Alert archive / Pennsylvania / Flash Flood Warnings in 2025

Flash Flood Warning 27, NWS Philadelphia/Mount Holly

June 30, 2025Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 30, 2025, 11:20 PM EDT for Berks County, Pennsylvania. It was in force for 4 hr. 4 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: Jun 30, 2025, 11:20 PM EDT (03:20 UTC)
Expired: Jul 1, 2025, 3:30 AM EDT
In force: 4 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 145 km from the middle of the area, began a volume at 03:22 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
Jun 30, 11:51 PM EDT	FLOOD	Reading, PA	1 vehicle stuck under Spring Street underpass due to flooding. Fire Department has since cleared the scene.
Jul 1, 12:23 AM EDT	FLOOD	1 Sw Robesonia, PA	Vehicle stuck in the water.
Jul 1, 12:42 AM EDT	FLOOD	Leesport, PA	Traffic Advisory - 61 NB Closed Due To Flooding.
Jul 1, 1:30 AM EDT	FLOOD	Strausstown, PA	Spotter Network: Interstate 78 is flooding under bridges.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 3.3 hours before the alert went out and 208 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2011 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

As transmitted.

539 
WGUS51 KPHI 010320
FFWPHI
PAC011-010730-
/O.NEW.KPHI.FF.W.0027.250701T0320Z-250701T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1120 PM EDT Mon Jun 30 2025

The National Weather Service in Mount Holly has issued a

* Flash Flood Warning for...
  Berks County in eastern Pennsylvania...

* Until 330 AM EDT.

* At 1120 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1 inch of rain 
  has fallen. Additional rainfall amounts of 1 to 2 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...
  Reading, Wyomissing, Birdsboro, Kutztown, Hamburg, Fleetwood, 
  Sinking Spring, Laureldale, Womelsdorf, Wernersville, Topton and 
  Robesonia.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4024 7571 4014 7588 4049 7642 4052 7634
      4054 7617 4058 7604 4057 7602 4064 7599
      4067 7590 4044 7553

FLASH FLOOD...RADAR INDICATED

$$

Fitzsimmons

2 follow-up statements

730 
WGUS71 KPHI 010615
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
215 AM EDT Tue Jul 1 2025

PAC011-010730-
/O.CON.KPHI.FF.W.0027.000000T0000Z-250701T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
215 AM EDT Tue Jul 1 2025

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 330 AM EDT EARLY THIS 
MORNING FOR BERKS COUNTY...

At 215 AM EDT, The heaviest of the rain has tapered off but it 
brought 1 to 2 inches of rainfall with streamflows remaining high. 
For this reason the Flash Flood Warning remains in effect at this 
time.



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...
  Reading, Wyomissing, Birdsboro, Kutztown, Hamburg, Fleetwood, 
  Sinking Spring, Laureldale, Womelsdorf, Wernersville, Topton and 
  Robesonia.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4024 7571 4014 7588 4049 7642 4052 7634
      4054 7617 4058 7604 4057 7602 4064 7599
      4067 7590 4044 7553

FLASH FLOOD...RADAR INDICATED

$$

Fitzsimmons

866 
WGUS71 KPHI 010727
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
327 AM EDT Tue Jul 1 2025

PAC011-010737-
/O.EXP.KPHI.FF.W.0027.000000T0000Z-250701T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
327 AM EDT Tue Jul 1 2025

...FLASH FLOOD WARNING WILL EXPIRE AT 330 AM EDT EARLY THIS MORNING 
FOR BERKS COUNTY...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

&&

LAT...LON 4049 7642 4052 7634 4052 7626 4054 7617
      4058 7604 4057 7602 4064 7599 4067 7590
      4044 7553 4024 7571 4014 7588 4036 7621

$$

Fitzsimmons

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 11:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Delaware, Montgomery	43 min
Jul 1, 12:38 AM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware	36 min
Jul 1, 2:30 AM EDT	Flood Watch	PHI	Berks, Bucks, Chester, Delaware, Montgomery, Philadelphia	19 hr
Jul 1, 6:15 AM EDT	River Flood Warning	PHI	Chester	3 hr
Jul 1, 6:21 AM EDT	Areal Flood Warning	PHI	Delaware	2 hr
Jul 1, 2:32 PM EDT	Severe Thunderstorm Warning	PHI	Chester	43 min
Jul 1, 2:58 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Montgomery, Philadelphia	47 min
Jul 1, 3:00 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 1, 3:06 PM EDT	River Flood Warning	PHI	Chester, Delaware	8 hr
Jul 1, 3:31 PM EDT	Flash Flood Warning	PHI	Bucks, Montgomery, Philadelphia	4 hr
Jul 1, 3:34 PM EDT	Severe Thunderstorm Warning	PHI	Berks	56 min
Jul 1, 3:39 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	66 min
Jul 1, 4:27 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Chester, Lehigh, Montgomery	63 min
Jul 1, 4:44 PM EDT	Flash Flood Warning	PHI	Chester	4 hr
Jul 1, 4:47 PM EDT	Tornado Warning	PHI	Berks, Montgomery	28 min
Jul 1, 4:55 PM EDT	Flash Flood Warning	PHI	Berks, Chester, Montgomery	4 hr
Jul 1, 5:07 PM EDT	Severe Thunderstorm Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	38 min
Jul 1, 5:14 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Lehigh, Montgomery	4 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2025 Every flash flood warning in 2025

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.