Alert archive / New York / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 16, NWS New York, NY

May 6, 1997Nassau County, New York

NWS New York, NY issued this severe thunderstorm warning at May 6, 1997, 1:38 PM EDT for Nassau County, New York. It was in force for 67 min. 1 report 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: May 6, 1997, 1:38 PM EDT (17:38 UTC)
Expired: May 6, 1997, 2:45 PM EDT
In force: 67 min
Issued by: NWS New York, NY
Area: Whole counties

County Nassau County, NY

The radar

The Brookhaven radar (KOKX), 62 km from the middle of the area, began a volume at 17:41 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.

What was reported inside it

Time	Report	Where	Remark
May 6, 2:15 PM EDT	Thunderstorm Wind 50	East Meadow, 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 6, 11:45 AM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.6 hours before the alert went out and 62 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1042 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 198 m²/s²
0-3 km storm-relative helicity: 203 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 061739 RRA
SVRNYC
CTC001-NYC059-061845-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
138 PM EDT TUE MAY 6 1997
 
THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  245 PM EDT
FOR THE PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHWEST CONNECTICUT
 
   ...FAIRFIELD COUNTY
 
 
AND THE ADJACENT COASTAL WATERS
 
 
IN SOUTHEAST NEW YORK
 
   ...NASSAU COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
AT 135 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF SEVERE THUNDERSTORMS MOVING INTO PUTNAM AND WESTCHESTER COUNTIES IN
NEW YORK AND BERGEN COUNTY IN NEW JERSEY. THESE THUNDERSTORMS HAVE A
HISTORY OF PRODUCING TREE AND POWER LINE DAMAGE IN NORTHEAST NEW JERSEY.
 
MOVEMENT WAS EAST AT 45 MPH.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 58 MPH...LARGE HAIL...AND
DEADLY LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
 
HAYES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 11:46 AM EDT	Severe Thunderstorm Warning	OKX	Orange	59 min
May 6, 12:42 PM EDT	Severe Thunderstorm Warning	OKX	Orange	63 min
May 6, 1:19 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Putnam, Rockland, Westchester	56 min
May 6, 1:19 PM EDT	Severe Thunderstorm Warning	OKX	Richmond	56 min
May 6, 1:19 PM EDT	Severe Thunderstorm Warning	OKX	New York	56 min
May 6, 1:19 PM EDT	Severe Thunderstorm Warning	OKX	Kings, Queens	56 min
May 6, 2:03 PM EDT	Severe Thunderstorm Warning	OKX	Suffolk	57 min
May 6, 2:17 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, New York	28 min
May 6, 2:17 PM EDT	Severe Thunderstorm Warning	OKX	Kings, Queens	28 min

Nearby

Severe Thunderstorm Warnings in New York, 1997 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.