Alert archive / New Jersey / Areal Flood Warnings in 2011

Areal Flood Warning 7, NWS Philadelphia/Mount Holly

March 6, 2011Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this areal flood warning at Mar 6, 2011, 10:21 PM EST for Somerset County, New Jersey. It was in force for 24 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
Mar 6, 2011, 10:21 PM EST (03:21 UTC)
Expired
Mar 7, 2011, 10:15 PM EST
In force
24 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon
Flood severity
None

County Somerset County, NJ

The radar

The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 03:22 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

Brookhaven, NY (KOKX), launched 00:00Z, 3.4 hours before the alert went out and 157 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, Brookhaven, NY at 00:00Z on 2011-03-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 49 joules per kilogram.LCLLFCEL10008507005003002001001 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, Brookhaven, NY at 00:00Z on 2011-03-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 272 square meters per square second.1939587897Sfc1 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
49 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
489 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
272 m²/s²
0-3 km storm-relative helicity
371 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.

246 
WGUS41 KPHI 070321
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1021 PM EST SUN MAR 6 2011

NJC035-070915-
/O.NEW.KPHI.FA.W.0007.110307T0321Z-110307T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
1021 PM EST SUN MAR 6 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLOOD WARNING FOR SMALL STREAMS IN...
  SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 415 AM EST

* AT 1017 PM EST...THE ONE TO TWO INCHES OF RAIN THAT HAVE FALLEN 
ACROSS THE REGION HAVE PUSHED PIKE RUN AT BELLE MEAD AND THE NORTH 
BRANCH RARITAN RIVER AT SOUTH BRANCH ABOVE FLOOD STAGE. THE 
MILLSTONE RIVER AT GRIGGSTOWN IS ALSO ABOVE CAUTION STAGE AND IS 
RISING QUICKLY.

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO
FLOODING WHEN WATER BEGINS RISING.

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 4044 7452 4042 7457 4037 7462 4039 7465
      4037 7473 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4056 7455 4050 7447

$$

KRUZDLO
4 follow-up statements
184 
WGUS41 KPHI 070844
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
344 AM EST MON MAR 7 2011

NJC035-071315-
/O.EXT.KPHI.FA.W.0007.000000T0000Z-110307T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
344 AM EST MON MAR 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLOOD WARNING FOR SMALL STREAMS IN...
  SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 815 AM EST

* AT 339 AM EST...THE ONE AND A HALF TO TWO AND A HALF INCHES OF 
RAIN THAT HAVE FALLEN ACROSS THE REGION HAVE PUSHED THE NORTH BRANCH 
RARITAN RIVER AT BOTH NORTH BRANCH AND SOUTH BRANCH OVER FLOOD 
STAGE. GRIGGSTOWN ON THE MILLSTONE IS ALSO ABOVE FLOOD STAGE. 
BLACKWELLS MILLS ON THE MILLSTONE IS RISING.

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN 
REPORTED. STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT 
EXPECTED. HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY 
PRECAUTIONS IMMEDIATELY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO
HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO
FLOODING WHEN WATER BEGINS RISING.

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 4044 7452 4042 7457 4037 7462 4039 7465
      4037 7473 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4056 7455 4050 7447

$$

KRUZDLO
590 
WGUS41 KPHI 071310
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
810 AM EST MON MAR 7 2011

NJC035-071915-
/O.EXT.KPHI.FA.W.0007.000000T0000Z-110307T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
810 AM EST MON MAR 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLOOD WARNING FOR SMALL STREAMS IN...
  SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 215 PM EST MONDAY

* AT 806 AM EST...SMALL STREAMS WERE STILL RUNNING HIGH IN RESPONSE  
  TO UP TO 3 INCHES OF RAIN WHICH FELL OVER THE AREA ON SUNDAY. THE  
  MILLSTONE RIVER AT BLACKWELLS MILLS IS STILL RISING AS WELL. WITH  
  MINOR FLOODING STILL A THREAT...THE FLOOD WARNING FOR SMALL        
  STREAMS IN SOUTHERN SOMERSET COUNTY HAS BEEN EXTENDED INTO THIS    
  AFTERNOON.

A FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR HAS BEEN REPORTED.
STREAM RISES WILL BE SLOW AND FLASH FLOODING IS NOT EXPECTED.
HOWEVER...ALL INTERESTED PARTIES SHOULD TAKE NECESSARY PRECAUTIONS
IMMEDIATELY.

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. MOVE TO HIGHER GROUND.

&&

LAT...LON 4044 7452 4042 7457 4037 7462 4039 7465
      4037 7473 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4056 7455 4050 7447

$$

JJM
992 
WGUS41 KPHI 071903
FLWPHI

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
203 PM EST MON MAR 7 2011

NJC035-080315-
/O.EXT.KPHI.FA.W.0007.000000T0000Z-110308T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
203 PM EST MON MAR 7 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS EXTENDED THE

* FLOOD WARNING FOR SMALL STREAMS IN...
  SOUTHERN SOMERSET COUNTY IN NORTHERN NEW JERSEY...

* UNTIL 1015 PM EST

* AT 200 PM EST..THE STAGE OF THE MILLSTONE RIVER AT GRIGGSTOWN WAS  
  13.2 FEET AND STEADY. FLOOD STAGE AT GRIGGSTOWN IS 10 FEET. SINCE  
  MINOR FLOODING IS STILL OCCURING ALONG THE UPPER REACHES OF THE    
  MILLSTONE RIVER...THE FLOOD WARNING HAS BEEN EXTENDED INTO LATE    
  THIS EVENING. 

A FLOOD WARNING MEANS THAT FLOODING IS OCCURRING. 

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 4044 7452 4042 7457 4037 7462 4039 7465
      4037 7473 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4056 7455 4050 7447

$$

JJM
500 
WGUS81 KPHI 080300
FLSPHI

FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1000 PM EST MON MAR 7 2011

NJC035-080315-
/O.CON.KPHI.FA.W.0007.000000T0000Z-110308T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SOMERSET NJ-
1000 PM EST MON MAR 7 2011

...THE FLOOD WARNING FOR SMALL STREAMS IN SOUTHERN SOMERSET COUNTY
WILL BE ALLOWED TO EXPIRE AT 1015 PM...

SMALL STREAMS IN THE AREA ARE BACK WITHIN BANKFULL. INFORMATION ABOUT
THE MILLSTONE RIVER AT GRIGGSTOWN CAN BE FOUND IN THE MILLSTONE 
RIVER FLOOD STATEMENT THAT INCLUDES BLACKWELLS MILLS.
 
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. MOVE TO HIGHER GROUND. SOME CAUSEWAYS ACROSS THE MILLSTONE 
RIVER REMAIN CLOSED.

&&

LAT...LON 4044 7452 4042 7457 4037 7462 4039 7465
      4037 7473 4050 7480 4050 7477 4054 7475
      4057 7471 4060 7473 4062 7471 4063 7473
      4064 7473 4056 7455 4050 7447

$$
 
TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 6, 7:03 PM ESTAreal Flood AdvisoryPHIBurlington4 hr
Mar 6, 7:08 PM ESTSpecial Weather StatementPHIMiddlesex, Somerset67 min
Mar 6, 7:11 PM ESTSpecial Weather StatementPHIAtlantic, Burlington, Ocean64 min
Mar 6, 8:02 PM ESTSpecial Weather StatementPHIMiddlesex, Monmouth, Ocean58 min
Mar 6, 8:38 PM ESTSpecial Weather StatementPHIMonmouth52 min
Mar 6, 9:30 PM ESTAreal Flood AdvisoryPHIBurlington, Camden, Gloucester, Mercer, Salem7 hr
Mar 6, 10:31 PM ESTAreal Flood AdvisoryPHIBurlington, Middlesex, Monmouth, Ocean6 hr
Mar 6, 10:40 PM ESTRiver Flood WarningPHIMorris, Passaic46 hr
Mar 6, 10:44 PM ESTRiver Flood WarningPHIBergen, Morris, Passaic39 hr
Mar 6, 10:50 PM ESTRiver Flood WarningPHIMorris, Passaic43 hr
Mar 6, 11:45 PM ESTAreal Flood AdvisoryPHISussex, Warren6 hr
Mar 7, 1:01 AM ESTRiver Flood WarningPHIMorris43 hr
Mar 7, 1:01 AM ESTRiver Flood WarningPHIMorris7 days
Mar 7, 4:03 AM ESTRiver Flood WarningPHISomerset6 hr
Mar 7, 4:03 AM ESTRiver Flood WarningPHIMiddlesex, Somerset17 hr
Mar 7, 4:03 AM ESTRiver Flood WarningPHIMiddlesex, Somerset17 hr
Mar 7, 4:10 AM ESTRiver Flood WarningPHIEssex, Morris, Passaic41 days
Mar 7, 4:10 AM ESTRiver Flood WarningPHIEssex, Passaic41 days
Mar 7, 4:46 AM ESTAreal Flood WarningPHISussex, Warren14 hr
Mar 7, 8:52 AM ESTRiver Flood WarningPHIHunterdon, Warren17 hr
Mar 7, 8:52 AM ESTRiver Flood WarningPHIHunterdon, Mercer17 hr
Mar 7, 8:55 AM ESTRiver Flood WarningPHISussex, Warren11 hr
Mar 7, 9:28 AM ESTRiver Flood WarningPHISomerset19 hr
Mar 7, 6:19 PM ESTAreal Flood WarningPHISussex, Warren5 hr

Nearby

Areal Flood Warnings in New Jersey, 2011Every areal flood warning in 2011

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.