Alert archive / Pennsylvania / Flash Flood Warnings in 2026
Flash Flood Warning 50, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 18, 2026, 2:44 PM EDT for Bucks County, Montgomery County, 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
- Jul 18, 2026, 2:44 PM EDT (18:44 UTC)
- Expired
- Jul 18, 2026, 6:45 PM EDT
- In force
- 4 hr
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Flood severity
- None
Counties Bucks County, PA, Montgomery County, PA
The radar
The Philadelphia radar (KDIX), 68 km from the middle of the area, began a volume at 18:46 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.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 6.7 hours before the alert went out and 193 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
- 5 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1076 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted.
713
WGUS51 KPHI 181844
FFWPHI
PAC017-091-182245-
/O.NEW.KPHI.FF.W.0050.260718T1844Z-260718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
244 PM EDT Sat Jul 18 2026
The National Weather Service in Mount Holly has issued a
* Flash Flood Warning for...
Central Bucks County in southeastern Pennsylvania...
Central Montgomery County in southeastern Pennsylvania...
* Until 645 PM EDT.
* At 244 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.5 and 1.5 inches of
rain have fallen. The expected rainfall rate is 1 to 2 inches in 1
hour. Additional rainfall amounts of 0.5 to 1.5 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 may experience flash flooding include...
Ewing, Lansdale, East Norriton, Doylestown, Souderton, Chalfont,
Hatfield, New Hope, Yardley, Newtown, Dublin and Ivyland.
This includes Northeast Extension between mile markers 25 and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4041 7504 4040 7502 4041 7499 4040 7496
4034 7494 4030 7487 4025 7484 4024 7482
4016 7541 4031 7544
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Kruzdlo2 follow-up statements
505
WGUS71 KPHI 181958
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
358 PM EDT Sat Jul 18 2026
PAC091-182008-
/O.CAN.KPHI.FF.W.0050.000000T0000Z-260718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery PA-
358 PM EDT Sat Jul 18 2026
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL MONTGOMERY COUNTY...
Flooding is no longer expected to pose a threat.
A Flood Watch remains in effect until 200 AM EDT Sunday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4024 7482 4020 7512 4025 7520 4034 7494
4032 7491 4031 7488 4030 7487 4025 7484
$$
PAC017-182245-
/O.CON.KPHI.FF.W.0050.000000T0000Z-260718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-
358 PM EDT Sat Jul 18 2026
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM EDT THIS
EVENING FOR CENTRAL BUCKS COUNTY...
At 358 PM EDT, Doppler radar indicated earlier thunderstorms
produced 1.0 and 2.0 inches of rain across portions of the warned
area.
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...
Ewing, Yardley, Newtown, Ivyland, Richboro, Washington Crossing,
Woodside, Horsham and Newtown Grant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around...don't drown when encountering flooded roads. Most
flood deaths occur in vehicles.
&&
LAT...LON 4024 7482 4020 7512 4025 7520 4034 7494
4032 7491 4031 7488 4030 7487 4025 7484
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL RATE...1-2 INCHES IN 1 HOUR
$$
Kruzdlo002
WGUS71 KPHI 182242
FFSPHI
Flash Flood Statement
National Weather Service Mount Holly NJ
642 PM EDT Sat Jul 18 2026
PAC017-182252-
/O.EXP.KPHI.FF.W.0050.000000T0000Z-260718T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bucks PA-
642 PM EDT Sat Jul 18 2026
...FLASH FLOOD WARNING WILL EXPIRE AT 645 PM EDT THIS EVENING FOR
CENTRAL BUCKS COUNTY...
The heavy rain has ended at the moment. More is possible this
evening.
A Flood Watch remains in effect until 200 AM EDT Sunday for portions
of northern Delaware, New Jersey, and Pennsylvania.
&&
LAT...LON 4024 7482 4020 7512 4025 7520 4034 7494
4032 7491 4031 7488 4030 7487 4025 7484
$$
KruzdloThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 10:39 AM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 21 min |
| Jul 18, 3:13 PM EDT | Severe Thunderstorm Warning | PHI | Bucks | 47 min |
| Jul 18, 3:14 PM EDT | Flash Flood Warning | PHI | Bucks | 4 hr |
| Jul 18, 3:45 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 45 min |
| Jul 18, 5:45 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 45 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2026Every flash flood warning in 2026
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.