Alert archive / Pennsylvania / Delaware County / 2021
Weather alerts in Delaware County, Pennsylvania, August 2021
32 weather alerts in August 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 32
- Warnings
- 12
- Watches
- 5
- Advisories
- 7
- Busiest day
- August 11, 202110 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 |
|---|---|---|---|
| Aug 9, 3:43 PM EDT | Excessive Heat Watch | PHI | 12 hr |
| Aug 9, 4:36 PM EDT | Areal Flood Advisory | PHI | 104 min |
| Aug 9, 5:12 PM EDT | Areal Flood Advisory | PHI | 85 min |
| Aug 10, 3:33 AM EDT | Excessive Heat Warning | PHI | 4 days |
| Aug 10, 2:30 PM EDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 10, 8:02 PM EDT | Severe Thunderstorm Warning | PHI | 43 min |
| Aug 10, 8:18 PM EDT | Severe Thunderstorm Warning | PHI | 42 min |
| Aug 10, 8:36 PM EDT | Severe Thunderstorm Warning | PHI | 39 min |
| Aug 10, 8:43 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Aug 11, 2:03 PM EDT | Mesoscale Discussion | SPC | 87 min |
| Aug 11, 3:02 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 11, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Aug 11, 6:44 PM EDT | Mesoscale Discussion | SPC | 91 min |
| Aug 11, 7:04 PM EDT | Areal Flood Advisory | PHI | 2 hr |
| Aug 11, 7:11 PM EDT | Severe Thunderstorm Warning | PHI | 49 min |
| Aug 12, 10:08 PM EDT | Mesoscale Discussion | SPC | 67 min |
| Aug 19, 12:04 AM EDT | Special Weather Statement | PHI | 71 min |
| Aug 19, 12:31 AM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 19, 12:44 AM EDT | Mesoscale Discussion | SPC | 61 min |
| Aug 19, 12:47 AM EDT | Tornado Warning | PHI | 28 min |
| Aug 19, 1:14 AM EDT | Special Weather Statement | PHI | 91 min |
| Aug 19, 1:30 AM EDT | Flash Flood Warning | PHI | 4 hr |
| Aug 19, 4:33 AM EDT | Areal Flood Warning | PHI | 4 hr |
| Aug 19, 10:40 AM EDT | Areal Flood Warning | PHI | 3 hr |
| Aug 21, 3:27 AM EDT | Flood Watch | PHI | 53 hr |
| Aug 25, 2:13 PM EDT | Heat Advisory | PHI | 53 hr |
| Aug 26, 3:30 PM EDT | Flash Flood Watch | PHI | 48 hr |
| Aug 27, 1:33 PM EDT | Areal Flood Advisory | PHI | 83 min |
| Aug 27, 3:44 PM EDT | Special Weather Statement | PHI | 31 min |
| Aug 28, 3:06 AM EDT | Areal Flood Advisory | PHI | 2 hr |
| Aug 28, 11:57 AM EDT | Flash Flood Warning | PHI | 3 hr |
| Aug 30, 5:00 AM EDT | Flash Flood Watch | PHI | 71 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
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. Rebuilt daily.