Alert archive / New Jersey / Flash Flood Watches in 2009
Flash Flood Watch 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jun 18, 2009, 4:55 AM EDT for 4 counties in New Jersey. It took effect at Jun 18, 2009, 8:00 AM EDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Jun 18, 2009, 4:55 AM EDT (08:55 UTC)
- In effect from
- Jun 18, 2009, 8:00 AM EDT
- Expired
- Jun 18, 2009, 3:58 PM EDT
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Sussex County, NJ
The radar
The Philadelphia radar (KDIX), 90 km from the middle of the area, began a volume at 08:57 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
Albany, NY (KALY), launched 00:00Z, 8.9 hours before the alert went out and 224 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1668 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS61 KPHI 180855 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 455 AM EDT THU JUN 18 2009 NJZ001-008-010-012-190000- /O.NEW.KPHI.FF.A.0003.090618T1200Z-090619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-MORRIS-SOMERSET-MIDDLESEX- INCLUDING THE CITIES OF...NEWTON...MORRISTOWN...SOMERVILLE... NEW BRUNSWICK 455 AM EDT THU JUN 18 2009 ...FLASH FLOOD WATCH IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A FLASH FLOOD WATCH FOR A PORTION OF NORTHERN NEW JERSEY... INCLUDING THE FOLLOWING COUNTIES...MIDDLESEX...MORRIS...SOMERSET AND SUSSEX. FROM 8 AM EDT THIS MORNING THROUGH THIS EVENING SHOWERS AND THUNDERSTORMS WILL OCCUR. HEAVY RAIN IS POSSIBLE AT TIMES WITH RAINFALL AMOUNTS EXPECTED TO AVERAGE AROUND 1 1/2 INCHES. THIS WILL CAUSE A SIGNIFICANT RISE TO STREAM LEVELS AND FLOODING IS POSSIBLE. PARTICULARLY SUSCEPTABLE WILL BE THE RARITAN AND PASSAIC RIVER BASINS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ RPW
2 follow-up statements
000 WGUS61 KPHI 181521 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1121 AM EDT THU JUN 18 2009 NJZ001-008-010-012-190000- /O.CON.KPHI.FF.A.0003.000000T0000Z-090619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-MORRIS-SOMERSET-MIDDLESEX- INCLUDING THE CITIES OF...NEWTON...MORRISTOWN...SOMERVILLE... NEW BRUNSWICK 1121 AM EDT THU JUN 18 2009 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... THE FLASH FLOOD WATCH CONTINUES FOR * A PORTION OF NORTHERN NEW JERSEY...INCLUDING THE FOLLOWING AREAS...MIDDLESEX...MORRIS...SOMERSET AND SUSSEX. * UNTIL 8 PM EDT THIS EVENING * UP TO AN INCH OF RAIN FELL OVER THE WATCH AREA LATE LAST NIGHT AND EARLY THIS MORNING. RAIN HAD BECOME LIGHTER LATE THIS MORNING...AND COVERAGE HAD BECOME MORE SCATTERED IN NATURE. HOWEVER...CONTINUED SHOWER ACTIVITY IS EXPECTED TODAY. THAT ACTIVITY MAY BECOME MORE WIDESPREAD IN NATURE AND THUNDERSTORMS ALSO MAY DEVELOP. THE ATMOSPHERE IS VERY MOIST AND THAT MAY LEAD TO ADDITIONAL HEAVY DOWNPOURS...AND SO THE THREAT OF FLASH FLOODING HAS NOT YET ENDED. SMALLER STREAMS AND CREEKS AND POOR DRAINAGE AREAS WOULD BE MOST SUSCEPTIBLE TO FLASH FLOODING. LARGER RIVER BASINS LIKELY ARE NOT THREATENED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && $$ RPW/MPD
000 WGUS61 KPHI 181958 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 358 PM EDT THU JUN 18 2009 ...THE THREAT OF FLASH FLOODING HAS DIMINISHED... NJZ001-008-010-012-182100- /O.CAN.KPHI.FF.A.0003.000000T0000Z-090619T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-MORRIS-SOMERSET-MIDDLESEX- INCLUDING THE CITIES OF...NEWTON...MORRISTOWN...SOMERVILLE... NEW BRUNSWICK 358 PM EDT THU JUN 18 2009 ...FLASH FLOOD WATCH IS CANCELLED... ALTHOUGH SCATTERED SHOWERS WILL REMAIN POSSIBLE INTO THE EVENING HOURS, THE THREAT OF HEAVY RAIN AND FLASH FLOODING HAS DIMINISHED. WITH THIS IN MIND, THE FLASH FLOOD WATCH HAS BEEN CANCELLED. $$ KRUZDLO
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 11:40 AM EDT | Areal Flood Advisory | PHI | Monmouth | 3 hr |
| Jun 18, 2:53 PM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
Nearby
Flash Flood Watches in New Jersey, 2009Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.