Alert archive / New Jersey / Flash Flood Warnings in 1999

Flash Flood Warning 19, NWS Philadelphia/Mount Holly

March 22, 1999Hunterdon County, Mercer County, Somerset County, New Jersey

NWS Philadelphia/Mount Holly issued this flash flood warning at Mar 22, 1999, 1:57 AM EST for Hunterdon County, Mercer County, Somerset County, New Jersey. 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
Mar 22, 1999, 1:57 AM EST (06:57 UTC)
Expired
Mar 22, 1999, 5:00 AM EST
In force
3 hr
Issued by
NWS Philadelphia/Mount Holly
Area
Whole counties

Counties Hunterdon County, NJ, Mercer County, NJ, Somerset County, NJ

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 7.0 hours before the alert went out and 258 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, Albany, NY at 00:00Z on 1999-03-22Temperature 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, Albany, NY at 00:00Z on 1999-03-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 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
1662 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
478 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 220658
FFWPHL
NJC019-021-035-221000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
157 AM EST MON MAR 22 1999

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HUNTERDON COUNTY IN NEW JERSEY.
  SOMERSET COUNTY IN NEW JERSEY.
  MERCER COUNTY IN NEW JERSEY.

* UNTIL 500 AM EST.

* AT 155 AM...RAINFALL OF 1 TO 2 INCHES OF RAIN HAS FALLEN. BEFORE
  THE RAIN ENDS...ANOTHER 1/4 TO 1/2 INCH OF RAIN CAN BE EXPECTED.

* THE HEAVY RAIN WILL CAUSE FLOODING OF POOR DRAINAGE AREAS AND
  SOME SMALL STREAMS. SOME ROADWAY FLOODING HAS ALREADY BEEN
  REPORTED.

  DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
  ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
  CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED
  QUICKLY. MOVE TO HIGHER GROUND.

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

  .END
  RNS

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 22, 1:32 AM ESTFlash Flood WarningPHIMorris, Sussex, Warren4 hr

Nearby

Flash Flood Warnings in New Jersey, 1999Every flash flood warning in 1999

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.