 | 5 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 4 |
| Special Weather Statement | 13 |
| Flooding | |
| Areal Flood Warning | 2 |
| Flash Flood Watch | 1 |
| Flood Watch | 2 |
| River Flood Advisory | 1 |
| Cold | |
| Frost Advisory | 1 |
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.