Alert archive / New Jersey / Areal Flood Warnings in 2021
Areal Flood Warning 44, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood warning at Sep 2, 2021, 3:52 AM EDT for 5 counties in New Jersey; Bucks County, Pennsylvania. It was in force for 8 hr. 2 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 2, 2021, 3:52 AM EDT (07:52 UTC)
- Expired
- Sep 2, 2021, 12:15 PM EDT
- In force
- 8 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hunterdon County, NJ, Mercer County, NJ, Morris County, NJ, Somerset County, NJ, Warren County, NJ, Bucks County, PA
The radar
The Philadelphia radar (KDIX), 53 km from the middle of the area, began a volume at 07:54 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 2, 4:53 AM EDT | HEAVY RAIN 5.7 | Washington, NJ | |
| Sep 2, 12:15 PM EDT | FLOOD | 2 Ne Solebury Twp, PA | THE GAUGE ON THE DELAWARE RIVER AT STOCKTON (STKN4) REACHED FLOOD STAGE AT 1215 PM 9/2, CRESTING AT 19.32 FEET (MINOR FLOODING) AT 645 PM 9/2. |
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, 7.9 hours before the alert went out and 179 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
- 123 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 512 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 279 m²/s²
- 0-3 km storm-relative helicity
- 456 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
126
WGUS41 KPHI 020752
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Flood Warning
National Weather Service Mount Holly NJ
352 AM EDT Thu Sep 2 2021
NJC019-021-027-035-041-PAC017-021700-
/O.NEW.KPHI.FA.W.0044.210902T0752Z-210902T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Morris NJ-Somerset NJ-Warren NJ-Bucks PA-
352 AM EDT Thu Sep 2 2021
The National Weather Service in Mount Holly has issued a
* Flood Warning for...
Western Mercer County in central New Jersey...
Southwestern Morris County in northern New Jersey...
Western Somerset County in northern New Jersey...
Hunterdon County in northwestern New Jersey...
Southwestern Warren County in northwestern New Jersey...
Eastern Bucks County in southeastern Pennsylvania...
* Until 100 PM EDT Thursday.
* At 352 AM EDT, local law enforcement reported widespread flooding
continuing across the warning area. Many roads are closed, and
several rivers and streams are in flood. Flooding will continue
for several more hours. Please heed road closures!
* Some locations that may experience flooding include...
Trenton, Ewing, Burlington, Bristol, Byram, Washington,
Flemington, High Bridge, Clinton, Pennington, New Hope, and
Yardley.
This includes the following highways...
Pennsylvania Turnpike between mile markers 352 and 359.
Interstate 95 in Pennsylvania between mile markers 38 and 40.
Interstate 78 in New Jersey between mile markers 6 and 27.
Interstate 295 in New Jersey between mile markers 59 and 62...and
between mile markers 68 and 76.
Interstate 195 in New Jersey between mile markers 0 and 1.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4078 7512 4078 7489 4073 7472 4018 7470
4018 7471 4017 7471 4017 7470 4016 7471
4012 7478 4013 7482 4010 7484 4009 7486
4008 7486 4008 7488 4019 7506
$$
CMS1 follow-up statement
477
WGUS81 KPHI 021615
FLSPHI
Flood Statement
National Weather Service Mount Holly NJ
1215 PM EDT Thu Sep 2 2021
NJC019-021-027-035-041-PAC017-021625-
/O.CAN.KPHI.FA.W.0044.000000T0000Z-210902T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hunterdon NJ-Mercer NJ-Morris NJ-Somerset NJ-Warren NJ-Bucks PA-
1215 PM EDT Thu Sep 2 2021
...FLOOD WARNING IS CANCELLED FOR WESTERN MERCER, SOUTHWESTERN
MORRIS, WESTERN SOMERSET, HUNTERDON, SOUTHWESTERN WARREN, AND
EASTERN BUCKS COUNTIES...
This flood warning has been cancelled. Additional flood warnings
remain in place across the area.
LAT...LON 4078 7512 4078 7489 4073 7472 4018 7470
4018 7471 4017 7471 4017 7470 4016 7471
4012 7478 4013 7482 4010 7484 4009 7486
4008 7486 4008 7488 4019 7506
$$
KruzdloThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 8:02 PM EDT | Flash Flood Warning | PHI | Middlesex, Morris, Somerset | 5 hr |
| Sep 1, 9:01 PM EDT | Flash Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 5 hr |
| Sep 1, 9:43 PM EDT | River Flood Warning | PHI | Mercer | 33 hr |
| Sep 1, 10:05 PM EDT | Flash Flood Warning | PHI | Morris, Somerset | 4 hr |
| Sep 1, 10:23 PM EDT | Coastal Flood Statement | PHI | Ocean | 13 hr |
| Sep 1, 10:24 PM EDT | Flash Flood Warning | PHI | Burlington, Camden, Gloucester | 4 hr |
| Sep 1, 10:29 PM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 49 hr |
| Sep 1, 10:32 PM EDT | River Flood Warning | PHI | Mercer | 31 hr |
| Sep 1, 10:35 PM EDT | River Flood Warning | PHI | Bergen, Morris, Passaic | 30 hr |
| Sep 1, 10:37 PM EDT | River Flood Warning | PHI | Morris, Passaic | 41 hr |
| Sep 1, 10:38 PM EDT | River Flood Warning | PHI | Morris, Somerset | 21 days |
| Sep 1, 10:47 PM EDT | Areal Flood Warning | PHI | Warren | 23 hr |
| Sep 1, 10:52 PM EDT | Areal Flood Warning | PHI | Hunterdon, Warren | 12 hr |
| Sep 2, 12:01 AM EDT | Areal Flood Warning | PHI | Hunterdon, Morris, Sussex, Warren | 40 hr |
| Sep 2, 12:28 AM EDT | Areal Flood Advisory | PHI | Atlantic, Burlington, Camden, Gloucester | 3 hr |
| Sep 2, 12:31 AM EDT | Areal Flood Advisory | PHI | Monmouth, Ocean | 2 hr |
| Sep 2, 1:38 AM EDT | Areal Flood Warning | PHI | Burlington, Mercer, Middlesex, Monmouth, Ocean | 4 hr |
| Sep 2, 1:52 AM EDT | Areal Flood Warning | PHI | Morris, Somerset | 13 hr |
| Sep 2, 2:23 AM EDT | Areal Flood Warning | PHI | Burlington, Camden, Gloucester, Salem | 9 hr |
| Sep 2, 2:29 AM EDT | Areal Flood Warning | PHI | Burlington, Camden, Gloucester | 5 hr |
| Sep 2, 3:53 AM EDT | Areal Flood Warning | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset | 8 hr |
| Sep 2, 4:00 AM EDT | River Flood Warning | PHI | Morris | 48 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Warren | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon | 37 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon | 33 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Hunterdon, Mercer | 34 hr |
| Sep 2, 4:45 AM EDT | River Flood Warning | PHI | Sussex, Warren | 5 hr |
| Sep 2, 6:05 AM EDT | Coastal Flood Warning | PHI | Burlington, Camden, Gloucester, Mercer | 6 hr |
| Sep 2, 1:20 PM EDT | Areal Flood Warning | PHI | Middlesex | 21 hr |
| Sep 2, 6:44 PM EDT | Coastal Flood Advisory | PHI | Burlington, Camden, Gloucester | 7 hr |
| Sep 1, 8:29 PM EDT | River Flood Warning | PHI | Lehigh | 10 hr |
| Sep 1, 9:47 PM EDT | River Flood Warning | PHI | Berks | 18 hr |
| Sep 1, 10:42 PM EDT | Areal Flood Warning | PHI | Berks, Bucks, Montgomery | 12 hr |
| Sep 1, 11:38 PM EDT | Areal Flood Warning | PHI | Berks, Chester, Delaware, Montgomery | 10 hr |
| Sep 2, 2:41 AM EDT | Areal Flood Warning | PHI | Bucks | 14 hr |
| Sep 2, 5:02 AM EDT | River Flood Warning | PHI | Lehigh | 11 hr |
Nearby
Areal Flood Warnings in New Jersey, 2021Areal Flood Warnings in Pennsylvania, 2021Every areal 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.