Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 68, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Sep 1, 2021, 4:12 PM EDT for 5 counties in Pennsylvania; Hunterdon County, Warren County, New Jersey. It was in force for 7 hr. 60 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 1, 2021, 4:12 PM EDT (20:12 UTC)
- Expired
- Sep 1, 2021, 11:00 PM EDT
- In force
- 7 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Warren County, NJ, Berks County, PA, Bucks County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 104 km from the middle of the area, began a volume at 20:13 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 1, 4:15 PM EDT | FLASH FLOOD | 1 Sw Ancient Oaks, PA | SEVERAL ROADS CLOSED IN THE SPRING CREEK AREA, INCLUDING SPRING CREEK ROAD AND MILL CREEK ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 4:30 PM EDT | FLASH FLOOD | Graterford, PA | SMALL CREEK IN THE VICINITY OF PERKIOMEN CREEK NEAR GRATERFORD IS OUT OF ITS BANKS. |
| Sep 1, 4:48 PM EDT | FLASH FLOOD | 1 E Bloomsbury, NJ | FLOODING ON NJ 173 EASTBOUND EAST OF I-78/US 22 (BETHLEHEM TWP) ALL LANES CLOSED. |
| Sep 1, 5:15 PM EDT | FLASH FLOOD | 1 Ssw Schwenksville, PA | TOWNSHIP LINE ROAD AND MAIN STREET CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:30 PM EDT | FLASH FLOOD | 2 Sw Pennsburg, PA | THE GAUGE ON WEST BRANCH PERKIOMEN CREEK AT HILLEGASS (HLGP1) REACHED FLOOD STAGE AT 530 PM 9/1, CRESTING AT 6.42 FEET (MODERATE FLOODING) AT 1015 PM 9/1. |
| Sep 1, 5:30 PM EDT | FLASH FLOOD | 3 Ese Lower Pottsgrove, PA | NEIFFER ROAD AND GAME FARM ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:33 PM EDT | FLASH FLOOD | 2 Wsw Emmaus, PA | LEHIGH STREET AND INDIAN CREEK ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:34 PM EDT | FLASH FLOOD | 2 Sw Upper Hanover Twp, PA | KUTZTOWN ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:40 PM EDT | FLOOD | Warrington, PA | |
| Sep 1, 5:40 PM EDT | FLASH FLOOD | 2 Wsw Richland Twp, PA | ROUTE 309 CLOSED IN VICINITY OF MELODY LANE FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:44 PM EDT | FLASH FLOOD | 2 Ne Ancient Oaks, PA | MINESITE ROAD AND SCHANTZ ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:45 PM EDT | FLASH FLOOD | 1 S Upper Hanover Twp, PA | THE GAUGE ON PERKIOMEN CREEK AT EAST GREENVILLE (EGRP1) REACHED FLOOD STAGE AT 545 PM 9/1. CRESTING AT 9.24 FEET (MAJOR FLOODING) AT 915 PM 9/1. |
| Sep 1, 5:45 PM EDT | FLASH FLOOD | 2 Ene East Rockhill Twp, PA | THE GAUGE ON EAST BRANCH PERKIOMEN CREEK AT DUBLIN (DBLP1) REACHED FLOOD STAGE AT 545 PM 9/1, CRESTING AT 10.54 FEET (MAJOR FLOODING) AT 715 PM 9/1. |
| Sep 1, 5:45 PM EDT | FLASH FLOOD | Lower Providence Townsh, PA | MANY WATER RESCUES ONGOING AROUND MONTGOMERY COUNTY. |
| Sep 1, 5:55 PM EDT | FLASH FLOOD | 2 Wnw Bridgeton Twp, PA | STATE HIGHWAY 32 CLOSED NEAR NARROWS HILL ROAD FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:57 PM EDT | FLASH FLOOD | Skippack Twp, PA | STATE HIGHWAY 73 CLOSED NEAR ROUTE 113 FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 5:59 PM EDT | FLASH FLOOD | 2 Sse Montgomeryville, PA | ROUTE 309 CLOSED IN VICINITY OF STUMP ROAD FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:00 PM EDT | FLASH FLOOD | 2 Ene Schwenksville, PA | THE GAUGE ON EAST BRANCH PERKIOMEN CREEK AT SCHWENKSVILLE (SWVP1) REACHED FLOOD STAGE AT 600 PM 9/1, CRESTING AT 16.07 FEET (RECORD FLOODING) AT 1215 AM 9/2. |
| Sep 1, 6:15 PM EDT | FLASH FLOOD | Graterford, PA | THE GAUGE AT PERKIOMEN CREEK AT GRATERFORD (GRAP1) REACHED FLOOD STAGE AT 615 PM. |
| Sep 1, 6:25 PM EDT | FLASH FLOOD | 1 Nne Graterford, PA | FLOODING CLOSED SKIPPACK PIKE NEAR CROSS ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:32 PM EDT | FLASH FLOOD | Collegeville, PA | FLOODING CLOSED STATE ROUTE 29 NEAR THE MAIN STREET INTERSECTION. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:35 PM EDT | FLASH FLOOD | 1 S Bethlehem Twp, PA | FLOODING CLOSED PORTIONS OF PEMBROKE ROAD, WILLOW PARK ROAD, FREEMANSBURG AVENUE, AND STEFKO BOULEVARD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:40 PM EDT | HEAVY RAIN 5.52 | Macungie, PA | |
| Sep 1, 6:42 PM EDT | FLASH FLOOD | 1 Wnw Lowhill Twp, PA | FLOODING FORCED THE CLOSURE OF WERLEYS CORNER ROAD AND BAKE OVEN ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:43 PM EDT | FLASH FLOOD | 1 Sw Bushkill Twp, PA | FLOODING FORCED THE CLOSURE OF STATE ROUTE 512 NEAR CLEARFIELD ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:45 PM EDT | FLASH FLOOD | 1 Ne Montgomeryville, PA | FLOODING FORCED THE CLOSURE OF COUNTY LINE ROAD NEAR DOYLESTOWN ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:45 PM EDT | FLASH FLOOD | 2 Ssw Allentown, PA | THE GAUGE ON LITTLE LEHIGH CREEK NEAR ALLENTOWN (ALLP1) REACHED FLOOD STAGE AT 645 PM 9/1, CRESTING AT 9.82 FEET (MODERATE FLOODING) AT 1100 PM 9/1. |
| Sep 1, 6:45 PM EDT | FLASH FLOOD | Bethlehem Twp, PA | FLOODING FORCED THE CLOSURE OF EASTON AVENUE AS WELL AS WILLIAM PENN HIGHWAY, THIRTEENTH STREET, AND BUTLER STREET. TIME BASED ON DISPATCH REPORTS. |
| Sep 1, 6:48 PM EDT | FLASH FLOOD | 1 E Bloomsbury, NJ | FLOODING FORCED THE CLOSURE OF STATE HIGHWAY 173 EAST OF U.S. HIGHWAY 22. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 6:50 PM EDT | FLASH FLOOD | 1 W Hellertown, PA | FLOODING FORCED THE CLOSURE OF FRIEDENSVILLE ROAD AND HICKORY HILL ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:00 PM EDT | FLASH FLOOD | 1 Nnw Flourtown, PA | THE GAUGE ON WISSAHICKON CREEK AT FORT WASHINGTON (FTWP1) REACHED FLOOD STAGE AT 700 PM 9/1, CRESTING AT 17.78 FEET (MAJOR FLOODING) AT 1115 PM 9/1. |
| Sep 1, 7:10 PM EDT | FLASH FLOOD | 1 Ssw Ancient Oaks, PA | SPRING CREEK ROAD COMPLETELY UNDERWATER. |
| Sep 1, 7:10 PM EDT | FLASH FLOOD | 2 Ssw Richboro, PA | FLOODING CLOSED BRSTOL ROAD, OLD BRISTOL ROAD, CHINQUAPIN ROAD, AND GIBSON ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:15 PM EDT | FLASH FLOOD | 1 Nnw Bethlehem, PA | THE GAUGE ON MONOCACY CREEK AT BETHLEHEM (BTHP1) REACHED FLOOD STAGE AT 715 PM 9/1, CRESTING AT 5.47 FEET (MINOR FLOODING) AT 900 PM 9/1. |
| Sep 1, 7:15 PM EDT | FLASH FLOOD | 1 Sw Wrightstown Twp, PA | THE GAUGE ON NESHAMINY CREEK AT PENNS PARK (PEPP1) REACHED FLOOD STAGE AT 715 PM 9/1. |
| Sep 1, 7:15 PM EDT | FLASH FLOOD | 2 Ne Bloomsbury, NJ | THE GAUGE ON THE MUSCONETCONG RIVER AT BLOOMSBURY (BLBN4) REACHED FLOOD STAGE AT 715 PM 9/1, CRESTING AT 9.2 FEET (RECORD FLOODING) AT 945 PM 9/1. |
| Sep 1, 7:16 PM EDT | FLASH FLOOD | 2 Nnw New Tripoli, PA | FLASH FLOODING CLOSED STATE ROUTE 309 NEAR NEW TRIPOLI. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:20 PM EDT | FLASH FLOOD | 1 E Souderton, PA | FLOODING CLOSED STATE HIGHWAY 113 NEAR COUNTY LINE ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:26 PM EDT | FLASH FLOOD | 1 Ssw Forks Twp, PA | FLOODING CLOSED STATE HIGHWAY 611 NORTH OF U.S. HIGHWAY 22. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:30 PM EDT | FLASH FLOOD | 1 E Souderton, PA | FLOODING CLOSED BETHLEHEM PIKE NORTH OF STATE HIGHWAY 309. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:43 PM EDT | FLASH FLOOD | 1 S Perkiomenville, PA | STATE HIGHWAY 29 CLOSED SOUTH OF PERKIOMENVILLE. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:45 PM EDT | FLOOD | Walnutport, PA | THE GAUGE ON THE LEHIGH RIVER AT WALNUTPORT (WNTP1) REACHED FLOOD STAGE AT 745 PM 9/1, CRESTING AT 13.19 FEET (MODERATE FLOODING) AT 230 AM 9/2. |
| Sep 1, 7:49 PM EDT | HEAVY RAIN 6.45 | 1 Ssw Ancient Oaks, PA | |
| Sep 1, 7:50 PM EDT | FLASH FLOOD | Green Lane, PA | STATE HIGHWAY 63 EAST OF PERKIOMENVILLE CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:54 PM EDT | FLASH FLOOD | Sellersville, PA | DIAMOND STREET AND MAIN STREET CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:55 PM EDT | FLASH FLOOD | 1 Se Perkasie, PA | STATE HIGHWAY 152 BETWEEN SELLERSVILLE AND PERKASIE CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:57 PM EDT | FLASH FLOOD | 2 E East Rockhill Twp, PA | STATE HIGHWAY 313 CLOSED FROM FLOODING NEAR EAST BRANCH PERKIOMEN CREEK. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:59 PM EDT | FLASH FLOOD | 2 Wnw Upper Hanover Twp, PA | ADAMS ROAD AND PALM HILL ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 7:59 PM EDT | FLASH FLOOD | West Easton, PA | FLOODING CLOSED GLENDON HILL ROAD AND LEHIGH DRIVE. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 8:00 PM EDT | FLASH FLOOD | 1 Nnw Silverdale, PA | CALLOWHILL ROAD AT SOUTH PERKASIE ROAD IS STARTING TO WASH AWAY. |
| Sep 1, 8:02 PM EDT | FLASH FLOOD | 1 E Spring Mount, PA | FLOODING CLOSED SPRING MOUNT ROAD AND LEDERACH ROAD NEAR SCHWENKSVILLE ROAD. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:00 PM EDT | FLASH FLOOD | Skippack Twp, PA | *** 1 FATAL *** FLASH FLOODING SWEPT AWAY A CAR AND KILLED AN OCCUPANT IN SKIPPACK TWP. |
| Sep 1, 9:08 PM EDT | FLASH FLOOD | 2 Ene Bethlehem Twp, PA | FARMERSVILLE ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:11 PM EDT | FLASH FLOOD | 2 Ene Hilltown Twp, PA | HILLTOWN PIKE WASHED OUT FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:27 PM EDT | FLASH FLOOD | 2 Nnw Hereford Twp, PA | SAINT PETERS ROAD, BRUNNER ROAD, AND VERA CRUZ ROAD CLOSED FROM FLOODING. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:27 PM EDT | FLASH FLOOD | Chalfont, PA | FLASH FLOODING OF NESHAMINY CREEK FORCED THE CLOSURE OF BUTLER AVENUE. TIME BASED ON DISPATCH REPORT. |
| Sep 1, 9:45 PM EDT | FLASH FLOOD | Tatamy, PA | BUSHKILL CREEK HAS OVERFLOWED INTO BRADEN PARK. |
| Sep 1, 10:00 PM EDT | FLOOD | Bushkill Twp, PA | SEVERAL WATER RESCUES REPORTED ACROSS NORTHAMPTON COUNTY. ALSO MULTIPLE REPORTS OF TREES AND WIRES DOWN IN BUSHKILL TOWNSHIP POSSIBLY DUE TO SATURATED GROUND. REPORTED AT 2:17 AM. TIME ESTIMATED. |
| Sep 1, 10:00 PM EDT | FLASH FLOOD | Allentown, PA | THE GAUGE ON THE LITTLE LEHIGH CREEK AT ALLENTOWN (APAP1) REACHED FLOOD STAGE AT 1000 PM 9/1, CRESTING AT 9.6 FEET (MINOR FLOODING) AT 1130 PM 9/1. |
| Sep 1, 10:00 PM EDT | FLASH FLOOD | Milford Twp, PA | *** 1 FATAL *** ONE FATALITY FROM FLASH FLOODING IN MILFORD AFTER A VEHICLE BECAME STUCK IN FLOOD WATERS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 8.2 hours before the alert went out and 222 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
- 51 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1274 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 201 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
402
WGUS51 KPHI 012012
FFWPHI
NJC019-041-PAC011-017-077-091-095-020015-
/O.NEW.KPHI.FF.W.0068.210901T2012Z-210902T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
412 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southwestern Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
Northeastern Berks County in eastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Northampton County in eastern Pennsylvania...
Bucks County in southeastern Pennsylvania...
Montgomery County in southeastern Pennsylvania...
* Until 815 PM EDT.
* At 412 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen, and additional rainfall is expected this afternoon.
Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
* Some locations that may experience flash flooding include...
Allentown, Easton, Bethlehem, Norristown, Pottstown, Lansdale,
West Norriton, Forks, East Norriton, Emmaus, Northampton, and
Quakertown.
This includes the following highways...
Pennsylvania Turnpike between mile markers 334 and 344.
Interstate 78 in Pennsylvania between mile markers 45 and 76.
Interstate 78 in New Jersey between mile markers 0 and 9.
Northeast Extension between mile markers 21 and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4067 7587 4075 7574 4083 7538 4077 7510
4054 7498 4040 7495 4018 7502 4014 7516
4009 7523 4022 7559 4024 7560 4026 7571
4044 7568 4055 7570
FLASH FLOOD...RADAR INDICATED
$$
NC3 follow-up statements
390
WGUS51 KPHI 012145
FFWPHI
NJC019-041-PAC011-017-077-091-095-020300-
/O.EXT.KPHI.FF.W.0068.000000T0000Z-210902T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
545 PM EDT Wed Sep 1 2021
The National Weather Service in Mount Holly has extended the
* Flash Flood Warning for...
Southwestern Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
Northeastern Berks County in eastern Pennsylvania...
Lehigh County in eastern Pennsylvania...
Northampton County in eastern Pennsylvania...
Bucks County in southeastern Pennsylvania...
Montgomery County in southeastern Pennsylvania...
* Until 1100 PM EDT.
* At 545 PM EDT, local law enforcement reported thunderstorms
producing heavy rain across the warned area. Between 2 and 4
inches of rain have fallen. Flash flooding is already occurring.
HAZARD...Life threatening flash flooding caused by
thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
* Some locations that may experience flash flooding include...
Allentown, Easton, Bethlehem, Norristown, Pottstown, Lansdale,
West Norriton, Forks, East Norriton, Emmaus, Northampton, and
Quakertown.
This includes the following highways...
Pennsylvania Turnpike between mile markers 334 and 344.
Interstate 78 in Pennsylvania between mile markers 45 and 76.
Interstate 78 in New Jersey between mile markers 0 and 9.
Northeast Extension between mile markers 21 and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4067 7587 4075 7574 4083 7538 4077 7510
4054 7498 4040 7495 4018 7502 4014 7516
4009 7523 4022 7559 4024 7560 4026 7571
4044 7568 4055 7570
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CMS173
WGUS71 KPHI 020108
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
908 PM EDT Wed Sep 1 2021
NJC019-041-PAC011-017-077-091-095-020300-
/O.CON.KPHI.FF.W.0068.000000T0000Z-210902T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Warren NJ-Berks PA-Bucks PA-Lehigh PA-Montgomery PA-
Northampton PA-
908 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 11 PM EDT THIS
EVENING FOR SOUTHWESTERN HUNTERDON, SOUTHWESTERN WARREN,
NORTHEASTERN BERKS, LEHIGH, NORTHAMPTON, BUCKS, AND MONTGOMERY
COUNTIES...
At 908 PM EDT, local law enforcement reported flash flooding across
the warned area. Several roads are closed across the warned area,
and many rivers are in flood. Avoid travel in this area if at all
possible. Between 3 and 7 inches of rain have fallen. Flash flooding
is already occurring.
HAZARD...Life threatening flash flooding caused by heavy rain.
SOURCE...Law enforcement reported.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets, and underpasses.
Some locations that may experience flash flooding include...
Allentown, Easton, Bethlehem, Norristown, Pottstown, Lansdale,
West Norriton, Forks, East Norriton, Emmaus, Northampton, and
Quakertown.
This includes the following highways...
Pennsylvania Turnpike between mile markers 334 and 344.
Interstate 78 in Pennsylvania between mile markers 45 and 76.
Interstate 78 in New Jersey between mile markers 0 and 9.
Northeast Extension between mile markers 21 and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4067 7587 4075 7574 4083 7538 4077 7510
4054 7498 4040 7495 4018 7502 4014 7516
4009 7523 4022 7559 4024 7560 4026 7571
4044 7568 4055 7570
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CMS977
WGUS71 KPHI 020255
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1055 PM EDT Wed Sep 1 2021
NJC019-041-PAC011-017-077-091-095-020305-
/O.EXP.KPHI.FF.W.0068.000000T0000Z-210902T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Warren NJ-Berks PA-Bucks PA-Lehigh PA-Montgomery PA-
Northampton PA-
1055 PM EDT Wed Sep 1 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 11 PM EDT THIS EVENING FOR
SOUTHWESTERN HUNTERDON, SOUTHWESTERN WARREN, NORTHEASTERN BERKS,
LEHIGH, NORTHAMPTON, BUCKS, AND MONTGOMERY COUNTIES...
The flash flood warning has been replaced with a flood warning.
Flooding will continue through the night. Avoid unnecessary travel
in this area.
LAT...LON 4067 7587 4075 7574 4083 7538 4077 7510
4054 7498 4040 7495 4018 7502 4014 7516
4009 7523 4022 7559 4024 7560 4026 7571
4044 7568 4055 7570
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 6:19 AM EDT | Areal Flood Advisory | PHI | Chester, Delaware | 116 min |
| Sep 1, 6:49 AM EDT | Flash Flood Warning | PHI | Chester, Delaware, Philadelphia | 86 min |
| Sep 1, 11:24 AM EDT | Areal Flood Advisory | PHI | Berks, Carbon, Lehigh, Monroe, Northampton | 3 hr |
| Sep 1, 12:07 PM EDT | Flash Flood Warning | PHI | Carbon, Monroe | 4 hr |
| Sep 1, 1:29 PM EDT | Flash Flood Warning | PHI | Berks, Lehigh | 6 hr |
| Sep 1, 2:53 PM EDT | Flash Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 9 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Montgomery | 36 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Chester, Montgomery, Philadelphia | 43 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Montgomery, Philadelphia | 41 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Philadelphia | 39 hr |
| Sep 1, 3:55 PM EDT | River Flood Warning | PHI | Berks | 24 hr |
| Sep 1, 4:02 PM EDT | River Flood Warning | PHI | Monroe | 24 hr |
| Sep 1, 4:04 PM EDT | Areal Flood Warning | PHI | Carbon, Monroe, Northampton | 24 hr |
| Sep 1, 4:10 PM EDT | River Flood Warning | PHI | Monroe | 19 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 25 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Lehigh, Northampton | 24 hr |
| Sep 1, 4:12 PM EDT | River Flood Warning | PHI | Carbon | 15 hr |
| Sep 1, 4:13 PM EDT | Tornado Warning | PHI | Chester | 32 min |
| Sep 1, 4:20 PM EDT | River Flood Warning | PHI | Montgomery | 22 hr |
| Sep 1, 4:21 PM EDT | River Flood Warning | PHI | Bucks | 29 hr |
| Sep 1, 4:42 PM EDT | Flash Flood Warning | PHI | Chester, Delaware, Montgomery | 6 hr |
| Sep 1, 5:07 PM EDT | River Flood Warning | PHI | Chester | 17 hr |
| Sep 1, 5:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 47 min |
| Sep 1, 5:15 PM EDT | Tornado Warning | PHI | Delaware, Montgomery, Philadelphia | 30 min |
| Sep 1, 5:26 PM EDT | Flash Flood Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 9 hr |
| Sep 1, 5:34 PM EDT | Tornado Warning | PHI | Bucks, Montgomery, Philadelphia | 26 min |
| Sep 1, 5:42 PM EDT | Flash Flood Warning | PHI | Bucks | 10 hr |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Bucks | 33 min |
| Sep 1, 6:08 PM EDT | Flash Flood Warning | PHI | Monroe, Northampton | 6 hr |
| Sep 1, 6:20 PM EDT | Tornado Warning | PHI | Bucks | 40 min |
| Sep 1, 6:22 PM EDT | Tornado Warning | PHI | Philadelphia | 23 min |
| Sep 1, 6:38 PM EDT | River Flood Warning | PHI | Chester, Delaware | 26 hr |
| Sep 1, 6:42 PM EDT | Tornado Warning | PHI | Bucks, Philadelphia | 33 min |
| Sep 1, 6:59 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 61 min |
| Sep 1, 7:04 PM EDT | Tornado Warning | PHI | Bucks | 26 min |
| Sep 1, 7:05 PM EDT | Flash Flood Warning | PHI | Bucks | 8 hr |
| Sep 1, 7:22 PM EDT | Tornado Warning | PHI | Bucks | 11 min |
| Sep 1, 7:23 PM EDT | Areal Flood Warning | PHI | Berks, Lehigh | 14 hr |
| Sep 1, 7:31 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Sep 1, 7:53 PM EDT | River Flood Warning | PHI | Delaware | 13 hr |
| Sep 1, 3:23 AM EDT | Gale Warning | PHI | 32 hr | |
| Sep 1, 3:23 AM EDT | Small Craft Advisory | PHI | 41 hr | |
| Sep 1, 4:34 AM EDT | Rip Current Statement | PHI | Atlantic, Cape May, Monmouth, Ocean | 39 hr |
| Sep 1, 7:58 AM EDT | Severe Thunderstorm Warning | PHI | Burlington, Ocean | 47 min |
| Sep 1, 8:39 AM EDT | Severe Thunderstorm Warning | PHI | Monmouth, Ocean | 39 min |
| Sep 1, 9:11 AM EDT | Special Marine Warning | PHI | 64 min | |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Morris, Somerset | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 8 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 6 days |
| Sep 1, 4:27 PM EDT | River Flood Warning | PHI | Essex, Passaic | 21 days |
| Sep 1, 4:33 PM EDT | River Flood Warning | PHI | Morris, Passaic | 46 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 36 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Somerset | 22 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 42 hr |
| Sep 1, 4:40 PM EDT | River Flood Warning | PHI | Middlesex, Somerset | 48 hr |
| Sep 1, 4:41 PM EDT | River Flood Warning | PHI | Somerset | 61 hr |
| Sep 1, 5:33 PM EDT | Special Marine Warning | PHI | 27 min | |
| Sep 1, 5:35 PM EDT | Tornado Warning | PHI | Cumberland, Salem | 25 min |
| Sep 1, 5:57 PM EDT | Tornado Warning | PHI | Gloucester, Salem | 33 min |
| Sep 1, 6:05 PM EDT | Flash Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 10 hr |
| Sep 1, 6:14 PM EDT | Special Marine Warning | PHI | 61 min | |
| Sep 1, 7:28 PM EDT | Tornado Warning | PHI | Mercer, Middlesex, Morris, Somerset | 47 min |
| Sep 1, 7:44 PM EDT | Special Marine Warning | PHI | 61 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2021Flash Flood Warnings in New Jersey, 2021Every flash flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.