Alert archive / Pennsylvania / Flash Flood Watches in 2017
Flash Flood Watch 2, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 6, 2017, 4:16 PM EDT for 4 states. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 6, 2017, 4:16 PM EDT (20:16 UTC)
- Expired
- Jul 6, 2017, 7:16 PM EDT
- In force
- 3 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties New Castle County, DE, Cecil County, MD, Kent County, MD, Camden County, NJ, Gloucester County, NJ, Salem County, NJ, Chester County, PA, Delaware County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 94 km from the middle of the area, began a volume at 20:19 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 12:00Z, 8.3 hours before the alert went out and 188 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
- 227 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 468 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
592 WGUS61 KPHI 062016 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 416 PM EDT Thu Jul 6 2017 DEZ001-MDZ008-012-NJZ016>018-PAZ070-071-102-104-070900- /O.NEW.KPHI.FF.A.0002.170706T2016Z-170707T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Kent MD-Salem-Gloucester-Camden-Delaware- Philadelphia-Eastern Chester-Eastern Montgomery- Including the cities of Wilmington, Elkton, Chestertown, Pennsville, Glassboro, Camden, Cherry Hill, Media, Philadelphia, West Chester, Kennett Square, Norristown, and Lansdale 416 PM EDT Thu Jul 6 2017 ...FLASH FLOOD WATCH IN EFFECT 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 southeast Pennsylvania, including the following areas, in northern Delaware, New Castle. In northeast Maryland, Cecil and Kent MD. In southern New Jersey, Camden, Gloucester, and Salem. In southeast Pennsylvania, Delaware, Eastern Chester, Eastern Montgomery, and Philadelphia. * Through late tonight * Small clusters of excessive rain producing showers will cause flooding in a few spots. The urban areas of Northern Delaware appear vulnerable to flooding this evening. * Travel will be impacted with poor drainage flooding this evening with storm totals by midnight near 1 inch, but isolated 5 inch amounts 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. && $$ Drag
1 follow-up statement
856 WGUS61 KPHI 062316 FFAPHI Flood Watch National Weather Service Mount Holly NJ 716 PM EDT Thu Jul 6 2017 DEZ001-MDZ008-012-NJZ016>018-PAZ070-071-102-104-070030- /O.CAN.KPHI.FF.A.0002.000000T0000Z-170707T1000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ New Castle-Cecil-Kent MD-Salem-Gloucester-Camden-Delaware- Philadelphia-Eastern Chester-Eastern Montgomery- Including the cities of Wilmington, Elkton, Chestertown, Pennsville, Glassboro, Camden, Cherry Hill, Media, Philadelphia, West Chester, Kennett Square, Norristown, and Lansdale 716 PM EDT Thu Jul 6 2017 ...FLASH FLOOD WATCH IS CANCELLED... The threat of heavy rain has decreased in extreme southeastern Pennsylvania, southwestern New Jersey, northern Delaware and northeastern Maryland. As a result, the Flash Flood Watch has been cancelled. $$ Iovino
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 3:35 PM EDT | Flash Flood Warning | PHI | Cecil | 4 hr |
| Jul 6, 4:04 PM EDT | Areal Flood Advisory | PHI | Cecil | 4 hr |
| Jul 6, 4:08 PM EDT | Special Weather Statement | PHI | Kent | 67 min |
| Jul 6, 4:17 PM EDT | Areal Flood Advisory | PHI | Kent | 3 hr |
| Jul 6, 5:39 PM EDT | Special Weather Statement | PHI | Kent | 66 min |
| Jul 6, 6:15 PM EDT | Areal Flood Advisory | PHI | Kent, Queen Anne's | 3 hr |
| Jul 6, 7:36 PM EDT | Areal Flood Warning | PHI | Cecil, Kent | 10 hr |
| Jul 6, 2:41 PM EDT | Special Weather Statement | PHI | New Castle | 64 min |
| Jul 6, 3:01 PM EDT | Areal Flood Advisory | PHI | New Castle | 119 min |
Nearby
Flash Flood Watches in Pennsylvania, 2017Flash Flood Watches in New Jersey, 2017Flash Flood Watches in Maryland, 2017Every flash flood watch in 2017
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.