Alert archive / Pennsylvania / Flash Flood Warnings in 2005

Flash Flood Warning 31, NWS Philadelphia/Mount Holly

October 12, 2005Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 12, 2005, 2:15 AM EDT for Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 6 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
Oct 12, 2005, 2:15 AM EDT (06:15 UTC)
Expired
Oct 12, 2005, 8:00 AM EDT
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

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

The radar

The Philadelphia radar (KDIX), 128 km from the middle of the area, began a volume at 06:16 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, 6.3 hours before the alert went out and 207 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 2005-10-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLEL10008507005003002001001 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 2005-10-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.193958Sfc1 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
7 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
438 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
52 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.

000 
WGUS51 KPHI 120614
FFWPHI
NJC041-PAC089-095-121200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
215 AM EDT WED OCT 12 2005

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA
  WARREN COUNTY IN NORTHWEST NEW JERSEY

* UNTIL 800 AM EDT

* AT 210 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THAT AN INCH OR TWO OF RAIN HAS ALREADY FALLEN IN MUCH OF WARREN 
  COUNTY AND MONROE COUNTY, AS WELL AS IN THE EXTREME EASTERN PART
  OF NORTHAMPTON COUNTY.

ADDITIONAL RAINFALL AMOUNTS OF ONE TO TWO INCHES ARE EXPECTED DURING 
THE REMAINDER OF THE OVERNIGHT PERIOD.  THE HEAVY RAIN FALLING ON 
THE ALREADY SATURATED GROUND WILL LIKELY RESULT IN FLOODING OF SMALL 
CREEKS AND STREAMS, AS WELL AS HIGHWAYS AND UNDERPASSES.  
ADDITIONALLY, COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS, 
STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

LAT...LON 4057 7535 4091 7480 4122 7518 4114 7559
      4084 7546 4077 7557

$$

IOVINO
1 follow-up statement
000 
WGUS71 KPHI 120849
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
450 AM EDT WED OCT 12 2005

NJC041-PAC089-095-121200-
WARREN NJ-NORTHAMPTON PA-MONROE PA-
450 AM EDT WED OCT 12 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 800 AM EDT FOR MONROE...
NORTHAMPTON AND WARREN COUNTIES...

AT 445 AM, NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT ONE 
TO THREE INCHES OF RAIN HAS ALREADY FALLEN THROUGHOUT MUCH OF WARREN 
COUNTY AND MONROE COUNTY, AS WELL AS IN THE EASTERN PART OF 
NORTHAMPTON COUNTY DURING THE NIGHT.  AN ADDITIONAL INCH OF RAIN MAY 
FALL BY 800 AM.  AS A RESULT, THE FLASH FLOOD WARNING CONTINUES.

THE HEAVY RAIN FALLING ON THE ALREADY SATURATED GROUND WILL LIKELY 
RESULT IN FLOODING OF SMALL CREEKS AND STREAMS, AS WELL AS HIGHWAYS 
AND UNDERPASSES MAKING FOR A DIFFICULT MORNING COMMUTE.  DO NOT 
DRIVE THROUGH FLOOD WATERS, THE WATER MAY BE DEEPER THAN YOU THINK 
IT IS.

LAT...LON 4057 7535 4091 7480 4122 7518 4114 7559
      4084 7546 4077 7557

$$

IOVINO

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 12, 2:45 AM EDTFlash Flood WarningPHIHunterdon, Mercer5 hr
Oct 12, 5:40 AM EDTFlash Flood WarningPHISomerset4 hr
Oct 12, 6:35 AM EDTFlash Flood WarningPHIMiddlesex3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2005Flash Flood Warnings in New Jersey, 2005Every flash flood warning in 2005

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.