Alert archive / New Jersey / Flood Watches in 2011
Flood Watch 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flood watch at Apr 27, 2011, 3:30 AM EDT for 4 counties in New Jersey. It took effect at Apr 28, 2011, 10:00 AM EDT. It was in force for .
The area
The counties it named.
The facts
- Issued
- Apr 27, 2011, 3:30 AM EDT (07:30 UTC)
- In effect from
- Apr 28, 2011, 10:00 AM EDT
- Expired
- Apr 27, 2011, 3:26 PM EDT
- In force
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 67 km from the middle of the area, began a volume at 07:34 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, 7.5 hours before the alert went out and 148 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
- 15 J/kg
- Mixed-layer CIN
- -252 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
437 WGUS61 KPHI 270730 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 330 AM EDT WED APR 27 2011 ...HEAVY RAIN AT TIMES THURSDAY MAY LEAD TO FLOODING ON AREA STREAMS AND PERHAPS THE LARGER RIVERS AS WELL... .A SLOW-MOVING COLD FRONT WILL MOVE THROUGH THE AREA THURSDAY... AND MAY CAUSE A PERIOD OF HEAVY RAIN ESPECIALLY FROM LATE MORNING AND THROUGH THURSDAY AFTERNOON. NJZ008-010-012-015-272100- /O.NEW.KPHI.FA.A.0007.110428T1400Z-110429T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORRIS-SOMERSET-MIDDLESEX-MERCER- INCLUDING THE CITIES OF...MORRISTOWN...SOMERVILLE... NEW BRUNSWICK...TRENTON 330 AM EDT WED APR 27 2011 ...FLOOD WATCH IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLOOD WATCH FOR PORTIONS OF CENTRAL NEW JERSEY AND NORTHERN NEW JERSEY...INCLUDING THE FOLLOWING AREAS...IN CENTRAL NEW JERSEY...MERCER. IN NORTHERN NEW JERSEY...MIDDLESEX...MORRIS AND SOMERSET. * FROM LATER THURSDAY MORNING INTO THURSDAY EVENING. * RAINFALL TOTALS AROUND 1 INCH ARE EXPECTED...WITH LOCAL AMOUNTS OF 1.5 TO 2 INCHES. * THIS RAINFALL MAY LEAD TO FLOODING ON STREAMS AND CREEKS...AS WELL AS FLOODING OF ROADS, HIGHWAYS, AND AREAS OF POOR DRAINAGE. SOME FLOODING OF THE LARGER RIVERS MAY FOLLOW. 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. && $$
1 follow-up statement
794 WGUS61 KPHI 271926 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 326 PM EDT WED APR 27 2011 ...VERY HEAVY DOWNPOURS AT TIMES THURSDAY... .A COLD FRONT WILL SWEEP ACROSS THE AREA DURING THURSDAY WITH SHOWERS AND THUNDERSTORMS ACCOMPANYING IT. SOME OF THE STORMS MAY PRODUCE LOCALLY VERY HEAVY RAINFALL, WHICH COULD LEAD TO FLASH FLOODING. NJZ008-010-012-015-280800- /O.CAN.KPHI.FA.A.0007.110428T1400Z-110429T0200Z/ /O.NEW.KPHI.FF.A.0001.110428T1400Z-110429T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MORRIS-SOMERSET-MIDDLESEX-MERCER- INCLUDING THE CITIES OF...MORRISTOWN...SOMERVILLE... NEW BRUNSWICK...TRENTON 326 PM EDT WED APR 27 2011 ...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... ...FLOOD WATCH IS CANCELLED... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF CENTRAL NEW JERSEY AND NORTHERN NEW JERSEY...INCLUDING THE FOLLOWING AREAS...IN CENTRAL NEW JERSEY...MERCER. IN NORTHERN NEW JERSEY... MIDDLESEX...MORRIS AND SOMERSET. * FROM THURSDAY MORNING THROUGH THURSDAY EVENING. * SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A STRONG COLD FRONT ON THURSDAY HAVE THE POTENTIAL TO PRODUCE ONE INCH OR MORE OF RAINFALL IN A SHORT PERIOD OF TIME. THE GROUND REMAINS SATURATED AND ANY ADDITIONAL HEAVY DOWNPOURS IN A SHORT PERIOD OF TIME COULD LEAD TO AREAS OF FLASH FLOODING. * THE QUICK HEAVY DOWNPOURS MAY LEAD TO FLASH FLOODING ON RIVERS AND CREEKS, AS WELL AS ON ROADWAYS AND AREAS OF POOR DRAINAGE. QUICK RESPONDING RIVERS AND SMALL STREAMS ALSO HAVE THE POTENTIAL TO EXCEED BANKFULL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLASH FLOOD WATCH MEANS THAT CONDITIONS MAY DEVELOP THAT LEAD TO FLASH FLOODING. FLASH FLOODING IS A VERY DANGEROUS SITUATION. YOU SHOULD MONITOR LATER FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. $$ NJZ001-007-009-PAZ054-055-061-062-280800- /O.NEW.KPHI.FF.A.0001.110428T1400Z-110429T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-HUNTERDON-CARBON-MONROE-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...FLEMINGTON... JIM THORPE...STROUDSBURG...ALLENTOWN...BETHLEHEM...EASTON 326 PM EDT WED APR 27 2011 ...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY MORNING THROUGH THURSDAY EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY... HUNTERDON...SUSSEX AND WARREN. IN PENNSYLVANIA...CARBON... LEHIGH...MONROE AND NORTHAMPTON. * FROM THURSDAY MORNING THROUGH THURSDAY EVENING. * SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A STRONG COLD FRONT ON THURSDAY HAVE THE POTENTIAL TO PRODUCE ONE INCH OR MORE OF RAINFALL IN A SHORT PERIOD OF TIME. THE GROUND IS SATURATED AND ANY HEAVY DOWNPOURS IN A SHORT PERIOD OF TIME COULD LEAD TO AREAS OF FLASH FLOODING. * THE QUICK HEAVY DOWNPOURS MAY LEAD TO FLASH FLOODING ON RIVERS AND CREEKS, AS WELL AS ON ROADWAYS AND AREAS OF POOR DRAINAGE. QUICK RESPONDING RIVERS AND SMALL STREAMS ALSO HAVE THE POTENTIAL TO EXCEED BANKFULL. 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. && $$ GORSE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 9:25 PM EDT | Marine Dense Fog Advisory | PHI | 6 hr | |
| Apr 27, 12:08 AM EDT | Special Weather Statement | PHI | Morris, Sussex, Warren | 67 min |
| Apr 27, 12:34 AM EDT | Severe Thunderstorm Warning | PHI | Morris, Sussex, Warren | 56 min |
| Apr 27, 12:43 AM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 62 min |
| Apr 27, 1:19 AM EDT | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Somerset | 56 min |
| Apr 27, 3:25 AM EDT | Special Weather Statement | PHI | Hunterdon, Morris | 65 min |
| Apr 27, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 44 min |
| Apr 27, 3:26 PM EDT | Flash Flood Watch | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 24 hr |
| Apr 27, 3:29 PM EDT | Special Weather Statement | PHI | Morris, Somerset | 61 min |
| Apr 27, 3:39 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset, Sussex | 66 min |
| Apr 27, 4:16 PM EDT | Special Weather Statement | PHI | Salem | 59 min |
| Apr 27, 4:43 PM EDT | Special Weather Statement | PHI | Camden, Cumberland, Gloucester, Salem | 62 min |
| Apr 27, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 36 min |
| Apr 27, 4:50 PM EDT | Special Marine Warning | PHI | 12 min | |
| Apr 27, 5:22 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester | 83 min |
Nearby
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.