Alert archive / Pennsylvania / Flash Flood Warnings in 2015
Flash Flood Warning 31, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 6, 2015, 8:18 PM EDT for Bucks County, Montgomery County, Pennsylvania; Hunterdon 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 6, 2015, 8:18 PM EDT (00:18 UTC)
- Expired
- Jul 7, 2015, 12:15 AM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 84 km from the middle of the area, began a volume at 00:22 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 6, 8:55 PM EDT | FLASH FLOOD | Perkasie, PA | EIGHT INCH DEEP WATER ON SEVERAL ROADWAYS. |
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 00:00Z, 0.3 hours before the alert went out and 208 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
- 1205 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
146
WGUS51 KPHI 070018
FFWPHI
NJC019-PAC017-091-070415-
/O.NEW.KPHI.FF.W.0031.150707T0018Z-150707T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
818 PM EDT MON JUL 6 2015
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHWESTERN HUNTERDON COUNTY IN NORTHWESTERN NEW JERSEY...
NORTHWESTERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
NORTH CENTRAL MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...
* UNTIL 1215 AM EDT
* AT 817 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO ONE AND A HALF INCHES OF
RAIN HAS ALREADY FALLEN WITH AN ADDITIONAL INCH OR MORE POSSIBLE.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
PERKASIE...BYRAM...SOUDERTON...BEDMINSTER...TINICUM...HATFIELD...
DUBLIN...REVERE...OTTSVILLE...LUMBERVILLE...FRICKS...PIPERSVILLE...
GARDENVILLE...TELFORD...SELLERSVILLE AND SILVERDALE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.
&&
LAT...LON 4027 7528 4034 7539 4054 7519 4041 7503
$$
ROBERTSON2 follow-up statements
721 WGUS71 KPHI 070108 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 908 PM EDT MON JUL 6 2015 NJC019-PAC091-070117- /O.CAN.KPHI.FF.W.0031.000000T0000Z-150707T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ HUNTERDON NJ-MONTGOMERY PA- 908 PM EDT MON JUL 6 2015 ...THE FLASH FLOOD WARNING FOR SOUTHWESTERN HUNTERDON AND NORTH CENTRAL MONTGOMERY COUNTIES IS CANCELLED... THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. ADDITIONAL SHOWERS AND THUNDERSTORMS ARE POSSIBLE INTO THE EVENING. LAT...LON 4030 7527 4036 7537 4054 7519 4045 7508 $$ PAC017-070415- /O.CON.KPHI.FF.W.0031.000000T0000Z-150707T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BUCKS PA- 908 PM EDT MON JUL 6 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR NORTHWESTERN BUCKS COUNTY... AT 907 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN WITH AN ADDITIONAL INCH OR MORE POSSIBLE. ROADWAY FLOODING HAS ALREADY BEEN REPORTED IN PERKASIE. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... PERKASIE...BEDMINSTER...TINICUM...DUBLIN...REVERE...OTTSVILLE... PIPERSVILLE...TELFORD...SELLERSVILLE AND SILVERDALE. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. && LAT...LON 4030 7527 4036 7537 4054 7519 4045 7508 $$ ROBERTSON
377 WGUS71 KPHI 070251 FFSPHI FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1051 PM EDT MON JUL 6 2015 PAC017-070415- /O.CON.KPHI.FF.W.0031.000000T0000Z-150707T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BUCKS PA- 1051 PM EDT MON JUL 6 2015 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR NORTHWESTERN BUCKS COUNTY... TRAINED WEATHER SPOTTERS REPORTED WATER EIGHT INCHES DEEP ON SOME AREA ROADWAYS IN PERKASIE. UP TO THREE INCHES OF RAIN HAVE ALREADY FALLEN FROM EARLIER THUNDERSTORMS AND IT MAY TAKE SOME TIME FOR AREA STREAMS AND CREEKS TO FULLY RECEDE. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... PERKASIE...BEDMINSTER...TINICUM...DUBLIN...REVERE...OTTSVILLE... PIPERSVILLE...TELFORD...SELLERSVILLE AND SILVERDALE. PRECAUTIONARY/PREPAREDNESS ACTIONS... BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. && LAT...LON 4030 7527 4036 7537 4054 7519 4045 7508 $$ MWG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 8:52 PM EDT | Areal Flood Advisory | PHI | Bucks, Northampton | 4 hr |
| Jul 7, 3:28 PM EDT | Special Weather Statement | PHI | Northampton | 62 min |
| Jul 7, 3:54 PM EDT | Special Weather Statement | PHI | Monroe | 36 min |
| Jul 7, 4:20 PM EDT | Special Weather Statement | PHI | Monroe | 40 min |
| Jul 7, 3:26 PM EDT | Special Weather Statement | PHI | Morris, Warren | 64 min |
| Jul 7, 3:49 PM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Sussex, Warren | 4 hr |
| Jul 7, 4:12 PM EDT | Special Weather Statement | PHI | Mercer | 33 min |
| Jul 7, 4:36 PM EDT | Special Weather Statement | PHI | Middlesex | 39 min |
| Jul 7, 4:51 PM EDT | Special Weather Statement | PHI | Warren | 39 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2015Flash Flood Warnings in New Jersey, 2015Every flash flood warning in 2015
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.