Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 134, NWS Philadelphia/Mount Holly

December 13, 1996Monroe County, Northampton County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Dec 13, 1996, 10:30 PM EST for Monroe County, Northampton County, Pennsylvania. It was in force for 6 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
Dec 13, 1996, 10:30 PM EST (03:30 UTC)
Expired
Dec 14, 1996, 4:00 AM EST
In force
6 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Monroe County, PA, Northampton County, PA

The radar

The Philadelphia radar (KDIX), 132 km from the middle of the area, began a volume at 03:32 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

Brookhaven, NY (KOKX), launched 00:00Z, 3.5 hours before the alert went out and 207 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, Brookhaven, NY at 00:00Z on 1996-12-14Temperature 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, Brookhaven, NY at 00:00Z on 1996-12-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.193958Sfc1 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
554 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
192 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 140330
FFWPHL
PAC011-077-089-095-140925-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
1030 PM EST FRI DEC 13 1996

THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY NJ HAS
ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 4 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN  PENNSYLVANIA

   ...EASTERN MONROE COUNTY
   ...EASTERN BERKS COUNTY
   ...LEHIGH COUNTY
   ...NORTHAMPTON COUNTY
 
HEAVY RAINS CONTINUE IN THE FLASH FLOOD AREAS. SO FAR...RAINFALL
AMOUNTS OF 1 TO 2 INCHES HAVE BEEN COMMON WITH LOCAL AMOUNTS NEAR
3 INCHES. RAIN...HEAVY AT TIMES WILL CONTINUE WELL PAST MIDNIGHT.

 AVOID AREAS WHICH ARE PRONE TO FLOODING. BE ESPECIALLY CAUTIOUS AT
NIGHT WHEN IT IS MORE DIFFICULT TO RECOGNIZE FLOOD DANGERS. IF YOU
GET CAUGHT BY FLOOD WATERS...LEAVE YOUR CAR AND GET TO HIGHER GROUND
QUICKLY. YOUR LIFE MAY DEPEND ON IT.

STAY TUNED TO NOAA WEATHER RADIO...THE VOICE OF THE NAT0INAL WEATHER
SERVICE...OR TO COMMERCIAL RADIO OR TELEVISION STATIONS FOR THE
LATEST INFORMATION.

NC/JM

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 13, 10:30 PM ESTFlash Flood WarningPHIBerks, Lehigh6 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.