Alert archive / Pennsylvania / Flash Flood Warnings in 2004

Flash Flood Warning 17, NWS Philadelphia/Mount Holly

July 12, 2004Carbon County, Monroe County, Pennsylvania; Kent County, New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this flash flood warning at Jul 12, 2004, 4:33 PM EDT for Carbon County, Monroe County, Pennsylvania; Kent County, New Castle County, Delaware. It was in force for 78 days. 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 12, 2004, 4:33 PM EDT (20:33 UTC)
Expired: Sep 28, 2004, 9:00 PM EDT
In force: 78 days
Issued by: NWS Philadelphia/Mount Holly
Area: Counties, with a storm outline in the text

Counties Kent County, DE, New Castle County, DE, Carbon County, PA, Monroe County, PA

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.6 hours before the alert went out and 47 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: 76 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 122035
FFWPHI
DEC001-003-122330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
433 PM EDT MON JUL 12 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN KENT COUNTY IN CENTRAL DELAWARE
  THIS INCLUDES THE CITY OF DOVER
  NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITY OF NEWARK

* UNTIL 730 PM EDT

* AT 428 PM EDT...FLASH FLOODING WAS REPORTED IN BOTH NEW CASTLE AND
  KENT COUNTIES IN DELAWARE. OVER 5 INCHES OF RAIN HAS FALLEN IN     
  SOME AREAS OF BOTH THESE COUNTIES DURING THE PAST 12 HOURS, AND
  MORE RAIN IS ON THE WAY.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL IS CAUSING FLOODING OF SMALL 
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND 
UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.
DO NOT DRIVE THROUGH FLOODED ROADWAYS. THE WATER MAY BE DEEPER THAN
YOU THINK.


LAT...LON 3967 7576 3967 7555 3962 7561 3959 7560
      3960 7556 3947 7560 3943 7554 3935 7549
      3931 7544 3925 7539 3916 7542 3910 7539
      3903 7571

$$

JJM

1 follow-up statement

000 
WGUS51 KPHI 282059
FFWPHI
PAC025-089-290100-
/X.NEW.KPHI.FF.W.0017.040928T2055Z-040929T0100Z/
/0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
455 PM EDT TUE SEP 28 2004

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CARBON COUNTY IN NORTHEAST PENNSYLVANIA
  MONROE COUNTY IN NORTHEAST PENNSYLVANIA

* UNTIL 900 PM EDT

* AT 450 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  CONTINUING RAIN IN BOTH CARBON AND MONROE COUNTIES. MORE RAIN IS   
  ON THE WAY. FLOODING OF SMALL STREAMS AND URBAN AND POOR DRAINAGE  
  AREAS CAN BE EXPECTED THROUGH THE EVENING HOURS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO POCONO
  PINES...MOUNTAINHOME AND MOUNT POCONO.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

LAT...LON 4080 7580 4090 7532 4104 7510 4121 7519
      4121 7540 4113 7570 4102 7573 4089 7591

$$

JJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 7:26 AM EDT	Flash Flood Warning	PHI	Berks, Carbon, Lehigh, Monroe, Northampton	68 days
Jul 12, 7:50 AM EDT	Flash Flood Warning	PHI	Chester	68 days
Jul 12, 8:28 AM EDT	Flash Flood Warning	PHI	Montgomery	78 days
Jul 12, 9:31 AM EDT	Flash Flood Warning	PHI	Berks, Chester, Delaware	78 days
Jul 12, 12:10 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	78 days
Jul 12, 4:49 PM EDT	Flash Flood Warning	PHI	Philadelphia	78 days
Jul 12, 4:50 PM EDT	Special Marine Warning	PHI		70 min
Jul 12, 6:51 PM EDT	Flash Flood Warning	PHI	Chester, Delaware	78 days
Jul 12, 7:32 PM EDT	Flash Flood Warning	PHI	Berks, Bucks, Lehigh, Montgomery, Northampton	78 days
Jul 12, 1:53 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	37 min
Jul 12, 2:22 PM EDT	Tornado Warning	PHI	New Castle	38 min
Jul 12, 3:05 PM EDT	Severe Thunderstorm Warning	PHI	New Castle	55 min
Jul 12, 3:51 PM EDT	Severe Thunderstorm Warning	PHI	Kent	54 min
Jul 12, 4:08 PM EDT	Tornado Warning	PHI	Kent	37 min
Jul 12, 5:09 PM EDT	Severe Thunderstorm Warning	PHI	Kent	36 min
Jul 12, 5:45 PM EDT	Flash Flood Warning	PHI	Kent, New Castle, Sussex	78 days

Nearby

Flash Flood Warnings in Pennsylvania, 2004 Flash Flood Warnings in Delaware, 2004 Every flash flood warning in 2004

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.