Alert archive / Pennsylvania / Flash Flood Warnings in 2023
Flash Flood Warning 32, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 8, 2023, 2:40 PM EDT for Philadelphia County, Pennsylvania; Camden County, New Jersey. It was in force for 4 hr. 2 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
- Jul 8, 2023, 2:40 PM EDT (18:40 UTC)
- Expired
- Jul 8, 2023, 6:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Camden County, NJ, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 18:40 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 |
|---|---|---|---|
| Jul 8, 3:07 PM EDT | FLOOD | 1 S Center City, PA | Flooding on I-95 southbound at Mile Post: 22.5. There is a lane restriction. |
| Jul 8, 3:15 PM EDT | FLOOD | 1 Se Kensington, PA | Flooding in Philadelphia on I-95 SB between Girard Ave and Delaware Ave, Exit 23 and Vine St. Expressway I-676 Exit 22, jammed back to Betsy Ross Brg/Aramingo Ave/Exit 26. |
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, 6.7 hours before the alert went out and 211 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
- 387 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 626 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
250
WGUS51 KPHI 081840
FFWPHI
NJC007-PAC101-082245-
/O.NEW.KPHI.FF.W.0032.230708T1840Z-230708T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
240 PM EDT Sat Jul 8 2023
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Northwestern Camden County in southern New Jersey...
Central Philadelphia County in southeastern Pennsylvania...
* Until 645 PM EDT.
* At 240 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1 inch of rain
has fallen. Additional rainfall amounts of 0.5 to 1.5 inches 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 may experience flash flooding include...
Philadelphia, Camden, Palmyra, Kensington, Center City, Ben
Franklin Bridge, Wissinoming, Tacony, Holmesburg, Pennsauken, and
Merchantville.
This includes the following highways...
Interstate 95 in Pennsylvania between mile markers 20 and 30.
Interstate 76 in Pennsylvania between mile markers 343 and 345.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 3 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3992 7516 3995 7522 4000 7518 4008 7506
4003 7501 4002 7502 4001 7505 3999 7506
3999 7505 4000 7504 4000 7503 3999 7503
3997 7505 3994 7506
FLASH FLOOD...RADAR INDICATED
$$
Hoeflich2 follow-up statements
750
WGUS71 KPHI 082003
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
403 PM EDT Sat Jul 8 2023
NJC007-PAC101-082245-
/O.CON.KPHI.FF.W.0032.000000T0000Z-230708T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Philadelphia PA-
403 PM EDT Sat Jul 8 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT THIS
EVENING FOR NORTHWESTERN CAMDEN AND CENTRAL PHILADELPHIA COUNTIES...
At 403 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 1.5 inches of rain have
fallen. Additional rainfall amounts up to 0.5 inches are possible in
the warned area. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Philadelphia, Camden, Palmyra, Kensington, Center City, Ben
Franklin Bridge, Wissinoming, Tacony, Holmesburg, Pennsauken, and
Merchantville.
This includes the following highways...
Interstate 95 in Pennsylvania between mile markers 20 and 30.
Interstate 76 in Pennsylvania between mile markers 343 and 345.
Interstate 676 in Pennsylvania between mile markers 0 and 1.
Interstate 676 in New Jersey between mile markers 3 and 4.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 3992 7516 3995 7522 4000 7518 4008 7506
4003 7501 4002 7502 4001 7505 3999 7506
3999 7505 4000 7504 4000 7503 3999 7503
3997 7505 3994 7506
FLASH FLOOD...RADAR INDICATED
$$
Hoeflich469
WGUS71 KPHI 082238
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
638 PM EDT Sat Jul 8 2023
NJC007-PAC101-082248-
/O.EXP.KPHI.FF.W.0032.000000T0000Z-230708T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Philadelphia PA-
638 PM EDT Sat Jul 8 2023
...FLASH FLOOD WARNING WILL EXPIRE AT 645 PM EDT THIS EVENING FOR
NORTHWESTERN CAMDEN AND CENTRAL PHILADELPHIA COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat.
LAT...LON 3992 7516 3995 7522 4000 7518 4008 7506
4003 7501 4002 7502 4001 7505 3999 7506
3999 7505 4000 7504 4000 7503 3999 7503
3997 7505 3994 7506
$$
MLBThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 1:28 PM EDT | Areal Flood Advisory | PHI | Philadelphia | 95 min |
| Jul 8, 2:05 PM EDT | Special Weather Statement | PHI | Philadelphia | 25 min |
| Jul 8, 2:28 PM EDT | Areal Flood Advisory | PHI | Philadelphia | 21 min |
| Jul 8, 3:00 PM EDT | Special Weather Statement | PHI | Philadelphia | 30 min |
| Jul 8, 3:17 PM EDT | Flood Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 31 hr |
| Jul 8, 3:44 PM EDT | Special Weather Statement | PHI | Bucks | 31 min |
| Jul 8, 3:52 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 3 hr |
| Jul 8, 4:49 PM EDT | Special Weather Statement | PHI | Delaware | 26 min |
| Jul 8, 5:00 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware, Montgomery, Philadelphia | 25 min |
| Jul 8, 5:15 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 8, 5:19 PM EDT | Special Weather Statement | PHI | Delaware | 26 min |
| Jul 8, 5:30 PM EDT | Special Weather Statement | PHI | Chester | 30 min |
| Jul 8, 5:43 PM EDT | Areal Flood Advisory | PHI | Chester | 10 min |
| Jul 8, 5:51 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 8, 6:02 PM EDT | Special Weather Statement | PHI | Montgomery | 28 min |
| Jul 8, 6:33 PM EDT | Areal Flood Advisory | PHI | Chester, Montgomery | 3 hr |
| Jul 8, 1:49 PM EDT | Areal Flood Advisory | PHI | Burlington | 3 hr |
| Jul 8, 2:13 PM EDT | Special Weather Statement | PHI | Middlesex | 32 min |
| Jul 8, 2:19 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 41 min |
| Jul 8, 3:21 PM EDT | Special Weather Statement | PHI | Burlington | 24 min |
| Jul 8, 3:38 PM EDT | Special Weather Statement | PHI | Camden, Gloucester | 37 min |
| Jul 8, 3:55 PM EDT | Special Weather Statement | PHI | Mercer | 35 min |
| Jul 8, 3:57 PM EDT | Special Weather Statement | PHI | Burlington | 33 min |
| Jul 8, 4:11 PM EDT | Special Weather Statement | PHI | Gloucester | 34 min |
| Jul 8, 4:16 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2023Flash Flood Warnings in New Jersey, 2023Every flash flood warning in 2023
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.