Alert archive / New Jersey / Flood Watches in 2012
Flood Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flood watch at Apr 21, 2012, 3:15 PM EDT for Delaware County, Philadelphia County, Pennsylvania; New Castle County, Delaware; 5 counties in New Jersey. It took effect at Apr 22, 2012, 8:00 AM EDT. It was in force for 20 hr.
The area
The counties it named.
The facts
- Issued
- Apr 21, 2012, 3:15 PM EDT (19:15 UTC)
- In effect from
- Apr 22, 2012, 8:00 AM EDT
- Expired
- Apr 23, 2012, 3:37 AM EDT
- In force
- 20 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties New Castle County, DE, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Somerset County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 19:17 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, 7.3 hours before the alert went out and 185 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
- 718 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
813 WGUS61 KPHI 211915 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 315 PM EDT SAT APR 21 2012 DEZ001-NJZ008>010-012-015-PAZ067>071-221000- /O.NEW.KPHI.FA.A.0001.120422T1200Z-120423T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...TRENTON...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 315 PM EDT SAT APR 21 2012 ...FLOOD WATCH IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...HUNTERDON... MERCER...MIDDLESEX...MORRIS AND SOMERSET. IN SOUTHEAST PENNSYLVANIA...BUCKS...CHESTER...DELAWARE...MONTGOMERY AND PHILADELPHIA. * FROM SUNDAY MORNING THROUGH LATE SUNDAY NIGHT * HEAVY RAIN IS EXPECTED TO FALL ACROSS THE REGION SUNDAY INTO SUNDAY EVENING. EVENT RAINFALL TOTALS OF 2.0 TO 3.5 INCHES ARE EXPECTED...WITH THE HIGHEST AMOUNTS ACROSS PORTIONS OF NORTHERN NEW JERSEY. EVEN THOUGH WE HAVE DRY DRY LATELY...THIS MUCH RAIN COULD RESULT IN FLOODING OF QUICK RESPONDING STREAMS AND SMALL RIVERS...SUCH AS THOSE IN NORTHERN DELAWARE AND SOUTHEAST PENNSYLVANIA. IN ADDITION...URBAN FLOODING FLOODING IS POSSIBLE. * AT THIS TIME...MAINSTEM RIVER FLOODING IS NOT EXPECTED. HOWEVER...IF MORE THAN 3.5 INCHES OF RAIN FALLS IN THE PASSAIC BASIN...MAINSTEM RIVER FLOODING BECOMES POSSIBLE. 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. && $$ HAYES
4 follow-up statements
344 WGUS61 KPHI 220816 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 416 AM EDT SUN APR 22 2012 DEZ001-NJZ008>010-012-015-PAZ067>071-222215- /O.CON.KPHI.FA.A.0001.120422T1200Z-120423T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...TRENTON...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 416 AM EDT SUN APR 22 2012 ...FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT... THE FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...HUNTERDON...MERCER... MIDDLESEX...MORRIS AND SOMERSET. IN SOUTHEAST PENNSYLVANIA... BUCKS...CHESTER...DELAWARE...MONTGOMERY AND PHILADELPHIA. * FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT * HEAVY RAIN IS EXPECTED TO FALL ACROSS THE REGION STARTING LATER TODAY AND CONTINUING INTO TONIGHT. EVENT RAINFALL TOTALS OF 2.0 TO 3.5 INCHES ARE EXPECTED...WITH THE HIGHEST AMOUNTS ACROSS PORTIONS OF NORTHERN NEW JERSEY. EVEN THOUGH WE HAVE DRY DRY LATELY...THIS MUCH RAIN COULD RESULT IN FLOODING OF QUICK RESPONDING STREAMS AND SMALL RIVERS...SUCH AS THOSE IN NORTHERN DELAWARE AND SOUTHEAST PENNSYLVANIA. IN ADDITION...URBAN FLOODING FLOODING IS POSSIBLE. * AT THIS TIME...MAINSTEM RIVER FLOODING IS NOT EXPECTED. HOWEVER...IF MORE THAN 3.5 INCHES OF RAIN FALLS IN THE PASSAIC BASIN...MAINSTEM RIVER FLOODING BECOMES POSSIBLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$
553 WGUS61 KPHI 220823 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 423 AM EDT SUN APR 22 2012 DEZ001-NJZ008>010-012-015-PAZ067>071-222230- /O.CON.KPHI.FA.A.0001.120422T1200Z-120423T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...TRENTON...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 423 AM EDT SUN APR 22 2012 ...FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT... THE FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...HUNTERDON...MERCER... MIDDLESEX...MORRIS AND SOMERSET. IN SOUTHEAST PENNSYLVANIA... BUCKS...CHESTER...DELAWARE...MONTGOMERY AND PHILADELPHIA. * FROM 8 AM EDT THIS MORNING THROUGH LATE TONIGHT * HEAVY RAIN IS EXPECTED TO FALL ACROSS THE REGION STARTING LATER TODAY AND CONTINUING INTO TONIGHT. EVENT RAINFALL TOTALS OF 2.0 TO 3.5 INCHES ARE EXPECTED...WITH THE HIGHEST AMOUNTS ACROSS PORTIONS OF NORTHERN NEW JERSEY. EVEN THOUGH WE HAVE BEEN VERY DRY LATELY...THIS MUCH RAIN COULD RESULT IN FLOODING OF QUICK RESPONDING STREAMS AND SMALL RIVERS...SUCH AS THOSE IN NORTHERN DELAWARE AND SOUTHEAST PENNSYLVANIA. IN ADDITION... URBAN FLOODING FLOODING IS POSSIBLE. * AT THIS TIME...MAINSTEM RIVER FLOODING IS NOT EXPECTED. HOWEVER...IF MORE THAN 3.5 INCHES OF RAIN FALLS IN THE PASSAIC BASIN...MAINSTEM RIVER FLOODING BECOMES POSSIBLE. 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. && $$
830 WGUS61 KPHI 221933 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 333 PM EDT SUN APR 22 2012 DEZ001-NJZ008>010-012-015-PAZ067>071-230800- /O.CON.KPHI.FA.A.0001.000000T0000Z-120423T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...TRENTON...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 333 PM EDT SUN APR 22 2012 ...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT... THE FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...HUNTERDON...MERCER... MIDDLESEX...MORRIS AND SOMERSET. IN SOUTHEAST PENNSYLVANIA... BUCKS...CHESTER...DELAWARE...MONTGOMERY AND PHILADELPHIA. * THROUGH LATE TONIGHT * HEAVY RAIN IS EXPECTED FROM LATE THIS AFTERNOON TO THE EARLY PORTION OF MONDAY MORNING. EVENT RAINFALL TOTALS OF 2 TO 3 INCHES ARE EXPECTED...WITH THE HIGHEST AMOUNTS ACROSS PORTIONS OF NORTHERN NEW JERSEY. EVEN THOUGH WE HAVE BEEN VERY DRY LATELY...THIS MUCH RAIN COULD RESULT IN FLOODING OF QUICK RESPONDING STREAMS AND SMALL RIVERS...SUCH AS THOSE IN NORTHERN DELAWARE AND SOUTHEAST PENNSYLVANIA. IN ADDITION...URBAN FLOODING FLOODING IS POSSIBLE. * AT THIS TIME...MAINSTEM RIVER FLOODING IS NOT EXPECTED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$
315 WGUS61 KPHI 230737 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 337 AM EDT MON APR 23 2012 DEZ001-NJZ008>010-012-015-PAZ067>071-230845- /O.CAN.KPHI.FA.A.0001.000000T0000Z-120423T0800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-MERCER-CHESTER- MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...NEW BRUNSWICK...TRENTON...WEST CHESTER... NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 337 AM EDT MON APR 23 2012 ...FLOOD WATCH IS CANCELLED... THE FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA HAS BEEN CANCELLED. THE WIDESPREAD RAIN HAS MOVED NORTH OF THE AREA EARLY THIS MORNING. WHILE SOME RUNOFF WILL CONTINUE EARLY THIS MORNING, THE THREAT FOR FLOODING HAS DIMINISHED. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 5:14 PM EDT | Special Weather Statement | PHI | Berks | 61 min |
| Apr 21, 7:19 PM EDT | Special Weather Statement | PHI | Chester, Lehigh, Monroe, Montgomery, Northampton | 116 min |
| Apr 21, 3:31 AM EDT | Gale Watch | PHI | 13 hr | |
| Apr 21, 3:31 AM EDT | Small Craft Advisory | PHI | 22 hr | |
| Apr 21, 4:04 PM EDT | Gale Warning | PHI | 36 hr | |
| Apr 21, 6:55 PM EDT | Special Weather Statement | PHI | Sussex | 65 min |
Nearby
Flood Watches in New Jersey, 2012Flood Watches in Pennsylvania, 2012Flood Watches in Delaware, 2012Every flood watch in 2012
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.