Alert archive / New Jersey / Flash Flood Warnings in 2013

Flash Flood Warning 25, NWS Philadelphia/Mount Holly

June 30, 2013Camden County, Gloucester County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 30, 2013, 1:28 PM EDT for Camden County, Gloucester County, Salem County, New Jersey. 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: Jun 30, 2013, 1:28 PM EDT (17:28 UTC)
Expired: Jun 30, 2013, 5:30 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

The radar

The Philadelphia radar (KDIX), 70 km from the middle of the area, began a volume at 17:28 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

Time	Report	Where	Remark
Jun 30, 2:45 PM EDT	FLASH FLOOD	Atco, NJ	NUMEROUS ROADWAYS FLOODED INCLUDING THE WHITE HORSE PIKE. MANY YARDS ARE FLOODED.

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 12:00Z, 5.5 hours before the alert went out and 202 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: 874 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 583 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

937 
WGUS51 KPHI 301728
FFWPHI
NJC007-015-033-302130-
/O.NEW.KPHI.FF.W.0025.130630T1728Z-130630T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
128 PM EDT SUN JUN 30 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CAMDEN COUNTY...
  GLOUCESTER COUNTY...
  SALEM COUNTY...

* UNTIL 530 PM EDT...

* AT 119 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES
  AND RAIN GAGE REPORTS INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM
  OVER GLOUCESTER AND SALEM COUNTIES AND MOVING TOWARD CAMDEN 
  COUNTY. TWO TO THREE INCH STORM TOTALS ARE LIKELY.

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

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN
THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3945 7551 3945 7552 3966 7554 3971 7550
      3972 7548 3976 7546 3995 7501 3994 7498
      3993 7498 3989 7493 3980 7491 3978 7489
      3979 7481 3974 7475

$$

TFG

1 follow-up statement

291 
WGUS71 KPHI 302103
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
503 PM EDT SUN JUN 30 2013

NJC007-015-033-302111-
/O.CAN.KPHI.FF.W.0025.000000T0000Z-130630T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CAMDEN NJ-GLOUCESTER NJ-SALEM NJ-
503 PM EDT SUN JUN 30 2013

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SALEM...GLOUCESTER
AND CAMDEN COUNTIES...

THE WATERS FROM THE EARLIER HEAVY RAINS ARE RECEDING AND FLOOD WATERS
AWAY FROM THE RACCOON CREEK NO LONGER POSE A THREAT TO LIFE OR PROPERTY.
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN CANCELLED. FLOODING ALONG
THE RACCOON CREEK IS BEING HANDLED IN A SEPARATE FLOOD WARNING STATEMENT
FOR GLOUCESTER COUNTY.

LAT...LON 3945 7551 3945 7552 3966 7554 3971 7550
      3972 7548 3976 7546 3995 7501 3994 7498
      3993 7498 3989 7493 3980 7491 3978 7489
      3979 7481 3974 7475

$$

TFG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 5:29 AM EDT	Rip Current Statement	PHI	Atlantic, Cape May, Monmouth, Ocean	15 hr
Jun 30, 12:26 PM EDT	Special Weather Statement	PHI	Gloucester	49 min
Jun 30, 1:05 PM EDT	Severe Thunderstorm Warning	PHI	Camden, Gloucester	55 min
Jun 30, 1:45 PM EDT	Areal Flood Advisory	PHI	Burlington	4 hr
Jun 30, 2:32 PM EDT	Flash Flood Warning	PHI	Burlington	4 hr
Jun 30, 2:40 PM EDT	Flash Flood Warning	PHI	Burlington	4 hr
Jun 30, 3:13 PM EDT	Areal Flood Advisory	PHI	Monmouth, Ocean	4 hr
Jun 30, 4:59 PM EDT	Areal Flood Warning	PHI	Gloucester	9 hr

Nearby

Flash Flood Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.