Alert archive / Pennsylvania / Flash Flood Warnings in 2019
Flash Flood Warning 12, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at May 30, 2019, 5:17 PM EDT for 4 counties in Pennsylvania; 4 counties in New Jersey. It was in force for 4 hr. 4 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
- May 30, 2019, 5:17 PM EDT (21:17 UTC)
- Expired
- May 30, 2019, 8:47 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, Mercer County, NJ, Monmouth County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 43 km from the middle of the area, began a volume at 21:17 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 |
|---|---|---|---|
| May 30, 5:40 PM EDT | FLOOD | 1 Se Roxborough, PA | UP TO FOUR FEET OF WATER UNDER AN OVERPASS ON FAIRMOUNT PARK DR. |
| May 30, 5:48 PM EDT | FLOOD | 1 Ese Tacony, PA | FLOODING ON INTERSTATE 95 AT EXIT 30. RAMP CLOSURE IN PLACE. |
| May 30, 6:11 PM EDT | FLOOD | 1 Nne Lawrence Park, PA | FLOODING ON INTERSTATE 476 NEAR THE BROOMALL EXIT. LANE RESTRICTIONS IN PLACE. |
| May 30, 6:36 PM EDT | FLOOD | 1 Se Roxborough, PA | MARTIN LUTHER KING JR. DRIVE CLOSED NEAR MONTGOMERY DRIVE FROM FLOODING. |
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, 9.3 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 546 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- -63 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
259
WGUS51 KPHI 302117
FFWPHI
NJC005-007-021-025-PAC017-045-091-101-310115-
/O.NEW.KPHI.FF.W.0012.190530T2117Z-190531T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
517 PM EDT Thu May 30 2019
The National Weather Service in Mount Holly NJ has issued a
* Flash Flood Warning for...
Northwestern Camden County in southern New Jersey...
Southeastern Mercer County in central New Jersey...
Northwestern Burlington County in southern New Jersey...
Southwestern Monmouth County in central New Jersey...
Southeastern Montgomery County in southeastern Pennsylvania...
Southeastern Bucks County in southeastern Pennsylvania...
Philadelphia County in southeastern Pennsylvania...
Eastern Delaware County in southeastern Pennsylvania...
* Until 915 PM EDT.
* At 516 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen. Flash flooding is expected to begin shortly in the
areas of heaviest rain.
* Some locations that could experience flooding include...
Philadelphia, Trenton, Camden, Bensalem, Chester, Willingboro,
Florence, Yeadon, Burlington, Bristol, Riverside, Palmyra,
Folcroft, Swarthmore, Hightstown, Narberth, Bordentown, East
Lansdowne, Beverly and Rockledge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 4010 7451 3985 7538 3997 7546 3999 7543
4028 7451 4015 7444
$$
Meola2 follow-up statements
400
WGUS71 KPHI 302255
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
655 PM EDT Thu May 30 2019
NJC005-007-021-025-PAC017-045-091-101-310115-
/O.CON.KPHI.FF.W.0012.000000T0000Z-190531T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Mercer NJ-Burlington NJ-Monmouth NJ-Montgomery PA-Bucks PA-
Philadelphia PA-Delaware PA-
655 PM EDT Thu May 30 2019
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
NORTHWESTERN CAMDEN...SOUTHEASTERN MERCER...NORTHWESTERN
BURLINGTON...SOUTHWESTERN MONMOUTH...SOUTHEASTERN MONTGOMERY...
SOUTHEASTERN BUCKS...PHILADELPHIA AND EASTERN DELAWARE COUNTIES...
At 654 PM EDT, Doppler radar indicated the thunderstorms with heavy
rain have moved out of the warning area. However additional rain is
possible with more showers in southeastern Pennsylvania. Up to two
inches of rain have already fallen and it will take some time for
the runoff to recede. Flash flooding is expected to begin shortly.
Some locations that could experience flooding include...
Philadelphia, Trenton, Camden, Bensalem, Chester, Willingboro,
Florence, Yeadon, Burlington, Bristol, Riverside, Palmyra, Folcroft,
Swarthmore, Hightstown, Narberth, Bordentown, East Lansdowne, Beverly
and Rockledge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 4010 7451 3985 7538 3997 7546 3999 7543
4028 7451 4015 7444
$$
SFJ103
WGUS71 KPHI 310047
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
847 PM EDT Thu May 30 2019
NJC005-007-021-025-PAC017-045-091-101-310056-
/O.CAN.KPHI.FF.W.0012.000000T0000Z-190531T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Mercer NJ-Burlington NJ-Monmouth NJ-Montgomery PA-Bucks PA-
Philadelphia PA-Delaware PA-
847 PM EDT Thu May 30 2019
...THE FLASH FLOOD WARNING FOR NORTHWESTERN CAMDEN...SOUTHEASTERN
MERCER...NORTHWESTERN BURLINGTON...SOUTHWESTERN MONMOUTH...
SOUTHEASTERN MONTGOMERY...SOUTHEASTERN BUCKS...PHILADELPHIA AND
EASTERN DELAWARE COUNTIES IS CANCELLED...
The heaviest rain has ended. Flooding is no longer expected to pose
a threat. Please continue to heed any remaining road closures.
LAT...LON 4010 7451 3985 7538 3997 7546 3999 7543
4028 7451 4015 7444
$$
SFJThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 8:16 PM EDT | River Flood Warning | PHI | Bucks | 11 hr |
| May 29, 9:57 PM EDT | Areal Flood Warning | PHI | Lehigh | 2 hr |
| May 30, 3:20 AM EDT | Flash Flood Watch | PHI | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 18 hr |
| May 30, 3:33 AM EDT | Dense Fog Advisory | PHI | Bucks, Montgomery | 4 hr |
| May 30, 4:03 PM EDT | Special Weather Statement | PHI | Berks | 27 min |
| May 30, 4:17 PM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 4 hr |
| May 30, 4:19 PM EDT | Areal Flood Advisory | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 4 hr |
| May 30, 4:22 PM EDT | Special Weather Statement | PHI | Delaware | 23 min |
| May 30, 4:25 PM EDT | Special Weather Statement | PHI | Northampton | 35 min |
| May 30, 4:36 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 39 min |
| May 30, 4:40 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 50 min |
| May 30, 4:48 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Northampton | 42 min |
| May 30, 4:49 PM EDT | Flash Flood Warning | PHI | Lehigh, Northampton | 4 hr |
| May 30, 4:57 PM EDT | Areal Flood Advisory | PHI | Bucks | 4 hr |
| May 30, 5:02 PM EDT | Special Weather Statement | PHI | Philadelphia | 28 min |
| May 30, 5:03 PM EDT | Areal Flood Advisory | PHI | Berks, Bucks, Chester, Montgomery | 4 hr |
| May 30, 5:20 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 40 min |
| May 30, 6:51 PM EDT | Special Weather Statement | PHI | Berks | 24 min |
| May 30, 7:35 PM EDT | Special Weather Statement | PHI | Bucks, Chester, Montgomery | 25 min |
| May 30, 7:56 PM EDT | Special Weather Statement | PHI | Bucks, Montgomery | 34 min |
| May 29, 8:00 PM EDT | Special Marine Warning | PHI | 60 min | |
| May 29, 8:02 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Ocean | 107 min |
| May 29, 8:35 PM EDT | Special Marine Warning | PHI | 85 min | |
| May 30, 4:46 PM EDT | Special Weather Statement | PHI | Salem | 29 min |
| May 30, 4:58 PM EDT | Special Marine Warning | PHI | 62 min | |
| May 30, 5:14 PM EDT | Special Weather Statement | PHI | Salem | 31 min |
| May 30, 5:22 PM EDT | Areal Flood Advisory | PHI | Cape May, Cumberland, Gloucester, Salem | 2 hr |
| May 30, 5:23 PM EDT | Special Weather Statement | PHI | Mercer | 37 min |
| May 30, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Cape May | 43 min |
| May 30, 5:33 PM EDT | Special Marine Warning | PHI | 27 min | |
| May 30, 5:55 PM EDT | Special Marine Warning | PHI | 65 min | |
| May 30, 5:55 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 31 min |
| May 30, 6:06 PM EDT | Flash Flood Warning | PHI | Hunterdon, Middlesex, Morris, Somerset | 4 hr |
| May 30, 6:53 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 4 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2019Flash Flood Warnings in New Jersey, 2019Every flash flood warning in 2019
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.