Alert archive / Delaware / Flash Flood Warnings in 2002

Flash Flood Warning 48, NWS Philadelphia/Mount Holly

June 19, 2002New Castle County, Delaware; Chester County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jun 19, 2002, 6:51 PM EDT for New Castle County, Delaware; Chester County, Pennsylvania. It was in force for 114 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 19, 2002, 6:51 PM EDT (22:51 UTC)
Expired
Jun 19, 2002, 8:45 PM EDT
In force
114 min
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties New Castle County, DE, Chester County, PA

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.9 hours before the alert went out and 49 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-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2002-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 145 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2002-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
145 J/kg
Mixed-layer CIN
-161 J/kg
Mixed-layer LCL
1010 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
112 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KPHI 192251
FFWPHI
DEC003-PAC029-200045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
651 PM EDT WED JUN 19 2002

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE
  SOUTH CENTRAL CHESTER COUNTY IN SOUTHEAST PENNSYLVANIA

* UNTIL 845 PM EDT.

* AT 647 PM EDT...WEATHER SERVICE RADAR INDICATED THUNDERSTORMS 
PRODUCING HEAVY RAINS IN EXCESS OF 3 INCHES IN AN HOURS TIME.

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

FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.

$$

LAT...LON 3986 7586 3976 7572 3980 7553 3990 7568

RNS

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 19, 1:51 AM EDTFlash Flood WarningPHIBerks2 hr
Jun 19, 2:06 AM EDTFlash Flood WarningPHILehigh3 hr
Jun 19, 2:42 AM EDTFlash Flood WarningPHIBucks2 hr
Jun 19, 3:47 AM EDTFlash Flood WarningPHIBerks3 hr
Jun 19, 2:14 PM EDTFlash Flood WarningPHICarbon, Monroe2 hr

Nearby

Flash Flood Warnings in Delaware, 2002Flash Flood Warnings in Pennsylvania, 2002Every flash flood warning in 2002

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.