Alert archive / New York / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 42, NWS New York, NY

August 13, 1990Rockland County, Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Aug 13, 1990, 9:00 PM EDT for Rockland County, Westchester County, New York. It was in force for 30 min. 2 reports 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
Aug 13, 1990, 9:00 PM EDT (01:00 UTC)
Expired
Aug 13, 1990, 9:30 PM EDT
In force
30 min
Issued by
NWS New York, NY
Area
Whole counties

Counties Rockland County, NY, Westchester County, NY

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Aug 13, 9:05 PM EDTThunderstorm Wind 0Rockland, NY
Aug 13, 9:10 PM EDTThunderstorm Wind 0Westchester, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Albany, NY (KALB), launched 00:00Z, 1.0 hours before the alert went out and 171 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, Albany, NY at 00:00Z on 1990-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 921 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, Albany, NY at 00:00Z on 1990-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 192 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
921 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
963 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
192 m²/s²
0-3 km storm-relative helicity
270 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNYC 140106
SVRNYC
NYC087-119-140130-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
900 PM EDT MON AUG 13 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 930 PM EDT FOR PEOPLE IN THE FOLLOWING
COUNTIES

   IN THE STATE OF NEW YORK
      ROCKLAND...WESTCHESTER

RADAR IN NEW YORK CITY SHOWED A SEVERE THUNDERSTORM OVER EASTERN
ROCKLAND COUNTY MOVING EAST AT 40 MIGLES AN HOUR. IT WILL SHORTLY
MOVE ACROSS WESTCHESTER COUNTY.

THIS THUNDERSTORM IS ACCOMPANIED BY VERY FREQUENT LIGHTNING...
HEAVY RAIN...DAMAGING WINDS...AND SOME HAIL.
<
SEEK SHELTER IF THREATENING WEATHER APPROACHES.

EY

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, Aug 13, 5:30 PM EDT, 3 hours 30 minutes before
NJZ001-005-007-015-NYZ014.017-132300
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK CITY NEW YORK
530 PM EDT MON AUG 13 1990

...DO NOT USE AFTER 7 PM EDT...

...STRONG THUNDERSTORMS OVER EASTERN PENNSYLVANIA...

AN AREA OF THUNDERSTORMS WERE ALONG A LINE FROM THE PENNSYLVANIA WEST
VIRGINIA BORDER NORTH OF MARTINSBURG NORTH THROUGH EASTERN PENNSYLVANIA TO
SOUTHEASTERN NEW YORK STATE UP TO WARREN COUNTY OF NEW YORK STATE.

THERE WERE THUNDERSTORMS WITH VERY HEAVY RAIN STRONG GUSTY WINDS AND
DANGEROUS LIGHTNING LOCATED OVER LUZERNE COUNTY NEAR HAZLETON AND NORTH
THROUGH LACKAANNA COUNTY JUST TO THE SOUTH OF SCRANTON. WITH THE PRESENT
MOVEMENT AND SPEED THIS DANGwEROUS THUNDERSTORMS SHOULD BE MOVING INTO WHITE
HAVEN AND MOSCOW OF EASTERN PENNSYLVANIA WITHIN THE NEXT HALF HOUR.

MOVEMENT WAS EAST AT 35 MILES AN HOUR.
KLEIN
Special weather statement, Aug 13, 6:30 PM EDT, 2 hours 30 minutes before
NJZ001-005-007-015-NYZ014.017-140000
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK CITY NEW YORK
630 PM EDT MON AUG 13 1990

...DO NOT USE AFTER 8 PM EDT...

...STRONG THUNDERSTORMS OVER EASTERN PENNSYLVANIA AND SOUTHEASTERN NEW
YORK STATE...

AN AREA OF THUNDERSTORMS WERE ALONG A LINE FROM THE PENNSYLVANIA WEST
VIRGINIA BORDER EAST OF HAGERSTOWN NORTH THROUGH EASTERN PENNSYLVANIA TO
SOUTHEASTERN NEW YORK STATE UP TO MONTGOMERY COUNTY OF NEW YORK STATE.

THERE WERE THUNDERSTORMS WITH VERY HEAVY RAIN STRONG GUSTY WINDS AND
DANGEROUS LIGHTNING LOCATED OVER SCHUYKILL COUNTY NEAR POTTSVILLE AND NORTH
THROUGH CARBON AND MONROE COUNTY JUST WEST OF STROUDSBURG. WITH THE PRESENT
MOVEMENT AND SPEED THESE DANGEROUS THUNDERSTORMS SHOULD BE MOVING INTO
NORTHHAMPTON AND THE BUSKILL AREA WITHIN THE NEXT HALF HOUR.

MOVEMENT WAS EAST AT 35 MILES AN HOUR.

KLEIN
Special weather statement, Aug 13, 7:30 PM EDT, 1 hour 30 minutes before
NJZ001-005-007-015-NYZ014>017-140100
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK CITY NEW YORK
730 PM EDT MON AUG 13 1990

...DO NOT USE AFTER 9 PM EDT...

...STRONG THUNDERSTORMS OVER EASTERN PENNSYLVANIA WESTERN NEW JERSEY AND
SOUTHEASTERN NEW YORK STATE.

AN AREA OF THUNDERSTORMS WERE ALONG A LINE FROM SOUTHEASTERN PENNSYLVANIA
OVER LANCASTER COUNTY NORTH THROUGH THE ALLENTOWN AREA AND THEN NORTHEAST
TO ULSTER COUNTY OF NEW YORK STATE.

THERE WERE THUNDERSTORMS WITH VERY HEAVY RAIN STRONG GUSTY WINDS
DANGEROUS LIGHTNING  AND POSSIBLE HAIL OVER NORTHERN NORTHAMPTON COUNTY OF
PENNSYLVANIA. THIS AREA OF THUNDERTORMS EXTENDED INTO WARREN COUNTY OF
NORTHERN NEW JERSEY. ANOTHER AREA OF THUNDERSTORMS WITH VERY HEAVY RAIN
WAS MOVING INTO ULSTER COUNTY OF SOUTHEAST NEW YORK STATE.

PERSON IN THE EFFECTED AREA SHOULD BE ON THE LOOK OUT FOR DANGEROUS
CONDITIONS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY.

MOVEMENT WAS EAST AT 30 MILES AN HOUR.

KLEIN
Special weather statement, Aug 13, 8:06 PM EDT, 54 minutes before
CTZ001-002-004-005-140130-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BRIDGEPORT CT
804 PM EDT MON AUG 13 1990

A LINE OF THUNDERSTORMS WITH HEAVY RAIN WILL BE MOVING INTO NORTHERN
FAIRFIELD COUNTY BETWEEN 830 AND 930 PM.

AT 800 PM...RADAR SHOWED A LINE OF THUNDERSTORMS WITH HEAVY RAIN IN
THE HUDSON RIVER VALLEY OF NEW YORK STATE AND WAS MOVING EAST AT 25 TO
30 MPH.  SOME THUNDERSTORMS IN THIS LINE HAD A HISTORY OF SEVERE WEATHER
WITH IT.
PERSONS IN FAIRFIELD COUNTY...AT THIS TIME MAINLY THE NORTHWESTERN AREA
AROUND CANDLEWOOD LAKE...SHERMAN...NEW FAIRFIELD...DANBURY AND
RIDGEFIELD SHOULD BE ON THE LOOKOUT AS THIS LINE OF THUNDERSTORMS MOVES
INTO YOU AREA.  ALL PERSONS NOT ONLY IN FAIRFIELD COUNTY BUT NEW HAVEN
COUNTY AS WELL SHOULD BE NEAR A RADIO OR TV AS THIS AREA OF WEATHER
MOVES ACROSS THE REGION.  THE CITY OF NEW HAVEN WITH THE INTERNATIONAL
TENNIS SHOW AT THE YALE BOWL SHOULD KEEP A EYE OUT THE THUNDERSTORMS.

HAZZARD
Special weather statement, Aug 13, 8:35 PM EDT, 25 minutes before
NJZ001-005-007-015-NYZ014>017-140100
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK CITY NEW YORK
830 PM EDT MON AUG 13 1990

...DO NOT USE AFTER 10 PM EDT...

...STRONG THUNDERSTORMS OVER NEW JERSEY AND SOUTHEASTERN NEW YORK STATE.

AN AREA OF THUNDERSTORMS WERE ALONG A LINE FROM SOUTHEASTERN PENNSYLVANIA
JUST WEST OF PHILADELPHI NORTH THROUGH THUNTERDON AND MORRIS COUNTIES OF
NEW JERSEY TO ORANGE COUNTY OF SOUTHEAST NEW YORK STATE.

THERE WERE THUNDERSTORMS WITH VERY HEAVY RAIN STRONG GUSTY WINDS
DANGEROUS LIGHTNING  AND POSSIBLE HAIL OVER CHESTER AND MONTGOMERY COUNTIES
OF SOUTHEAST PENNSYLVANIA. THESE THUNDERSTORMS EXTENDED INTO NORTHERN
HUNTERDON AND AND SOUTHERN MORRIS COUNTIES JUST SOUTH OF MORRISTOWN.
ANOTHER AREA OF STRONG THUNDERSTORMS WAS OVER ORANGE COUNTY OF SOUTHEAS
NEW YORK STATE.

AT THE PRESENT RATE OF SPEED AND DIRECTION SEVERE THUNDERSTORMS SHOULD BE
MOVING INTO UNION AND ESSEX COUNI8TES WITHIN THE NEXT FIFTEEN MINUTES TO
HALF HOUR.

IF THREATENING CONDITION ARE OBSERVED BE PREPARED TO MOVE TO A PLACE OF
SAFTEY IMMEDIATELY.

MOVEMENT WAS EAST AT 30 MILES AN HOUR.

KLEIN



Nearby

Severe Thunderstorm Warnings in New York, 1990Every severe thunderstorm warning in 1990

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.