Alert archive / New Jersey / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 29, NWS New York, NY

July 9, 1990Essex County, Morris County, Union County, New Jersey

NWS New York, NY issued this severe thunderstorm warning at Jul 9, 1990, 3:45 PM EDT for Essex County, Morris County, Union County, New Jersey. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jul 9, 1990, 3:45 PM EDT (19:45 UTC)
Expired
Jul 9, 1990, 4:30 PM EDT
In force
45 min
Issued by
NWS New York, NY
Area
Whole counties

Counties Essex County, NJ, Morris County, NJ, Union County, NJ

The radar

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

The nearest sounding before it

Atlantic City In, NJ (KACY), launched 12:00Z, 7.8 hours before the alert went out and 147 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 1990-07-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 684 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 1990-07-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 square meters per square second.1939Sfc1 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
684 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
614 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KNYC 091948
SVRNYC
NJC027-013-039-092030-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
345 PM EDT MON JUL 9 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 430 PM EDT FOR
PEOPLE IN THE FOLLOWING COUNTIES

   IN THE STATE OF NEW JERSEY
      MORRIS...ESSEX..UNION

POTENTIALLY SEVERE THUNDERSTORMS WERE BEING FOLLOWED ON RADAR MOVING
TO THE EAST SOUTHEAST ACROSS WARREN COUNTY AT 340 PM EDT. THE STORMS WILL
MOVE EAST SOUTHEAST AT 35 TO 40 MILES AN HOUR AND MIGHT CONTAIN STRONG
WIND GUSTS TO OVER 55 MILES AN HOUR ALONG WITH LARGE HAIL AND HEAVY
RAIN AND DANGEROUS LIGHTNING.
IF YOU ARE CAUGHT OUTSIDE...FIND 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.

TJG

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, 3:30 PM EDT, 15 minutes before
SPECIAL WEATHER STATEMENT  AND  WEATHER MAP DISCUSSION FOR
NORTHERN NEW JERSEY AND EXTREME SOUTHEASTERN NEW YORK
NATIONAL WEATHER SERVICE NEW YORK NY
330 PM EDT MON JUL 9 1990

...A SEVERE THUNDERSTORM WATCH COVERS THE NORTHERN HALF OF NEW JERSEY
...AND NEW YORK CITY AND NASSAU COUNTY IN NEW YORK...TIL 10 PM...

A COLD FRONT WAS MOVING EASTSOUTHEASTWARD THROUGH CENTRAL NEW YORK AND
CENTRAL PENNSYLVANIA AT MIDAFTERNOON. THE VERY WARM HUMID AND UNSTABLE
AIRMASS IN FRONT OF THIS FRONT IS A PRIME AREA FOR THE FORMATION OF
VERY STRONG AND POSSIBLY SEVERE THUNDERSTORMS FOR THE REMAINDER OF
THIS AFTERNOON AND EARLY TONIGHT. TEMPERATURES WERE IN THE UPPER 80S
AND LOW 90S...AND HUMIDITIES WERE QUITE HIGH. AT 3 PM...A STRONG
THUNDERSTORM CELL WAS MOVING INTO CENTRAL NEW JERSEY. IN FACT...
CENTRAL NEW JERSEY COULD BE THE FOCUS OF MUCH OF THE STORM ACTIVITY
THIS AFTERNOON AND EVENING. HOWEVER...ALL AREA RESIDENTS NEED TO
REMAIN ALERT TO CHANGING WEATHER CONDITIONS THIS AFTERNOON AND
EVENING.

AFTER THE FRONT MOVES SOUTHEAST OF OUR AREA TONIGHT...WE LOOK FOR
EQUALLY WARM BUT SOMEWHAT LESS HUMID WEATHER FOR TUESDAY. CONTINUED
LOW PRESSURE IN THE UPPER PART OF THE ATMOSPHERE COULD PROVIDE A
RETURN TO SHOWER CHANCES FOR WEDNESDAY...BUT TEMPERATURES COULD EASE A
BIT BY THEN.

FURTHER STATEMENTS WILL BE ISSUED AS CONDITIONS WARRANT...SO STAY
TUNED TO NOAA WEATHER RADIO OR COMMERCIAL RADIO AND TV FOR FURTHER
WEATHER UPDATES...AS WELL AS POSSIBLE WARNINGS.

JRP

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 3:05 PM EDTSevere Thunderstorm WarningOKXMiddlesex, Monmouth85 min
Jul 9, 3:05 PM EDTSevere Thunderstorm WarningOKXHunterdon, Warren85 min
Jul 9, 3:05 PM EDTSevere Thunderstorm WarningOKXSomerset85 min
Jul 9, 4:25 PM EDTSevere Thunderstorm WarningOKXMiddlesex, Morris, Somerset, Union65 min
Jul 9, 4:25 PM EDTSevere Thunderstorm WarningOKXBergen, Essex, Passaic65 min
Jul 9, 4:25 PM EDTSevere Thunderstorm WarningOKXMonmouth65 min
Jul 9, 4:25 PM EDTSevere Thunderstorm WarningOKXHudson65 min

Nearby

Severe Thunderstorm Warnings in New Jersey, 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; the sounding from the Mesonet's radiosonde archive.