Alert archive / Pennsylvania / River Flood Warnings in 2020
River Flood Warning 38, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Nov 30, 2020, 3:51 PM EST for Chester County, Pennsylvania. It was in force for 14 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 30, 2020, 3:51 PM EST (20:51 UTC)
- Expired
- Dec 1, 2020, 6:02 AM EST
- In force
- 14 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- Minor
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 108 km from the middle of the area, began a volume at 20:50 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point East Branch Brandywine Creek below Downingtown (DWNP1). The gauge peaked at 8.96 ft at Nov 30, 2020, 8:00 PM EST.
- Action stage
- 6 ft
- Minor stage
- 7 ft
- Moderate stage
- 9 ft
- Major stage
- 11 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 01480870, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The text
As transmitted.
174 WGUS41 KPHI 302051 FLWPHI BULLETIN - EAS ACTIVATION REQUESTED Flood Warning National Weather Service Mount Holly NJ 351 PM EST Mon Nov 30 2020 ...The National Weather Service in Mount Holly NJ has issued a Flood Warning for the following rivers in Pennsylvania... East Branch Brandywine Creek Below Downingtown affecting Chester County. For the Brandywine Creek...including Downingtown, Chadds Ford, Wilmington...Minor flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Warning means that flooding is imminent or occurring. All interested parties should take necessary precautions immediately. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. PAC029-010345- /O.NEW.KPHI.FL.W.0038.201130T2051Z-201201T0331Z/ /DWNP1.1.ER.201130T2021Z.201201T0200Z.201201T1030Z.NO/ 351 PM EST Mon Nov 30 2020 The National Weather Service in Mount Holly has issued a * Flood Warning for the East Branch Brandywine Creek Below Downingtown. * From this afternoon to this evening. * At 3:31 PM EST Monday the stage was 7.1 feet. * Flood stage is 7.0 feet. * Minor flooding is occurring and minor flooding is forecast. * Recent Activity...The maximum river stage in the 24 hours ending at 3:31 PM EST Monday was 7.1 feet. * Forecast...The river will fall below flood stage late tonight to 6.9 feet and then begin rising late this afternoon. It will then rise above flood stage late this afternoon to 8.8 feet late this evening. It will fall below flood stage again late tonight. * Impact at 6.0 feet...Open adjacent land next to the creek floods. Impact at 8.0 feet...Dowlin Forge Road begins to flood. Impact at 9.0 feet...High water on the Brandywine sends backwater up Beaver Creek. Beaver Creek floods inundating parks and the Downingtown Little League fields. * Flood History...This crest compares to a previous crest of 9.2 feet on 10/23/2003. && Stream Fld Observed Fcsts (4 pm) Crest Location Stg Stg Day/Time Tue Wed Stg Time Date East Branch Bran Downingtown 7.0 7.1 Mon 3 pm 5.1 MSG 8.8 9pm 11/30 && LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574 $$ PO
2 follow-up statements
012 WGUS41 KPHI 010109 FLWPHI BULLETIN - EAS ACTIVATION REQUESTED Flood Warning National Weather Service Mount Holly NJ 809 PM EST Mon Nov 30 2020 ...Forecast flooding changed from Minor to Moderate severity and increased in duration for the following rivers in Pennsylvania... East Branch Brandywine Creek Below Downingtown affecting Chester County. For the Brandywine Creek...including Downingtown...Moderate flooding is forecast. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should not attempt to drive around barricades or drive cars through flooded areas. A Flood Warning means that flooding is imminent or occurring. All interested parties should take necessary precautions immediately. Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov/phi. PAC029-011315- /O.EXT.KPHI.FL.W.0038.000000T0000Z-201201T1543Z/ /DWNP1.2.ER.201130T2021Z.201201T0200Z.201201T0943Z.NO/ 809 PM EST Mon Nov 30 2020 ...Forecast flooding increased from Minor to Moderate severity and increased in duration until late tomorrow morning... The Flood Warning continues for the East Branch Brandywine Creek Below Downingtown. * Until Tuesday morning. * At 7:45 PM EST Monday the stage was 9.0 feet. * Flood stage is 7.0 feet. * Moderate flooding is occurring and moderate flooding is forecast. * Recent Activity...The maximum river stage in the 24 hours ending at 7:45 PM EST Monday was 9.0 feet. * Forecast...The river is expected to fall below flood stage late tonight and continue falling to 5.1 feet early Wednesday morning. * Impact at 6.0 feet...Open adjacent land next to the creek floods. Impact at 8.0 feet...Dowlin Forge Road begins to flood. Impact at 9.0 feet...High water on the Brandywine sends backwater up Beaver Creek. Beaver Creek floods inundating parks and the Downingtown Little League fields. * Flood History...This crest compares to a previous crest of 9.2 feet on 10/23/2003. && Stream Fld Observed Fcsts (8 pm) Crest Location Stg Stg Day/Time Tue Stg Time Date East Branch Bran Downingtown 7.0 9.0 Mon 7 pm 5.1 9.2 9pm 11/30 && LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574 $$ PO
905 WGUS81 KPHI 010226 FLSPHI Flood Statement National Weather Service Mount Holly NJ 926 PM EST Mon Nov 30 2020 ...The Flood Warning continues for the East Branch Brandywine Creek below Downingtown... PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should not attempt to drive around barricades or through flooded areas. Additional information is available at www.weather.gov/phi. PAC029-011115- /O.EXT.KPHI.FL.W.0038.000000T0000Z-201201T1102Z/ /DWNP1.1.ER.201130T2021Z.201201T0045Z.201201T0502Z.NO/ 926 PM EST Mon Nov 30 2020 ...The Flood Warning is now in effect until tomorrow morning... The Flood Warning continues for the East Branch Brandywine Creek Below Downingtown. * Until Tuesday morning. * At 8:45 PM EST Monday the stage was 8.8 feet. * Flood stage is 7.0 feet. * Minor flooding is occurring and is forecast to continue. * Forecast...The river is expected to fall below flood stage just after midnight. * Impact at 8.0 feet...Dowlin Forge Road floods. && Stream Fld Observed Fcsts (9 pm) Crest Location Stg Stg Day/Time Tue Wed Stg Time Date East Branch Bran Downingtown 7.0 8.8 Mon 8 pm 3.3 MSG Crested && LAT...LON 4002 7567 3993 7561 3991 7567 4001 7574 $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 30, 12:15 PM EST | Areal Flood Advisory | PHI | Chester, Delaware | 3 hr |
| Nov 30, 12:41 PM EST | Special Weather Statement | PHI | Chester, Montgomery | 49 min |
| Nov 30, 2:17 PM EST | Areal Flood Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 9 hr |
| Nov 30, 2:18 PM EST | Coastal Flood Advisory | PHI | Bucks, Delaware, Philadelphia | 2 hr |
| Nov 30, 2:41 PM EST | Severe Thunderstorm Warning | PHI | Chester, Delaware | 49 min |
| Nov 30, 2:48 PM EST | Areal Flood Warning | PHI | Chester, Delaware, Montgomery | 8 hr |
| Nov 30, 3:01 PM EST | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 44 min |
| Nov 30, 3:26 PM EST | Areal Flood Warning | PHI | Berks, Bucks, Carbon, Lehigh, Monroe, Northampton | 4 hr |
| Nov 30, 3:43 PM EST | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Monroe, Montgomery, Northampton and 1 more | 47 min |
| Nov 30, 3:53 PM EST | Areal Flood Warning | PHI | Monroe, Northampton | 16 hr |
| Nov 30, 3:53 PM EST | Tornado Warning | PHI | Bucks, Montgomery | 13 min |
| Nov 30, 4:17 PM EST | Areal Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 10 hr |
| Nov 30, 5:30 PM EST | River Flood Warning | PHI | Chester, Delaware | 16 hr |
| Nov 30, 5:33 PM EST | River Flood Warning | PHI | Montgomery | 10 hr |
| Nov 30, 5:35 PM EST | River Flood Warning | PHI | Delaware | 4 hr |
Nearby
River Flood Warnings in Pennsylvania, 2020Every river flood warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.