Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 56, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Aug 22, 2021, 8:47 PM EDT for Monroe County, Northampton County, Pennsylvania; Sussex County, Warren County, New Jersey. It was in force for 6 hr. 11 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
- Aug 22, 2021, 8:47 PM EDT (00:47 UTC)
- Expired
- Aug 23, 2021, 2:45 AM EDT
- In force
- 6 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Binghamton radar (KBGM), 141 km from the middle of the area, began a volume at 00:46 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 |
|---|---|---|---|
| Aug 22, 9:26 PM EDT | FLASH FLOOD | Middle Smithfield Towns, PA | VEHICLES SUBMERGED IN RISING WATERS. BROWNOUTS AND FLOODED BASEMENTS. |
| Aug 22, 9:26 PM EDT | FLASH FLOOD | Smithfield Twp, PA | VEHICLES SUBMERGED IN RISING WATERS. BROWNOUTS AND FLOODED BASEMENTS. |
| Aug 22, 9:26 PM EDT | FLASH FLOOD | Stroud Twp, PA | VEHICLES SUBMERGED IN RISING WATERS. BROWNOUTS AND FLOODED BASEMENTS. |
| Aug 22, 10:14 PM EDT | FLASH FLOOD | 2 Se Delaware Water Gap, PA | FLOODING ON PA 611 BOTH DIRECTIONS BETWEEN STATE PARK AND MOUNTAIN RD, WARING DR. ALL LANES CLOSED. |
| Aug 22, 10:29 PM EDT | FLASH FLOOD | Tannersville, PA | FLOODING ON I-80 EASTBOUND BETWEEN EXIT 299: PA 715 - TANNERSVILLE AND EXIT 302B: PA 611 - BARTONSVILLE. ALL LANES CLOSED. |
| Aug 22, 10:47 PM EDT | FLASH FLOOD | 3 Ssw Upper Mount Bethe, PA | PA 611 CLOSED IN BOTH DIRECTIONS BETWEEN RIVERTON RD AND STATE PARK RD DUE TO FLOODING. ALL LANES CLOSED. |
| Aug 23, 12:00 AM EDT | FLASH FLOOD | 2 W Smithfield Twp, PA | FLASH FLOODING ON LITTLE SAMBO CREEK. PROPERTY DAMAGE ADJACENT TO ITS BANKS. |
| Aug 23, 12:00 AM EDT | HEAVY RAIN 4.86 | Stroudsburg, PA | STORM TOTAL SO FAR. |
| Aug 23, 12:00 AM EDT | HEAVY RAIN 4.95 | 2 W Smithfield Twp, PA | LITTLE SAMBO CREEK IS FLOODING WITH WATER AFFECTING RESIDENCES ON ITS BANKS. |
| Aug 23, 12:39 AM EDT | FLASH FLOOD | 1 Ese Jackson Twp, PA | MILLER ROAD AND GOLDEN SLIPPER ROAD CLOSED DUE TO FLOODING. ALL LANES CLOSED. |
| Aug 23, 1:30 AM EDT | FLOOD | 2 Nne Echo Lake, PA | THE GAUGE ON BUSH KILL AT SHOEMAKERS (SHOP1) REACHED FLOOD STAGE. |
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 00:00Z, 0.8 hours before the alert went out and 197 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
- 59 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 610 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- -66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
990
WGUS51 KPHI 230047
FFWPHI
NJC037-041-PAC089-095-230645-
/O.NEW.KPHI.FF.W.0056.210823T0047Z-210823T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
847 PM EDT Sun Aug 22 2021
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
West Central Sussex County in northwestern New Jersey...
Northwestern Warren County in northwestern New Jersey...
Northeastern Northampton County in eastern Pennsylvania...
Monroe County in northeastern Pennsylvania...
* Until 245 AM EDT.
* At 847 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.5 and 2.5 inches of
rain have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. 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 will experience flash flooding include...
Mount Pocono, East Stroudsburg, Tobyhanna, Blairstown, Bangor, Pen
Argyl, Wind Gap, East Bangor, Delaware Water Gap, Analomink,
Henryville, and Tannersville.
This includes the following highways...
Interstate 80 in New Jersey between mile markers 0 and 11.
Interstate 80 in Pennsylvania between mile markers 289 and 314.
Interstate 380 in Pennsylvania between mile markers 0 and 12.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 4114 7562 4122 7554 4125 7513 4115 7516
4114 7508 4108 7503 4112 7495 4107 7482
4096 7492 4086 7510 4079 7535
FLASH FLOOD...RADAR INDICATED
$$
MeolaThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 22, 8:11 PM EDT | Areal Flood Advisory | PHI | Carbon, Monroe, Northampton | 6 hr |
| Aug 22, 10:34 PM EDT | Areal Flood Advisory | PHI | Carbon, Lehigh, Northampton | 3 hr |
| Aug 22, 10:53 PM EDT | Flash Flood Warning | PHI | Carbon, Lehigh, Monroe, Montgomery, Northampton | 4 hr |
| Aug 22, 11:42 PM EDT | Areal Flood Advisory | PHI | Berks | 3 hr |
| Aug 23, 12:32 AM EDT | River Flood Warning | PHI | Monroe | 10 hr |
| Aug 23, 12:55 AM EDT | River Flood Warning | PHI | Monroe | 10 hr |
| Aug 23, 2:36 AM EDT | Areal Flood Warning | PHI | Carbon, Monroe | 21 hr |
| Aug 23, 3:50 AM EDT | River Flood Warning | PHI | Carbon | 3 hr |
| Aug 23, 3:50 AM EDT | River Flood Warning | PHI | Lehigh, Northampton | 11 hr |
| Aug 23, 8:28 AM EDT | Areal Flood Warning | PHI | Lehigh | 7 hr |
| Aug 23, 4:41 PM EDT | Special Weather Statement | PHI | Montgomery | 34 min |
| Aug 22, 11:27 PM EDT | Areal Flood Warning | PHI | Middlesex | 29 hr |
| Aug 23, 2:09 AM EDT | River Flood Warning | PHI | Morris, Passaic | 17 hr |
| Aug 23, 3:25 AM EDT | Areal Flood Warning | PHI | Morris | 8 hr |
| Aug 23, 4:10 AM EDT | River Flood Warning | PHI | Morris | 41 hr |
| Aug 23, 5:07 AM EDT | Areal Flood Warning | PHI | Warren | 21 hr |
| Aug 23, 5:22 AM EDT | Areal Flood Warning | PHI | Somerset | 9 hr |
| Aug 23, 5:44 AM EDT | Areal Flood Warning | PHI | Hunterdon | 7 hr |
| Aug 23, 7:20 AM EDT | River Flood Warning | PHI | Hunterdon, Somerset | 7 hr |
| Aug 23, 7:47 AM EDT | River Flood Warning | PHI | Morris, Passaic | 13 hr |
| Aug 23, 8:36 AM EDT | Areal Flood Warning | PHI | Somerset | 9 hr |
| Aug 23, 8:42 AM EDT | River Flood Warning | PHI | Middlesex, Somerset | 21 hr |
| Aug 23, 11:22 AM EDT | River Flood Warning | PHI | Middlesex, Somerset | 16 hr |
| Aug 23, 11:32 AM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 5 days |
| Aug 23, 11:58 AM EDT | River Flood Warning | PHI | Somerset | 15 hr |
| Aug 23, 12:19 PM EDT | River Flood Warning | PHI | Burlington | 33 hr |
| Aug 23, 12:51 PM EDT | Coastal Flood Statement | PHI | Ocean | 3 hr |
| Aug 23, 2:26 PM EDT | Areal Flood Warning | PHI | Sussex | 14 hr |
| Aug 23, 2:26 PM EDT | Special Weather Statement | PHI | Ocean | 49 min |
| Aug 23, 3:12 PM EDT | Special Weather Statement | PHI | Ocean | 33 min |
| Aug 23, 3:15 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 45 min |
| Aug 23, 3:18 PM EDT | Special Marine Warning | PHI | 57 min | |
| Aug 23, 3:38 PM EDT | River Flood Warning | PHI | Essex, Morris, Passaic | 48 hr |
| Aug 23, 4:47 PM EDT | Special Weather Statement | PHI | Atlantic | 28 min |
| Aug 23, 4:50 PM EDT | Special Marine Warning | PHI | 55 min | |
| Aug 23, 5:13 PM EDT | Special Weather Statement | PHI | Camden | 32 min |
| Aug 23, 5:39 PM EDT | Special Marine Warning | PHI | 33 min | |
| Aug 23, 6:46 PM EDT | Special Marine Warning | PHI | 64 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.