Alert archive / New Jersey / Flash Flood Warnings in 2008

Flash Flood Warning 2, NWS Philadelphia/Mount Holly

March 8, 20085 counties in New Jersey; 5 counties in Pennsylvania; New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Mar 8, 2008, 12:03 PM EST for 5 counties in New Jersey; 5 counties in Pennsylvania; New Castle County, Delaware. 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
Mar 8, 2008, 12:03 PM EST (17:03 UTC)
Expired
Mar 8, 2008, 4:00 PM EST
In force
4 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

Counties New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Mercer County, NJ, Salem County, NJ, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA

The radar

The Philadelphia radar (KDIX), 77 km from the middle of the area, began a volume at 17:03 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

TimeReportWhereRemark
Mar 8, 1:50 PM ESTFLASH FLOODFeasterville-Trevose, PAFLOODING REPORTED NEAR THE PENNSYLVANIA TURNPIKE ON STREET ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.1 hours before the alert went out and 206 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, Washington/Dulle, VA at 12:00Z on 2008-03-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 2008-03-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 495 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
459 m above ground
0-6 km bulk shear
90 kt
0-1 km storm-relative helicity
495 m²/s²
0-3 km storm-relative helicity
578 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 081709
FFWPHI
DEC003-NJC005-007-015-021-033-PAC017-029-045-091-101-082100-
/O.NEW.KPHI.FF.W.0002.080308T1703Z-080308T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1203 PM EST SAT MAR 8 2008

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MERCER COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF TRENTON...
  NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF WILMINGTON...
  BUCKS COUNTY IN SOUTHEAST PENNSYLVANIA...
  CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA...
  DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
  MONTGOMERY COUNTY IN SOUTHEAST PENNSYLVANIA...
  PHILADELPHIA COUNTY IN SOUTHEAST PENNSYLVANIA...
  THIS INCLUDES THE CITY OF PHILADELPHIA...
  NORTHWESTERN BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  CAMDEN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAMDEN...
  GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
  SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 400 PM EST

* AT 1159 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR
  INDICATED AN AREA OF VERY HEAVY RAIN ASSOCIATED WITH SHOWERS AND
  THUNDERSTORMS MOVING OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  PHILADELPHIA...BENSALEM...WILLOW GROVE...DREXEL HILL...
  DOYLESTOWN...DOWNINGTOWN...BRISTOL...RIVERSIDE...MOUNT HOLLY...
  LINDENWOLD AND GLOUCESTER CITY

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

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 3942 7547 3945 7554 3940 7551 3938 7555
      3946 7558 3944 7555 3950 7557 3957 7553
      3958 7554 3948 7559 4007 7583 4053 7522
      4044 7506 4040 7504 4039 7496 4033 7493
      4034 7487 4024 7469 3996 7455
TIME...MOT...LOC 1703Z 180DEG 0KT 3967 7552

$$

SZATKOWSKI/KRUZDLO

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 4:40 AM ESTWind AdvisoryPHIAtlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 10 more27 hr
Mar 8, 10:38 AM ESTSevere Thunderstorm WarningPHIBurlington, Ocean37 min
Mar 8, 12:36 PM ESTFlash Flood WarningPHIHunterdon, Mercer, Morris, Somerset, Sussex, Warren5 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHISomerset31 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIEssex, Morris, Passaic4 days
Mar 8, 1:35 PM ESTRiver Flood WarningPHIEssex, Passaic4 days
Mar 8, 1:35 PM ESTRiver Flood WarningPHIPassaic44 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIMorris, Passaic44 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIBergen, Morris, Passaic21 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIMiddlesex, Somerset25 hr
Mar 8, 1:35 PM ESTRiver Flood WarningPHIMorris65 hr
Mar 8, 3:58 PM ESTHigh Wind WarningPHIBurlington, Camden, Gloucester, Hunterdon, Mercer, Middlesex and 7 more6 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris, Somerset5 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris, Somerset5 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris, Passaic5 hr
Mar 8, 4:09 PM ESTRiver Flood WarningPHIMorris25 hr
Mar 8, 4:28 PM ESTRiver Flood WarningPHIHunterdon, Somerset17 hr
Mar 8, 5:44 PM ESTSevere Thunderstorm WarningPHIBurlington, Camden, Gloucester46 min
Mar 8, 5:49 PM ESTSevere Thunderstorm WarningPHIWarren41 min
Mar 8, 6:03 PM ESTSevere Thunderstorm WarningPHIHunterdon, Mercer, Middlesex, Somerset57 min
Mar 8, 6:28 PM ESTSevere Thunderstorm WarningPHIMorris, Sussex62 min
Mar 8, 6:51 PM ESTRiver Flood WarningPHISomerset10 hr
Mar 8, 1:05 PM ESTRiver Flood WarningPHIBucks13 hr
Mar 8, 5:22 PM ESTSevere Thunderstorm WarningPHIDelaware23 min
Mar 8, 2:40 PM ESTSevere Thunderstorm WarningPHISussex37 min
Mar 8, 2:50 PM ESTRiver Flood WarningPHINew Castle3 hr

Nearby

Flash Flood Warnings in New Jersey, 2008Flash Flood Warnings in Pennsylvania, 2008Flash Flood Warnings in Delaware, 2008Every flash flood warning in 2008

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.