Alert archive / New Jersey / Flood Watches in 2009
Flood Watch 1, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flood watch at Apr 5, 2009, 3:06 PM EDT for Delaware County, Philadelphia County, Pennsylvania; 9 counties in New Jersey; New Castle County, Delaware. It took effect at Apr 6, 2009, 6:00 AM EDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Apr 5, 2009, 3:06 PM EDT (19:06 UTC)
- In effect from
- Apr 6, 2009, 6:00 AM EDT
- Expired
- Apr 6, 2009, 1:06 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
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, Salem County, NJ, Somerset County, NJ, Delaware County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 19:12 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, 7.1 hours before the alert went out and 196 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
- 1006 m above ground
- 0-6 km bulk shear
- 81 kt
- 0-1 km storm-relative helicity
- 185 m²/s²
- 0-3 km storm-relative helicity
- 225 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 051906 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 306 PM EDT SUN APR 5 2009 ...FLOODING POSSIBLE THROUGH MONDAY AFTERNOON... .A STRONG LOW PRESSURE SYSTEM CURRENTLY CENTERED OVER NORTHERN MISSOURI WILL TREK EASTWARD OVERNIGHT. THIS SYSTEM HAS A HISTORY OF PRODUCING HEAVY RAINFALL IN THE CENTRAL PLAINS. DEZ001-NJZ009-010-012>019-PAZ067>071-060930- /O.NEW.KPHI.FA.A.0001.090406T1000Z-090406T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH- EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 306 PM EDT SUN APR 5 2009 ...FLOOD WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY AFTERNOON... 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...CAMDEN... EASTERN MONMOUTH...GLOUCESTER...HUNTERDON...MERCER... MIDDLESEX...NORTHWESTERN BURLINGTON...SALEM...SOMERSET AND WESTERN MONMOUTH. IN SOUTHEAST PENNSYLVANIA...BUCKS... CHESTER...DELAWARE...MONTGOMERY AND PHILADELPHIA. * FROM MONDAY MORNING THROUGH MONDAY AFTERNOON * AN INITIAL BURST OF RAIN SHOULD BEGIN DURING THE MORNING RUSH AS A WARM FRONT BEGINS TO LIFT NORTH THROUGH THE REGION. RAINFALL TOTALS SHOULD AVERAGE AROUND ONE INCH. THUNDERSTORMS ASSOCIATED WITH THIS SYSTEM WILL PRODUCE HEAVIER RAINFALL AND COULD LEAD TO A FLOOD THREAT OF SMALLER STREAMS AND CREEKS. EVEN WITHOUT STREAM OR CREEK FLOODING, THE HEAVIER RAIN SHOULD ARRIVE IN TIME FOR THE MORNING COMMUTE AND CAUSE TRAVELING PROBLEMS AROUND THE REGION. 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. && $$ HEAVENER
3 follow-up statements
000 WGUS61 KPHI 060642 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 242 AM EDT MON APR 6 2009 ...FLOODING IS POSSIBLE TODAY... DEZ001-NJZ009-010-012>019-PAZ067>071-061500- /O.CON.KPHI.FA.A.0001.090406T1000Z-090406T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH- EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 242 AM EDT MON APR 6 2009 ...FLOOD WATCH REMAINS IN EFFECT TODAY... 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...CAMDEN...EASTERN MONMOUTH...GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX... NORTHWESTERN BURLINGTON...SALEM...SOMERSET AND WESTERN MONMOUTH. IN SOUTHEAST PENNSYLVANIA...BUCKS...CHESTER... DELAWARE...MONTGOMERY AND PHILADELPHIA. * THROUGH THIS AFTERNOON * AN AREA OF RAIN WITH SOME EMBEDDED THUNDERSTORMS WILL SPREAD ACROSS THE REGION EARLY THIS MORNING AS A WARM FRONT FORMS OVER THE AREA. SHOWERS AND MORE WIDESPREAD THUNDERSTORMS ARE EXPECTED TO FORM THIS AFTERNOON WITH A BURST OF HEAVY RAIN EXPECTED. RAINFALL AMOUNTS SHOULD AVERAGE AROUND AN INCH. HOWEVER, THERE WILL BE SOME AREAS THAT RECEIVE MORE DUE TO THE THUNDERSTORMS ASSOCIATED WITH THE SYSTEM. THESE HEAVIER AMOUNTS COULD LEAD TO FLOODING ON SMALLER STREAMS AND CREEKS AS WELL AS IN AREAS WITH POOR DRAINAGE. 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. && $$
000 WGUS61 KPHI 061308 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 908 AM EDT MON APR 6 2009 ...FLOODING IS POSSIBLE TODAY... DEZ001-NJZ009-010-012>019-PAZ067>071-062200- /O.CON.KPHI.FA.A.0001.000000T0000Z-090406T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH- EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 908 AM EDT MON APR 6 2009 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 6 PM EDT THIS EVENING... 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...CAMDEN...EASTERN MONMOUTH...GLOUCESTER...HUNTERDON...MERCER...MIDDLESEX... NORTHWESTERN BURLINGTON...SALEM...SOMERSET AND WESTERN MONMOUTH. IN SOUTHEAST PENNSYLVANIA...BUCKS...CHESTER... DELAWARE...MONTGOMERY AND PHILADELPHIA. * UNTIL 6 PM EDT THIS EVENING * THE FIRST ROUND OF RAIN WITH SOME EMBEDDED THUNDERSTORMS MOVED THROUGH THE FLOOD WATCH AREA. RADAR STORM TOTAL ESTIMATES WERE BETWEEN ONE QUARTER AND HALF AN INCH WITH THE HIGHEST AMOUNTS OCCURRING IN NEW JERSEY. EVEN HEAVIER RAIN AND LARGER HAIL FELL EAST OF THE WATCH AREA. MORE ORGANIZED SHOWERS AND THUNDERSTORMS OVER VIRGINIA WILL MOVE ACROSS THE WATCH AREA LATER TODAY. RAINFALL AMOUNTS SHOULD AVERAGE AROUND AN INCH. HOWEVER... THERE WILL BE SOME AREAS THAT RECEIVE MORE DUE TO THE THUNDERSTORMS ASSOCIATED WITH THE SYSTEM. THESE HEAVIER AMOUNTS COULD LEAD TO FLOODING ON SMALLER STREAMS AND CREEKS AS WELL AS IN AREAS WITH POOR DRAINAGE. A COLD FRONT WILL MOVE THROUGH THE AREA THIS AFTERNOON AND END THE THREAT FOR FLOODING. 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. && $$ TFG
000 WGUS61 KPHI 061706 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 106 PM EDT MON APR 6 2009 DEZ001-NJZ009-010-012>019-PAZ067>071-061815- /O.CAN.KPHI.FA.A.0001.000000T0000Z-090406T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-HUNTERDON-SOMERSET-MIDDLESEX-WESTERN MONMOUTH- EASTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...FLEMINGTON...SOMERVILLE... NEW BRUNSWICK...FREEHOLD...SANDY HOOK...TRENTON...PENNSVILLE... GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 106 PM EDT MON APR 6 2009 ...FLOOD WATCH IS CANCELLED... THE FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE...NEW JERSEY AND SOUTHEAST PENNSYLVANIA HAS BEEN CANCELLED. MOST OF THE HEAVIEST PRECIPITATION HAS FALLEN EAST OF THE FLOOD WATCH AREA. THE HEAVIEST OF THE RAIN AND THE THUNDERSTORMS HAVE MOVED OFFSHORE AT THIS TIME BUT MORE RAIN IS ADVECTING INTO THE REGION FROM THE SOUTHWEST. THE THREAT FOR WIDESPREAD FLOODING HAS ENDED, HOWEVER, THERE MAY BE LOCALIZED STREET FLOODING IN POOR DRAINAGE AREAS. AS A RESULT, THE FLOOD WATCH HAS BEEN CANCELLED. $$ HEAVENER/GORSE
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 5, 3:37 PM EDT | Gale Watch | PHI | 12 hr | |
| Apr 5, 3:37 PM EDT | Small Craft Advisory | PHI | 3 days |
Nearby
Flood Watches in New Jersey, 2009Flood Watches in Pennsylvania, 2009Flood Watches in Delaware, 2009Every 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.