Alert archive / Pennsylvania / Flash Flood Warnings in 2019

Flash Flood Warning 27, NWS Philadelphia/Mount Holly

June 19, 2019Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 19, 2019, 11:34 PM EDT for Berks County, Pennsylvania. It was in force for 6 hr. 13 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 19, 2019, 11:34 PM EDT (03:34 UTC)
Expired: Jun 20, 2019, 5:30 AM EDT
In force: 6 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 152 km from the middle of the area, began a volume at 03:33 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 19, 11:55 PM EDT	FLOOD	Wernersville, PA	WIDESPREAD ROADWAY FLOODING.
Jun 20, 12:24 AM EDT	FLASH FLOOD	Robesonia, PA	WATER RESCUE AT CHURCH STREET NEAR RAILROAD CROSSING. SOCIAL MEDIA PHOTO SHOWS WATER ABOUT TWO FEET FROM THE BASE OF THE OVERPASS.
Jun 20, 12:25 AM EDT	FLASH FLOOD	2 Nne Marion Twp, PA	CREWS DISPATCHED TO THE 200 BLOCK OF HOST CHURCH RD FOR A WATER RESCUE OF A CAR STRANDED IN HIGH WATER.
Jun 20, 12:42 AM EDT	FLASH FLOOD	1 Sw Reading, PA	SEVERAL WATER RESCUES REPORTED IN THE AREA OF LANCASTER AVENUE AND MORGANTOWN ROAD.
Jun 20, 12:57 AM EDT	FLASH FLOOD	1 W Kenhorst, PA	REPORTS OF FLOODED RESIDENCES AND SEVERAL WATER RESCUES IN CUMRU TWP.
Jun 20, 1:00 AM EDT	FLASH FLOOD	1 Sw Mohnton, PA	A DRIVEWAY ON YORKSHIRE ROAD WAS WASHED OUT, STRANDING TWO CARS FURTHER UP THE DRIVEWAY. DELAYED REPORT FROM THURSDAY MORNING. TIME ESTIMATED.
Jun 20, 1:01 AM EDT	FLASH FLOOD	Wyomissing, PA	SEVERAL WATER RESCUES REQUIRED AT SUNNYSIDE AVENUE AND PARK ROAD.
Jun 20, 1:30 AM EDT	FLASH FLOOD	1 Ssw West Reading, PA	THE READING PUBLIC MUSEUM WAS DAMAGED FROM FLASH FLOODING. TREES WERE UPROOTED ON AND NEAR THE PROPERTY, AND A METAL SCULPTURE WAS WASHED AWAY. TIME ESTIMATED FROM RADAR AND NEARBY REPORTS.
Jun 20, 1:33 AM EDT	FLASH FLOOD	1 Sse Muhlenberg Twp, PA	SEVERAL CARS STALLED AND WATER RESCUES REQUIRED NEAR ROUTE 12 AND 5TH STREET.
Jun 20, 1:50 AM EDT	FLASH FLOOD	Wyomissing, PA	RESIDENTS OF CAMBRIDGE COMMONS APARTMENTS NEEDING RESCUE WITH 6 FEET OF WATER REPORTED IN THE BUILDING.
Jun 20, 1:52 AM EDT	FLASH FLOOD	1 N Shillington, PA	SEVERAL REPORTS OF FLASH FLOODING IN THIS AREA. A 24-HOUR STORE WAS FLOODED WITH SEVERAL PEOPLE STUCK INSIDE THE BUILDING. SEVERAL CARS WERE STUCK IN WATER NEAR THIS LOCATION AND IN KENHORST BORO AS WELL.
Jun 20, 2:00 AM EDT	FLASH FLOOD	Spring Twp, PA	WATER RESCUE ON ROUTE 724 WITH THE ROAD UNDER TWO TO THREE FEET OF WATER. TIME ESTIMATED BASED ON SOCIAL MEDIA REPORTS.
Jun 20, 2:30 AM EDT	FLASH FLOOD	1 W Douglass Twp, PA	CORRECTS TIME OF PREVIOUS FLASH FLOOD REPORT FROM 1 W DOUGLASS TWP. MANATAWNEY CREEK BRIDGE ON STATE HIGHWAY 562 WASHED OUT. TIME ESTIMATED FROM NEARBY REPORTS OF FLOODING.

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, 3.6 hours before the alert went out and 204 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: 1341 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1152 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

As transmitted.

453 
WGUS51 KPHI 200334
FFWPHI
PAC011-200930-
/O.NEW.KPHI.FF.W.0027.190620T0334Z-190620T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Mount Holly NJ
1134 PM EDT Wed Jun 19 2019

The National Weather Service in Mount Holly NJ has issued a

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

* Until 530 AM EDT.

* At 1130 PM EDT, Doppler radar indicated showers and thunderstorms 
  producing heavy rain across the warned area. Up to an inch or two 
  of rain has already fallen. Flash flooding is expected to begin 
  shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Reading, Wyomissing, Birdsboro, Kutztown, Hamburg, Fleetwood,
  Sinking Spring, Laureldale, Womelsdorf, Wernersville, Newmanstown,
  Topton, Leesport, Shoemakersville, Bally, Bernville, Bechtelsville,
  Lyons, Strausstown and Lenhartsville.

Additional rainfall amounts of 2 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other poor drainage areas and low lying spots.

&&

LAT...LON 4052 7634 4052 7625 4058 7605 4057 7602
      4064 7598 4068 7589 4044 7553 4025 7569
      4014 7587 4036 7621 4037 7623 4049 7643

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 9:09 PM EDT	Areal Flood Warning	PHI	Philadelphia	3 hr
Jun 19, 9:50 PM EDT	Special Weather Statement	PHI	Lebanon	55 min
Jun 19, 10:47 PM EDT	Areal Flood Advisory	PHI	Berks	50 min
Jun 19, 11:11 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	6 hr
Jun 20, 12:39 AM EDT	Areal Flood Advisory	PHI	Montgomery	7 min
Jun 20, 12:45 AM EDT	Flash Flood Warning	PHI	Montgomery, Philadelphia	6 hr
Jun 20, 3:40 AM EDT	River Flood Warning	PHI	Delaware	111 min
Jun 20, 3:59 AM EDT	River Flood Warning	PHI	Chester	7 hr
Jun 20, 5:10 AM EDT	Areal Flood Warning	PHI	Chester, Delaware	12 hr
Jun 20, 5:19 AM EDT	River Flood Warning	PHI	Chester, Delaware	13 hr
Jun 20, 5:24 AM EDT	Areal Flood Warning	PHI	Berks	6 hr
Jun 20, 6:14 AM EDT	Areal Flood Warning	PHI	Montgomery, Philadelphia	10 hr
Jun 20, 6:31 AM EDT	River Flood Warning	PHI	Delaware	3 hr
Jun 20, 1:24 PM EDT	Special Weather Statement	PHI	Berks, Chester, Montgomery	51 min
Jun 20, 1:28 PM EDT	Areal Flood Advisory	PHI	Berks	4 hr
Jun 20, 2:13 PM EDT	Areal Flood Advisory	PHI	Berks, Bucks, Chester, Delaware, Lehigh, Montgomery	4 hr
Jun 20, 2:26 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	94 min
Jun 20, 2:33 PM EDT	Severe Thunderstorm Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	57 min
Jun 20, 2:48 PM EDT	Flash Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr
Jun 20, 3:20 PM EDT	Flash Flood Warning	PHI	Bucks	4 hr
Jun 20, 4:58 PM EDT	River Flood Warning	PHI	Chester	4 hr
Jun 20, 6:33 PM EDT	Areal Flood Warning	PHI	Montgomery	3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2019 Every flash flood warning in 2019

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.