Alert archive / New York / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 4, NWS New York, NY

April 19, 2002Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Apr 19, 2002, 2:07 PM EDT for Westchester County, New York. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 19, 2002, 2:07 PM EDT (18:07 UTC)
Expired: Apr 19, 2002, 2:45 PM EDT
In force: 38 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 18:06 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 19, 12:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 6.1 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: 19 J/kg
Mixed-layer CIN: -368 J/kg
Mixed-layer LCL: 1055 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KOKX 191807
SVROKX
NYC119-191845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
207 PM EDT FRI APR 19 2002

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WESTCHESTER COUNTY IN SOUTHEAST NEW YORK

* UNTIL 245 PM EDT.

* AT 201 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 8 MILES WEST OF YORKTOWN HEIGHTS
  TO 4 MILES SOUTH OF OSSINING...MOVING SOUTHEAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE IN THE VICINITY OF...
  YORKTOWN HEIGHTS AND HAWTHORNE AROUND 220 PM.
  MOUNT KISCO AND WHITE PLAINS AIRPORT AROUND 230 PM.
  BEDFORD AROUND 240 PM.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER.
REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WINDS IN EXCESS
OF 55 MPH...LARGE DAMAGING HAIL...DEADLY LIGHTNING...AND VERY HEAVY
RAIN.

$$

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN UPTON NY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 500 PM FRIDAY
AFTERNOON FOR SOUTHERN CONNECTICUT AND SOUTHEAST NEW YORK.

LAT...LON 4131 7390 4112 7391 4103 7365 4122 7356

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 1:55 PM EDT	Severe Thunderstorm Warning	OKX	Rockland	50 min
Apr 19, 3:59 PM EDT	Severe Thunderstorm Warning	OKX	Orange	46 min
Apr 19, 5:50 PM EDT	Special Marine Warning	OKX		55 min
Apr 19, 5:54 PM EDT	Severe Thunderstorm Warning	OKX	Richmond	51 min
Apr 19, 5:58 PM EDT	Severe Thunderstorm Warning	OKX	Kings, New York, Queens	47 min
Apr 19, 6:16 PM EDT	Severe Thunderstorm Warning	OKX	Nassau	29 min

Nearby

Severe Thunderstorm Warnings in New York, 2002 Every severe thunderstorm warning in 2002

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; radar from the NEXRAD Level II archive.