Alert archive / Pennsylvania / Areal Flood Advisories in 2012

Areal Flood Advisory 21, NWS Philadelphia/Mount Holly

May 26, 2012Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood advisory at May 26, 2012, 2:18 PM EDT for Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 26, 2012, 2:18 PM EDT (18:18 UTC)
Expired
May 26, 2012, 7:28 PM EDT
In force
5 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 136 km from the middle of the area, began a volume at 18:21 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 12:00Z, 6.3 hours before the alert went out and 170 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 12:00Z on 2012-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 144 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2012-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.1939Sfc1 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
144 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
659 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
105 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

794 
WGUS81 KPHI 261818
FLSPHI

FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
218 PM EDT SAT MAY 26 2012

NJC037-041-PAC089-095-270015-
/O.NEW.KPHI.FA.Y.0021.120526T1818Z-120527T0015Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-WARREN NJ-NORTHAMPTON PA-MONROE PA-
218 PM EDT SAT MAY 26 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED AN

* URBAN AND SMALL STREAM FLOOD ADVISORY FOR...
  SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
  NORTHERN WARREN COUNTY IN NORTHWEST NEW JERSEY...
  NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
  EAST CENTRAL MONROE COUNTY IN NORTHEAST PENNSYLVANIA...

* UNTIL 815 PM EDT

* AT 217 PM EDT ONE TO TWO INCHES OF RAIN HAS FALLEN ACROSS THE AREA 
OVER THE LAST ONE TO TWO HOURS. ADDITIONAL RAINFALL AMOUNTS OF AN 
INCH OR MORE ARE POSSIBLE IN THE ADVISED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE 
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS 
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF 
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4114 7443 4112 7445 4085 7515 4104 7536
      4115 7508 4110 7505 4109 7501 4111 7495
      4121 7487 4123 7487 4131 7467

$$

ROBERTSON
1 follow-up statement
072 
WGUS81 KPHI 262328
FLSPHI

FLOOD ADVISORY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
728 PM EDT SAT MAY 26 2012

NJC037-041-PAC089-095-262338-
/O.CAN.KPHI.FA.Y.0021.000000T0000Z-120527T0015Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SUSSEX NJ-WARREN NJ-NORTHAMPTON PA-MONROE PA-
728 PM EDT SAT MAY 26 2012

...THE URBAN AND SMALL STREAM FLOOD ADVISORY HAS BEEN CANCELLED FOR
EAST CENTRAL MONROE...NORTHEASTERN NORTHAMPTON...NORTHERN WARREN AND
SUSSEX COUNTIES...

THE HEAVIEST RAIN HAS ENDED FOR THIS EVENING. SOME SMALLER CREEKS 
AND STREAMS MAY CONTINUE TO RISE...BUT SHOULD BEGIN RECEDING OVER 
THE NEXT COUPLE OF HOURS.

MORE HEAVY RAINFALL IS POSSIBLE ON SUNDAY WHICH COULD CAUSE 
ADDITIONAL FLOODING.

LAT...LON 4114 7443 4112 7445 4085 7515 4104 7536
      4115 7508 4110 7505 4109 7501 4111 7495
      4121 7487 4123 7487 4131 7467

$$

ROBERTSON

The office that day

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

IssuedProductOfficeCountiesLasted
May 26, 2:02 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton58 min
May 26, 2:23 PM EDTAreal Flood AdvisoryPHICarbon3 hr
May 26, 2:36 PM EDTFlash Flood WarningPHIMonroe, Northampton5 hr
May 26, 2:42 PM EDTSevere Thunderstorm WarningPHIMonroe, Northampton48 min
May 26, 2:46 PM EDTSpecial Weather StatementPHICarbon44 min
May 26, 3:15 PM EDTAreal Flood AdvisoryPHICarbon2 hr
May 26, 3:32 PM EDTFlash Flood WarningPHIMonroe, Northampton4 hr
May 26, 3:39 PM EDTSpecial Weather StatementPHIMonroe51 min
May 26, 3:40 PM EDTExcessive Heat WatchPHIDelaware, Philadelphia23 hr
May 26, 3:45 PM EDTAreal Flood AdvisoryPHICarbon3 hr
May 26, 3:48 PM EDTAreal Flood AdvisoryPHIMonroe3 hr
May 26, 3:51 PM EDTSpecial Weather StatementPHICarbon39 min
May 26, 3:54 PM EDTFlash Flood WarningPHICarbon4 hr
May 26, 4:31 PM EDTAreal Flood AdvisoryPHICarbon, Monroe, Northampton3 hr
May 26, 4:37 PM EDTSpecial Weather StatementPHICarbon, Monroe38 min
May 26, 4:54 PM EDTSpecial Weather StatementPHINorthampton51 min
May 26, 5:26 PM EDTSpecial Weather StatementPHIBucks49 min
May 26, 5:33 PM EDTFlash Flood WarningPHIMonroe114 min
May 26, 5:36 PM EDTAreal Flood AdvisoryPHILehigh, Northampton114 min
May 26, 6:02 PM EDTSpecial Weather StatementPHIBerks43 min
May 26, 6:10 PM EDTAreal Flood AdvisoryPHIBerks, Bucks, Montgomery111 min
May 26, 6:26 PM EDTSpecial Weather StatementPHIBerks49 min
May 26, 7:18 PM EDTAreal Flood AdvisoryPHIBucks60 min
May 26, 7:20 PM EDTAreal Flood AdvisoryPHIBerks, Chester59 min
May 26, 1:39 PM EDTSpecial Weather StatementPHIWarren51 min
May 26, 1:42 PM EDTSpecial Weather StatementPHISussex63 min
May 26, 2:28 PM EDTSpecial Weather StatementPHISussex62 min
May 26, 7:30 PM EDTSpecial Weather StatementPHIMiddlesex45 min

Nearby

Areal Flood Advisories in Pennsylvania, 2012Areal Flood Advisories in New Jersey, 2012Every areal flood advisory in 2012

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.