Alert archive / New York / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 69, NWS New York, NY

August 18, 1998Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Aug 18, 1998, 5:32 PM EDT for Suffolk County, New York. It was in force for 63 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
Aug 18, 1998, 5:32 PM EDT (21:32 UTC)
Expired
Aug 18, 1998, 6:35 PM EDT
In force
63 min
Issued by
NWS New York, NY
Area
Whole counties

County Suffolk County, NY

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.5 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 12:00Z on 1998-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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 12:00Z on 1998-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
10 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
902 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
27 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.

217 
WUUS1 KNYC 182128 RRA
SVRNYC
ANZ330-335-350-355-NYC103-182235-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
532 PM EDT TUE AUG 18 1998

THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A

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

* UNTIL 635 PM EDT

* A CLUSTER OF HEAVY THUNDERSTORMS MOVING ACROSS THE AREA WILL
  CAUSE HEAVY DOWPOURS...GUSTY WINDS IN EXCESS OF 50 MPH AND
  POSSIBLE HAIL. THE CELLS ARE MOVING EAST/SOUTHEAST AROUND 20 MPH.

DAMAGING WINDS AND LARGE HAIL ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

PW

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Aug 18, 3:40 PM EDT, 1 hour 52 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
340 PM EDT TUE AUG 18 1998

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0300 PM    NEWTOWN                   CT   WIND DAMAGE
08/18/98   FAIRFIELD                      NUMEROUS TREES/WIRES DOWN

0317 PM    SEYMOUR                   CT   WIND DAMAGE
08/18/98   NEW HAVEN                      EST 60-70 MPH WINDS TREES
                                          DOWN

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.