Alert archive / New York / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 1, NWS New York, NY

May 31, 1986Nassau County, Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at May 31, 1986, 4:15 PM EDT for Nassau County, Suffolk County, New York. It was in force for 105 min.

The area

The counties it named.

The facts

Issued
May 31, 1986, 4:15 PM EDT (20:15 UTC)
Expired
May 31, 1986, 6:00 PM EDT
In force
105 min
Issued by
NWS New York, NY
Area
Whole counties

Counties Nassau County, NY, Suffolk County, NY

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 8.3 hours before the alert went out and 193 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, Atlantic City In, NJ at 12:00Z on 1986-05-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1027 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, Atlantic City In, NJ at 12:00Z on 1986-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 23 square meters per square second.1939Sfc1 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
1027 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
1356 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
23 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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

Special weather statement, May 31, 3:23 PM EDT, 52 minutes before
SPECIAL WEATHER STATEMENT FOR EXTREME SOUTHEASTERN NEW YORK
NORTHERN NEW JERSEY..AND LONG ISLAND
NATIONAL WEATHER SERVICE NEW YORK NY
330 PM EST FRI MAY 30 1986

   ...THUNDERSTORM ACTIVITY DEVELOPING...

AT 3 PM EDT THE RADAR IN NEW YORK CITY DETECTED THUNDERSTORMS IN MORRIS
COUNTY NEW JERSEY. THEY WERE MOVING EASTWARD TOWARD PASSIC AND SUSSEX
COUNTIES. SHORTLY THEREAFTER OTHER THUNDERSTORMS WERE DETECTED AROUND
THE AREA. THESE THUNDERSTORMS ARE ACOMPANIED BY HEAVY RAIN.
THE THUNDERSTORM ACTIVITY WILL REMAIN WITH US FOR THE NEXT FEW HOURS.

   PERSONS PLANNING OUTDOOR ACTIVITIES SHOULD BE ALERT FOR RAPIDLY
CHANGING WEATHER CONDITIONS.

ES

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 5:45 PM EDTSevere Thunderstorm WarningOKXNassau75 min
May 31, 4:15 PM EDTSevere Thunderstorm WarningOKXBergen105 min

Nearby

Severe Thunderstorm Warnings in New York, 1986Every severe thunderstorm warning in 1986

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.