Alert archive / Pennsylvania / Flash Flood Warnings in 1996

Flash Flood Warning 8, NWS Philadelphia/Mount Holly

January 27, 1996Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Jan 27, 1996, 5:35 PM EST for Bucks County, Pennsylvania. It was in force for 10 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
Jan 27, 1996, 5:35 PM EST (22:35 UTC)
Expired
Jan 28, 1996, 4:00 AM EST
In force
10 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 22:34 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 12:00Z, 10.6 hours before the alert went out and 198 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 12:00Z on 1996-01-27Temperature 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 12:00Z on 1996-01-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 635 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
635 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
635 m²/s²
0-3 km storm-relative helicity
806 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 272237
FFWPHL
PAC017-280900-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
535 PM EST SAT JAN 27 1996
 
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY...NEW JERSEY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 400 AM EST FOR PEOPLE IN THE
FOLLOWING LOCATION...
 
IN  PENNSYLVANIA
 
   ...BUCKS COUNTY
 
AT 530 PM...THE NESHAMINY CREEK AT LANGHORNE HAD RISEN TO A LEVEL OF
9.4 FEET.  THE FLOOD STAGE AT LANGHORNE IS 9.0 FT.  THE CREEK IS
FORECAST TO CONTINUE TO RISE THIS EVENING...AND IT SHOULD CREST
BETWEEN 11.0 AND 12.0 FEET AROUND MIDNIGHT.  THE CREEK SHOULD RETURN
TO ITS BANKS BY DAYBREAK ON SUNDAY.
 
IF YOU ARE IN AN AREA WHICH IS PRONE TO FLOODING...MOVE TO HIGHER
GROUND...BEFORE YOUR ACCESS IS CUT OFF BY RISING FLOOD WATERS.
CONTINUE TO MONITOR NOAA WEATHER RADIO...AND YOUR LOCAL RADIO AND
TELEVISION STATIONS...FOR THE LATEST INFORMATION ON THE FLOOD WARNING.
 
IOVINO
 
 
x 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 27, 5:42 PM ESTFlash Flood WarningPHIDelaware5 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.