Alert archive / New York / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 41, NWS New York, NY

June 20, 1998Richmond County, New York

NWS New York, NY issued this severe thunderstorm warning at Jun 20, 1998, 4:41 PM EDT for Richmond County, New York. It was in force for 34 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
Jun 20, 1998, 4:41 PM EDT (20:41 UTC)
Expired
Jun 20, 1998, 5:15 PM EDT
In force
34 min
Issued by
NWS New York, NY
Area
Whole counties

County Richmond County, NY

The radar

The Philadelphia radar (KDIX), 74 km from the middle of the area, began a volume at 20:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.7 hours before the alert went out and 113 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 1998-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 369 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 1998-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.19395878Sfc1 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
369 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
1296 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
17 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.

742 
WUUS1 KNYC 202043 RRA
SVRNYC
ANZ355-NJC039-NYC085-202115-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
441 PM EDT SAT JUN 20 1998

THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RICHMOND COUNTY INCLUDING ADJACENT COASTAL WATERS IN SOUTHEASTERN
  NEW YORK
  EASTERN UNION COUNTY IN NORTHEASTERN NEW JERSEY

* UNTIL 515 PM EDT

* THE FOLLOWING LOCATIONS ARE IN THE PATH OF THIS STORM
  SOUTH BEACH           BY 439 PM EDT
  STAPLETON             BY 439 PM EDT
  RICHMOND VALLEY       BY 442 PM EDT
  OAKWOOD HEIGHTS       BY 443 PM EDT
  GREAT KILLS           BY 443 PM EDT

* AT 438 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR IN UPTON
  NY INDICATED A SEVERE THUNDERSTORM IN THE VICINITY OF STATEN
  ISLAND MOVING SOUTHEAST AT 10 MPH.

LARGE HAIL AND HEAVY RAIN ARE LIKELY. GO INSIDE A STURDY
BUILDING AND STAY AWAY FROM WINDOWS

TRM


&

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; radar from the NEXRAD Level II archive.