Alert archive / Pennsylvania / Flash Flood Warnings in 2014

Flash Flood Warning 17, NWS Philadelphia/Mount Holly

July 2, 2014Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 2, 2014, 5:31 PM EDT for Berks 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 2, 2014, 5:31 PM EDT (21:31 UTC)
Expired: Jul 2, 2014, 9:30 PM 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), 147 km from the middle of the area, began a volume at 21:31 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

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.5 hours before the alert went out and 100 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: 1420 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 52 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

351 
WGUS51 KPHI 022131
FFWPHI
PAC011-030130-
/O.NEW.KPHI.FF.W.0017.140702T2131Z-140703T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
531 PM EDT WED JUL 2 2014

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL BERKS COUNTY IN EASTERN PENNSYLVANIA...
  THIS INCLUDES THE CITY OF READING...

* UNTIL 930 PM EDT

* AT 528 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  TWO TO TWO AND A HALF INCHES HAS FALLEN ACROSS THE THE WARNED 
  AREA WITH ANOTHER INCH OR TWO POSSIBLE WHICH COULD CAUSE SOME 
  FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LEESPORT...
  WOMELSDORF...SHOEMAKERSVILLE...LAURELDALE...FLEETWOOD...BERNVILLE
  AND FAIRVIEW HGTS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 4036 7623 4055 7590 4041 7564 4022 7601
      4032 7617 4036 7621

$$

ROBERTSON

1 follow-up statement

164 
WGUS71 KPHI 022344
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
744 PM EDT WED JUL 2 2014

PAC011-022353-
/O.CAN.KPHI.FF.W.0017.000000T0000Z-140703T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
744 PM EDT WED JUL 2 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL BERKS
COUNTY...

THE HEAVY RAIN THAT PROMPTED THE WARNING HAS ENDED. THEREFORE THE 
FLASH FLOOD WARNING HAS BEEN CANCELLED. ADDITIONAL SHOWERS AND 
THUNDERSTORMS REMAIN POSSIBLE THROUGH THIS EVENING.

LAT...LON 4036 7623 4055 7590 4041 7564 4022 7601
      4032 7617 4036 7621

$$

ROBERTSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 1:10 PM EDT	Special Weather Statement	PHI	Monroe	65 min
Jul 2, 1:34 PM EDT	Severe Thunderstorm Warning	PHI	Monroe	56 min
Jul 2, 1:47 PM EDT	Severe Thunderstorm Warning	PHI	Berks	58 min
Jul 2, 2:45 PM EDT	Special Weather Statement	PHI	Berks	30 min
Jul 2, 2:49 PM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jul 2, 3:00 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Jul 2, 3:24 PM EDT	Special Weather Statement	PHI	Bucks	66 min
Jul 2, 3:25 PM EDT	Special Weather Statement	PHI	Carbon, Monroe	65 min
Jul 2, 3:36 PM EDT	Flash Flood Watch	PHI	Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more	46 hr
Jul 2, 3:58 PM EDT	Areal Flood Advisory	PHI	Monroe, Northampton	4 hr
Jul 2, 4:03 PM EDT	Severe Thunderstorm Warning	PHI	Lehigh, Monroe, Northampton	57 min
Jul 2, 4:56 PM EDT	Areal Flood Advisory	PHI	Berks	2 hr
Jul 2, 5:01 PM EDT	Severe Thunderstorm Warning	PHI	Berks	59 min
Jul 2, 5:23 PM EDT	Severe Thunderstorm Warning	PHI	Bucks	67 min
Jul 2, 5:42 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 2, 5:56 PM EDT	Special Weather Statement	PHI	Lehigh, Northampton	49 min
Jul 2, 6:13 PM EDT	Flash Flood Warning	PHI	Bucks	4 hr
Jul 2, 6:44 PM EDT	Flash Flood Warning	PHI	Berks	4 hr
Jul 2, 6:51 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Montgomery	4 hr
Jul 2, 7:00 PM EDT	Special Weather Statement	PHI	Bucks, Chester, Montgomery	60 min
Jul 2, 7:09 PM EDT	Areal Flood Advisory	PHI	Bucks	4 hr
Jul 2, 7:26 PM EDT	Special Weather Statement	PHI	Philadelphia	64 min
Jul 2, 7:32 PM EDT	Special Weather Statement	PHI	Delaware, Montgomery, Philadelphia	58 min
Jul 2, 7:35 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Philadelphia	55 min
Jul 2, 7:48 PM EDT	Severe Thunderstorm Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	27 min
Jul 2, 7:52 PM EDT	Areal Flood Advisory	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	4 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2014 Every flash flood warning in 2014

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.