Alert archive / New York / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 5, NWS New York, NY

May 6, 1998Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at May 6, 1998, 9:05 PM EDT for Suffolk County, New York. It was in force for 45 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, 9:05 PM EDT (01:05 UTC)
Expired
May 6, 1998, 9:50 PM EDT
In force
45 min
Issued by
NWS New York, NY
Area
Whole counties

County Suffolk County, NY

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 1.1 hours before the alert went out and 17 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 1998-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 433 joules per kilogram.LCLLFCEL10008507005003002001001 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 1998-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
433 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
536 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
90 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 070105 RRA
SVRNYC
ANZ330-335-350-355-NYC103-070150-

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

THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN AND CENTRAL SUFFOLK COUNTY INCLUDING ADJACENT COASTAL
  WATERS IN SOUTHEASTERN NEW YORK

* UNTIL 950 PM EDT

* THE FOLLOWING LOCATIONS ARE IN THE PATH OF THIS STORM
  HAUPPAUGE...   LAKE RONKONKOMA...   CENTEREACH...   SMITHTOWN...
  STONY BROOK...   PORT JEFFERSON...   MOUNT SINAI AND
  EATONS NECK.

* AT 900 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR IN UPTON
  NY INDICATED A SEVERE THUNDERSTORM IN THE VICINITY OF BOHEMIA
  MOVING NORTH AT 30 MPH. THIS STORM HAS HAD A HISTORY OF PRODUCING
  ONE-HALF TO THREE QUARTER INCH HAIL. HEAVY RAIN OF ONE INCH AN
  HOUR IS LIKELY AND STREET FLOODING WILL OCURR.

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

MET

The office that day

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

IssuedProductOfficeCountiesLasted
May 6, 11:37 PM EDTSevere Thunderstorm WarningOKXSuffolk48 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.