Alert archive / New York / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 2, NWS New York, NY

May 1, 1997Nassau County, Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at May 1, 1997, 5:05 PM EDT for Nassau County, Suffolk County, New York. It was in force for 40 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 1, 1997, 5:05 PM EDT (21:05 UTC)
Expired: May 1, 1997, 5:45 PM EDT
In force: 40 min
Issued by: NWS New York, NY
Area: Whole counties

Counties Nassau County, NY, Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 23 km from the middle of the area, began a volume at 21:12 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 1, 5:15 PM EDT	Hail 1	Kings Park, 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 23 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: 1425 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 192 m²/s²
0-3 km storm-relative helicity: 174 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 012105 RRA
SVRNYC
NYC059-103-012145-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
505 PM EDT THU MAY 1 1997
 
THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  545 PM EDT
FOR THE PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST NEW YORK
 
   ...EASTERN NASSAU COUNTY...WESTERN SUFFOLK COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
 
A SEVERE THUNDERSTORM NEAR WESTBURY LONG ISLAND IS MOVING NORTHEAST AT
45 MPH. THIS STORM MAY PRODUCE DAMAGING WINDS AND LARGE HAIL AS IT
MOVES ACROSS THE REMAINDER OF EASTERN NASSAU COUNTY AND INTO WESTERN
SUFFOLK DURING THE NEXT HOUR. THIS STORM SHOULD EXIT INTO LONG ISLAND
SOUND NEAR NORTHPORT.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 58
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.:  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 5:59 PM EDT	Severe Thunderstorm Warning	OKX	Orange	46 min
May 1, 7:34 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Suffolk	56 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.