Alert archive / New Jersey / Flash Flood Watches in 2013
Flash Flood Watch 6, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 23, 2013, 3:49 AM EDT for 8 counties in Pennsylvania; 13 counties in New Jersey; New Castle County, Delaware. It took effect at Jul 23, 2013, 6:00 AM EDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 23, 2013, 3:49 AM EDT (07:49 UTC)
- In effect from
- Jul 23, 2013, 6:00 AM EDT
- Expired
- Jul 23, 2013, 3:10 PM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
All 22 counties
New Castle County, DE, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 63 km from the middle of the area, began a volume at 07:50 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, 7.8 hours before the alert went out and 195 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
- 367 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 876 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
226 WGUS61 KPHI 230749 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 349 AM EDT TUE JUL 23 2013 ...POTENTIAL FOR ADDITIONAL HEAVY SHOWERS AND THUNDERSTORMS THROUGH TODAY... .ANOTHER WEATHER DISTURBANCE WILL MOVE ACROSS THE AREA MAINLY FROM MIDDAY AND INTO THIS EVENING. SHOWERS AND SCATTERED THUNDERSTORMS ARE EXPECTED TO REDEVELOP, WITH THE POTENTIAL FOR LOCALLY VERY HEAVY RAIN TO OCCUR. DEZ001-NJZ001-007>010-012-013-015>020-PAZ060>062-070-071-101>106- 232000- /O.NEW.KPHI.FF.A.0006.130723T1000Z-130724T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-OCEAN-BERKS-LEHIGH-NORTHAMPTON-DELAWARE- PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-WESTERN MONTGOMERY- EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...NEWTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...FREEHOLD... TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL... MOORESTOWN...MOUNT HOLLY...JACKSON...READING...ALLENTOWN... BETHLEHEM...EASTON...MEDIA...PHILADELPHIA...HONEY BROOK... OXFORD...WEST CHESTER...KENNET SQUARE...COLLEGEVILLE... POTTSTOWN...NORRISTOWN...LANSDALE...CHALFONT...PERKASIE... MORRISVILLE...DOYLESTOWN 349 AM EDT TUE JUL 23 2013 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NEW JERSEY...CAMDEN... GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX...MORRIS... NORTHWESTERN BURLINGTON...OCEAN...SALEM...SOMERSET...SUSSEX... WARREN AND WESTERN MONMOUTH. IN PENNSYLVANIA...BERKS... DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY...LEHIGH... LOWER BUCKS...NORTHAMPTON...PHILADELPHIA...UPPER BUCKS... WESTERN CHESTER AND WESTERN MONTGOMERY. * THROUGH THIS EVENING. * SEVERAL AREAS MONDAY AFTERNOON INTO EARLY THIS MORNING PICKED UP VERY HEAVY RAINFALL, ON THE ORDER OF 2 TO 6 INCHES. SOME ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO OCCUR DURING THE COURSE OF TODAY, SOME OF WHICH CAN PRODUCE LOCALLY VERY HEAVY RAIN IN A SHORT PERIOD OF TIME. * THE SATURATED GROUND COMBINED WITH TIMES OF ADDITIONAL HEAVY RAINFALL CAN RESULT IN SOME FLOODING OF ROADWAYS AND IN AREAS OF POOR DRAINAGE. IF ADDITIONAL HEAVY RAIN OCCURS OVER AN AREA THAT PREVIOUSLY PICKED UP VERY HEAVY RAINFALL, THE THREAT FOR FLASH FLOODING WILL INCREASE. 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. && $$ GORSE
2 follow-up statements
068 WGUS61 KPHI 231613 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1213 PM EDT TUE JUL 23 2013 ...POTENTIAL FOR ADDITIONAL HEAVY SHOWERS AND THUNDERSTORMS THROUGH TODAY... .ANOTHER WEATHER DISTURBANCE WILL MOVE ACROSS THE AREA MAINLY FROM MIDDAY AND INTO THIS EVENING. SHOWERS AND SCATTERED THUNDERSTORMS ARE EXPECTED TO REDEVELOP...MOSTLY IN NEW JERSEY... WITH THE POTENTIAL FOR LOCALLY VERY HEAVY RAIN TO OCCUR. NJZ001-007>009-PAZ060>062-101-103-105-231715- /O.CAN.KPHI.FF.A.0006.000000T0000Z-130724T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ SUSSEX-WARREN-MORRIS-HUNTERDON-BERKS-LEHIGH-NORTHAMPTON- WESTERN CHESTER-WESTERN MONTGOMERY-UPPER BUCKS- INCLUDING THE CITIES OF...NEWTON...WASHINGTON...MORRISTOWN... FLEMINGTON...READING...ALLENTOWN...BETHLEHEM...EASTON... HONEY BROOK...OXFORD...COLLEGEVILLE...POTTSTOWN...CHALFONT... PERKASIE 1213 PM EDT TUE JUL 23 2013 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. THE PRIMARY THREAT REGION HAS SHIFTED EASTWARD INTO NEW JERSEY. $$ DEZ001-NJZ010-012-013-015>020-PAZ070-071-102-104-106-240000- /O.CON.KPHI.FF.A.0006.000000T0000Z-130724T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SOMERSET-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-DELAWARE- PHILADELPHIA-EASTERN CHESTER-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...TRENTON...PENNSVILLE...GLASSBORO... CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JACKSON... MEDIA...PHILADELPHIA...WEST CHESTER...KENNET SQUARE... NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN 1213 PM EDT TUE JUL 23 2013 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... THE FLASH 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...CAMDEN...GLOUCESTER... MERCER...MIDDLESEX...NORTHWESTERN BURLINGTON...OCEAN...SALEM... SOMERSET AND WESTERN MONMOUTH. IN SOUTHEAST PENNSYLVANIA... DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY...LOWER BUCKS AND PHILADELPHIA. * UNTIL 8 PM EDT THIS EVENING * SCATTERED HEAVY SHOWERS AND THUNDERSTORMS WITH POTENTIAL TO PRODUCE 1 TO 2 INCHES OF RAIN IN AN HOUR ARE EXPECTED IN THE WATCH AREA THIS AFTERNOON. THE HEAVY SHOWERS SHOULD NOT BE AS ORGANIZED AS LAST NIGHT. HOWEVER LAST NIGHTS RAINS MADE THE REMAINING AREAS OF THE WATCH MORE VULNERABLE TO EXCESSIVE RUNOFF FROM HEAVY RAIN. 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. && $$
757 WGUS61 KPHI 231910 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 310 PM EDT TUE JUL 23 2013 DEZ001-NJZ010-012-013-015>020-PAZ070-071-102-104-106-232015- /O.CAN.KPHI.FF.A.0006.000000T0000Z-130724T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-SOMERSET-MIDDLESEX-WESTERN MONMOUTH-MERCER-SALEM- GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-OCEAN-DELAWARE- PHILADELPHIA-EASTERN CHESTER-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...TRENTON...PENNSVILLE...GLASSBORO... CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...JACKSON... MEDIA...PHILADELPHIA...WEST CHESTER...KENNET SQUARE... NORRISTOWN...LANSDALE...MORRISVILLE...DOYLESTOWN 310 PM EDT TUE JUL 23 2013 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA HAS BEEN CANCELLED. SCATTERED HEAVY SHOWERS AND THUNDERSTORMS CAN PRODUCE BRIEF STREET FLOODING BUT MORE WIDESPREAD AND ORGANIZED 1 TO 2 INCH PER HOUR RAINS ARE NOT ANTICIPATED THIS AFTERNOON. SHOWERS NOW OCCURRING FROM THE DELAWARE VALLEY ACROSS NEW JERSEY AND NORTHERN DELAWARE SHOULD BE ENDING FROM WEST TO EAST LATE IN THE DAY EXCEPT POSSIBLY NOT UNTIL 7 PM ALONG THE NEW JERSEY COAST. $$ DRAG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 9:19 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 3 hr |
| Jul 22, 9:53 PM EDT | Areal Flood Advisory | PHI | Berks, Lehigh | 3 hr |
| Jul 22, 11:09 PM EDT | Areal Flood Advisory | PHI | Berks, Chester | 3 hr |
| Jul 22, 11:39 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 4 hr |
| Jul 23, 12:11 AM EDT | Special Weather Statement | PHI | Chester | 94 min |
| Jul 23, 12:25 AM EDT | Flash Flood Warning | PHI | Chester | 4 hr |
| Jul 23, 1:50 AM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 23, 2:11 AM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 4 hr |
| Jul 23, 4:10 PM EDT | Special Weather Statement | PHI | Bucks, Delaware, Philadelphia | 2 hr |
| Jul 22, 9:48 PM EDT | Areal Flood Advisory | PHI | Morris | 4 hr |
| Jul 23, 2:38 AM EDT | Special Weather Statement | PHI | Mercer, Middlesex | 97 min |
| Jul 23, 4:02 AM EDT | Areal Flood Advisory | PHI | Burlington, Monmouth, Ocean | 4 hr |
| Jul 23, 9:24 AM EDT | Areal Flood Warning | PHI | Burlington | 6 hr |
| Jul 23, 10:32 AM EDT | Special Weather Statement | PHI | Atlantic | 58 min |
| Jul 23, 11:22 AM EDT | Special Weather Statement | PHI | Atlantic, Cumberland | 53 min |
| Jul 23, 11:56 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Cumberland, Ocean | 4 hr |
| Jul 23, 12:03 PM EDT | Special Weather Statement | PHI | Atlantic | 57 min |
| Jul 23, 12:54 PM EDT | Special Weather Statement | PHI | Atlantic | 66 min |
| Jul 23, 3:08 PM EDT | Coastal Flood Advisory | PHI | Atlantic, Burlington, Cape May, Cumberland, Middlesex, Monmouth and 1 more | 9 hr |
| Jul 23, 2:22 AM EDT | Special Weather Statement | PHI | Kent, Sussex | 2 hr |
Nearby
Flash Flood Watches in New Jersey, 2013Flash Flood Watches in Pennsylvania, 2013Flash Flood Watches in Delaware, 2013Every flash flood watch in 2013
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.