Alert archive / Pennsylvania / River Flood Warnings in 2011
River Flood Warning 207, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this river flood warning at Nov 23, 2011, 6:34 AM EST for Chester County, Pennsylvania. It took effect at Nov 23, 2011, 6:58 AM EST. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Nov 23, 2011, 6:34 AM EST (11:34 UTC)
- In effect from
- Nov 23, 2011, 6:58 AM EST
- Expired
- Nov 23, 2011, 1:57 PM EST
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- Minor
County Chester County, PA
The radar
The Philadelphia radar (KDIX), 114 km from the middle of the area, began a volume at 11:35 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 9.51 ft at Nov 23, 2011, 9:00 AM 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, in the capitals the NWS used until 2016.
636
WGUS41 KPHI 231134
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
634 AM EST WED NOV 23 2011
...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
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE
WATER MAY BE DEEPER THAN YOU THINK.
&&
PAC029-231733-
/O.NEW.KPHI.FL.W.0207.111123T1211Z-111124T0011Z/
/DWNP1.1.ER.111123T1211Z.111123T1600Z.111123T1811Z.NO/
634 AM EST WED NOV 23 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR
THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 6:15 AM WEDNESDAY THE STAGE WAS 6.5 FEET.
* FLOOD STAGE IS 7.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY THIS MORNING AND CONTINUE TO RISE
TO NEAR 7.5 FEET BY LATE THIS MORNING. THE RIVER WILL FALL BELOW FLOOD
STAGE THIS AFTERNOON.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
BRANDYWINE CREEK
DOWNINGTOWN 7.0 6.47 WED 6 AM 7.5 WED 11 AM
&&3 follow-up statements
275
WGUS41 KPHI 231159
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
659 AM EST WED NOV 23 2011
...FORECAST FLOODING CHANGED FROM MINOR TO MODERATE SEVERITY FOR THE
FOLLOWING RIVERS IN PENNSYLVANIA...
EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER
COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE
WATER MAY BE DEEPER THAN YOU THINK.
&&
PAC029-231759-
/O.EXT.KPHI.FL.W.0207.111123T1158Z-111123T2112Z/
/DWNP1.2.ER.111123T1120Z.111123T1300Z.111123T1512Z.NO/
659 AM EST WED NOV 23 2011
...FORECAST FLOODING INCREASED FROM MINOR TO MODERATE SEVERITY...
THE FLOOD WARNING CONTINUES FOR
THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* FROM THIS MORNING TO THIS AFTERNOON...OR UNTIL THE WARNING IS
CANCELLED.
* AT 6:45 AM WEDNESDAY THE STAGE WAS 8.8 FEET.
* FLOOD STAGE IS 7.0 FEET.
* MINOR FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 10.9 FEET BY THIS
MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE LATE THIS MORNING.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
BRANDYWINE CREEK
DOWNINGTOWN 7.0 8.79 WED 7 AM 10.9 WED 8 AM
&&533
WGUS81 KPHI 231310
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
810 AM EST WED NOV 23 2011
...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN
PENNSYLVANIA...
EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER
COUNTY
BRANDYWINE CREEK AT CHADDS FORD AFFECTING CHESTER AND DELAWARE
COUNTIES
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE
WATER MAY BE DEEPER THAN YOU THINK.
&&
PAC029-232112-
/O.CON.KPHI.FL.W.0207.000000T0000Z-111123T2112Z/
/DWNP1.2.ER.111123T1120Z.111123T1245Z.111123T1512Z.NO/
810 AM EST WED NOV 23 2011
THE FLOOD WARNING CONTINUES FOR
THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* UNTIL THIS AFTERNOON...OR UNTIL THE WARNING IS CANCELLED.
* AT 7:45 AM WEDNESDAY THE STAGE WAS 9.3 FEET.
* FLOOD STAGE IS 7.0 FEET.
* MODERATE FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER SHOULD CREST BETWEEN 9.5 AND 9.9 FEET BETWEEN 830 AM AND 930
AM AND THEN FALL BELOW FLOOD STAGE LATE THIS MORNING. THIS FORECAST CREST IS
LOWER THAN EXPECTED EARLIER BUT STILL IN MODERATE SEVERITY.
$$
PAC029-045-232310-
/O.CON.KPHI.FL.W.0208.000000T0000Z-111124T0057Z/
/CDFP1.1.ER.111123T1250Z.111123T1500Z.111123T1857Z.NO/
810 AM EST WED NOV 23 2011
THE FLOOD WARNING CONTINUES FOR
THE BRANDYWINE CREEK AT CHADDS FORD.
* UNTIL THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 7:30 AM WEDNESDAY THE STAGE WAS 8.9 FEET.
* FLOOD STAGE IS 9.0 FEET.
* MINOR FLOODING IS FORECAST.
* FORECAST...RISE ABOVE FLOOD STAGE BY THIS MORNING AND CONTINUE TO RISE
TO BETWEEN 9.1 AND 9.5 FEET BY LATE THIS MORNING. THE RIVER WILL FALL
BELOW FLOOD STAGE MIDDAY OR THIS AFTERNOON.
* IMPACT...AT 10.0 FEET...THE INTERSECTION OF CREEK ROAD AND ROUTE 926
NEAR POCOPSON FLOODS UPSTREAM OF CHADDS FORD.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
BRANDYWINE CREEK
DOWNINGTOWN 7.0 9.29 WED 8 AM 9.6 WED 9 AM
CHADDS FORD 9.0 8.92 WED 7 AM 9.2 WED 10 AM
&&591
WGUS81 KPHI 231857
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
157 PM EST WED NOV 23 2011
...THE FLOOD WARNING IS CANCELLED FOR THE FOLLOWING RIVERS IN
PENNSYLVANIA...
EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN AFFECTING CHESTER
COUNTY
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE
WATER MAY BE DEEPER THAN YOU THINK.
&&
PAC029-231927-
/O.CAN.KPHI.FL.W.0207.000000T0000Z-111123T2112Z/
/DWNP1.2.ER.111123T1120Z.111123T1400Z.111123T1702Z.NO/
157 PM EST WED NOV 23 2011
THE FLOOD WARNING IS CANCELLED FOR
THE EAST BRANCH BRANDYWINE CREEK BELOW DOWNINGTOWN.
* AT 1:45 PM WEDNESDAY THE STAGE WAS 5.9 FEET.
* FLOOD STAGE IS 7.0 FEET.
* FELL BELOW FLOOD STAGE AT 12:02 PM WEDNESDAY.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO 1.7 FEET BY TOMORROW
MORNING.
$$
FLD OBSERVED FORECAST
LOCATION STG STG DAY TIME CREST
BRANDYWINE CREEK
DOWNINGTOWN 7.0 5.94 WED 2 PM CRESTED AND FALLING
&&The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 9:32 PM EST | Coastal Flood Advisory | PHI | Delaware, Philadelphia | 15 hr |
| Nov 22, 9:56 PM EST | Areal Flood Warning | PHI | Berks, Chester, Montgomery | 6 hr |
| Nov 23, 12:35 AM EST | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Montgomery and 2 more | 6 hr |
| Nov 23, 1:17 AM EST | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 6 hr |
| Nov 23, 2:39 AM EST | River Flood Warning | PHI | Bucks | 9 hr |
| Nov 23, 3:08 AM EST | Special Weather Statement | PHI | Bucks, Chester, Delaware, Monroe, Montgomery, Northampton and 1 more | 3 hr |
| Nov 23, 3:39 AM EST | River Flood Warning | PHI | Montgomery | 11 hr |
| Nov 23, 3:44 AM EST | Areal Flood Warning | PHI | Berks, Bucks, Chester, Delaware, Lehigh, Monroe and 3 more | 8 hr |
| Nov 23, 5:13 AM EST | Areal Flood Advisory | PHI | Philadelphia | 3 hr |
| Nov 23, 5:54 AM EST | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 16 hr |
| Nov 23, 6:57 AM EST | River Flood Warning | PHI | Chester, Delaware | 16 hr |
| Nov 23, 9:45 AM EST | Special Weather Statement | PHI | Berks | 60 min |
| Nov 23, 10:26 AM EST | River Flood Warning | PHI | Montgomery, Philadelphia | 5 hr |
| Nov 23, 11:50 AM EST | Areal Flood Warning | PHI | Berks, Chester, Montgomery | 4 hr |
Nearby
River Flood Warnings in Pennsylvania, 2011Every river flood warning in 2011
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.