Alert archive / New Jersey / Flash Flood Warnings in 2009

Flash Flood Warning 27, NWS Philadelphia/Mount Holly

July 31, 2009Burlington County, Monmouth County, Ocean County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 31, 2009, 5:31 PM EDT for Burlington County, Monmouth County, Ocean County, New Jersey. It was in force for 4 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: Jul 31, 2009, 5:31 PM EDT (21:31 UTC)
Expired: Jul 31, 2009, 9:10 PM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

Counties Burlington County, NJ, Monmouth County, NJ, Ocean County, NJ

The radar

The Philadelphia radar (KDIX), 23 km from the middle of the area, began a volume at 21:32 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
Jul 31, 6:30 PM EDT	FLASH FLOOD	Toms River, NJ	FLASH FLOODING REPORTED ON ROUTE 37 NEAR HOSPITAL DRIVE WITH WATER RESCUES. ALSO, FLASH FLOODING REPORTED ON ROUTES 35 AND 88. NO INJURIES REPORTED.
Jul 31, 6:37 PM EDT	FLASH FLOOD	Long Branch, NJ	FLASH FLOODING REPORTED IN LONG BRANCH WITH WATER RESCUES. NO INJURIES REPORTED.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.5 hours before the alert went out and 144 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: 48 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 184 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 312131
FFWPHI
NJC005-025-029-010130-
/O.NEW.KPHI.FF.W.0027.090731T2131Z-090801T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
531 PM EDT FRI JUL 31 2009

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MONMOUTH COUNTY IN CENTRAL NEW JERSEY...
  THIS INCLUDES THE CITY OF SANDY HOOK...
  EAST CENTRAL BURLINGTON COUNTY IN SOUTHERN NEW JERSEY...
  OCEAN COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITY OF TOMS RIVER...

* UNTIL 930 PM EDT

* AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  AN AREA OF EXCESSIVE RAINFALL OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SIX FLAGS
  THEME PARK...MIDDLETOWN...MARLBORO...JACKSONS MILLS...HOWELL...
  HOLMDEL...FREEWOOD ACRES...ELBERON...COLLINGWOOD PARK...
  CASSVILLE...ADELPHIA...WEST FREEHOLD...TINTON FALLS...RED BANK...
  MANASQUAN...LONG BRANCH...LINCROFT...HIGHLANDS...FARMINGDALE...EAST
  FREEHOLD...BELMAR AND ASBURY PARK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.  
DO NOT ATTEMPT TO CROSS SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN 
DEPTH BY FOOT OR BY AUTOMOBILE.

&&

LAT...LON 3975 7409 3975 7412 3977 7415 3977 7412
      3980 7413 3982 7410 3991 7409 3975 7418
      3975 7456 3984 7445 4006 7459 4044 7409
      4041 7400 4047 7402 4047 7399 4041 7396
      4032 7396

$$

KRUZDLO

2 follow-up statements

000 
WGUS71 KPHI 312347
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
747 PM EDT FRI JUL 31 2009

NJC005-025-029-010130-
/O.CON.KPHI.FF.W.0027.000000T0000Z-090801T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONMOUTH NJ-OCEAN NJ-BURLINGTON NJ-
747 PM EDT FRI JUL 31 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR EAST
CENTRAL BURLINGTON...OCEAN AND MONMOUTH COUNTIES...

ALTHOUGH THE HEAVY RAIN HAS MOVED TO THE EAST, FLASH FLOODING IS 
STILL OCCURRING IN THE TOMS RIVER AREA. 

THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM.

LAT...LON 3975 7409 3975 7412 3977 7415 3977 7412
      3980 7413 3982 7410 3991 7409 3975 7418
      3975 7456 3984 7445 4006 7459 4044 7409
      4041 7400 4047 7402 4047 7399 4041 7396
      4032 7396

$$

KRUZDLO

000 
WGUS71 KPHI 010110
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
910 PM EDT FRI JUL 31 2009

NJC005-025-029-010118-
/O.CAN.KPHI.FF.W.0027.000000T0000Z-090801T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONMOUTH NJ-OCEAN NJ-BURLINGTON NJ-
910 PM EDT FRI JUL 31 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EAST CENTRAL
BURLINGTON...OCEAN AND MONMOUTH COUNTIES...

THE HEAVY RAIN RESPONSIBLE FOR THE FLASH FLOODING THAT OCCURRED 
EARLIER THIS EVENING HAS MOVED TO THE EAST. 

THE FLASH FLOOD WARNING HAS BEEN CANCELLED.

LAT...LON 3975 7409 3975 7412 3977 7415 3977 7412
      3980 7413 3982 7410 3991 7409 3975 7418
      3975 7456 3984 7445 4006 7459 4044 7409
      4041 7400 4047 7402 4047 7399 4041 7396
      4032 7396

$$

KRUZDLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 2:13 PM EDT	Flash Flood Warning	PHI	Sussex	4 hr
Jul 31, 2:36 PM EDT	Flash Flood Warning	PHI	Hunterdon, Morris, Sussex, Warren	4 hr
Jul 31, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Gloucester, Salem	57 min
Jul 31, 4:08 PM EDT	Flash Flood Warning	PHI	Burlington, Camden, Gloucester, Salem	3 hr
Jul 31, 4:23 PM EDT	Special Marine Warning	PHI		67 min
Jul 31, 4:31 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Gloucester, Salem	59 min
Jul 31, 4:39 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 2 more	96 min
Jul 31, 4:56 PM EDT	Flash Flood Warning	PHI	Hunterdon, Mercer, Middlesex, Monmouth, Morris, Somerset	114 min
Jul 31, 5:07 PM EDT	Flash Flood Warning	PHI	Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem	3 hr
Jul 31, 5:10 PM EDT	Tornado Warning	PHI	Burlington, Ocean	21 min
Jul 31, 5:14 PM EDT	Special Marine Warning	PHI		2 hr
Jul 31, 5:15 PM EDT	Severe Thunderstorm Warning	PHI	Atlantic, Ocean	60 min
Jul 31, 5:16 PM EDT	Special Marine Warning	PHI		119 min
Jul 31, 5:48 PM EDT	Areal Flood Advisory	PHI	Atlantic, Burlington, Cape May, Cumberland, Ocean	3 hr

Nearby

Flash Flood Warnings in New Jersey, 2009 Every 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.