Alert archive / New York / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 89, NWS New York, NY

August 5, 1997Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Aug 5, 1997, 6:31 PM EDT for Suffolk County, New York. It was in force for 44 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 5, 1997, 6:31 PM EDT (22:31 UTC)
Expired
Aug 5, 1997, 7:15 PM EDT
In force
44 min
Issued by
NWS New York, NY
Area
Whole counties

County Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 17 km from the middle of the area, began a volume at 22:30 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, 10.5 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 1997-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 107 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 1997-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 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
107 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
474 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
30 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 052236 RRA
SVRNYC
NYC103-052315-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
631 PM EDT TUE AUG 5 1997
 
THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM EDT
FOR THE PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST NEW YORK
 
   ...SUFFOLK COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
SEVERE THUNDERSTORMS ARE MOVING INTO WEATHER SUFFOLK COUNTY AS OF 6:30
PM. THESE STORMS HAVE A HISTORY OF LARGE HAIL AND DEADLY LIGHTNING.
 
EXPECT THESE SEVERE THUNDERSTORMS IN THE EAST FARMINGDALE AREA BY 6:45
PM ALONG ROUTE 11O SOUTH OF THE LIE.
 
THIS IS PART OF A DEVELOPING LINE OF THUNDERSTORMS THAT FROM YAPHANK
WEST TO CORAM...WEST BACK INTO NASSAU COUNTY.
 
 
 
WHEN THUNDERSTORMS ARE OCCURRING...PEOPLE SHOULD MOVE INSIDE A
STRONG BUILDING.  DO NOT STAND BY WINDOWS.  DON'T USE TELEPHONES
OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY UNTIL ^THE STORM
HAS PASSED.  MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 5, 3:04 PM EDTSevere Thunderstorm WarningOKXOrange56 min
Aug 5, 5:55 PM EDTSevere Thunderstorm WarningOKXNassau, Queens65 min
Aug 5, 6:55 PM EDTSevere Thunderstorm WarningOKXNassau35 min

Nearby

Severe Thunderstorm Warnings in New York, 1997Every severe thunderstorm warning in 1997

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.