Alert archive / New York / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 70, NWS New York, NY

July 18, 1997Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 18, 1997, 3:12 PM EDT for Suffolk County, New York. It was in force for 33 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
Jul 18, 1997, 3:12 PM EDT (19:12 UTC)
Expired
Jul 18, 1997, 3:45 PM EDT
In force
33 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 19:11 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, 7.2 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 1997-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 537 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 1997-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.193958Sfc1 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
537 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
1397 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
44 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 181917 RRA
SVRNYC
NYC103-181945-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
312 PM EDT FRI JUL 18 1997
 
THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  345 PM EDT
FOR THE PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST NEW YORK
 
   ...SOUTHERN SUFFOLK COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
 
DOPPLER RADAR AT 315 PM SHOWED A LINE OF STRONG THUNDERSTORMS EXTENDING
FROM BABYLON TO NEAR SHIRLEY AND WILL AFFECT SOUTHERN SUFFOLK COUNTY
FROM THIS LINE SOUTH TO THE OCEAN FRONT BEFORE MOVING OFFSHORE BY 345
PM.
 
THESE STORMS CAN PRODUCE WIND GUSTS TO 60 MPH ALONG WITH CLOUD TO GROUND
LIGHTNING...HEAVY DOWNPOURS AND HAIL.
 
 
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.
 
 
 
&
 
TRM

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 2:16 PM EDTSevere Thunderstorm WarningOKXNassau, Queens59 min
Jul 18, 2:16 PM EDTSevere Thunderstorm WarningOKXSuffolk59 min
Jul 18, 7:34 PM EDTSevere Thunderstorm WarningOKXRichmond41 min
Jul 18, 7:43 PM EDTSevere Thunderstorm WarningOKXNew York47 min
Jul 18, 7:43 PM EDTSevere Thunderstorm WarningOKXKings, Queens47 min
Jul 18, 7:57 PM EDTSevere Thunderstorm WarningOKXRichmond33 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.