Alert archive / New Jersey / Flash Flood Warnings in 2009

Flash Flood Warning 63, NWS Philadelphia/Mount Holly

September 11, 2009Cape May County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 11, 2009, 6:59 AM EDT for Cape May County, New Jersey. It was in force for 3 hr. 2 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
Sep 11, 2009, 6:59 AM EDT (10:59 UTC)
Expired
Sep 11, 2009, 9:30 AM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Cape May County, NJ

The radar

The Dover AFB radar (KDOX), 58 km from the middle of the area, began a volume at 10:59 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
Sep 11, 7:45 AM EDTHEAVY RAIN 4.14Green Creek, NJSTORM TOTAL OF 4.14 INCHES.
Sep 11, 7:45 AM EDTHEAVY RAIN 4.23Seaville, NJSTORM TOTAL OF 4.23 AS OF 730AM.

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

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 11.0 hours before the alert went out and 135 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, Wallops Is Stn, VA at 00:00Z on 2009-09-11Temperature 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, Wallops Is Stn, VA at 00:00Z on 2009-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
515 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
187 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 111059
FFWPHI
NJC009-111330-
/O.NEW.KPHI.FF.W.0063.090911T1059Z-090911T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
659 AM EDT FRI SEP 11 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CAPE MAY COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF CAPE MAY...

* UNTIL 930 AM EDT

* AT 656 AM EDT...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING   
  FROM EARLIER THUNDERSTORMS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SEAVILLE...
  GOSHEN...DENNISVILLE...WOODBINE...SEA ISLE CITY AND AVALON

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. 

&&

LAT...LON 3892 7497 3899 7498 3909 7491 3915 7490
      3917 7491 3924 7486 3924 7461 3912 7470
      3907 7471 3902 7479 3899 7479 3893 7488

$$

KRUZDLO

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 11, 2:20 AM EDTSpecial Marine WarningPHI85 min
Sep 11, 2:48 AM EDTSevere Thunderstorm WarningPHICape May72 min
Sep 11, 3:06 AM EDTFlash Flood WarningPHICape May4 hr
Sep 11, 3:07 AM EDTCoastal Flood AdvisoryPHIAtlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 2 more12 hr
Sep 11, 3:25 AM EDTSpecial Marine WarningPHI95 min
Sep 11, 3:44 AM EDTSpecial Marine WarningPHI95 min
Sep 11, 3:55 AM EDTSevere Thunderstorm WarningPHICape May, Cumberland65 min
Sep 11, 4:55 AM EDTSevere Thunderstorm WarningPHICape May, Cumberland65 min
Sep 11, 5:05 AM EDTSpecial Marine WarningPHI115 min
Sep 11, 5:17 AM EDTSpecial Marine WarningPHI88 min
Sep 11, 5:36 AM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland69 min
Sep 11, 5:52 AM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland53 min
Sep 11, 6:12 AM EDTAreal Flood AdvisoryPHIAtlantic, Cape May, Cumberland2 hr
Sep 11, 6:39 AM EDTSpecial Marine WarningPHI96 min
Sep 11, 6:49 AM EDTSevere Thunderstorm WarningPHIAtlantic, Cape May, Cumberland86 min
Sep 11, 8:18 AM EDTAreal Flood AdvisoryPHIAtlantic, Cape May, Cumberland117 min
Sep 11, 8:31 AM EDTAreal Flood AdvisoryPHIAtlantic, Camden, Cumberland, Gloucester, Salem119 min
Sep 11, 8:46 AM EDTSevere Thunderstorm WarningPHIMonmouth39 min
Sep 11, 8:58 AM EDTCoastal Flood StatementPHIAtlantic, Cape May, Monmouth, Ocean35 hr
Sep 11, 9:02 AM EDTWind AdvisoryPHIMonmouth, Ocean3 hr

Nearby

Flash Flood Warnings in New Jersey, 2009Every flash flood warning in 2009

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.