Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 20, NWS Philadelphia/Mount Holly

June 28, 2013Camden County, Gloucester County, Salem County, New Jersey; Delaware County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 28, 2013, 5:49 PM EDT for Camden County, Gloucester County, Salem County, New Jersey; Delaware County, Pennsylvania. 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: Jun 28, 2013, 5:49 PM EDT (21:49 UTC)
Expired: Jun 28, 2013, 9:45 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA

The radar

The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 21:52 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

Wallops Is Stn, VA (KWAL), launched 12:00Z, 9.8 hours before the alert went out and 208 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 292 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 914 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 50 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.

826 
WGUS51 KPHI 282149
FFWPHI
NJC007-015-033-PAC045-290145-
/O.NEW.KPHI.FF.W.0020.130628T2149Z-130629T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
549 PM EDT FRI JUN 28 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL CAMDEN COUNTY...
  SOUTHEASTERN DELAWARE COUNTY...
  NORTHERN GLOUCESTER COUNTY...
  NORTHWESTERN SALEM COUNTY...

* UNTIL 945 PM EDT...

* AT 539 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER CENTRAL CAMDEN...   
  NORTHERN   GLOUCESTER...NORTHWESTERN SALEM AND SOUTHEASTERN 
  DELAWARE COUNTIES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLOUCESTER
  CITY.

ADDITIONAL RAINFALL AMOUNTS OF UP TO 2 INCHES ARE POSSIBLE AS MORE 
THUNDERSTORMS MOVE OVER THE WARNED AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR IN AN
AUTOMOBILE. TURN AROUND DON'T DROWN!

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. TURN AROUND...DON'T DROWN! NEVER TRY
TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE
RISING WATER MOVE UP TO HIGHER GROUND.

&&

LAT...LON 3959 7554 3970 7551 3972 7548 3976 7546
      3979 7541 3985 7548 3989 7526 3987 7521
      3988 7515 3991 7513 3993 7499 3986 7492
      3980 7491 3978 7489 3979 7484 3976 7481

$$

FORECASTER:

1 follow-up statement

090 
WGUS71 KPHI 290131
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
931 PM EDT FRI JUN 28 2013

NJC007-015-033-PAC045-290141-
/O.CAN.KPHI.FF.W.0020.000000T0000Z-130629T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-DELAWARE PA-GLOUCESTER NJ-SALEM NJ-
931 PM EDT FRI JUN 28 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHWESTERN
SALEM...NORTHERN GLOUCESTER...SOUTHEASTERN DELAWARE AND CENTRAL
CAMDEN COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
NO LONGER POSE A THREAT TO LIFE OR PROPERTY. THEREFORE...THE FLASH
FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 3959 7554 3970 7551 3972 7548 3976 7546
      3979 7541 3985 7548 3989 7526 3987 7521
      3988 7515 3991 7513 3993 7499 3986 7492
      3980 7491 3978 7489 3979 7484 3976 7481

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 8:04 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Somerset	4 hr
Jun 27, 8:06 PM EDT	Special Weather Statement	PHI	Atlantic, Burlington, Ocean	54 min
Jun 27, 8:18 PM EDT	Special Weather Statement	PHI	Mercer, Middlesex, Morris, Somerset, Sussex, Warren	72 min
Jun 27, 10:00 PM EDT	Areal Flood Advisory	PHI	Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more	3 hr
Jun 27, 10:48 PM EDT	Areal Flood Warning	PHI	Somerset	4 hr
Jun 28, 1:01 AM EDT	Areal Flood Advisory	PHI	Mercer, Somerset	5 hr
Jun 28, 4:23 PM EDT	Special Weather Statement	PHI	Camden, Gloucester	52 min
Jun 28, 4:46 PM EDT	Special Marine Warning	PHI		44 min
Jun 28, 4:55 PM EDT	Severe Thunderstorm Warning	PHI	Burlington, Camden, Gloucester	65 min
Jun 28, 5:57 PM EDT	Severe Thunderstorm Warning	PHI	Burlington	48 min
Jun 28, 6:13 PM EDT	Special Weather Statement	PHI	Ocean	62 min
Jun 27, 8:50 PM EDT	Areal Flood Advisory	PHI	Carbon	3 hr
Jun 27, 10:04 PM EDT	River Flood Warning	PHI	Chester	6 hr
Jun 28, 3:19 PM EDT	Severe Thunderstorm Warning	PHI	Chester	41 min
Jun 28, 3:33 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	117 min
Jun 28, 6:04 PM EDT	Special Weather Statement	PHI	Carbon	56 min
Jun 28, 6:21 PM EDT	Flash Flood Warning	PHI	Carbon	4 hr
Jun 28, 6:43 PM EDT	Flash Flood Warning	PHI	Monroe	4 hr
Jun 28, 7:32 PM EDT	Areal Flood Advisory	PHI	Lehigh, Northampton	3 hr

Nearby

Flash Flood Warnings in New Jersey, 2013 Flash Flood Warnings in Pennsylvania, 2013 Every flash flood warning in 2013

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.