Alert archive / New York / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 62, NWS New York, NY

July 19, 2002Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 19, 2002, 4:43 PM EDT for Westchester County, New York. It was in force for 62 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: Jul 19, 2002, 4:43 PM EDT (20:43 UTC)
Expired: Jul 19, 2002, 5:45 PM EDT
In force: 62 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 20:46 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 nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.7 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: 591 J/kg
Mixed-layer CIN: -115 J/kg
Mixed-layer LCL: 1078 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

184 
WUUS51 KOKX 192043
SVROKX
NYC119-192145-

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

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL AND SOUTHERN WESTCHESTER COUNTY IN SOUTHEAST NEW YORK

* UNTIL 545 PM EDT.

* AT 440 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES WEST OF NORTH TARRYTOWN...MOVING
  SOUTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE IN THE VICINITY OF...
  6 MILES SOUTHWEST OF OSSINING AROUND 500 PM.
  NORTH TARRYTOWN AROUND 505 PM.
  DOBBS FERRY AROUND 515 PM.
  HAWTHORNE AROUND 520 PM.
  WHITE PLAINS AND SCARSDALE AROUND 535 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.

LAT...LON 4117 7397 4103 7393 4093 7379 4111 7373

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.

NWS New York, NY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 19, 3:00 PM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jul 19, 3:00 PM EDT, 1 hour 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW YORK NY
300 PM EDT FRI JUL 19 2002

UNSTABLE AIRMASS OVR THE AREA WITH SCTD CONVECTION BREAKING OUT ACRS
THE LWR HUDSON VALLEY INTO NWRN CT WHERE FNTL BOUNDARY LIES. WEAK
SFC LO REMAINS OVR THE AREA. TSTMS PRODUCING RAIN...SOME HVY...NOT
EXPECTING ANY TSTMS TO BE SVR. MODLES CONSISTANT WITH MOVG THE SFC
WAVE SLOWLY TO THE ENE TNGT WITH THE FNTL BOUNDARY SINKING THRU THE
AREA. AVN KPS LO PRES ALNG  THE MID ATLC CST INTO SAT WITH
MEASURABLE PCPN. HAVE LEANED TWD NGM/ETA AND MVG PCPN OUT BY 04Z TO
05Z WITH CLRG. PROBLEM TNGT WL BE HOW DENSE FOG GETS ESPLY ACRS ERN
LI. VSBY SAT STILL SHOWING THE STATUS JUST OFF THE CST. DEVLOPING
WEAK NE FLOW AND WITH ANY PCPN COULD DEVLOP AREAS OF DENSE FOG. WITH
LIGHT WINDS ACRS RGN AND ANY PCPN PATCHY FOG POSSIBLE AND WL MENTION
ALL ZONES.

MARINE: NO PROBLEMS WITH THE SEAS AND WINDS THRU THE PD. REDUCED
VSYS THIS EVENING IN TSTMS AND LATE TNGTH IN FOG.

CT...NONE.
NY...NONE.
NJ...NONE.
MARINE...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 4:17 PM EDT	Severe Thunderstorm Warning	OKX	Rockland	43 min
Jul 19, 4:49 PM EDT	Flash Flood Warning	OKX	Rockland	41 min
Jul 19, 4:58 PM EDT	Severe Thunderstorm Warning	OKX	Rockland	32 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.