Alert archive / Pennsylvania / Flash Flood Warnings in 2018
Flash Flood Warning 22, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 3, 2018, 5:45 PM EDT for Delaware County, Montgomery County, Philadelphia County, Pennsylvania; Camden County, Gloucester County, New Jersey. It was in force for 4 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
- Jul 3, 2018, 5:45 PM EDT (21:45 UTC)
- Expired
- Jul 3, 2018, 9:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Camden County, NJ, Gloucester County, NJ, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 3, 6:30 PM EDT | FLASH FLOOD | Westville, NJ | FLASH FLOODING REPORTED ON SEVERAL STREETS IN TOWN |
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, 9.8 hours before the alert went out and 221 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
- 574 J/kg
- Mixed-layer CIN
- -189 J/kg
- Mixed-layer LCL
- 1257 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
955 WGUS51 KPHI 032145 FFWPHI NJC007-015-PAC045-091-101-040145- /O.NEW.KPHI.FF.W.0022.180703T2145Z-180704T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Mount Holly NJ 545 PM EDT TUE JUL 3 2018 The National Weather Service in Mount Holly NJ has issued a * Flash Flood Warning for... Northwestern Camden County in southern New Jersey... North central Gloucester County in southern New Jersey... Southeastern Montgomery County in southeastern Pennsylvania... Southwestern Philadelphia County in southeastern Pennsylvania... Northeastern Delaware County in southeastern Pennsylvania... * Until 945 PM EDT. * At 544 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, Camden, Gloucester City, Deptford, Voorhees, Lindenwold, Bellmawr, Yeadon, Woodbury, Folcroft, Magnolia, Westville, Narberth, Woodbury Heights, National Park, East Lansdowne, Brooklawn, Audubon Park, Darby Township and Morris Park. Additional rainfall amounts of up to two inches are possible in the warned area. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4007 7525 3984 7493 3976 7507 3997 7538 $$ SFJ
2 follow-up statements
025 WGUS71 KPHI 040001 FFSPHI Flash Flood Statement National Weather Service Mount Holly NJ 801 PM EDT TUE JUL 3 2018 NJC007-015-PAC045-091-101-040145- /O.CON.KPHI.FF.W.0022.000000T0000Z-180704T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Camden NJ-Gloucester NJ-Montgomery PA-Philadelphia PA-Delaware PA- 801 PM EDT TUE JUL 3 2018 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT FOR NORTHWESTERN CAMDEN...NORTH CENTRAL GLOUCESTER...SOUTHEASTERN MONTGOMERY...SOUTHWESTERN PHILADELPHIA AND NORTHEASTERN DELAWARE COUNTIES... At 759 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to three inches of rain have already fallen. Flash flooding may already be occuring. Though the heaviest rain has left the warning area...it will take time for the runoff to recede. Some locations that could experience flooding include... Philadelphia, Camden, Gloucester City, Deptford, Voorhees, Lindenwold, Bellmawr, Yeadon, Woodbury, Folcroft, Magnolia, Westville, Narberth, Woodbury Heights, National Park, East Lansdowne, Brooklawn, Audubon Park, Darby Township and Morris Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 4007 7525 3984 7493 3976 7507 3997 7538 $$ SFJ
237
WGUS71 KPHI 040024
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
824 PM EDT TUE JUL 3 2018
NJC007-015-040032-
/O.CAN.KPHI.FF.W.0022.000000T0000Z-180704T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Camden NJ-Gloucester NJ-
824 PM EDT TUE JUL 3 2018
...THE FLASH FLOOD WARNING FOR NORTHWESTERN CAMDEN AND NORTH CENTRAL
GLOUCESTER COUNTIES IS CANCELLED...
Flooding is no longer expected to pose a threat. Please continue to
heed any remaining road closures.
LAT...LON 3997 7538 4007 7525 3995 7514 3990 7514
3986 7521 3987 7523
$$
PAC045-091-101-040145-
/O.CON.KPHI.FF.W.0022.000000T0000Z-180704T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery PA-Philadelphia PA-Delaware PA-
824 PM EDT TUE JUL 3 2018
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM EDT FOR
SOUTHEASTERN MONTGOMERY...SOUTHWESTERN PHILADELPHIA AND NORTHEASTERN
DELAWARE COUNTIES...
At 822 PM EDT, Doppler radar indicated mainly light rain showers
across southwestern Philadelphia County and adjacent areas of
Montgomery and Delaware Counties. Since some small streams are
running high, the Flash Flood Warning for the area remains in effect
until this water recedes.
Some locations that could experience flooding include...
Philadelphia, Yeadon, Folcroft, Narberth, National Park, East
Lansdowne, Darby Township, Broomall, Morris Park, Roxborough, South
Philadelphia, Drexel Hill, Bryn Mawr, Darby, Lansdowne, Collingdale,
Clifton Heights, Sharon Hill, Aldan and Colwyn.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3997 7538 4007 7525 3995 7514 3990 7514
3986 7521 3987 7523
$$
jjmThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 2:15 PM EDT | Special Weather Statement | PHI | Delaware | 30 min |
| Jul 3, 3:00 PM EDT | Special Weather Statement | PHI | Philadelphia | 60 min |
| Jul 3, 3:11 PM EDT | Flash Flood Warning | PHI | Montgomery, Philadelphia | 50 min |
| Jul 3, 4:06 PM EDT | Special Weather Statement | PHI | Montgomery | 54 min |
| Jul 3, 4:30 PM EDT | Special Weather Statement | PHI | Bucks | 60 min |
| Jul 3, 5:24 PM EDT | Areal Flood Advisory | PHI | Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 3, 5:29 PM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery, Philadelphia | 4 hr |
| Jul 3, 5:30 PM EDT | Special Weather Statement | PHI | Philadelphia | 30 min |
| Jul 3, 6:03 PM EDT | Special Weather Statement | PHI | Monroe | 57 min |
| Jul 3, 6:15 PM EDT | Special Weather Statement | PHI | Chester | 60 min |
| Jul 3, 6:18 PM EDT | Severe Thunderstorm Warning | PHI | Delaware, Philadelphia | 42 min |
| Jul 3, 6:21 PM EDT | Special Weather Statement | PHI | Delaware | 24 min |
| Jul 3, 6:25 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Philadelphia | 50 min |
| Jul 3, 6:37 PM EDT | Flash Flood Warning | PHI | Bucks, Philadelphia | 3 hr |
| Jul 3, 6:40 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 4 hr |
| Jul 3, 6:50 PM EDT | Special Weather Statement | PHI | Delaware | 55 min |
| Jul 3, 6:54 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware | 51 min |
| Jul 3, 6:58 PM EDT | Flash Flood Warning | PHI | Chester, Delaware | 4 hr |
| Jul 3, 7:03 PM EDT | Special Weather Statement | PHI | Northampton | 57 min |
| Jul 3, 7:06 PM EDT | Flash Flood Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 2 hr |
| Jul 3, 7:22 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 21 min |
| Jul 3, 7:35 PM EDT | Special Weather Statement | PHI | Chester | 25 min |
| Jul 3, 7:39 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 51 min |
| Jul 3, 7:54 PM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 3, 2:33 PM EDT | Special Weather Statement | PHI | Union | 27 min |
| Jul 3, 2:57 PM EDT | Special Weather Statement | PHI | Morris | 63 min |
| Jul 3, 3:19 PM EDT | Flash Flood Warning | PHI | Morris | 3 hr |
| Jul 3, 3:28 PM EDT | Special Weather Statement | PHI | Salem | 62 min |
| Jul 3, 3:30 PM EDT | Special Weather Statement | PHI | Burlington | 60 min |
| Jul 3, 3:43 PM EDT | Flash Flood Warning | PHI | Morris | 2 hr |
| Jul 3, 4:49 PM EDT | Special Weather Statement | PHI | Somerset | 56 min |
| Jul 3, 4:52 PM EDT | Special Weather Statement | PHI | Mercer | 53 min |
| Jul 3, 4:57 PM EDT | Flash Flood Warning | PHI | Hunterdon, Somerset | 114 min |
| Jul 3, 5:47 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Somerset | 2 hr |
| Jul 3, 5:57 PM EDT | Special Weather Statement | PHI | Gloucester | 33 min |
| Jul 3, 6:11 PM EDT | Severe Thunderstorm Warning | PHI | Camden, Gloucester | 49 min |
| Jul 3, 6:46 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 44 min |
| Jul 3, 6:58 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 49 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2018Flash Flood Warnings in New Jersey, 2018Every flash flood warning in 2018
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.