Alert archive / Pennsylvania / Flash Flood Watches in 2020
Flash Flood Watch 3, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood watch at Jul 8, 2020, 12:13 PM EDT for 7 counties in Pennsylvania; 4 counties in New Jersey. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Jul 8, 2020, 12:13 PM EDT (16:13 UTC)
- Expired
- Jul 8, 2020, 6:01 PM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Flood severity
- None
Counties Hunterdon County, NJ, Morris County, NJ, Sussex County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Carbon County, PA, Lehigh County, PA, Monroe County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 109 km from the middle of the area, began a volume at 16:13 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, 4.2 hours before the alert went out and 200 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
- 247 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 763 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
030 WGUS61 KPHI 081613 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 1213 PM EDT Wed Jul 8 2020 PAZ054-055-060>062-090015- /O.NEW.KPHI.FF.A.0003.200708T1613Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Berks-Lehigh-Northampton- Including the cities of Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, and Easton 1213 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH IN EFFECT UNTIL 10 PM EDT THIS EVENING... The National Weather Service in Mount Holly has issued a * Flash Flood Watch for portions of east central Pennsylvania and northeast Pennsylvania, including the following areas, in east central Pennsylvania, Berks, Lehigh, and Northampton. In northeast Pennsylvania, Carbon and Monroe. * Until 10 PM EDT this evening * Slow moving storms are expected to continue forming along outflow boundaries through the early afternoon across the higher terrain of the Poconos and portions of the Lehigh Valley. Slow storm motion and high rainfall rates may result in flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ Davis
3 follow-up statements
026 WGUS61 KPHI 081814 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 214 PM EDT Wed Jul 8 2020 NJZ001-007-008-090200- /O.EXA.KPHI.FF.A.0003.000000T0000Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris- Including the cities of Newton, Washington, and Morristown 214 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH IN EFFECT UNTIL 10 PM EDT THIS EVENING... The National Weather Service in Mount Holly has expanded the * Flash Flood Watch to include a portion of northern New Jersey, including the following areas, Morris, Sussex, and Warren. * Until 10 PM EDT this evening * Slow moving storms are expected to gradually push south and east along outflow boundaries through the afternoon across portions of the Lehigh Valley and into northwestern New Jersey. Slow storm motion and high rainfall rates may result in flash flooding. Several rainfall reports over 1-2 inches have already occurred. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ PAZ054-055-060>062-090200- /O.CON.KPHI.FF.A.0003.000000T0000Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe-Berks-Lehigh-Northampton- Including the cities of Jim Thorpe, Stroudsburg, Reading, Allentown, Bethlehem, and Easton 214 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING... The Flash Flood Watch continues for * Portions of east central Pennsylvania and northeast Pennsylvania, including the following areas, in east central Pennsylvania, Berks, Lehigh, and Northampton. In northeast Pennsylvania, Carbon and Monroe. * Until 10 PM EDT this evening * Slow moving storms are expected to gradually push south and east along outflow boundaries through the afternoon across portions of the Lehigh Valley and into northwestern New Jersey. Slow storm motion and high rainfall rates may result in flash flooding. Several rainfall reports over 1-2 inches have already occurred. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ Davis
107 WGUS61 KPHI 081952 FFAPHI URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Mount Holly NJ 352 PM EDT Wed Jul 8 2020 PAZ054-055-082100- /O.CAN.KPHI.FF.A.0003.000000T0000Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Carbon-Monroe- Including the cities of Jim Thorpe and Stroudsburg 352 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for Carbon and Monroe Counties has been cancelled as storms have moved out of the region. $$ NJZ009-PAZ103-105-090200- /O.EXA.KPHI.FF.A.0003.000000T0000Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Hunterdon-Western Montgomery-Upper Bucks- Including the cities of Flemington, Collegeville, Pottstown, Chalfont, and Perkasie 352 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH IN EFFECT UNTIL 10 PM EDT THIS EVENING... The National Weather Service in Mount Holly has expanded the * Flash Flood Watch to include portions of northwest New Jersey and southeast Pennsylvania, including the following areas, in northwest New Jersey, Hunterdon. In southeast Pennsylvania, Upper Bucks and Western Montgomery. * Until 10 PM EDT this evening * Slow moving storms are expected to gradually push south and east along outflow boundaries through the afternoon across portions of the Lehigh Valley and into northwestern New Jersey. Slow storm motion and high rainfall rates may result in flash flooding. Several rainfall reports over 1-2 inches have already been received. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ NJZ001-007-008-PAZ060>062-090200- /O.CON.KPHI.FF.A.0003.000000T0000Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Berks-Lehigh-Northampton- Including the cities of Newton, Washington, Morristown, Reading, Allentown, Bethlehem, and Easton 352 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING... The Flash Flood Watch continues for * Portions of northern New Jersey and east central Pennsylvania, including the following areas, in northern New Jersey, Morris, Sussex, and Warren. In east central Pennsylvania, Berks, Lehigh, and Northampton. * Until 10 PM EDT this evening * Slow moving storms are expected to gradually push south and east along outflow boundaries through the afternoon across portions of the Lehigh Valley and into northwestern New Jersey. Slow storm motion and high rainfall rates may result in flash flooding. Several rainfall reports over 1-2 inches have already been received. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that there is the potential for flash flooding which can be life-threatening. Heavy rain is expected to occur over a short period of time. Rapidly rising flood waters may quickly inundate roadways and areas of poor drainage. Streams and creeks could leave their banks, flooding nearby properties. Please monitor the forecast, especially if you live in a location that is prone to flooding. Be prepared to take action if a flash flood warning is issued for your area. && $$ Davis
977 WGUS61 KPHI 082201 FFAPHI Flood Watch National Weather Service Mount Holly NJ 601 PM EDT Wed Jul 8 2020 NJZ001-007>009-PAZ060>062-103-105-082315- /O.CAN.KPHI.FF.A.0003.000000T0000Z-200709T0200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Sussex-Warren-Morris-Hunterdon-Berks-Lehigh-Northampton- Western Montgomery-Upper Bucks- Including the cities of Newton, Washington, Morristown, Flemington, Reading, Allentown, Bethlehem, Easton, Collegeville, Pottstown, Chalfont, and Perkasie 601 PM EDT Wed Jul 8 2020 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of New Jersey and Pennsylvania has been cancelled. Storms have decreased in intensity, and the threat of flash flooding has diminished. $$ CMS
The office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 8, 11:26 AM EDT | Special Weather Statement | PHI | Carbon, Monroe | 49 min |
| Jul 8, 12:29 PM EDT | Special Weather Statement | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 61 min |
| Jul 8, 2:13 PM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Jul 8, 2:54 PM EDT | Special Weather Statement | PHI | Berks | 51 min |
| Jul 8, 3:25 PM EDT | Areal Flood Advisory | PHI | Berks | 4 hr |
| Jul 8, 3:45 PM EDT | Special Weather Statement | PHI | Berks | 45 min |
| Jul 8, 3:57 PM EDT | Flash Flood Warning | PHI | Berks | 3 hr |
| Jul 8, 1:46 PM EDT | Special Weather Statement | PHI | Sussex | 29 min |
| Jul 8, 2:25 PM EDT | Special Weather Statement | PHI | Warren | 35 min |
| Jul 8, 3:14 PM EDT | Special Weather Statement | PHI | Hunterdon | 46 min |
| Jul 8, 3:30 PM EDT | Small Craft Advisory | PHI | 3 days | |
| Jul 8, 4:43 PM EDT | Special Weather Statement | PHI | Middlesex | 32 min |
Nearby
Flash Flood Watches in Pennsylvania, 2020Flash Flood Watches in New Jersey, 2020Every flash flood watch in 2020
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.