Alert archive / Pennsylvania / Areal Flood Advisories in 2021
Areal Flood Advisory 46, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this areal flood advisory at Jul 3, 2021, 2:03 PM EDT for Delaware County, Pennsylvania. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 3, 2021, 2:03 PM EDT (18:03 UTC)
- Expired
- Jul 3, 2021, 4:13 PM EDT
- In force
- 2 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
County Delaware County, PA
The radar
The Philadelphia radar (KDIX), 88 km from the middle of the area, began a volume at 18:06 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, 6.1 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 40 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
977
WGUS81 KPHI 031803
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
203 PM EDT Sat Jul 3 2021
PAC045-032115-
/O.NEW.KPHI.FA.Y.0046.210703T1803Z-210703T2115Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Delaware PA-
203 PM EDT Sat Jul 3 2021
The National Weather Service in Mount Holly has issued a
* Flood Advisory for...
Southwestern Delaware County in southeastern Pennsylvania...
* Until 515 PM EDT.
* At 203 PM EDT, Doppler radar indicated heavy rain due to
thunderstorms. Minor flooding is ongoing or expected to begin
shortly in the advisory area.
* Some locations that will experience flooding include...
Chester, Chelsea, Chester Township, Lima, Nether Providence
Township, Brookhaven, Upland, Chester Heights, Eddystone, Marcus
Hook, Parkside, and Trainer.
This includes the following highways...
Interstate 95 in Pennsylvania between mile markers 1 and 6.
Interstate 476 in Pennsylvania near mile marker 0.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.
&&
LAT...LON 3981 7540 3984 7550 3992 7552 3993 7547
3993 7543 3987 7534 3981 7539
$$
MPS1 follow-up statement
200
WGUS81 KPHI 032013
FLSPHI
Flood Advisory
National Weather Service Mount Holly NJ
413 PM EDT Sat Jul 3 2021
PAC045-032023-
/O.CAN.KPHI.FA.Y.0046.000000T0000Z-210703T2115Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Delaware PA-
413 PM EDT Sat Jul 3 2021
...FLOOD ADVISORY IS CANCELLED FOR SOUTHWESTERN DELAWARE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3981 7540 3984 7550 3992 7552 3993 7547
3993 7543 3987 7534 3981 7539
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 1:38 PM EDT | Special Weather Statement | PHI | Delaware | 52 min |
| Jul 3, 6:39 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 2 hr |
Nearby
Areal Flood Advisories in Pennsylvania, 2021Every areal flood advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.