Alert archive / New York / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 33, NWS New York, NY

July 15, 1992Nassau County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 15, 1992, 7:30 PM EDT for Nassau County, New York. It was in force for 60 min.

The area

The counties it named.

The facts

Issued
Jul 15, 1992, 7:30 PM EDT (23:30 UTC)
Expired
Jul 15, 1992, 8:30 PM EDT
In force
60 min
Issued by
NWS New York, NY
Area
Whole counties

County Nassau County, NY

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 11.5 hours before the alert went out and 162 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, Atlantic City In, NJ at 12:00Z on 1992-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1693 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, Atlantic City In, NJ at 12:00Z on 1992-07-15The 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
1693 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1217 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.7

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 15, 2:35 PM EDT, 4 hours 55 minutes before
NYZ014>017-NJZ001-005-007-015-160200-

SPECIAL WEATHER STATEMENT - STRONG THUNDERSTORMS POSSIBLE
AND WEATHER MAP DISCUSSION
NATIONAL WEATHER SERVICE NEW YORK NY
235 PM EDT WED JUL 15 1992

...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHEASTERN NEW YORK
AND NORTHERN NEW JERSEY TIL 9 PM...

...STRONG THUNDERSTORMS ARE LIKELY THIS AFTERNOON AND EVENING...ALONG
WITH THE THREAT OF LOCALIZED FLOODING...

A FRONT WAS DRAPED THROUGH SOUTHEASTERN NEW YORK AT MIDAFTERNOON. A
SULTRY AND UNSTABLE AIRMASS WAS IN PLACE OVER THE TRI-STATE REGION...
AND THE HEAT OF THE DAY WAS BEGINNING TO SET OFF THUNDERSTORMS AT 230
PM. STORMS WERE BEGINNING TO FORM OVER THE LOWER HUDSON VALLEY AND
OVER NORTHEASTERN PENNSYLVANIA. HELPING STORMS TO FORM WAS THE
APPROACH OF AN UPPER LEVEL LOW PRESSURE SYSTEM.

OUR ATMOSPHERE IS VERY UNSTABLE...MEANING THAT STORMS WILL GROW
RAPIDLY ONCE THEY GET STARTED SINCE SURFACE TEMPERATURES ARE VERY WARM
AND UPPER AIR TEMPERATURES ARE COLD. THE HIGH AMOUNT OF MOISTURE IS
ALSO A FACTOR WHICH WILL CAUSE STORMS TO GROW QUICKLY. THIS HIGH
HUMIDITY THROUGH A DEEP LAYER IN THE ATMOSPHERE IS ALSO SIGNIFICANT
BECAUSE SOME STORMS WILL CAUSE LOCALLY HEAVY RAINS WHICH COULD RESULT
IN FLOODING OF LOW-LYING AND POORLY-DRAINED AREAS DUE TO THE LARGE
VOLUME OF RAIN IN A SHORT TIME.

A SEVERE THUNDERSTORM WATCH MEANS THAT SEVERE STORMS ARE POSSIBLE IN
AND NEAR THE WATCH AREA...SO WATCH THE SKY TO SEE IF STORMS ARE
APPROACHING YOUR LOCATION. ALSO...LISTEN FOR POSSIBLE WARNINGS FOR
YOUR COUNTY WHICH MEAN SEVERE WEATHER HAS BEEN DETECTED OR SPOTTED SO
THAT YOU CAN TAKE PROTECTIVE ACTION. HAZARDS TO GUARD AGAINST ARE
STRONG DAMAGING WINDS...HAIL...AND ESPECIALLY CLOUD TO GROUND
LIGHTNING. THE BEST PROTECTION IS AFFORDED BY MOVING INSIDE A STURDY
BUILDING UNTIL THE STORMS PASS. MOTORISTS WILL ALSO NEED TO WATCH OUT
FOR THE EVENING RUSH...AS PONDING OF WATER ON ROADS COULD CAUSE A LOSS
OF CONTROL AND HEAVY RAINS CAN LOWER VISIBILITY ABRUPTLY.

PLEASE REMAIN AWARE OF THE LATEST WEATHER UPDATES...INCLUDING THE
POSSIBLE ISSUANCE OF WARNINGS OR ADDITIONAL WATCHES FOR THE REST OF
TODAY AND EARLY TONIGHT...SINCE CONDITIONS CAN CHANGE RAPIDLY FROM ONE
HOUR TO THE NEXT. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL
COMMERCIAL RADIO OR TELEVISION STATIONS FOR CHANGING WEATHER
CONDITIONS.

ONCE THE FRONT SETTLES SOUTHEAST OF OUR REGION DURING TONIGHT...STORM
ACTIVITY SHOULD DIMINISH THIS EVENING OR BY MIDNIGHT...AND LEAVE US
WITH PARTLY CLOUDY SKIES AND LESS HUMID CONDITIONS FOR THURSDAY AND
THURSDAY NIGHT. AN APPROACHING WARM FRONT FRIDAY COULD GIVE RISE TO
MORE SCATTERED SHOWERS OR THUNDERSHOWERS DURING FRIDAY.

FURTHER STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.

JRP
Special weather statement, Jul 15, 2:46 PM EDT, 4 hours 44 minutes before
SPECIAL WEATHER STATEMENT AND RADAR SUMMARY
NATIONAL WEATHER SERVICE NEW YORK NY
245 PM EDT WED JULY 15 1992

...PLEASE DO NOT USE AFTER 4 PM...

...SEVERE THUNDERSTORM WATCH NUMBER 626 REMAINS IN EFFECT
FOR SOUTHEASTERN NEW YORK...INCLUDING NEW YORK CITY AND LONG ISLAND
AND MOST OF NEW JERSEY UNTIL 900 PM EDT...

RADAR INDICATED THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS
PENNSYLVANIA BETWEEN SCRANTON AND HARRISBURG. THESE THUNDERSTORMS
HAVE INCREASED IN INTENSITY AND COVERAGE OVER THE LAST HOUR.

ISOLATED RAIN SHOWERS WERE FOUND NEAR HARTFORD CONNECTICUT AND
PITTSFIELD MASSACHUSETTS.

THE THUNDERSTORMS AND SHOWERS WERE MOVING EAST AT 40 MPH.

A SEVERE THUNDERSTORMS WATCH MEANS THAT CONDITIONS ARE FAVORABLE
FOR THE FORMATION OF SEVERE THUNDERSTORMS IN AND CLOSE TO
THE WATCH AREA.

STAY TUNED TO NOAA WEATHER RADIO FOR LATER STATEMENTS AND
POSSIBLE WARNINGS.
Special weather statement, Jul 15, 3:11 PM EDT, 4 hours 19 minutes before
NYZ014>017-NJZ001-005-007-015-152100-

SPECIAL WEATHER STATEMENT - STRONG THUNDERSTORM OVER EXTREME NORTHERN
  WESTCHESTER COUNTY
NATIONAL WEATHER SERVICE NEW YORK NY
310 PM EDT WED JUL 15 1992

...A VERY STRONG THUNDERSTORM WAS LOCATED ALONG THE PUTNAM -
WESTCHESTER COUNTY NEW YORK BORDER...

AT 305 PM THIS THUNDERSTORM WAS MOVING INTO SOUTHERN PUTNAM COUNTY...
BUT THE NORTHERN FRINGES OF WESTCHESTER COUNTY COULD GET SOME EFFECT
FROM THIS STORM. WATCH OUT FOR DANGEROUS LIGHTNING AND STRONG GUSTY
WINDS...AS WELL AS HEAVY RAIN...AS THIS THUNDERSTORM MOVES
EASTNORTHEASTWARD AROUND 30 MILES AN HOUR. THE TOWNS OF SHRUB OAK AND
JEFFERSON VALLEY MAY BE IN THE PATH OF THIS STORM.

FURTHER STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT.

JRP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 3:37 PM EDTSevere Thunderstorm WarningOKXMonmouth68 min
Jul 15, 3:47 PM EDTSevere Thunderstorm WarningOKXMonmouth58 min
Jul 15, 4:07 PM EDTSevere Thunderstorm WarningOKXWarren53 min
Jul 15, 5:25 PM EDTSevere Thunderstorm WarningOKXHunterdon, Somerset50 min
Jul 15, 5:34 PM EDTSevere Thunderstorm WarningOKXEssex, Morris, Union41 min
Jul 15, 6:04 PM EDTSevere Thunderstorm WarningOKXHunterdon, Warren56 min
Jul 15, 6:08 PM EDTSevere Thunderstorm WarningOKXBergen52 min
Jul 15, 6:40 PM EDTFlash Flood WarningOKXHunterdon, Warren2 hr
Jul 15, 6:48 PM EDTFlash Flood WarningOKXMorris, Somerset57 min
Jul 15, 6:48 PM EDTSevere Thunderstorm WarningOKXMorris, Somerset57 min
Jul 15, 7:12 PM EDTFlash Flood WarningOKXBergen, Essex, Passaic63 min
Jul 15, 7:12 PM EDTFlash Flood WarningOKXMiddlesex, Monmouth63 min
Jul 15, 7:12 PM EDTFlash Flood WarningOKXHudson63 min
Jul 15, 7:12 PM EDTFlash Flood WarningOKXUnion63 min
Jul 15, 7:12 PM EDTSevere Thunderstorm WarningOKXMiddlesex, Monmouth, Union63 min
Jul 15, 7:12 PM EDTSevere Thunderstorm WarningOKXBergen, Essex, Hudson63 min
Jul 15, 7:12 PM EDTSevere Thunderstorm WarningOKXPassaic63 min
Jul 15, 3:15 PM EDTSevere Thunderstorm WarningOKXWestchester30 min
Jul 15, 5:19 PM EDTSevere Thunderstorm WarningOKXWestchester26 min
Jul 15, 5:48 PM EDTSevere Thunderstorm WarningOKXWestchester42 min
Jul 15, 6:33 PM EDTSevere Thunderstorm WarningOKXWestchester42 min
Jul 15, 6:33 PM EDTSevere Thunderstorm WarningOKXNassau, Suffolk42 min
Jul 15, 7:12 PM EDTFlash Flood WarningOKXRichmond63 min
Jul 15, 7:12 PM EDTSevere Thunderstorm WarningOKXRichmond63 min
Jul 15, 7:30 PM EDTFlash Flood WarningOKXKings, Nassau, Queens60 min
Jul 15, 7:30 PM EDTFlash Flood WarningOKXNew York60 min
Jul 15, 7:30 PM EDTSevere Thunderstorm WarningOKXKings, Queens60 min
Jul 15, 7:30 PM EDTSevere Thunderstorm WarningOKXNew York60 min
Jul 15, 7:36 PM EDTFlash Flood WarningOKXSuffolk69 min
Jul 15, 7:36 PM EDTSevere Thunderstorm WarningOKXSuffolk69 min
Jul 15, 7:49 PM EDTTornado WarningOKXQueens26 min
Jul 15, 3:27 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region, Naugatuck Valley Planning Region2 hr
Jul 15, 4:55 PM EDTSevere Thunderstorm WarningOKXGreater Bridgeport Planning Region65 min
Jul 15, 5:27 PM EDTFlash Flood WarningOKXGreater Bridgeport Planning Region2 hr

Nearby

Severe Thunderstorm Warnings in New York, 1992Every severe thunderstorm warning in 1992

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.