Alert archive / New York / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 57, NWS New York, NY

July 9, 1997Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 9, 1997, 6:05 PM EDT for Westchester County, New York. It was in force for 55 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 9, 1997, 6:05 PM EDT (22:05 UTC)
Expired: Jul 9, 1997, 7:00 PM EDT
In force: 55 min
Issued by: NWS New York, NY
Area: Whole counties

County Westchester County, NY

The radar

The Brookhaven radar (KOKX), 81 km from the middle of the area, began a volume at 22:04 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
Jul 9, 6:10 PM EDT	Thunderstorm Wind 76	Ossining, 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
Jul 9, 1:15 PM EDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 10.1 hours before the alert went out and 81 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: 64 J/kg
Mixed-layer CIN: -104 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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

Special weather statement, Jul 9, 1:20 PM EDT, 4 hours 45 minutes before

SPECIAL WEATHER STATEMENT AND WEATHER MAP DISCUSSION
FOR EXTREME SOUTHEASTERN NEW YORK NORTHEASTERN NEW JERSEY
AND SOUTHERN CONNECTICUT
NATIONAL WEATHER SERVICE NEW YORK
120 PM EDT WED JUL 9 1997

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM...

AN APPROACHING COLD FRONT WILL CLASH WITH THE WARM...HUMID AND
UNSTABLE AIRMASS OVER THE REGION TRIGGERING SHOWERS AND
THUNDERSTORMS THIS AFTERNOON THROUGH EARLY TONIGHT. SOME OF THE
THUNDERSTORMS MAY BE SEVERE PRODUCING DAMAGING WINDS...LARGE HAIL AND
HEAVY DOWNPOURS. KEEP AN EYE TO THE SKY. WARNINGS AND STATEMENTS WILL
BE ISSUED AS NECESSARY.

THE FRONT WILL MOVE VERY SLOWLY SOUTHEAST TONIGHT...SO SHOWERS AND
THUNDERSTORMS WILL STILL BE OCCURRING UNTIL THE PREDAWN HOURS.
HOWEVER...MOST OF THE SEVERE THREAT SHOULD DIMINISH EARLY TONIGHT.

AFTER A LEFTOVER SHOWER OR SPRINKLE THURSDAY MORNING...SUNSHINE IS
EXPECTED TO RETURN BY AFTERNOON AS HIGH PRESSURE BUILDS IN.

FAIR AND WARM WEATHER IS THEN EXPECTED TO CLOSE OUT THE WORK-WEEK.

AMBERGER

Special weather statement, Jul 9, 1:22 PM EDT, 4 hours 43 minutes before

SPECIAL WEATHER STATEMENT AND WEATHER MAP DISCUSSION
FOR EXTREME SOUTHEASTERN NEW YORK NORTHEASTERN NEW JERSEY
AND SOUTHERN CONNECTICUT
NATIONAL WEATHER SERVICE NEW YORK
120 PM EDT WED JUL 9 1997

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM...

AN APPROACHING COLD FRONT WILL CLASH WITH THE WARM...HUMID AND
UNSTABLE AIRMASS OVER THE REGION TRIGGERING SHOWERS AND
THUNDERSTORMS THIS AFTERNOON THROUGH EARLY TONIGHT. SOME OF THE
THUNDERSTORMS MAY BE SEVERE PRODUCING DAMAGING WINDS...LARGE HAIL AND
HEAVY DOWNPOURS. KEEP AN EYE TO THE SKY. WARNINGS AND STATEMENTS WILL
BE ISSUED AS NECESSARY.

THE FRONT WILL MOVE VERY SLOWLY SOUTHEAST TONIGHT...SO SHOWERS AND
THUNDERSTORMS WILL STILL BE OCCURRING UNTIL THE PREDAWN HOURS.
HOWEVER...MOST OF THE SEVERE THREAT SHOULD DIMINISH EARLY TONIGHT.

AFTER A LEFTOVER SHOWER OR SPRINKLE THURSDAY MORNING...SUNSHINE IS
EXPECTED TO RETURN BY AFTERNOON AS HIGH PRESSURE BUILDS IN.

FAIR AND WARM WEATHER IS THEN EXPECTED TO CLOSE OUT THE WORK-WEEK.

AMBERGER

Special weather statement, Jul 9, 3:00 PM EDT, 3 hours 5 minutes before

SPECIAL WEATHER STATEMENT AND WEATHER MAP DISCUSSION
FOR EXTREME SOUTHEASTERN NEW YORK NORTHEASTERN NEW JERSEY
AND SOUTHERN CONNECTICUT
NATIONAL WEATHER SERVICE NEW YORK
300 PM EDT WED JUL 9 1997

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM...

A STRONG COLD FRONT WILL MOVE ACROSS THE TRI-STATE AREA THIS EVENING
AND TONIGHT...TRIGGERING SHOWERS AND THUNDERSTORMS. SOME OF THE
THUNDERSTORMS MAY BE SEVERE PRODUCING DAMAGING WINDS...LARGE HAIL
AND HEAVY DOWNPOURS. HEAVY DOWNPOURS MAY CAUSING FLOODING OF
ROADWAYS...ESPECIALLY IN POOR DRAINAGE AND LOW LYING AREAS. KEEP AN
EYE TO THE SKY. WARNINGS AND STATEMENTS WILL BE ISSUED AS NECESSARY.

THE SHOWERS AND THUNDERSTORMS WILL TAPERING OFF TO SCATTERED SHOWERS
AS THE FRONT PASSES. WINDS WILL SHIFT TO THE NORTHWEST AND USHERING
DRIER AIR INTO THE REGION.

HIGH PRESSURE WILL BUILD INTO THE REGION DURING THE DAY
THURSDAY...RESULTING IN FAIR AND LESS HUMID DAY. HIGH PRESSURE WILL
THEN MAINTAIN CONTROL OF THE AREA INTO THE WEEKEND. SO WE CAN
EXPECTED MOSTLY SUNNY DAYS AND MOSTLY CLEAR NIGHTS.

AMBERGER

Special weather statement, Jul 9, 3:02 PM EDT, 3 hours 3 minutes before

SPECIAL WEATHER STATEMENT AND WEATHER MAP DISCUSSION
FOR EXTREME SOUTHEASTERN NEW YORK NORTHEASTERN NEW JERSEY
AND SOUTHERN CONNECTICUT
NATIONAL WEATHER SERVICE NEW YORK
300 PM EDT WED JUL 9 1997

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM...

A STRONG COLD FRONT WILL MOVE ACROSS THE TRI-STATE AREA THIS EVENING
AND TONIGHT...TRIGGERING SHOWERS AND THUNDERSTORMS. SOME OF THE
THUNDERSTORMS MAY BE SEVERE PRODUCING DAMAGING WINDS...LARGE HAIL
AND HEAVY DOWNPOURS. HEAVY DOWNPOURS MAY CAUSING FLOODING OF
ROADWAYS...ESPECIALLY IN POOR DRAINAGE AND LOW LYING AREAS. KEEP AN
EYE TO THE SKY. WARNINGS AND STATEMENTS WILL BE ISSUED AS NECESSARY.

THE SHOWERS AND THUNDERSTORMS WILL TAPERING OFF TO SCATTERED SHOWERS
AS THE FRONT PASSES. WINDS WILL SHIFT TO THE NORTHWEST AND USHERING
DRIER AIR INTO THE REGION.

HIGH PRESSURE WILL BUILD INTO THE REGION DURING THE DAY
THURSDAY...RESULTING IN FAIR AND LESS HUMID DAY. HIGH PRESSURE WILL
~THEN MAINTAIN CONTROL OF THE AREA INTO THE WEEKEND. SO WE CAN
EXPECTED MOSTLY SUNNY DAYS AND MOSTLY CLEAR NIGHTS.

AMBERGER

Local storm report, Jul 9, 5:23 PM EDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
526 PM EDT WED JUL 09 1997

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

0230 PM    GARDNERTOWN               NY   WIND DAMAGE
07/09/97   ORANGE                         WIRES DOWN IN FOSTERTOWN

0250 PM    STEWART AFB               NY   58 MPH TSTM GUST
07/09/97   ORANGE

0328 PM    LAKE CARMEL               NY   WIND DAMAGE
07/09/97   PUTNAM                         TREES DOWN ON WIRES

0345 PM    BREWSTER                  NY   WIND DAMAGE
07/09/97   PUTNAM                         TREES DOWN

Local storm report, Jul 9, 5:26 PM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
526 PM EDT WED JUL 09 1997

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

0230 PM    GARDNERTOWN               NY   WIND DAMAGE
07/09/97   ORANGE                         WIRES DOWN IN FOSTERTOWN

0250 PM    STEWART AFB               NY   58 MPH TSTM GUST
07/09/97   ORANGE

0328 PM    LAKE CARMEL               NY   WIND DAMAGE
07/09/97   PUTNAM                         TREES DOWN ON WIRES

0345 PM    BREWSTER                  NY   WIND DAMAGE
07/09/97   PUTNAM                         TREES DOWN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 9, 2:15 PM EDT	Severe Thunderstorm Warning	OKX	Orange	60 min
Jul 9, 3:30 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	60 min
Jul 9, 3:34 PM EDT	Severe Thunderstorm Warning	OKX	Orange	56 min
Jul 9, 4:28 PM EDT	Severe Thunderstorm Warning	OKX	Putnam	62 min
Jul 9, 4:31 PM EDT	Severe Thunderstorm Warning	OKX	Orange	59 min
Jul 9, 6:05 PM EDT	Flash Flood Warning	OKX	Westchester	55 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.