Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 100, NWS Philadelphia/Mount Holly

October 19, 1996Berks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Oct 19, 1996, 1:30 PM 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 counties it named.

The facts

Issued
Oct 19, 1996, 1:30 PM EDT (17:30 UTC)
Expired
Oct 19, 1996, 4:00 PM EDT
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Berks County, PA

The radar

The Philadelphia radar (KDIX), 139 km from the middle of the area, began a volume at 17:31 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

Washington/Dulle, VA (KIAD), launched 12:00Z, 5.5 hours before the alert went out and 206 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, Washington/Dulle, VA at 12:00Z on 1996-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Washington/Dulle, VA at 12:00Z on 1996-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -127 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
-127 m²/s²
0-3 km storm-relative helicity
69 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 
TTAA00 KPHL 191735
FFWPHL
PAC011-192000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
130 PM EDT SAT OCT 19 1996

THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS
EXTENDED THE FLASH FLOOD WARNING UNTIL 400 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN  PENNSYLVANIA

   ...BERKS COUNTY

REPORTS OF SMALL STREAMS OVERFLOWING THEIR BANKS...ROADS CLOSED AND
SOME EVACUATIONS  HAVE BEEN REPORTED.  RAINFALL AMOUNTS IN EXCESS OF
THREE INCHES HAVE FALLEN OVER THE COUNTY SINCE FRIDAY EVENING.
FLOODING ALONG THE LARGER RIVERS IS EXPECTED  LATER THIS AFTERNOON.



WN

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 19, 8:07 AM EDTFlash Flood WarningPHIBerks118 min
Oct 19, 8:19 AM EDTFlash Flood WarningPHIDelaware3 hr
Oct 19, 9:45 AM EDTFlash Flood WarningPHIBerks4 hr
Oct 19, 10:10 AM EDTFlash Flood WarningPHIDelaware6 hr
Oct 19, 11:08 AM EDTFlash Flood WarningPHIBucks6 hr
Oct 19, 2:18 PM EDTFlash Flood WarningPHILehigh6 hr
Oct 19, 4:36 PM EDTFlash Flood WarningPHIMonroe4 hr
Oct 19, 5:55 PM EDTFlash Flood WarningPHIMonroe, Northampton5 hr
Oct 19, 5:55 PM EDTFlash Flood WarningPHICarbon5 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1996Every flash flood warning in 1996

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.