Alert archive / New Jersey / Flash Flood Watches in 2010
Flash Flood Watch 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 14, 2010, 10:15 AM EDT for 4 states. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Jul 14, 2010, 10:15 AM EDT (14:15 UTC)
- Expired
- Jul 14, 2010, 6:54 PM EDT
- In force
- 9 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties New Castle County, DE, Cecil County, MD, Burlington County, NJ, Camden County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Salem County, NJ, Somerset County, NJ, Warren County, NJ, Berks County, PA, Delaware County, PA, Lehigh County, PA, Northampton County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 14:16 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
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 2.3 hours before the alert went out and 116 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
- 181 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 495 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 56 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
780 WGUS61 KPHI 141415 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1015 AM EDT WED JUL 14 2010 DEZ001-MDZ008-NJZ012-015>019-PAZ067>071-142000- /O.EXP.KPHI.FF.A.0001.000000T0000Z-100714T1400Z/ /O.NEW.KPHI.FF.A.0002.100714T1415Z-100714T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-MIDDLESEX-MERCER-SALEM-GLOUCESTER-CAMDEN- NORTHWESTERN BURLINGTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE- PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...NEW BRUNSWICK... TRENTON...PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL... MOORESTOWN...MOUNT HOLLY...WEST CHESTER...NORRISTOWN... DOYLESTOWN...MEDIA...PHILADELPHIA 1015 AM EDT WED JUL 14 2010 ...FLASH FLOOD WATCH IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...NEW JERSEY AND SOUTHEAST PENNSYLVANIA... INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY... CAMDEN...GLOUCESTER...MERCER...MIDDLESEX...NORTHWESTERN BURLINGTON AND SALEM. IN SOUTHEAST PENNSYLVANIA...BUCKS... CHESTER...DELAWARE...MONTGOMERY AND PHILADELPHIA. * UNTIL 4 PM EDT THIS AFTERNOON * AREAS OF MODERATE TO HEAVY RAIN WERE FALLING ACROSS MUCH OF THE WATCH AREA IN EASTERN PENNSYLVANIA AND NORTHERN NEW JERSEY. AS THIS RAIN PIVOTS THROUGH THE REGION...ADDITIONAL RAIN AMOUNTS OF 1/2 TO 1 INCH AND LOCALLY 2 INCHES WILL OCCUR THROUGH THIS AFTERNOON. * RUNOFF FROM THE PREVIOUS AND EXPECTED ADDITIONAL RAIN MAY CAUSE FLASH FLOODING IN A FEW AREAS...AS WELL AS SHARP RISES ON AREA STREAMS AND CREEKS. IN ADDITION...URBAN AND STREET FLOODING IS POSSIBLE. * PRECAUTIONARY/PREPAREDNESS ACTIONS... YOU SHOULD MONITOR THE LATEST FORECASTS AND BE PREPARED TO TAKE ACTION SHOULD FLASH FLOOD WARNINGS BE ISSUED. && 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. && $$ NJZ013-014-141515- /O.EXP.KPHI.FF.A.0001.000000T0000Z-100714T1400Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WESTERN MONMOUTH-EASTERN MONMOUTH- INCLUDING THE CITIES OF...FREEHOLD...SANDY HOOK 1015 AM EDT WED JUL 14 2010 ...FLASH FLOOD WATCH HAS EXPIRED... THE FLASH FLOOD WATCH FOR A PORTION OF CENTRAL NEW JERSEY HAS EXPIRED. MORE SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE THIS AFTERNOON...BUT AT THIS TIME FORECAST RAIN AMOUNTS ARE NOT EXPECTED TO CAUSE ADDITIONAL FLOOD THREATS. $$ NJZ007>010-PAZ060>062-142000- /O.NEW.KPHI.FF.A.0002.100714T1415Z-100714T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WARREN-MORRIS-HUNTERDON-SOMERSET-BERKS-LEHIGH-NORTHAMPTON- INCLUDING THE CITIES OF...WASHINGTON...MORRISTOWN...FLEMINGTON... SOMERVILLE...READING...ALLENTOWN...BETHLEHEM...EASTON 1015 AM EDT WED JUL 14 2010 ...FLASH FLOOD WATCH IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NEW JERSEY AND EAST CENTRAL PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NEW JERSEY... HUNTERDON...MORRIS...SOMERSET AND WARREN. IN EAST CENTRAL PENNSYLVANIA...BERKS...LEHIGH AND NORTHAMPTON. * UNTIL 4 PM EDT THIS AFTERNOON * AREAS OF MODERATE TO HEAVY RAIN WERE FALLING ACROSS MUCH OF THE WATCH AREA IN EASTERN PENNSYLVANIA AND NORTHERN NEW JERSEY. AS THIS RAIN PIVOTS THROUGH THE REGION...ADDITIONAL RAIN AMOUNTS OF 1/2 TO 1 INCH AND LOCALLY 2 INCHES WILL OCCUR THROUGH THIS AFTERNOON. * RUNOFF FROM THE PREVIOUS AND EXPECTED ADDITIONAL RAIN MAY CAUSE FLASH FLOODING IN A FEW AREAS...AS WELL AS SHARP RISES ON AREA STREAMS AND CREEKS. IN ADDITION...URBAN AND STREET FLOODING 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. && $$
2 follow-up statements
822 WGUS61 KPHI 141930 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 330 PM EDT WED JUL 14 2010 DEZ001-MDZ008-NJZ007>010-012-015>019-PAZ060>062-067>071-150200- /O.EXT.KPHI.FF.A.0002.000000T0000Z-100715T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 330 PM EDT WED JUL 14 2010 ...FLASH FLOOD WATCH NOW IN EFFECT UNTIL 10 PM EDT THIS EVENING... THE FLASH FLOOD WATCH IS NOW IN EFFECT FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN NEW JERSEY...CAMDEN...GLOUCESTER...HUNTERDON...MERCER... MIDDLESEX...MORRIS...NORTHWESTERN BURLINGTON...SALEM... SOMERSET AND WARREN. IN PENNSYLVANIA...BERKS...BUCKS... CHESTER...DELAWARE...LEHIGH...MONTGOMERY...NORTHAMPTON AND PHILADELPHIA. * UNTIL 10 PM EDT THIS EVENING * AREAS OF SHOWERS AND THUNDERSTORMS WITH MODERATE TO HEAVY RAIN CONTINUE TO DEVELOP IN A VERY MOIST AIR MASS ACROSS EASTERN PENNSYLVANIA AND NEW JERSEY. MANY OF THESE STORMS ARE SLOW MOVING...SO ADDITIONAL RAIN AMOUNTS OF 1/2 TO 1 INCH AND LOCALLY 2 INCHES WILL OCCUR THROUGH LATE THIS AFTERNOON AND EVENING. * RUNOFF FROM THE PREVIOUS AND EXPECTED ADDITIONAL RAIN MAY CAUSE FLASH FLOODING IN A FEW AREAS...AS WELL AS SHARP RISES ON AREA STREAMS AND CREEKS. IN ADDITION...URBAN AND STREET FLOODING 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. && $$
292 WGUS61 KPHI 142254 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 654 PM EDT WED JUL 14 2010 DEZ001-MDZ008-NJZ007>010-012-015>019-PAZ060>062-067>071-150000- /O.CAN.KPHI.FF.A.0002.000000T0000Z-100715T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-BERKS- LEHIGH-NORTHAMPTON-CHESTER-MONTGOMERY-BUCKS-DELAWARE-PHILADELPHIA- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...WASHINGTON... MORRISTOWN...FLEMINGTON...SOMERVILLE...NEW BRUNSWICK...TRENTON... PENNSVILLE...GLASSBORO...CAMDEN...CHERRY HILL...MOORESTOWN... MOUNT HOLLY...READING...ALLENTOWN...BETHLEHEM...EASTON... WEST CHESTER...NORRISTOWN...DOYLESTOWN...MEDIA...PHILADELPHIA 654 PM EDT WED JUL 14 2010 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. WHILE A BAND OR TWO OF SCATTERED HEAVY SHOWERS WILL PERSIST INTO THE EVENING...RAINFALL SHOULD NOT BE NEARLY AS HEAVY AS THAT OF THIS PAST AFTERNOON WHEN ONE TO OVER 3.5 INCH AMOUNTS FELL IN A SHORT PERIOD OF TIME. THE MOST SERIOUS SHORT TERM FLOODING HAS ALREADY OCCURRED. $$ DRAG
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 1:29 AM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Jul 14, 1:44 AM EDT | Special Weather Statement | PHI | Chester | 61 min |
| Jul 14, 2:32 AM EDT | Flash Flood Warning | PHI | Chester | 3 hr |
| Jul 14, 2:52 AM EDT | Flash Flood Warning | PHI | Delaware | 3 hr |
| Jul 14, 3:27 AM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Jul 14, 3:46 AM EDT | Flash Flood Warning | PHI | Philadelphia | 3 hr |
| Jul 14, 3:52 AM EDT | Special Weather Statement | PHI | Carbon | 53 min |
| Jul 14, 3:58 AM EDT | Areal Flood Advisory | PHI | Bucks, Montgomery | 3 hr |
| Jul 14, 3:59 AM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 14, 6:06 AM EDT | Areal Flood Advisory | PHI | Carbon, Monroe | 4 hr |
| Jul 14, 10:04 AM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Jul 14, 11:11 AM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 14, 12:52 PM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 3 hr |
| Jul 14, 1:35 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 115 min |
| Jul 14, 2:11 PM EDT | Flash Flood Warning | PHI | Delaware, Montgomery, Philadelphia | 109 min |
| Jul 14, 2:36 PM EDT | Areal Flood Advisory | PHI | Bucks | 3 hr |
| Jul 14, 3:12 PM EDT | Flash Flood Warning | PHI | Bucks | 63 min |
| Jul 14, 4:03 PM EDT | Areal Flood Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 79 min |
| Jul 13, 8:19 PM EDT | Special Weather Statement | PHI | Mercer | 71 min |
| Jul 13, 11:08 PM EDT | Special Weather Statement | PHI | Cumberland, Salem | 62 min |
| Jul 13, 11:37 PM EDT | Special Weather Statement | PHI | Cape May | 53 min |
| Jul 13, 11:43 PM EDT | Special Weather Statement | PHI | Camden | 62 min |
| Jul 14, 12:08 AM EDT | Special Weather Statement | PHI | Atlantic, Cape May | 67 min |
| Jul 14, 2:40 AM EDT | Areal Flood Advisory | PHI | Cumberland, Gloucester, Salem | 3 hr |
| Jul 14, 3:21 AM EDT | Special Marine Warning | PHI | 39 min | |
| Jul 14, 3:37 AM EDT | Small Craft Advisory for Hazardous Seas | PHI | 16 hr | |
| Jul 14, 3:49 AM EDT | Special Weather Statement | PHI | Morris | 56 min |
| Jul 14, 4:08 AM EDT | Special Marine Warning | PHI | 67 min | |
| Jul 14, 4:10 AM EDT | Special Weather Statement | PHI | Atlantic, Burlington, Camden, Cumberland, Gloucester, Salem | 65 min |
| Jul 14, 4:51 AM EDT | Special Weather Statement | PHI | Ocean | 54 min |
| Jul 14, 5:26 AM EDT | Special Weather Statement | PHI | Ocean | 64 min |
| Jul 14, 10:26 AM EDT | Areal Flood Advisory | PHI | Morris, Somerset | 3 hr |
| Jul 14, 10:56 AM EDT | Areal Flood Advisory | PHI | Hunterdon, Morris, Somerset, Sussex, Warren | 4 hr |
| Jul 14, 12:47 PM EDT | Areal Flood Advisory | PHI | Atlantic, Camden, Cape May, Cumberland, Gloucester, Salem | 3 hr |
| Jul 14, 7:58 PM EDT | Special Weather Statement | PHI | Mercer | 62 min |
| Jul 13, 9:21 PM EDT | Severe Thunderstorm Warning | PHI | Kent, Queen Anne's, Talbot | 64 min |
| Jul 13, 9:41 PM EDT | Severe Thunderstorm Warning | PHI | Caroline, Queen Anne's, Talbot | 64 min |
| Jul 13, 9:52 PM EDT | Special Weather Statement | PHI | Cecil | 68 min |
| Jul 14, 1:07 AM EDT | Special Weather Statement | PHI | Talbot | 83 min |
| Jul 14, 2:58 AM EDT | Special Weather Statement | PHI | Caroline, Kent, Queen Anne's | 62 min |
| Jul 13, 10:22 PM EDT | Special Weather Statement | PHI | Kent, Sussex | 63 min |
Nearby
Flash Flood Watches in New Jersey, 2010Flash Flood Watches in Pennsylvania, 2010Flash Flood Watches in Maryland, 2010Every flash flood watch in 2010
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.