Alert archive / Pennsylvania / Flash Flood Warnings in 2022
Flash Flood Warning 20, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 13, 2022, 7:21 PM EDT for 4 counties in Pennsylvania. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Oct 13, 2022, 7:21 PM EDT (23:21 UTC)
- Expired
- Oct 13, 2022, 11:30 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bucks County, PA, Chester County, PA, Lehigh County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 110 km from the middle of the area, began a volume at 23:24 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, 11.4 hours before the alert went out and 214 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
- 502 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 272 m²/s²
- 0-3 km storm-relative helicity
- 283 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
802
WGUS51 KPHI 132321
FFWPHI
PAC017-029-077-091-140330-
/O.NEW.KPHI.FF.W.0020.221013T2321Z-221014T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
721 PM EDT Thu Oct 13 2022
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Southern Lehigh County in eastern Pennsylvania...
Western Bucks County in southeastern Pennsylvania...
Northeastern Chester County in southeastern Pennsylvania...
Northwestern Montgomery County in southeastern Pennsylvania...
* Until 1130 PM EDT.
* At 721 PM EDT, Doppler radar and automated rain gauges indicated
heavy rain falling and flooding occurring at Perkiomen Creek at
East Greenville. Between 1 and 2 inches of rain have fallen.
Additional rainfall amounts of 0.5 to 1 inch are possible in the
warned area. Flash flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar and automated gauges.
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...
Pottstown, Phoenixville, Royersford, Trappe, East Greenville,
Schwenksville, Green Lane, Gilbertsville, Spring Mount,
Cedarville, Pughtown, and Geryville.
This includes the following highways...
Pennsylvania Turnpike between mile markers 317 and 318.
Northeast Extension between mile markers 37 and 44.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4024 7570 4026 7568 4027 7567 4028 7567
4033 7563 4036 7560 4038 7559 4040 7557
4042 7555 4049 7549 4039 7534 4006 7557
4016 7577 4023 7571
FLASH FLOOD...RADAR AND GAUGE INDICATED
$$
SFJ2 follow-up statements
521
WGUS71 KPHI 140021
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
821 PM EDT Thu Oct 13 2022
PAC017-029-077-091-140330-
/O.CON.KPHI.FF.W.0020.000000T0000Z-221014T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Chester PA-Lehigh PA-Montgomery PA-
821 PM EDT Thu Oct 13 2022
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM EDT THIS
EVENING FOR SOUTHERN LEHIGH, WESTERN BUCKS, NORTHEASTERN CHESTER,
AND NORTHWESTERN MONTGOMERY COUNTIES...
At 821 PM EDT, gauge reports indicated that flash flooding was
occurring on the Perkiomen Creek at East Greenville. Between 1.5 and
3 inches of rain have fallen. Although the heaviest rain has left
the warned area, it will take time for runoff to subside.
Additionally, light rain with amounts up to 0.5 inches are possible
over the next hour. Flash flooding is already occurring.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Gauges reported.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets, and underpasses as well as other
drainage and low lying areas.
Some locations that may experience flash flooding include...
Pottstown, Phoenixville, Royersford, Trappe, East Greenville,
Schwenksville, Green Lane, Gilbertsville, Spring Mount,
Cedarville, Pughtown, and Geryville.
This includes the following highways...
Pennsylvania Turnpike near mile marker 317.
Northeast Extension between mile markers 37 and 45.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 4024 7570 4026 7568 4027 7567 4028 7567
4033 7563 4036 7560 4038 7559 4040 7557
4042 7555 4049 7549 4039 7534 4006 7557
4016 7577 4023 7571
FLASH FLOOD...GAUGE INDICATED
$$
SFJ240
WGUS71 KPHI 140331
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
1131 PM EDT Thu Oct 13 2022
PAC017-029-077-091-140341-
/O.EXP.KPHI.FF.W.0020.000000T0000Z-221014T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-Chester PA-Lehigh PA-Montgomery PA-
1131 PM EDT Thu Oct 13 2022
...FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHERN LEHIGH, WESTERN
BUCKS, NORTHEASTERN CHESTER, AND NORTHWESTERN MONTGOMERY COUNTIES...
Flood waters have receded. Flooding is no longer expected to pose a
threat.
LAT...LON 4024 7570 4026 7568 4027 7567 4028 7567
4033 7563 4036 7560 4038 7559 4040 7557
4042 7555 4049 7549 4039 7534 4006 7557
4016 7577 4023 7571
$$
MPSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 5:18 PM EDT | Areal Flood Advisory | PHI | Chester | 38 min |
| Oct 13, 5:55 PM EDT | Special Weather Statement | PHI | Lehigh | 35 min |
| Oct 13, 6:25 PM EDT | Special Weather Statement | PHI | Northampton | 35 min |
| Oct 13, 7:34 PM EDT | Areal Flood Advisory | PHI | Bucks, Lehigh, Northampton | 3 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.