Alert archive / New Jersey / Flood Watches in 2011

Flood Watch 5, NWS Philadelphia/Mount Holly

March 15, 2011Morris County, New Jersey

NWS Philadelphia/Mount Holly issued this flood watch at Mar 15, 2011, 3:30 PM EDT for Morris County, New Jersey. It took effect at Mar 16, 2011, 12:00 AM EDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Mar 15, 2011, 3:30 PM EDT (19:30 UTC)
In effect from: Mar 16, 2011, 12:00 AM EDT
Expired: Mar 16, 2011, 10:35 AM EDT
In force: 11 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: None

County Morris County, NJ

The radar

The Philadelphia radar (KDIX), 102 km from the middle of the area, began a volume at 19:35 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 12:00Z, 7.5 hours before the alert went out and 141 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 616 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 85 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.

561 
WGUS61 KPHI 151930
FFAPHI

URGENT - IMMEDIATE BROADCAST REQUESTED
FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
330 PM EDT TUE MAR 15 2011

NJZ008-161000-
/O.NEW.KPHI.FA.A.0005.110316T0400Z-110316T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORRIS-
INCLUDING THE CITY OF...MORRISTOWN
330 PM EDT TUE MAR 15 2011

...FLOOD WATCH IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH
WEDNESDAY AFTERNOON...

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A

* FLOOD WATCH FOR A PORTION OF NORTHERN NEW JERSEY...INCLUDING 
 THE FOLLOWING AREA...MORRIS.

* FROM MIDNIGHT EDT TONIGHT THROUGH WEDNESDAY AFTERNOON

* RAINFALL AMOUNTS OF A HALF INCH TO ONE INCH ARE POSSIBLE DURING    
  THE WATCH PERIOD. RAIN WILL SPREAD INTO THE REGION DURING THE      
  OVERNIGHT HOURS AND CONTINUE TO FALL THROUGH THE MID AFTERNOON     
  HOURS. DEVELOPING LOW PRESSURE ALONG A COLD FRONT COULD ENHANCE    
  RAINFALL RATES TOMORROW MORNING.

* FLOODING IS ALREADY OCCURRING ON PORTIONS OF THE PASSAIC RIVER AND 
  WILL REMAIN THAT WAY THROUGH LATER THIS WEEK. RENEWED RISES ARE    
  EXPECTED EVERYWHERE IN THE PASSAIC BASIN TOMORROW, BUT IT APPEARS
  PORTIONS OF THE ROCKAWAY AND PEQUANNOCK RIVERS COULD SEE WATER     
  LEVELS EXCEED FLOOD STAGE ONCE AGAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.

YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.

&&

$$

KRUZDLO

2 follow-up statements

669 
WGUS61 KPHI 160845
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
445 AM EDT WED MAR 16 2011

NJZ008-162000-
/O.CON.KPHI.FA.A.0005.000000T0000Z-110316T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORRIS-
INCLUDING THE CITY OF...MORRISTOWN
445 AM EDT WED MAR 16 2011

...FLOOD WATCH REMAINS IN EFFECT THROUGH THIS AFTERNOON...

THE FLOOD WATCH CONTINUES FOR

* A PORTION OF NORTHERN NEW JERSEY...INCLUDING THE FOLLOWING 
  AREA...MORRIS.

* THROUGH THIS AFTERNOON

* RAINFALL AMOUNTS OF A HALF INCH TO ONE INCH ARE POSSIBLE DURING
  THE WATCH PERIOD. RAIN WILL CONTINUE TO FALL THROUGH THE LATE
  MORNING OR EARLY AFTERNOON HOURS. 

* FLOODING IS ALREADY OCCURRING ON PORTIONS OF THE PASSAIC RIVER
  AND WILL REMAIN THAT WAY THROUGH LATER THIS WEEK. RENEWED RISES
  ARE EXPECTED EVERYWHERE IN THE PASSAIC BASIN... BUT IT APPEARS
  PORTIONS OF THE ROCKAWAY AND PEQUANNOCK RIVERS COULD SEE WATER
  LEVELS EXCEED FLOOD STAGE ONCE AGAIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.

YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.

&&

$$

229 
WGUS61 KPHI 161435
FFAPHI

FLOOD WATCH
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1035 AM EDT WED MAR 16 2011

NJZ008-161545-
/O.CAN.KPHI.FA.A.0005.000000T0000Z-110316T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MORRIS-
INCLUDING THE CITY OF...MORRISTOWN
1035 AM EDT WED MAR 16 2011

...FLOOD WATCH IS CANCELLED...

THE FLOOD WATCH FOR A PORTION OF NORTHERN NEW JERSEY HAS BEEN
CANCELLED. THE RAIN HAS ENDED ACROSS THE WATCH AREA AND NO NEW
FLOODING IS EXPECTED.

$$

GORSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 4:01 AM EDT	Small Craft Advisory	PHI		30 hr

Nearby

Flood Watches in New Jersey, 2011 Every flood watch 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.