Alert archive / Pennsylvania / Montgomery County / 2011
Weather alerts in Montgomery County, Pennsylvania, September 2011
44 weather alerts in September 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 44
- Warnings
- 22
- Watches
- 0
- Advisories
- 8
- Busiest day
- September 7, 20119 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 |
|---|---|---|---|
| Sep 5, 6:03 PM EDT | Special Weather Statement | PHI | 117 min |
| Sep 5, 8:19 PM EDT | Areal Flood Advisory | PHI | 116 min |
| Sep 5, 9:32 PM EDT | Areal Flood Warning | PHI | 9 hr |
| Sep 5, 10:53 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 6, 1:42 AM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 6, 5:43 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 6, 6:32 PM EDT | Areal Flood Warning | PHI | 26 hr |
| Sep 6, 6:38 PM EDT | Areal Flood Warning | PHI | 23 hr |
| Sep 6, 11:13 PM EDT | River Flood Warning | PHI | 3 days |
| Sep 6, 11:19 PM EDT | River Flood Warning | PHI | 17 hr |
| Sep 7, 3:40 AM EDT | River Flood Warning | PHI | 54 hr |
| Sep 7, 4:26 AM EDT | River Flood Warning | PHI | 6 hr |
| Sep 7, 4:26 AM EDT | River Flood Warning | PHI | 3 days |
| Sep 7, 3:36 PM EDT | Mesoscale Discussion | SPC | 84 min |
| Sep 7, 4:06 PM EDT | River Flood Warning | PHI | 41 hr |
| Sep 7, 4:09 PM EDT | Special Weather Statement | PHI | 66 min |
| Sep 7, 5:10 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 7, 8:24 PM EDT | Areal Flood Warning | PHI | 6 hr |
| Sep 7, 9:38 PM EDT | River Flood Warning | PHI | 13 hr |
| Sep 8, 1:25 AM EDT | Flash Flood Warning | PHI | 7 hr |
| Sep 8, 2:26 AM EDT | Flash Flood Warning | PHI | 6 hr |
| Sep 8, 8:36 AM EDT | Areal Flood Warning | PHI | 16 hr |
| Sep 8, 9:32 AM EDT | Areal Flood Warning | PHI | 15 hr |
| Sep 11, 6:38 PM EDT | Mesoscale Discussion | SPC | 97 min |
| Sep 11, 9:14 PM EDT | Flash Flood Warning | PHI | 110 min |
| Sep 11, 9:14 PM EDT | Special Weather Statement | PHI | 61 min |
| Sep 11, 9:54 PM EDT | Severe Thunderstorm Warning | PHI | 51 min |
| Sep 11, 9:56 PM EDT | Flash Flood Warning | PHI | 4 hr |
| Sep 11, 10:52 PM EDT | Special Weather Statement | PHI | 83 min |
| Sep 23, 10:52 AM EDT | Areal Flood Advisory | PHI | 5 hr |
| Sep 23, 5:27 PM EDT | Areal Flood Warning | PHI | 12 hr |
| Sep 23, 8:29 PM EDT | Special Weather Statement | PHI | 31 min |
| Sep 24, 4:13 AM EDT | River Flood Warning | PHI | 7 hr |
| Sep 24, 5:29 AM EDT | Areal Flood Warning | PHI | 5 hr |
| Sep 28, 1:54 AM EDT | Special Weather Statement | PHI | 51 min |
| Sep 28, 5:45 AM EDT | Special Weather Statement | PHI | 60 min |
| Sep 28, 3:20 PM EDT | Special Weather Statement | PHI | 55 min |
| Sep 28, 3:59 PM EDT | Special Weather Statement | PHI | 61 min |
| Sep 28, 4:33 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Sep 28, 4:45 PM EDT | Mesoscale Discussion | SPC | 60 min |
| Sep 28, 5:42 PM EDT | Areal Flood Advisory | PHI | 3 hr |
| Sep 28, 8:38 PM EDT | Areal Flood Warning | PHI | 8 hr |
| Sep 29, 12:35 PM EDT | Special Weather Statement | PHI | 55 min |
| Sep 29, 1:24 PM EDT | Special Weather Statement | PHI | 66 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 | 1 |
| Mesoscale Discussion | 3 |
| Special Weather Statement | 11 |
| Flooding | |
| Areal Flood Warning | 9 |
| Flash Flood Warning | 4 |
| River Flood Warning | 8 |
| Areal Flood Advisory | 8 |
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.