Alert archive / Pennsylvania / Flash Flood Warnings in 2022
Flash Flood Warning 7, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 28, 2022, 9:20 PM EDT for Bucks County, Montgomery County, Philadelphia County, Pennsylvania. It was in force for 92 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 28, 2022, 9:20 PM EDT (01:20 UTC)
- Expired
- Jul 28, 2022, 10:52 PM EDT
- In force
- 92 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bucks County, PA, Montgomery County, PA, Philadelphia County, PA
The radar
The Philadelphia radar (KDIX), 57 km from the middle of the area, began a volume at 01:19 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 00:00Z, 1.3 hours before the alert went out and 235 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
- 0 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted.
455
WGUS51 KPHI 290120
FFWPHI
PAC017-091-101-290530-
/O.NEW.KPHI.FF.W.0007.220729T0120Z-220729T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
920 PM EDT Thu Jul 28 2022
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southern Bucks County in southeastern Pennsylvania...
Southeastern Montgomery County in southeastern Pennsylvania...
Central Philadelphia County in southeastern Pennsylvania...
* Until 130 AM EDT.
* At 920 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. 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...
Philadelphia, Bensalem, Burlington, Bristol, Conshohocken,
Palmyra, Beverly, Wissinoming, Tacony, Holmesburg, Germantown, and
Andalusia.
This includes the following highways...
Interstate 95 in Pennsylvania between mile markers 27 and 39.
Interstate 76 in Pennsylvania between mile markers 333 and 338.
This includes the following streams and drainages...
Crosswicks-Neshaminy, Schuylkill, and Lower Delaware.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4003 7533 4008 7530 4008 7523 4006 7507
4009 7500 4013 7490 4010 7484 4008 7486
4006 7494 4005 7498 4002 7501 4000 7508
FLASH FLOOD...RADAR INDICATED
$$
RCM1 follow-up statement
132
WGUS71 KPHI 290252
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1052 PM EDT Thu Jul 28 2022
PAC017-091-101-290302-
/O.CAN.KPHI.FF.W.0007.000000T0000Z-220729T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Montgomery PA-Philadelphia PA-
1052 PM EDT Thu Jul 28 2022
...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHERN BUCKS, SOUTHEASTERN
MONTGOMERY, AND CENTRAL PHILADELPHIA COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat.
LAT...LON 4003 7533 4008 7530 4008 7523 4006 7507
4013 7490 4010 7484 4008 7486 4007 7493
4005 7498 4002 7501 4000 7508
$$
RCMThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 8:07 PM EDT | Severe Thunderstorm Warning | PHI | Chester, Delaware, Montgomery, Philadelphia | 53 min |
| Jul 28, 8:44 PM EDT | Areal Flood Advisory | PHI | Bucks, Delaware, Montgomery, Philadelphia | 2 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 2022Every flash flood warning in 2022
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.