Alert archive / Pennsylvania / Flash Flood Warnings in 1995

Flash Flood Warning 5, NWS Philadelphia/Mount Holly

March 9, 1995Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this flash flood warning at Mar 9, 1995, 3:51 AM EST for Bucks County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Mar 9, 1995, 3:51 AM EST (08:51 UTC)
Expired
Mar 9, 1995, 7:00 AM EST
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

County Bucks County, PA

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 8.9 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 00:00Z on 1995-03-09Temperature 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 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 1995-03-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 438 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
483 m above ground
0-6 km bulk shear
66 kt
0-1 km storm-relative helicity
438 m²/s²
0-3 km storm-relative helicity
416 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 090850
FFWPHL
PAC017-091200-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHILADELPHIA/MOUNT HOLLY NJ
351 AM EST THU MAR 9 1995
 
THE NATIONAL WEATHER SERVICE IN PHILADELPHIA/MOUNT HOLLY HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  700 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN  PENNSYLVANIA
 
   ...BUCKS COUNTY
 
AT 345 THIS MORNING...THE RIVER GAGE FOR THE NESHAMINY CREEK AT
LANGHORNE WAS AT 9.0 FEET. FLOOD STAGE FOR THE NESHAMINY AT
LANGHORNE IS 9.0 FEET.  THE NESHIMINY WILL CREST BETWEEN 9.0 AND
9.2 FEET EARLY THIS MORNING.
 
IF YOU ARE IN THE WARNED COUNTY IN AN AREA SUBJECT TO FLOODING
MOVE TO HIGHER GROUND.  DO NOT DRIVE THROUGH FLOOD WATERS.
CLIMBING ATOP YOUR STALLED VEHICLE WILL NOT PREVENT YOU FROM
BEING SWEPT INTO DANGEROUS STREAM CONDITIONS AS WATER LEVELS RISE.
 
JWH
&

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 8, 7:15 PM ESTFlash Flood WarningPHIBerks, Chester, Montgomery5 hr
Mar 8, 7:54 PM ESTFlash Flood WarningPHIDelaware3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1995Every flash flood warning in 1995

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.