Alert archive / Pennsylvania / Flash Flood Warnings in 2019

Flash Flood Warning 24, NWS Philadelphia/Mount Holly

June 19, 2019Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 19, 2019, 7:15 PM EDT for Berks County, Pennsylvania. It was in force for 2 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: Jun 19, 2019, 7:15 PM EDT (23:15 UTC)
Expired: Jun 19, 2019, 9:18 PM EDT
In force: 2 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 144 km from the middle of the area, began a volume at 23:17 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, 11.3 hours before the alert went out and 200 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: 39 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 826 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 66 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

450 
WGUS51 KPHI 192315
FFWPHI
PAC011-200515-
/O.NEW.KPHI.FF.W.0024.190619T2315Z-190620T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Mount Holly NJ has issued a

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

* Until 115 AM EDT Thursday.

* At 714 PM EDT, Doppler radar indicated showers and thunderstorms 
  producing heavy rain across the warned area. Flash flooding is 
  expected to begin shortly in the areas of heaviest rain.

* Some locations that could experience flooding include...
  Reading, Wyomissing, Fleetwood, Sinking Spring, Laureldale,
  Womelsdorf, Wernersville, Newmanstown, Leesport, Shoemakersville,
  Bernville, Spring Ridge, Fairview Hgts, Shillington, West Reading,
  Mount Penn, Mohnton, Kenhorst, St. Lawrence and Centerport.

Additional rainfall amounts of an inch or two 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 4056 7591 4037 7566 4019 7596 4031 7614
      4036 7621 4038 7625

$$

Iovino

1 follow-up statement

051 
WGUS71 KPHI 200118
FFSPHI

Flash Flood Statement
National Weather Service Mount Holly NJ
918 PM EDT Wed Jun 19 2019

PAC011-200127-
/O.CAN.KPHI.FF.W.0024.000000T0000Z-190620T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Berks PA-
918 PM EDT Wed Jun 19 2019

...THE FLASH FLOOD WARNING FOR CENTRAL BERKS COUNTY IS CANCELLED...

The heavy rain has ended. Flooding is no longer expected to pose a
threat.

LAT...LON 4056 7591 4037 7566 4019 7596 4031 7614
      4036 7621 4038 7625

$$

Iovino

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 3:17 AM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	43 hr
Jun 19, 4:11 PM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	94 min
Jun 19, 4:52 PM EDT	Areal Flood Advisory	PHI	Bucks, Philadelphia	94 min
Jun 19, 6:17 PM EDT	Flash Flood Warning	PHI	Bucks, Philadelphia	5 hr
Jun 19, 6:49 PM EDT	Flash Flood Warning	PHI	Philadelphia	4 hr
Jun 19, 6:56 PM EDT	Areal Flood Advisory	PHI	Berks	21 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.