Alert archive / New Jersey / Flash Flood Warnings in 2009
Flash Flood Warning 18, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 29, 2009, 2:50 PM EDT for Middlesex 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
- Jul 29, 2009, 2:50 PM EDT (18:50 UTC)
- Expired
- Jul 29, 2009, 6:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
County Middlesex County, NJ
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 18:52 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 29, 6:20 PM EDT | FLOOD | Carteret, NJ | ROADWAY CLOSURES, HOUSES INUNDATED WITH WATER, DEPTH UNKNOWN. |
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, 6.8 hours before the alert went out and 130 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
- 594 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS51 KPHI 291850 FFWPHI NJC023-292245- /O.NEW.KPHI.FF.W.0018.090729T1850Z-090729T2245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 250 PM EDT WED JUL 29 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY... THIS INCLUDES THE CITIES OF...PERTH AMBOY...NEW BRUNSWICK... * UNTIL 645 PM EDT * AT 247 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SOCIETY HILL...MIDDLESEX...EDISON...COLONIA AND CARTERET PRECAUTIONARY/PREPAREDNESS ACTIONS... TOTAL RAINFALL AMOUNTS OF TWO TO THREE INCHES ARE POSSIBLE IN THE WARNED AREA. 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. MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN. && LAT...LON 4055 7424 4046 7OOD WATCH NATIONAL WEATHER SERVICE BINGHAMTON NY 250 PM EDT WED JUL 29 2009 NYZ045-046-056-057-062-PAZ039-040-043-044-047-048-072-300100- /O.NEW.KBGM.FF.A.0005.090729T1900Z-090730T0100Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ CHENANGO-OTSEGO-BROOME-DELAWARE-SULLIVAN-SUSQUEHANNA- NORTHERN WAYNE-WYOMING-LACKAWANNA-LUZERNE-PIKE-SOUTHERN WAYNE- INCLUDING THE CITIES OF...NORWICH...ONEONTA...COOPERSTOWN... BINGHAMTON...WALTON...DELHI...MONTICELLO...MONTROSE... TUNKHANNOCK...SCRANTON...WILKES-BARRE...HAZLETON...MILFORD... HONESDALE 250 PM EDT WED JUL 29 2009 ...FLASH FLOOD WATCH IN EFFECT UNTIL 9 PM EDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN BINGHAMTON HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NEW YORK AND NORTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING COUNTIES...IN NEW YORK...BROOME...CHENANGO...DELAWARE...OTSEGO AND SULLIVAN. IN NORTHEAST PENNSYLVANIA...LACKAWANNA...LUZERNE...NORTHERN WAYNE...PIKE...SOUTHERN WAYNE...SUSQUEHANNA AND WYOMING. * UNTIL 9 PM EDT THIS EVENING LOW PRESSURE OVER NORTHWEST PENNSYLVANIA WILL SLOWLY MOVE OVER CENTRAL NEW YORK BY EARLY TONIGHT. THIS SYSTEM WILL PRODUCE RAIN...HEAVY AT TIMES ACROSS THE WATCH AREA THROUGH LATE TONIGHT. NATIONAL WEATHER SERVICE DOPPLER RADAR HAS ESTIMATED THAT AN AREA OF RAIN WITH EMBEDDED THUNDER OUT AHEAD OF THE MAIN LOW HAS ALREADY PRODUCED BETWEEN 1 AND 2 INCHES OF RAINFALL IN THE WATCH AREA. AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE THROUGH THIS EVENING IN THE WATCH AREA AS THE AREA OF LOW PRESSURE MOVES THROUGH. THIS AMOUNT OF PRECIPITATION IS NOT EXPECTED TO CAUSE MAIN STEM RIVER FLOODING BUT LOCALIZED FLASH FLOODING OF SMALL STREAMS AND CREEKS ALONG WITH URBAN AREAS IS POSSIBLE. 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. && $$ HEDEN
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 10:15 AM EDT | Flash Flood Watch | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 17 hr |
| Jul 29, 12:55 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Mercer, Somerset | 65 min |
| Jul 29, 1:30 PM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 3 hr |
| Jul 29, 1:35 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Somerset | 55 min |
| Jul 29, 1:56 PM EDT | Severe Thunderstorm Warning | PHI | Sussex | 64 min |
| Jul 29, 2:10 PM EDT | Tornado Warning | PHI | Sussex | 65 min |
| Jul 29, 2:21 PM EDT | Areal Flood Advisory | PHI | Middlesex | 3 hr |
| Jul 29, 2:32 PM EDT | Flash Flood Warning | PHI | Sussex | 6 hr |
| Jul 29, 3:52 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 4 hr |
| Jul 29, 5:09 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Mercer | 66 min |
| Jul 29, 5:48 PM EDT | Special Marine Warning | PHI | 57 min | |
| Jul 29, 5:55 PM EDT | Areal Flood Advisory | PHI | Burlington, Camden, Gloucester, Mercer, Middlesex, Salem | 4 hr |
| Jul 29, 6:11 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland | 26 min |
| Jul 29, 6:26 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Camden, Gloucester | 38 min |
| Jul 29, 6:42 PM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Mercer and 4 more | 3 hr |
| Jul 29, 6:42 PM EDT | Severe Thunderstorm Warning | PHI | Atlantic, Burlington, Camden | 39 min |
| Jul 29, 6:44 PM EDT | Flash Flood Warning | PHI | Middlesex, Somerset | 3 hr |
| Jul 29, 6:50 PM EDT | Areal Flood Advisory | PHI | Morris | 94 min |
| Jul 29, 7:31 PM EDT | Severe Thunderstorm Warning | PHI | Middlesex, Monmouth | 30 min |
Nearby
Flash Flood Warnings in New Jersey, 2009Every 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.