Alert archive / Pennsylvania / Areal Flood Warnings in 2011
Areal Flood Warning 16, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Apr 16, 2011, 6:37 PM EDT for 5 counties in Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 8 hr. 3 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
- Apr 16, 2011, 6:37 PM EDT (22:37 UTC)
- Expired
- Apr 17, 2011, 2:30 AM EDT
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Warren County, NJ, Bucks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA
The radar
The Binghamton radar (KBGM), 142 km from the middle of the area, began a volume at 22:40 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 |
|---|---|---|---|
| Apr 16, 7:40 PM EDT | FLOOD | Richlandtown, PA | URBAN POOR DRAINAGE FLOODING AT RICHLANDTOWN PIKE AND EBERT ROAD |
| Apr 16, 10:00 PM EDT | FLOOD | Plumstead Twp, PA | RT 32 AND PT PLEASANT PIKE FLOODED AND A MUDSLIDE WITH A PARTIAL ROAD BLOCKAGE. |
| Apr 16, 10:01 PM EDT | FLOOD | East Rockhill Tpw, PA | STONE EDGE ROAD... CREEK FLOODING THE ROAD |
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, 10.6 hours before the alert went out and 220 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
- 875 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 264 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
711
WGUS41 KPHI 162237
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
637 PM EDT SAT APR 16 2011
NJC019-041-PAC017-025-077-089-095-170630-
/O.NEW.KPHI.FA.W.0016.110416T2237Z-110417T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN NJ-HUNTERDON NJ-LEHIGH PA-NORTHAMPTON PA-CARBON PA-BUCKS PA-
MONROE PA-
637 PM EDT SAT APR 16 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* FLOOD WARNING FOR URBAN AREAS AND SMALL STREAMS IN...
WESTERN WARREN COUNTY IN NORTHWEST NEW JERSEY...
WESTERN HUNTERDON COUNTY IN NORTHWEST NEW JERSEY...
LEHIGH COUNTY IN EASTERN PENNSYLVANIA...
NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
CARBON COUNTY IN NORTHEAST PENNSYLVANIA...
WESTERN BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
* UNTIL 230 AM EDT SUNDAY
* AT 637 PM EDT AROUND ONE INCH OF RAIN HAS FALLEN ACROSS PORTIONS
OF THE AREA OVER THE LAST HOUR OR TWO. AN ADDITIONAL ONE TO TWO
INCHES IS EXPECTED OVER THE NEXT FEW HOURS AND WILL CAUSE FLOODING
ACROSS THE AREA...ESPECIALLY IN URBANIZED AREAS AND ALONG SMALLER
CREEKS AND STREAMS. SEVERAL GAUGED STREAMS ARE RISING AND WILL
CONTINUE TO RISE THROUGH THE EVENING.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS IMMEDIATELY.
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.
&&
LAT...LON 4126 7514 4116 7516 4115 7509 4109 7504
4109 7500 4035 7497 4020 7513 4068 7590
4074 7578 4084 7594 4091 7600 4100 7575
4105 7579 4110 7577 4114 7570 4113 7564
4121 7557 4125 7550
$$
ROBERTSON2 follow-up statements
303
WGUS81 KPHI 162348
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
748 PM EDT SAT APR 16 2011
NJC019-041-PAC017-025-077-089-095-170630-
/O.CON.KPHI.FA.W.0016.000000T0000Z-110417T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN NJ-HUNTERDON NJ-LEHIGH PA-NORTHAMPTON PA-CARBON PA-BUCKS PA-
MONROE PA-
748 PM EDT SAT APR 16 2011
...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM EDT SUNDAY FOR
URBAN AREAS AND SMALL STREAMS IN MONROE...WESTERN BUCKS...CARBON...
NORTHAMPTON...LEHIGH...WESTERN HUNTERDON AND WESTERN WARREN
COUNTIES...
AT 748 PM EDT ONE TO TWO INCHES OF RAIN HAS FALLEN ACROSS MUCH OF
THE AREA. WITH MORE SHOWERS AND ISOLATED THUNDERSTORMS APPROACHING
FROM THE WEST...AN ADDITIONAL INCH OR MORE MAY FALL AND IS EXPECTED
TO CONTINUE TO CAUSE FLOODING...ESPECIALLY IN URBANIZED AREAS AND
ALONG SMALLER CREEKS AND STREAMS. MANY GAUGED STREAMS WILL CONTINUE
TO RISE THROUGH THE EVENING.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR IS OCCURRING. ALL
INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS IMMEDIATELY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
&&
LAT...LON 4126 7514 4116 7516 4115 7509 4109 7504
4109 7500 4035 7497 4020 7513 4068 7590
4074 7578 4084 7594 4091 7600 4100 7575
4105 7579 4110 7577 4114 7570 4113 7564
4121 7557 4125 7550
$$
ROBERTSON191
WGUS81 KPHI 170317
FLSPHI
FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1117 PM EDT SAT APR 16 2011
NJC019-041-PAC017-025-077-089-095-170630-
/O.CON.KPHI.FA.W.0016.000000T0000Z-110417T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WARREN NJ-HUNTERDON NJ-LEHIGH PA-NORTHAMPTON PA-CARBON PA-BUCKS PA-
MONROE PA-
1117 PM EDT SAT APR 16 2011
...THE FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM EDT FOR URBAN
AREAS AND SMALL STREAMS IN MONROE...WESTERN BUCKS...CARBON...
NORTHAMPTON...LEHIGH...WESTERN HUNTERDON AND WESTERN WARREN
COUNTIES...
AT 1115 PM EDT, NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE
HEAVIEST RAIN IS SHIFTING NORTHEAST OF THE AREA. HOWEVER, AN
AREA OF SHOWERS WILL CONTINUE INTO THE OVERNIGHT HOURS UNTIL A COLD
FRONT CLEARS THE AREA. WHILE RAINFALL RATES ARE EXPECTED TO LESSEN
WITH THE REMAINING SHOWERS, ADDITIONAL RUNOFF FROM THE EARLIER HEAVY
RAIN WILL CONTINUE TO PRODUCE AREAS OF FLOODING IN POOR DRAINAGE
AREAS AND ON SOME ROADWAYS.
A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
ALL INTERESTED PARTIES SHOULD TAKE THE NECESSARY PRECAUTIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE ELEVATED LEVELS ON
SMALL CREEKS AND STREAMS...AND PONDING OF WATER IN URBAN AREAS...
HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER POOR DRAINAGE
AREAS AND LOW LYING SPOTS.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
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.
&&
LAT...LON 4126 7514 4116 7516 4115 7509 4109 7504
4109 7500 4035 7497 4020 7513 4068 7590
4074 7578 4084 7594 4091 7600 4100 7575
4105 7579 4110 7577 4114 7570 4113 7564
4121 7557 4125 7550
$$
GORSEThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 3:25 AM EDT | Coastal Flood Warning | PHI | Delaware, Philadelphia | 31 hr |
| Apr 16, 4:07 AM EDT | Flood Watch | PHI | Berks, Carbon, Delaware, Lehigh, Monroe, Northampton and 1 more | 24 hr |
| Apr 16, 6:22 PM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery | 12 hr |
| Apr 16, 7:47 PM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 12 hr |
Nearby
Areal Flood Warnings in Pennsylvania, 2011Areal Flood Warnings in New Jersey, 2011Every areal flood warning in 2011
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.