Alert archive / Pennsylvania / Flash Flood Watches in 2014
Flash Flood Watch 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jun 12, 2014, 3:56 AM EDT for 4 states. It took effect at Jun 12, 2014, 12:00 PM EDT. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jun 12, 2014, 3:56 AM EDT (07:56 UTC)
- In effect from
- Jun 12, 2014, 12:00 PM EDT
- Expired
- Jun 12, 2014, 11:46 PM EDT
- In force
- 12 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, Berks County, PA, Bucks County, PA, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 82 km from the middle of the area, began a volume at 07:52 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
Washington/Dulle, VA (KIAD), launched 00:00Z, 7.9 hours before the alert went out and 207 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
- 1187 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 698 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
561 WGUS61 KPHI 120756 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 356 AM EDT THU JUN 12 2014 DEZ001-MDZ008-NJZ017>019-PAZ060-070-071-101>104-106-122000- /O.NEW.KPHI.FF.A.0003.140612T1600Z-140613T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-BERKS- DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER- WESTERN MONTGOMERY-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...GLASSBORO... CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...READING... MEDIA...PHILADELPHIA...HONEY BROOK...OXFORD...WEST CHESTER... KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...NORRISTOWN... LANSDALE...MORRISVILLE...DOYLESTOWN 356 AM EDT THU JUN 12 2014 ...FLASH FLOOD WATCH IN EFFECT FROM NOON EDT TODAY THROUGH LATE TONIGHT... THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...SOUTHERN NEW JERSEY AND PENNSYLVANIA... INCLUDING THE FOLLOWING AREAS...IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND...CECIL. IN SOUTHERN NEW JERSEY...CAMDEN...GLOUCESTER AND NORTHWESTERN BURLINGTON. IN PENNSYLVANIA...BERKS...DELAWARE...EASTERN CHESTER...EASTERN MONTGOMERY...LOWER BUCKS...PHILADELPHIA...WESTERN CHESTER AND WESTERN MONTGOMERY. * FROM NOON EDT TODAY THROUGH LATE TONIGHT * HEAVY RAIN WILL BE POSSIBLE WITH ANY THUNDERSTORMS THAT DEVELOP TODAY AND TONIGHT. RAIN RATES OF 1 INCH PER HOUR WILL BE POSSIBLE IN THE STRONGER STORMS. THIS COULD LEAD TO FLASH FLOODING ESPECIALLY IN URBAN AND POOR DRAINAGE AREAS. * THE AFTERNOON COMMUTE TODAY COULD BE IMPACTED BY HEAVY RAIN AND FLASH FLOODING IN SOME LOCATIONS. 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. && $$ JOHNSON
2 follow-up statements
683 WGUS61 KPHI 121904 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 304 PM EDT THU JUN 12 2014 DEZ001-MDZ008-NJZ017>019-PAZ060-070-071-101>104-106-130600- /O.CON.KPHI.FF.A.0003.000000T0000Z-140613T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-BERKS- DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER- WESTERN MONTGOMERY-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...GLASSBORO... CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...READING... MEDIA...PHILADELPHIA...HONEY BROOK...OXFORD...WEST CHESTER... KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...NORRISTOWN... LANSDALE...MORRISVILLE...DOYLESTOWN 304 PM EDT THU JUN 12 2014 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 2 AM EDT FRIDAY... THE FLASH FLOOD WATCH CONTINUES FOR * PORTIONS OF NORTHERN DELAWARE...NORTHEAST MARYLAND...SOUTHERN NEW JERSEY AND PENNSYLVANIA...INCLUDING THE FOLLOWING AREAS... IN NORTHERN DELAWARE...NEW CASTLE. IN NORTHEAST MARYLAND... CECIL. IN SOUTHERN NEW JERSEY...CAMDEN...GLOUCESTER AND NORTHWESTERN BURLINGTON. IN PENNSYLVANIA...BERKS...DELAWARE... EASTERN CHESTER...EASTERN MONTGOMERY...LOWER BUCKS... PHILADELPHIA...WESTERN CHESTER AND WESTERN MONTGOMERY. * UNTIL 2 AM EDT FRIDAY * BANDS OF HEAVY SHOWERS WITH ISOLATED EMBEDDED THUNDERSTORMS WILL BE MOVING VERY SLOWLY NORTHWARD THROUGH THE WATCH AREA THIS EVENING. HEAVY RAINS FROM EARLIER THIS WEEK HAVE LEFT PORTIONS OF THE DELAWARE VALLEY VULNERABLE TO FLOODING. RAINFALL OF 1.5 INCHES IN AN HOUR WOULD PROBABLY RESULT IN POCKETS OF FLASH FLOODING. * THERE IS CONSIDERABLE UNCERTAINTY WHETHER EXCESSIVE RAIN OCCURS TONIGHT AND WHERE. HOWEVER...IT DOES LOOK LIKE THE HEAVIEST RAIN WILL OCCUR AFTER DARK. * BE ALERT FOR POCKETS OF POOR DRAINAGE FLOODING DURING THE EVENING COMMUTE. IF HEAVY RAIN DOES OCCUR...DO NOT DRIVE THROUGH FLOODED ROADS...ESPECIALLY AT NIGHT. 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. && $$ DRAG
744 WGUS61 KPHI 130346 FFAPHI FLOOD WATCH NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1146 PM EDT THU JUN 12 2014 DEZ001-MDZ008-NJZ017>019-PAZ060-070-071-101>104-106-130500- /O.CAN.KPHI.FF.A.0003.000000T0000Z-140613T0600Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ NEW CASTLE-CECIL-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-BERKS- DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER- WESTERN MONTGOMERY-EASTERN MONTGOMERY-LOWER BUCKS- INCLUDING THE CITIES OF...WILMINGTON...ELKTON...GLASSBORO... CAMDEN...CHERRY HILL...MOORESTOWN...MOUNT HOLLY...READING... MEDIA...PHILADELPHIA...HONEY BROOK...OXFORD...WEST CHESTER... KENNETT SQUARE...COLLEGEVILLE...POTTSTOWN...NORRISTOWN... LANSDALE...MORRISVILLE...DOYLESTOWN 1146 PM EDT THU JUN 12 2014 ...FLASH FLOOD WATCH IS CANCELLED... THE FLASH FLOOD WATCH FOR PORTIONS OF NORTHERN DELAWARE... NORTHEAST MARYLAND...SOUTHERN NEW JERSEY AND PENNSYLVANIA HAS BEEN CANCELLED. WE ARE CURRENTLY EXPERIENCING A LULL IN THE SHOWER ACTIVITY...THUS THE WATCH WAS CANCELLED. HOWEVER...MORE SHOWERS AND THUNDERSTORMS ARE POSSIBLE FRIDAY. $$
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 5:30 PM EDT | Coastal Flood Advisory | PHI | Cape May, Cumberland | 7 hr |
| Jun 12, 6:33 PM EDT | Areal Flood Advisory | PHI | Chester | 4 hr |
| Jun 12, 2:07 AM EDT | Special Weather Statement | PHI | Kent | 53 min |
| Jun 12, 12:54 AM EDT | Special Weather Statement | PHI | Caroline | 66 min |
| Jun 12, 1:44 AM EDT | Areal Flood Advisory | PHI | Caroline, Talbot | 4 hr |
| Jun 12, 12:31 PM EDT | Areal Flood Advisory | PHI | Talbot | 6 hr |
| Jun 12, 2:20 PM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's | 4 hr |
Nearby
Flash Flood Watches in Pennsylvania, 2014Flash Flood Watches in New Jersey, 2014Flash Flood Watches in Delaware, 2014Every flash flood watch in 2014
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.