Alert archive / Pennsylvania / Delaware County / 2021

Weather alerts in Delaware County, Pennsylvania, September 2021

33 weather alerts in September 2021, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Alerts
33
Warnings
18
Watches
3
Advisories
4
Busiest day
September 1, 202113 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.

IssuedProductOfficeLasted
Sep 1, 4:01 AM EDTMesoscale DiscussionSPC119 min
Sep 1, 6:19 AM EDTAreal Flood AdvisoryPHI116 min
Sep 1, 6:49 AM EDTFlash Flood WarningPHI86 min
Sep 1, 12:40 PM EDTTornado WatchSPC9 hr
Sep 1, 2:53 PM EDTFlash Flood WarningPHI9 hr
Sep 1, 3:09 PM EDTMesoscale DiscussionSPC3 hr
Sep 1, 4:28 PM EDTMesoscale DiscussionSPC2 hr
Sep 1, 4:42 PM EDTFlash Flood Warning EmergencyConsiderable damage threatPHI6 hr
Sep 1, 5:13 PM EDTSevere Thunderstorm WarningPHI47 min
Sep 1, 5:15 PM EDTTornado WarningPHI30 min
Sep 1, 5:26 PM EDTFlash Flood WarningPHI9 hr
Sep 1, 6:38 PM EDTRiver Flood WarningPHI26 hr
Sep 1, 7:53 PM EDTRiver Flood WarningPHI13 hr
Sep 1, 11:38 PM EDTAreal Flood WarningPHI10 hr
Sep 2, 2:23 AM EDTAreal Flood WarningPHI9 hr
Sep 2, 6:05 AM EDTCoastal Flood WarningPHI6 hr
Sep 2, 6:44 PM EDTCoastal Flood AdvisoryPHI7 hr
Sep 7, 2:33 PM EDTFlash Flood WatchPHI37 hr
Sep 8, 10:42 PM EDTMesoscale DiscussionSPC2 hr
Sep 8, 11:35 PM EDTSpecial Weather StatementPHI40 min
Sep 9, 12:08 AM EDTSpecial Weather StatementPHI37 min
Sep 22, 3:24 AM EDTFlash Flood WatchPHI41 hr
Sep 23, 9:12 AM EDTCoastal Flood AdvisoryPHI10 hr
Sep 23, 10:30 AM EDTMesoscale DiscussionSPC2 hr
Sep 23, 11:33 AM EDTAreal Flood AdvisoryPHI3 hr
Sep 23, 11:57 AM EDTFlash Flood WarningPHI3 hr
Sep 23, 12:12 PM EDTSevere Thunderstorm WarningPHI48 min
Sep 23, 12:28 PM EDTFlash Flood WarningPHI4 hr
Sep 23, 1:13 PM EDTSevere Thunderstorm WarningPHI47 min
Sep 23, 1:42 PM EDTFlash Flood WarningPHI4 hr
Sep 23, 4:26 PM EDTAreal Flood WarningPHI80 min
Sep 28, 7:14 PM EDTSpecial Weather StatementPHI46 min
Sep 28, 7:29 PM EDTSevere Thunderstorm WarningPHI31 min

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.