Alert archive / Pennsylvania / Flash Flood Warnings in 2010

Flash Flood Warning 10, NWS Philadelphia/Mount Holly

July 14, 2010Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 14, 2010, 11:11 AM EDT for Berks County, Pennsylvania. It was in force for 3 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 14, 2010, 11:11 AM EDT (15:11 UTC)
Expired: Jul 14, 2010, 1:56 PM EDT
In force: 3 hr
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon
Flood severity: None

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 153 km from the middle of the area, began a volume at 15:14 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, 3.2 hours before the alert went out and 103 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: 181 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 495 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 92 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

882 
WGUS51 KPHI 141511
FFWPHI
PAC011-141915-
/O.NEW.KPHI.FF.W.0010.100714T1511Z-100714T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1111 AM EDT WED JUL 14 2010

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN BERKS COUNTY IN EASTERN PENNSYLVANIA...

* UNTIL 315 PM EDT

* AT 1102 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
AN AREA OF VERY HEAVY RAIN SLOWLY MOVING THROUGH THE WARNED AREA. UP 
TO TWO INCHES OF RAIN HAS ALREADY FALLEN AND AN ADDITIONAL TWO 
INCHES COULD FALL OVER THE NEXT COUPLE OF HOURS. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  SHOEMAKERSVILLE...LEESPORT AND BERNVILLE

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.

&&

LAT...LON 4056 7609 4050 7589 4026 7607 4026 7608
      4030 7614 4036 7621 4036 7623 4037 7625

$$

KRUZDLO

1 follow-up statement

996 
WGUS71 KPHI 141756
FFSPHI

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
156 PM EDT WED JUL 14 2010

PAC011-141804-
/O.CAN.KPHI.FF.W.0010.000000T0000Z-100714T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BERKS PA-
156 PM EDT WED JUL 14 2010

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

THERE WILL BE A FEW MORE SHOWERS IN BERKS COUNTY THIS AFTERNOON BUT 
THE HEAVIEST SHOWERS AND THUNDERSTORMS HAVE SHIFTED TO THE 
PHILADELPHIA WILMINGTON INTERSTATE 95 CORRIDOR. 

THERE ARE NO FURTHER REPORTS OF FLOODING TO RELAY IN THIS MESSAGE. 

LAT...LON 4056 7609 4050 7589 4026 7607 4026 7608
      4030 7614 4036 7621 4036 7623 4037 7625

$$


DRAG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 14, 1:29 AM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jul 14, 1:44 AM EDT	Special Weather Statement	PHI	Chester	61 min
Jul 14, 2:32 AM EDT	Flash Flood Warning	PHI	Chester	3 hr
Jul 14, 2:52 AM EDT	Flash Flood Warning	PHI	Delaware	3 hr
Jul 14, 3:27 AM EDT	Areal Flood Advisory	PHI	Carbon, Lehigh, Monroe, Northampton	3 hr
Jul 14, 3:46 AM EDT	Flash Flood Warning	PHI	Philadelphia	3 hr
Jul 14, 3:52 AM EDT	Special Weather Statement	PHI	Carbon	53 min
Jul 14, 3:58 AM EDT	Areal Flood Advisory	PHI	Bucks, Montgomery	3 hr
Jul 14, 3:59 AM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 14, 6:06 AM EDT	Areal Flood Advisory	PHI	Carbon, Monroe	4 hr
Jul 14, 10:04 AM EDT	Areal Flood Advisory	PHI	Berks	3 hr
Jul 14, 10:15 AM EDT	Flash Flood Watch	PHI	Berks, Delaware, Lehigh, Northampton, Philadelphia	9 hr
Jul 14, 12:52 PM EDT	Areal Flood Advisory	PHI	Chester, Delaware	3 hr
Jul 14, 1:35 PM EDT	Areal Flood Advisory	PHI	Bucks, Delaware, Montgomery, Philadelphia	115 min
Jul 14, 2:11 PM EDT	Flash Flood Warning	PHI	Delaware, Montgomery, Philadelphia	109 min
Jul 14, 2:36 PM EDT	Areal Flood Advisory	PHI	Bucks	3 hr
Jul 14, 3:12 PM EDT	Flash Flood Warning	PHI	Bucks	63 min
Jul 14, 4:03 PM EDT	Areal Flood Warning	PHI	Chester, Delaware, Montgomery, Philadelphia	79 min

Nearby

Flash Flood Warnings in Pennsylvania, 2010 Every flash flood warning in 2010

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.