Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 86, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 23, 2021, 1:42 PM EDT for 4 counties in Pennsylvania; Burlington County, Camden County, Gloucester County, New Jersey. It was in force for 4 hr. 21 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 23, 2021, 1:42 PM EDT (17:42 UTC)
- Expired
- Sep 23, 2021, 6:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 76 km from the middle of the area, began a volume at 17:46 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 23, 1:51 PM EDT | FLOOD | 1 Nw Philadelphia, PA | FLOODING ON INTERSTATE 676 NEAR BROAD STREET WITH LANE RESTRICTIONS. TIME BASED ON DISPATCH REPORT. |
| Sep 23, 2:00 PM EDT | FLOOD | Haddon Heights, NJ | HEAVY RAIN, STREET FLOODING; WATER OVER CURBS IN LOW LYING STREETS. |
| Sep 23, 2:00 PM EDT | FLASH FLOOD | 1 Ssw Summerdale, PA | THE GAUGE ON FRANKFORD CREEK AT FRANKFORD (FRCP1) REACHED FLOOD STAGE AND CRESTED AT 9.21 FEET (MODERATE FLOODING) AT 215 PM. |
| Sep 23, 2:00 PM EDT | FLASH FLOOD | Chester, PA | SEVERAL ROADS FLOODED AND CLOSED IN CHESTER. TIME BASED ON SURROUNDING DISPATCH REPORTS. REPORT VIA SOCIAL MEDIA. |
| Sep 23, 2:05 PM EDT | FLOOD | Doylestown, PA | STREET FLOODING; ESTIMATED RAIN RATE OF 2-3 INCHES PER HOUR. |
| Sep 23, 2:19 PM EDT | FLOOD | Sellersville, PA | STREET FLOODING. |
| Sep 23, 2:20 PM EDT | FLASH FLOOD | 2 Ese South Philadelphi, PA | BROAD STREET EXIT OFF INTERSTATE 95 IS FLOODED AND IMPASSABLE. TIME BASED ON SOCIAL MEDIA REPORT. |
| Sep 23, 2:30 PM EDT | FLASH FLOOD | Eastwick, PA | SEVERAL REPORTS OF FLOODING ON INTERSTATE 95 NEAR PHILADELPHIA INTERNATIONAL AIRPORT. RAMP CLOSURES AND LANE RESTRICTIONS REQUIRED. TIME BASED ON DISPATCH REPORTS. |
| Sep 23, 2:36 PM EDT | FLOOD | 1 Wsw Mt. Ephraim, NJ | FLOODING ON INTERSTATE 76 NEAR EXIT 1A. TIME BASED ON DISPATCH REPORT. |
| Sep 23, 2:38 PM EDT | FLASH FLOOD | 1 Ene Whitman Park, NJ | COMBINATION OF FLASH FLOODING AND COASTAL FLOODING FORCED ROAD CLOSURES AND LANE RESTRICTIONS NEAR U.S. HIGHWAY 30 AND BAIRD AVENUE. TIME BASED ON DISPATCH REPORTS. |
| Sep 23, 2:45 PM EDT | FLASH FLOOD | Brooklawn, NJ | COMBINATION OF FLASH FLOODING AND COASTAL FLOODING HAS CLOSED U.S. HIGHWAY 130 IN PORTIONS OF BROOKLAWN. TIME BASED ON DISPATCH REPORT. |
| Sep 23, 2:47 PM EDT | FLASH FLOOD | Westville, NJ | COMBINATION OF FLASH FLOODING AND COASTAL FLOODING HAS CLOSED STATE HIGHWAY 47 IN PORTIONS OF BROOKLAWN. TIME BASED ON DISPATCH REPORT. |
| Sep 23, 2:50 PM EDT | FLASH FLOOD | 3 Se Point Breeze, PA | FLOODING ON INTERSTATE 76 NEAR THE PENNSYLVANIA AND NEW JERSEY BORDER. SEVERAL REPORTS OF LANE RESTRICTIONS AND RAMP CLOSURES. TIME BASED ON DISPATCH REPORTS. |
| Sep 23, 3:00 PM EDT | FLASH FLOOD | Camden, NJ | SEVERAL ROADS FLOODED IN DOWNTOWN CAMDEN WITH ROAD CLOSURES REQUIRED. TIME BASED ON SOCIAL MEDIA POSTS AND DISPATCH REPORTS. |
| Sep 23, 3:00 PM EDT | FLASH FLOOD | Gloucester City, NJ | VEHICLES STUCK IN FLOOD WATERS ON BROADWAY. TIME BASED ON RADAR AND SURROUNDING REPORTS. REPORT AND VIDEO FROM SOCIAL MEDIA. |
| Sep 23, 3:44 PM EDT | HEAVY RAIN 1.7 | East Rockhill Twp, PA | 1.70 INCHES OF RAINFALL SINCE NOON. |
| Sep 23, 3:58 PM EDT | FLOOD | Logan Twp., NJ | COMBINATION OF FRESHWATER AND TIDAL FLOODING FORCED LANE RESTRICTIONS ON U.S. HIGHWAY 130 NEAR ISLAND ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 23, 4:40 PM EDT | FLOOD | Bensalem, PA | POQUESSING CREEK OVERFLOWING ITS BANKS. |
| Sep 23, 4:40 PM EDT | FLASH FLOOD | Bensalem, PA | CORRECTS PREVIOUS FLOOD REPORT FROM BENSALEM. POQUESSING CREEK OVERFLOWING ITS BANKS. |
| Sep 23, 5:00 PM EDT | HEAVY RAIN 1.67 | Warwick Twp, PA | ROAD FLOODING REPORTED ON SOCIAL MEDIA. TIME ESTIMATED. |
| Sep 23, 5:33 PM EDT | HEAVY RAIN 2.11 | 2 Nw New Britain, PA | ROAD FLOODING REPORTED. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.7 hours before the alert went out and 212 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 517 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -71 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.0
The text
As transmitted.
122
WGUS51 KPHI 231742
FFWPHI
NJC005-007-015-PAC017-045-091-101-232200-
/O.NEW.KPHI.FF.W.0086.210923T1742Z-210923T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
142 PM EDT Thu Sep 23 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Burlington County in southern New Jersey...
Northwestern Camden County in southern New Jersey...
Northwestern Gloucester County in southern New Jersey...
Western Bucks County in southeastern Pennsylvania...
Southeastern Delaware County in southeastern Pennsylvania...
Central Montgomery County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
* Until 600 PM EDT.
* At 142 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain moving into the warned area. Between 0.5 and 1 inch of
rain has fallen. The expected rainfall rate is 1 to 2.5 inches in
1 hour. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Philadelphia, Camden, Gloucester City, Cherry Hill, Bensalem,
Mount Laurel, Chester, Willingboro, Deptford, West Deptford,
Lansdale, and Lumberton.
This includes the following highways...
New Jersey Turnpike between exits 2 and 5.
Pennsylvania Turnpike between mile markers 336 and 354.
Interstate 95 in Pennsylvania between mile markers 11 and 39.
Interstate 76 in Pennsylvania between mile markers 349 and 351.
Interstate 76 in New Jersey between mile markers 0 and 3.
Interstate 295 in New Jersey between mile markers 9 and 48.
Interstate 676 in Pennsylvania near mile marker 1.
Interstate 676 in New Jersey between mile markers 0 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4052 7535 3998 7475 3969 7530 3969 7531
3969 7532 3970 7534 3971 7536 3973 7538
3975 7538 3984 7536 3986 7532 3993 7517
4014 7525 4023 7533 4030 7557
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2.5 INCHES IN 1 HOUR
$$
CMS1 follow-up statement
578
WGUS71 KPHI 232151
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
551 PM EDT Thu Sep 23 2021
NJC005-007-015-PAC017-045-091-101-232201-
/O.EXP.KPHI.FF.W.0086.000000T0000Z-210923T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-Camden NJ-Gloucester NJ-Bucks PA-Delaware PA-
Montgomery PA-Philadelphia PA-
551 PM EDT Thu Sep 23 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 6 PM EDT THIS EVENING FOR
NORTHWESTERN BURLINGTON, NORTHWESTERN CAMDEN, NORTHWESTERN
GLOUCESTER, WESTERN BUCKS, SOUTHEASTERN DELAWARE, CENTRAL
MONTGOMERY, AND PHILADELPHIA COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
A Flash Flood Watch remains in effect until 200 AM EDT Friday for
portions of northern Delaware...and southeast Pennsylvania.
A Flash Flood Watch remains in effect until 200 AM EDT Friday for
portions of east central Pennsylvania...northeast Pennsylvania...and
southeast Pennsylvania.
LAT...LON 4052 7535 3998 7475 3969 7530 3969 7531
3969 7532 3970 7534 3971 7536 3973 7538
3975 7538 3984 7536 3986 7532 3993 7517
4014 7525 4023 7533 4030 7557
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 23, 9:12 AM EDT | Coastal Flood Advisory | PHI | Bucks, Delaware, Philadelphia | 10 hr |
| Sep 23, 10:52 AM EDT | Areal Flood Advisory | PHI | Chester | 3 hr |
| Sep 23, 11:33 AM EDT | Areal Flood Advisory | PHI | Berks, Chester, Delaware, Montgomery, Philadelphia | 3 hr |
| Sep 23, 11:40 AM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Carbon, Lehigh, Montgomery, Northampton | 3 hr |
| Sep 23, 11:57 AM EDT | Flash Flood Warning | PHI | Chester, Delaware | 3 hr |
| Sep 23, 12:12 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 48 min |
| Sep 23, 12:28 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Sep 23, 12:54 PM EDT | Special Weather Statement | PHI | Philadelphia | 51 min |
| Sep 23, 12:56 PM EDT | Areal Flood Advisory | PHI | Bucks, Carbon, Lehigh, Monroe, Montgomery, Northampton and 1 more | 3 hr |
| Sep 23, 12:57 PM EDT | Special Weather Statement | PHI | Bucks | 33 min |
| Sep 23, 1:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 47 min |
| Sep 23, 1:48 PM EDT | River Flood Warning | PHI | Chester | 5 hr |
| Sep 23, 1:58 PM EDT | Special Weather Statement | PHI | Bucks | 32 min |
| Sep 23, 2:37 PM EDT | Areal Flood Advisory | PHI | Bucks, Northampton | 3 hr |
| Sep 23, 3:26 PM EDT | Flash Flood Warning | PHI | Bucks | 2 hr |
| Sep 23, 4:26 PM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 80 min |
| Sep 23, 7:18 PM EDT | Areal Flood Warning | PHI | Berks, Montgomery | 36 min |
| Sep 22, 8:43 PM EDT | Gale Warning | PHI | 18 hr | |
| Sep 23, 2:47 PM EDT | Special Weather Statement | PHI | Hunterdon, Mercer | 28 min |
| Sep 23, 2:52 PM EDT | Special Weather Statement | PHI | Camden | 23 min |
| Sep 23, 3:13 PM EDT | Special Weather Statement | PHI | Mercer, Somerset | 32 min |
| Sep 23, 3:16 PM EDT | Special Weather Statement | PHI | Burlington | 29 min |
| Sep 23, 3:23 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 52 min |
| Sep 23, 3:50 PM EDT | Special Weather Statement | PHI | Burlington | 25 min |
| Sep 23, 4:21 PM EDT | Areal Flood Advisory | PHI | Middlesex, Monmouth, Morris, Ocean, Somerset, Sussex | 15 min |
| Sep 23, 4:36 PM EDT | Flash Flood Warning | PHI | Middlesex, Monmouth, Morris, Somerset, Sussex | 3 hr |
| Sep 23, 5:00 PM EDT | Special Weather Statement | PHI | Monmouth | 30 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2021Flash Flood Warnings in New Jersey, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.