Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 8, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 9, 2021, 3:49 PM EDT for Bucks County, Philadelphia County, Pennsylvania; Burlington County, New Jersey. It was in force for 3 hr. 1 report 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
- Jun 9, 2021, 3:49 PM EDT (19:49 UTC)
- Expired
- Jun 9, 2021, 6:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burlington County, NJ, Bucks County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 43 km from the middle of the area, began a volume at 19:51 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 |
|---|---|---|---|
| Jun 9, 4:15 PM EDT | FLOOD | 1 N Cooperstown, NJ | STREET FLOODING NEAR EDGEWATER PARK. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 7.8 hours before the alert went out and 193 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
- 556 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.5
The text
As transmitted.
506
WGUS51 KPHI 091949
FFWPHI
NJC005-PAC017-101-092245-
/O.NEW.KPHI.FF.W.0008.210609T1949Z-210609T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
349 PM EDT Wed Jun 9 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Burlington County in southern New Jersey...
Southeastern Bucks County in southeastern Pennsylvania...
Northeastern Philadelphia County in southeastern Pennsylvania...
* Until 645 PM EDT.
* At 349 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 0.5 to 1 inch are
possible in the warned area. 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 will experience flash flooding include...
Philadelphia, Bensalem, Mount Laurel, Willingboro, Medford,
Lumberton, Florence, Burlington, Bristol, Mount Holly, Riverside,
and Palmyra.
This includes the following highways...
New Jersey Turnpike between exits 5 and 7A.
Pennsylvania Turnpike between mile markers 349 and 359.
Interstate 95 in Pennsylvania between mile markers 29 and 40.
Interstate 295 in New Jersey between mile markers 38 and 57.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4002 7505 4014 7502 4015 7501 4016 7487
4014 7469 4005 7456 3986 7486
FLASH FLOOD...RADAR INDICATED
$$
NC2 follow-up statements
370
WGUS71 KPHI 092116
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
516 PM EDT Wed Jun 9 2021
PAC017-101-092126-
/O.CAN.KPHI.FF.W.0008.000000T0000Z-210609T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Philadelphia PA-
516 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN BUCKS AND
NORTHEASTERN PHILADELPHIA COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
LAT...LON 4014 7473 4014 7469 4005 7456 3986 7486
4001 7504 4002 7501 4007 7494 4008 7486
4010 7484 4013 7482 4012 7478
$$
NJC005-092245-
/O.CON.KPHI.FF.W.0008.000000T0000Z-210609T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-
516 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT THIS
EVENING FOR NORTHWESTERN BURLINGTON COUNTY...
At 516 PM EDT, Doppler radar indicated thunderstorms have produced
heavy rain across the warned area. Between 1 and 2.5 inches of rain
have fallen. 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 will experience flash flooding include...
Mount Laurel, Willingboro, Medford, Lumberton, Florence,
Burlington, Bristol, Mount Holly, Riverside, Palmyra, Bordentown,
and Beverly.
This includes the following highways...
New Jersey Turnpike between exits 5 and 7A.
Interstate 295 in New Jersey between mile markers 38 and 57.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4014 7473 4014 7469 4005 7456 3986 7486
4001 7504 4002 7501 4007 7494 4008 7486
4010 7484 4013 7482 4012 7478
FLASH FLOOD...RADAR INDICATED
$$
NC903
WGUS71 KPHI 092235
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
635 PM EDT Wed Jun 9 2021
NJC005-092245-
/O.EXP.KPHI.FF.W.0008.000000T0000Z-210609T2245Z/
/00000.U.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Burlington NJ-
635 PM EDT Wed Jun 9 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 645 PM EDT THIS EVENING FOR
NORTHWESTERN BURLINGTON COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4014 7473 4014 7469 4005 7456 3986 7486
4001 7504 4002 7501 4007 7494 4008 7486
4010 7484 4013 7482 4012 7478
$$
NCThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 4:54 PM EDT | Flash Flood Warning | PHI | Berks, Montgomery | 112 min |
| Jun 9, 5:27 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 23 min |
| Jun 9, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 28 min |
| Jun 8, 8:40 PM EDT | Special Marine Warning | PHI | 65 min | |
| Jun 9, 1:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 9, 1:48 PM EDT | Special Weather Statement | PHI | Salem | 27 min |
| Jun 9, 1:52 PM EDT | Special Weather Statement | PHI | Atlantic | 23 min |
| Jun 9, 2:07 PM EDT | Severe Thunderstorm Warning | PHI | Gloucester, Salem | 23 min |
| Jun 9, 2:14 PM EDT | Special Weather Statement | PHI | Salem | 31 min |
| Jun 9, 2:21 PM EDT | Flash Flood Warning | PHI | Cumberland, Gloucester, Salem | 73 min |
| Jun 9, 2:47 PM EDT | Special Marine Warning | PHI | 58 min | |
| Jun 9, 3:32 PM EDT | Special Weather Statement | PHI | Burlington | 28 min |
| Jun 9, 3:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jun 9, 3:51 PM EDT | Special Weather Statement | PHI | Hunterdon | 24 min |
| Jun 9, 6:46 PM EDT | Special Marine Warning | PHI | 59 min | |
| Jun 9, 6:50 PM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 87 min |
| Jun 9, 7:42 PM EDT | Special Marine Warning | PHI | 63 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.