Alert archive / New York / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 21, NWS New York, NY

June 23, 2011Bergen County, Passaic County, New Jersey; Orange County, Rockland County, Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Jun 23, 2011, 11:10 AM EDT for Bergen County, Passaic County, New Jersey; Orange County, Rockland County, Westchester County, New York. It was in force for 50 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 23, 2011, 11:10 AM EDT (15:10 UTC)
Expired: Jun 23, 2011, 12:00 PM EDT
In force: 50 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Bergen County, NJ, Passaic County, NJ, Orange County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 94 km from the middle of the area, began a volume at 15:11 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.

What was reported inside it

Time	Report	Where	Remark
Jun 23, 11:33 AM EDT	HAIL 1.75	1 Wsw Nyack, NY	GOLF BALL SIZED HAIL
Jun 23, 12:02 PM EDT	TSTM WND DMG	Armonk, NY	TREE DOWN ON WHIPPOORWILL CROSSING.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.2 hours before the alert went out and 94 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: 414 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 575 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

481 
WUUS51 KOKX 231510
SVROKX
NJC003-031-NYC071-087-119-231600-
/O.NEW.KOKX.SV.W.0021.110623T1510Z-110623T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1110 AM EDT THU JUN 23 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTCHESTER COUNTY IN SOUTHEAST NEW YORK...
  PASSAIC COUNTY IN NORTHEAST NEW JERSEY...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK...
  SOUTHERN ORANGE COUNTY IN SOUTHEAST NEW YORK...
  NORTHERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...

* UNTIL NOON EDT...

* AT 1107 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM SLOATSBURG TO HAWTHORNE...OR ALONG A LINE EXTENDING FROM
  SLOATSBURG TO RIDGEWOOD...AND MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  POMONA...MONSEY...PARAMUS...NANUET...NEW CITY...ORADELL...PEARL
  RIVER...HAVERSTRAW...BERGENFIELD...ORANGEBURG...TAPPAN...NORWOOD...
  UPPER NYACK...NYACK...OSSINING...NORTH TARRYTOWN...TARRYTOWN...
  DOBBS FERRY...YONKERS...HAWTHORNE...BRONXVILLE...WHITE PLAINS...
  SCARSDALE...NEW ROCHELLE...MOUNT KISCO AND HARRISON

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4130 7423 4125 7364 4112 7368 4110 7372
      4106 7370 4089 7376 4090 7383 4091 7384
      4093 7390 4091 7392 4095 7428 4098 7430
      4100 7434
TIME...MOT...LOC 1510Z 275DEG 20KT 4119 7411 4100 7417

$$

MALOIT

1 follow-up statement

842 
WWUS51 KOKX 231535
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1135 AM EDT THU JUN 23 2011

NJC031-NYC071-231545-
/O.CAN.KOKX.SV.W.0021.000000T0000Z-110623T1600Z/
ORANGE NY-PASSAIC NJ-
1135 AM EDT THU JUN 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR PASSAIC AND SOUTH CENTRAL
ORANGE COUNTIES IS CANCELLED...

LAT...LON 4128 7404 4125 7364 4112 7368 4110 7372
      4106 7370 4089 7376 4090 7383 4093 7390
      4091 7392 4101 7420 4110 7423 4112 7421
      4114 7424
TIME...MOT...LOC 1535Z 275DEG 20KT 4118 7393 4099 7399

$$

NJC003-NYC087-119-231600-
/O.CON.KOKX.SV.W.0021.000000T0000Z-110623T1600Z/
BERGEN NJ-ROCKLAND NY-WESTCHESTER NY-
1135 AM EDT THU JUN 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR
WESTCHESTER...ROCKLAND AND NORTHERN BERGEN COUNTIES...

AT 1133 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM HAVERSTRAW TO HARRINGTON PARK...OR ALONG A LINE
EXTENDING FROM HAVERSTRAW TO TAPPAN...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ORANGEBURG...CLOSTER...DEMAREST...NORTHVALE...CRESSKILL...UPPER
NYACK...NORWOOD...CROTON-ON-HUDSON...NYACK...SOUTH NYACK...
ROCKLEIGH...PIERMONT...GRAND VIEW-ON-HUDSON...OSSINING...ALPINE...
NORTH TARRYTOWN...TARRYTOWN...BRIARCLIFF MANOR...IRVINGTON...
HASTINGS-ON-HUDSON...DOBBS FERRY...YONKERS...ARDSLEY...ELMSFORD...
PLEASANTVILLE...HAWTHORNE...GREENVILLE...BRONXVILLE...MOUNT VERNON...
TUCKAHOE...HARTSDALE...THORNWOOD...EASTCHESTER...PELHAM...WHITE
PLAINS...SCARSDALE...NEW ROCHELLE...MOUNT KISCO...LARCHMONT...
HARRISON AND ARMONK

LAT...LON 4128 7404 4125 7364 4112 7368 4110 7372
      4106 7370 4089 7376 4090 7383 4093 7390
      4091 7392 4101 7420 4110 7423 4112 7421
      4114 7424
TIME...MOT...LOC 1535Z 275DEG 20KT 4118 7393 4099 7399

$$

MALOIT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 23, 10:13 AM EDT	Special Weather Statement	OKX	Bergen, Passaic	62 min
Jun 23, 10:33 AM EDT	Areal Flood Advisory	OKX	Passaic	117 min
Jun 23, 10:51 AM EDT	Flash Flood Warning	OKX	Bergen, Essex, Passaic	6 hr
Jun 23, 12:46 PM EDT	River Flood Warning	OKX	Bergen, Passaic	10 hr
Jun 23, 4:47 PM EDT	Areal Flood Warning	OKX	Bergen, Passaic	18 hr
Jun 23, 4:59 PM EDT	River Flood Warning	OKX	Bergen	11 hr
Jun 23, 12:59 AM EDT	Marine Dense Fog Advisory	OKX		9 hr
Jun 23, 8:55 AM EDT	Areal Flood Advisory	OKX	Orange	50 min
Jun 23, 9:45 AM EDT	Areal Flood Advisory	OKX	Orange	2 hr
Jun 23, 11:59 AM EDT	Severe Thunderstorm Warning	OKX	Westchester	46 min
Jun 23, 12:16 PM EDT	Areal Flood Advisory	OKX	Westchester	59 min
Jun 23, 12:23 PM EDT	Flash Flood Warning	OKX	Westchester	4 hr
Jun 23, 1:24 PM EDT	Areal Flood Advisory	OKX	Nassau, Suffolk	66 min
Jun 23, 1:58 PM EDT	Special Weather Statement	OKX	Suffolk	62 min
Jun 23, 2:03 PM EDT	Flash Flood Warning	OKX	Suffolk	117 min
Jun 23, 3:38 PM EDT	Flash Flood Warning	OKX	Suffolk	118 min

Nearby

Severe Thunderstorm Warnings in New York, 2011 Severe Thunderstorm Warnings in New Jersey, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.