Alert archive / New York / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 4, NWS New York, NY

May 6, 1998Nassau County, New York

NWS New York, NY issued this severe thunderstorm warning at May 6, 1998, 7:35 PM EDT for Nassau County, New York. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 6, 1998, 7:35 PM EDT (23:35 UTC)
Expired
May 6, 1998, 8:35 PM EDT
In force
60 min
Issued by
NWS New York, NY
Area
Whole counties

County Nassau County, NY

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 11.6 hours before the alert went out and 62 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 1998-05-06Temperature 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 1998-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
754 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
7 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 KNYC 062335 RRA
SVRNYC
ANZ350-NYC059-070035-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
735 PM EDT WED MAY 6 1998

THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NASSAU COUNTY INCLUDING ADJACENT COASTAL WATERS IN SOUTHEASTERN
  NEW YORK

* UNTIL 835 PM EDT

* THE FOLLOWING LOCATIONS ARE IN THE PATH OF THIS STORM
  OCEANSIDE...   MERRICK...   FREEPORT...   BALDWIN...   VALLEY
  STREAM...   MASSAPEQUA...   EAST MEADOW...   HEMPSTEAD AND
  GARDEN CITY.

* AT 732 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR IN UPTON
  NY INDICATED A SEVERE THUNDERSTORM 7 MILES SOUTH OF MERRICK
  MOVING NORTH AT 15 MPH. HAIL 3/4 INCH IN DIAMETER IS LIKELY
  WITH THIS STORM.

THIS IS A DANGEROUS STORM! STAY INDOORS AWAY FROM WINDOWS.

PW

The office that day

Everything else NWS New York, NY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 6, 5:04 PM EDTSevere Thunderstorm WarningOKXOrange61 min

Nearby

Severe Thunderstorm Warnings in New York, 1998Every severe thunderstorm warning in 1998

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.