Alert archive / New York / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 81, NWS New York, NY

July 18, 1997Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 18, 1997, 9:22 PM EDT for Suffolk County, New York. It was in force for 68 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
Jul 18, 1997, 9:22 PM EDT (01:22 UTC)
Expired
Jul 18, 1997, 10:30 PM EDT
In force
68 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 01:21 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

TimeReportWhereRemark
Jul 18, 9:45 PM EDTThunderstorm Wind 50Nws Upton, 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 00:00Z, 1.4 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 00:00Z on 1997-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 843 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 00:00Z on 1997-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 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
843 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1678 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KNYC 190127 RRA
SVRNYC
NYC103-190230-
 
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
922 PM EDT FRI JUL 18 1997
 
THE NATIONAL WEATHER SERVICE IN NEW YORK HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1030 PM EDT
FOR THE PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST NEW YORK
 
   ...EASTERN SUFFOLK COUNTY
 
AND THE ADJACENT COASTAL WATERS
 
 
AT 9:18 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM OVER WESTERN AND CENTRAL PORTIONS OF SUFFOLK
COUNTY LONG ISLAND. THERE HAVE BEEN REPORTS OF WIND GUSTS OF UP TO 60 MPIN BROOKHAVEN IN SUFFOLK COUNTY. THESE STORMS ARE MOVING EAST AT ABOUT
30 MPH.
 
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...
AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS.
STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Jul 18, 4:24 PM EDT, 4 hours 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
428 PM EDT FRI JUL 18 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0230 PM    SEA CLIFF                 NY   WIND DAMAGE
07/18/97   NASSAU                         EXTENSIVE DAMAGE REPORTED
                                          BY NASSAU COUNTY EOC IN
                                          SEA CLIFF...SANDS POINT..
                                          AND ELMONT.

0230 PM    PARAMUS                   NJ
07/18/97   BERGEN                         *** 1 DEAD ***
                                          TREE FELL KILLING PARKING
                                          LOT ATTENDANT AT PARAMUS
                                          COUNTRY CLUB. INITIAL
                                          REPORT.

0235 PM    BABYLON                   NY   60 MPH TSTM GUST
07/18/97   SUFFOLK                        ESTIMATED IN NORTH BABYLON

0245 PM    FARMINGDALE RPBLC ARPT    NY   60 MPH TSTM GUST
07/18/97   SUFFOLK                        SQUALL AT REPUBLIC AIRPORT

0250 PM    BABYLON                   NY   1 INCH HAIL
07/18/97   SUFFOLK

0250 PM    DEER PARK                 NY   WIND DAMAGE
07/18/97   SUFFOLK                        *** 12 INJ ***
                                          ROOFS BLOWN OFF TWO
                                          BUILDINGS...INITIAL
                                          ESTIMATE OF INJURIES TO
                                          PEOPLE INSIDE BUILDINGS.

0252 PM    DEER PARK H                NY   .75 INCH HAIL
07/18/97   SUFFOLK

0308 PM    BOHEMIA                   NY   58 MPH TSTM GUST
07/18/97   SUFFOLK
Local storm report, Jul 18, 4:28 PM EDT, 4 hours 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
428 PM EDT FRI JUL 18 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0230 PM    SEA CLIFF                 NY   WIND DAMAGE
07/18/97   NASSAU                         EXTENSIVE DAMAGE REPORTED
                                          BY NASSAU COUNTY EOC IN
                                          SEA CLIFF...SANDS POINT..
                                          AND ELMONT.

0230 PM    PARAMUS                   NJ
07/18/97   BERGEN                         *** 1 DEAD ***
                                          TREE FELL KILLING PARKING
                                          LOT ATTENDANT AT PARAMUS
                                          COUNTRY CLUB. INITIAL
                                          REPORT.

0235 PM    BABYLON                   NY   60 MPH TSTM GUST
07/18/97   SUFFOLK                        ESTIMATED IN NORTH BABYLON

0245 PM    FARMINGDALE RPBLC ARPT    NY   60 MPH TSTM GUST
07/18/97   SUFFOLK                        SQUALL AT REPUBLIC AIRPORT

0250 PM    BABYLON                   NY   1 INCH HAIL
07/18/97   SUFFOLK

0250 PM    DEER PARK                 NY   WIND DAMAGE
07/18/97   SUFFOLK                        *** 12 INJ ***
                                          ROOFS BLOWN OFF TWO
                                          BUILDINGS...INITIAL
                                          ESTIMATE OF INJURIES TO
                                          PEOPLE INSIDE BUILDINGS.

0252 PM    DEER PARK                 NY   .75 INCH HAIL
07/18/97   SUFFOLK

0308 PM    BOHEMIA                   NY   58 MPH TSTM GUST
07/18/97   SUFFOLK
Local storm report, Jul 18, 5:58 PM EDT, 3 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
600 PM EDT FRI JUL 18 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0250 PM    DEER PARK                 NY   WIND DAMAGE
07/18/97   SUFFOLK                        *** 1 INJ ***
                                          TOP LAYER OF FACTORY PLANT
                                          ROOF STRIPPED OFF. GARAGE
                                          DOOR AND WINDOWS BLOWN
                                          INTO THE FACTORY. DEBRIS
                                          BLOWN ABOUT 300 YARDS,
                                          SOME FELL ONTO CARS.
Local storm report, Jul 18, 6:00 PM EDT, 3 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
600 PM EDT FRI JUL 18 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0250 PM    DEER PARK                 NY   WIND DAMAGE
07/18/97   SUFFOLK                        *** 1 INJ ***
                                          TOP LAYER OF FACTORY PLANT
                                          ROOF STRIPPED OFF. GARAGE
                                          DOOR AND WINDOWS BLOWN
                                          INTO THE FACTORY. DEBRIS
                                          BLOWN ABOUT 300 YARDS,
                                          SOME FELL ONTO CARS.
Local storm report, Jul 18, 6:22 PM EDT, 3 hours before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
622 PM EDT FRI JUL 18 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0428 PM    HAMDEN                    CT   60 MPH TSTM GUST
07/18/97   NEW HAVEN

0429 PM    NEW HAVEN                 CT   .75 INCH HAIL
07/18/97   NEW HAVEN

0435 PM    GUILFORD                  CT   WIND DAMAGE
07/18/97   NEW HAVEN                      10 INCH DIAMETER TREE DOWN

0448 PM    GUILFORD                  CT   50 MPH TSTM GUST
07/18/97   NEW HAVEN
Local storm report, Jul 18, 6:23 PM EDT, 2 hours 59 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
622 PM EDT FRI JUL 18 1997

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0428 PM    HAMDEN                    CT   60 MPH TSTM GUST
07/18/97   NEW HAVEN

0429 PM    NEW HAVEN                 CT   .75 INCH HAIL
07/18/97   NEW HAVEN

0435 PM    GUILFORD                  CT   WIND DAMAGE
07/18/97   NEW HAVEN                    4  10 INCH DIAMETER TREE DOWN

0448 PM    GUILFORD                  CT   50 MPH TSTM GUST
07/18/97   NEW HAVEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 8:13 PM EDTSevere Thunderstorm WarningOKXNassau47 min
Jul 18, 8:22 PM EDTSevere Thunderstorm WarningOKXSuffolk68 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.