Alert archive / Pennsylvania / Areal Flood Warnings in 2016

Areal Flood Warning 8, NWS Philadelphia/Mount Holly

February 25, 20164 counties in Pennsylvania; Burlington County, Camden County, Gloucester County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Feb 25, 2016, 2:04 AM EST for 4 counties in Pennsylvania; Burlington County, Camden County, Gloucester County, New Jersey. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Feb 25, 2016, 2:04 AM EST (07:04 UTC)
Expired
Feb 25, 2016, 6:00 AM EST
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Bucks County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 61 km from the middle of the area, began a volume at 07:05 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 7.1 hours before the alert went out and 219 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.

Skew-T log-pSkew-T log-p diagram, Brookhaven, NY at 00:00Z on 2016-02-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 38 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 00:00Z on 2016-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 529 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
38 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
479 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
529 m²/s²
0-3 km storm-relative helicity
504 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

891 
WGUS41 KPHI 250704
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
204 AM EST THU FEB 25 2016

NJC005-007-015-PAC017-045-091-101-251100-
/O.NEW.KPHI.FA.W.0008.160225T0704Z-160225T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-BUCKS PA-DELAWARE PA-
MONTGOMERY PA-PHILADELPHIA PA-
204 AM EST THU FEB 25 2016

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ  HAS ISSUED A

* FLOOD WARNING FOR...
  NORTHWESTERN CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  SOUTHEASTERN BUCKS COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  EASTERN DELAWARE COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  SOUTHEASTERN MONTGOMERY COUNTY IN SOUTHEASTERN PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEASTERN PENNSYLVANIA...

* UNTIL 600 AM EST

* AT 159 AM EST...THIS WARNING REPLACES THE FLASH FLOOD WARNING.
  WATERS ARE RECEDING ALONG THE SMALLER CREEKS, BUT ARE STILL RISING
  ON SOME OF THE LARGER CREEKS AND STREAMS. THE SOUTHBOUND LANES OF
  INTERSTATE 295 AT MILE MARKER 27 IN CAMDEN COUNTY WERE SHUT DOWN
  DUE TO FLOODING.
  
PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. 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. MOVE TO HIGHER GROUND.

&&

LAT...LON 3964 7511 3984 7548 4031 7515 4011 7476

$$

KRUZDLO
2 follow-up statements
104 
WGUS81 KPHI 251013
FLSPHI

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
513 AM EST THU FEB 25 2016

NJC005-007-015-PAC017-045-091-251021-
/O.CAN.KPHI.FA.W.0008.000000T0000Z-160225T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-GLOUCESTER NJ-BURLINGTON NJ-BUCKS PA-DELAWARE PA-
MONTGOMERY PA-
513 AM EST THU FEB 25 2016

...THE FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN CAMDEN...
NORTHWESTERN GLOUCESTER...NORTHWESTERN BURLINGTON...SOUTHEASTERN
BUCKS...EASTERN DELAWARE AND SOUTHEASTERN MONTGOMERY COUNTIES...

THE HEAVY RAIN AND FLOODING THREAT HAS ENDED. 

LAT...LON 4005 7498 3998 7508 3996 7513 3990 7513
      3987 7521 3987 7526 3994 7524 3997 7528
      4001 7521 4005 7526 4009 7523 4008 7517
      4005 7510 4014 7501 4012 7497 4008 7496

$$

PAC101-251100-
/O.CON.KPHI.FA.W.0008.000000T0000Z-160225T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILADELPHIA PA-
513 AM EST THU FEB 25 2016

...A FLOOD WARNING REMAINS IN EFFECT UNTIL 600 AM EST FOR
PHILADELPHIA COUNTY...

AT 511 AM EST...THE PENNYPACK AND WISSAHICKON CREEKS REMAIN
ELEVATED. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. 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. MOVE TO HIGHER GROUND.

&&

LAT...LON 4005 7498 3998 7508 3996 7513 3990 7513
      3987 7521 3987 7526 3994 7524 3997 7528
      4001 7521 4005 7526 4009 7523 4008 7517
      4005 7510 4014 7501 4012 7497 4008 7496

$$

KRUZDLO
728 
WGUS81 KPHI 251052
FLSPHI

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
552 AM EST THU FEB 25 2016

PAC101-251100-
/O.EXP.KPHI.FA.W.0008.000000T0000Z-160225T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PHILADELPHIA PA-
552 AM EST THU FEB 25 2016

...THE FLOOD WARNING WILL EXPIRE AT 600 AM EST PHILADELPHIA COUNTY...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT.

LAT...LON 4005 7498 3998 7508 3996 7513 3990 7513
      3987 7521 3987 7526 3994 7524 3997 7528
      4001 7521 4005 7526 4009 7523 4008 7517
      4005 7510 4014 7501 4012 7497 4008 7496

$$

KRUZDLO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 24, 7:12 PM ESTSevere Thunderstorm WarningPHIChester, Delaware33 min
Feb 24, 7:21 PM ESTAreal Flood AdvisoryPHIChester4 hr
Feb 24, 7:35 PM ESTAreal Flood AdvisoryPHICarbon, Monroe6 hr
Feb 24, 7:39 PM ESTSevere Thunderstorm WarningPHIBerks, Chester36 min
Feb 24, 8:13 PM ESTSpecial Weather StatementPHIChester, Montgomery62 min
Feb 24, 8:23 PM ESTSpecial Weather StatementPHILehigh, Monroe, Northampton67 min
Feb 24, 8:42 PM ESTAreal Flood AdvisoryPHIBucks, Chester, Delaware, Lehigh, Monroe, Montgomery and 2 more4 hr
Feb 24, 8:47 PM ESTSevere Thunderstorm WarningPHIChester43 min
Feb 24, 9:18 PM ESTAreal Flood AdvisoryPHIBucks4 hr
Feb 24, 9:40 PM ESTSevere Thunderstorm WarningPHIBucks, Delaware, Montgomery, Philadelphia35 min
Feb 24, 9:44 PM ESTAreal Flood WarningPHIBerks, Chester, Montgomery10 hr
Feb 24, 9:55 PM ESTFlash Flood WarningPHIBucks, Lehigh, Monroe, Northampton4 hr
Feb 24, 10:05 PM ESTFlash Flood WarningPHIBucks, Chester, Delaware, Montgomery, Philadelphia4 hr
Feb 24, 10:11 PM ESTRiver Flood WarningPHIChester20 hr
Feb 24, 10:32 PM ESTFlash Flood WarningPHIBucks4 hr
Feb 24, 11:03 PM ESTSevere Thunderstorm WarningPHIBucks42 min
Feb 25, 12:19 AM ESTRiver Flood WarningPHIMontgomery14 hr
Feb 25, 12:28 AM ESTRiver Flood WarningPHIChester, Delaware18 hr
Feb 25, 12:37 AM ESTRiver Flood WarningPHIChester, Montgomery, Philadelphia28 hr
Feb 25, 1:55 AM ESTAreal Flood WarningPHIBucks, Lehigh, Monroe, Northampton6 hr
Feb 25, 2:07 AM ESTRiver Flood WarningPHIBerks, Montgomery8 hr
Feb 25, 2:22 AM ESTAreal Flood WarningPHIBucks8 hr
Feb 25, 7:41 AM ESTAreal Flood WarningPHIBerks, Chester, Montgomery6 hr
Feb 25, 7:51 AM ESTAreal Flood WarningPHIBucks, Lehigh, Monroe, Northampton6 hr
Feb 24, 7:10 PM ESTFlash Flood WarningPHIMercer, Middlesex, Monmouth, Somerset3 hr
Feb 24, 8:48 PM ESTAreal Flood AdvisoryPHICumberland, Gloucester, Salem4 hr
Feb 24, 9:02 PM ESTSpecial Marine WarningPHI58 min
Feb 24, 9:24 PM ESTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 3 more4 hr
Feb 24, 10:06 PM ESTSpecial Weather StatementPHISussex39 min
Feb 24, 10:19 PM ESTSpecial Marine WarningPHI56 min
Feb 24, 10:26 PM ESTSpecial Weather StatementPHISussex34 min
Feb 24, 10:36 PM ESTSpecial Weather StatementPHIAtlantic, Ocean39 min
Feb 24, 10:49 PM ESTAreal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Monmouth, Ocean4 hr
Feb 24, 10:51 PM ESTSpecial Weather StatementPHIMercer, Middlesex, Morris, Somerset54 min
Feb 24, 11:11 PM ESTSpecial Weather StatementPHIMonmouth, Ocean64 min
Feb 24, 11:22 PM ESTSpecial Marine WarningPHI53 min
Feb 24, 11:25 PM ESTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean15 min
Feb 25, 12:04 AM ESTSpecial Weather StatementPHIAtlantic, Monmouth, Ocean56 min
Feb 25, 2:26 AM ESTRiver Flood WarningPHISomerset33 hr
Feb 25, 2:31 AM ESTRiver Flood WarningPHIMorris, Passaic31 hr
Feb 25, 10:02 AM ESTRiver Flood WarningPHIMorris25 hr
Feb 25, 10:13 AM ESTAreal Flood WarningPHISomerset6 hr
Feb 25, 12:37 PM ESTAreal Flood WarningPHISussex, Warren8 hr
Feb 25, 3:28 PM ESTAreal Flood WarningPHISomerset14 hr

Nearby

Areal Flood Warnings in Pennsylvania, 2016Areal Flood Warnings in New Jersey, 2016Every areal flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.