Alert archive / New York / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 35, NWS New York, NY

November 20, 1989Nassau County, Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Nov 20, 1989, 9:00 PM EST for Nassau County, Suffolk County, New York. It was in force for 60 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Nov 20, 1989, 9:00 PM EST (02:00 UTC)
Expired
Nov 20, 1989, 10:00 PM EST
In force
60 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.

What was reported inside it

TimeReportWhereRemark
Nov 20, 9:45 PM ESTThunderstorm Wind 0Nassau, NY
Nov 20, 9:55 PM ESTThunderstorm Wind 50Suffolk, NY

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 00:00Z, 2.0 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 00:00Z on 1989-11-21Temperature 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, Atlantic City In, NJ at 00:00Z on 1989-11-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 square meters per square second.1939587897117Sfc1 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
1712 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
197 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 20, 8:37 PM ESTSevere Thunderstorm WarningOKXHunterdon, Middlesex, Somerset83 min
Nov 20, 9:00 PM ESTSevere Thunderstorm WarningOKXMonmouth60 min
Nov 20, 9:00 PM ESTSevere Thunderstorm WarningOKXBergen, Passaic60 min
Nov 20, 9:00 PM ESTSevere Thunderstorm WarningOKXEssex, Morris, Union60 min
Nov 20, 9:00 PM ESTSevere Thunderstorm WarningOKXSussex, Warren60 min
Nov 20, 9:00 PM ESTSevere Thunderstorm WarningOKXHudson60 min
Nov 20, 9:00 PM ESTSevere Thunderstorm WarningOKXKings, Queens60 min
Nov 20, 10:00 PM ESTSevere Thunderstorm WarningOKXSuffolk60 min
Nov 20, 9:25 PM ESTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region65 min
Nov 20, 10:11 PM ESTSevere Thunderstorm WarningOKXLower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region64 min

Nearby

Severe Thunderstorm Warnings in New York, 1989Every severe thunderstorm warning in 1989

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.