Alert archive / New York / Tornado Warnings in 2011

Tornado Warning 9, NWS New York, NY

August 28, 2011Nassau County, Suffolk County, New York

NWS New York, NY issued this tornado warning at Aug 28, 2011, 4:46 AM EDT for Nassau County, Suffolk County, New York. It was in force for 29 min. 1 report 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: Aug 28, 2011, 4:46 AM EDT (08:46 UTC)
Expired: Aug 28, 2011, 5:15 AM EDT
In force: 29 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Nassau County, NY, Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 46 km from the middle of the area, began a volume at 08:48 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
Aug 28, 5:00 AM EDT	NON-TSTM WND DMG	Lindenhurst, NY	MULTIPLE TREES DOWN IN LINDENHURST. TIME OF EVENT UNKNOWN.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Aug 27, 7:56 PM EDT	Tornado Watch	SPC	9 hr
Aug 28, 4:38 AM EDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 00:00Z, 8.8 hours before the alert went out and 46 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: 957 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 110 m²/s²
0-3 km storm-relative helicity: 269 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.

700 
WFUS51 KOKX 280846
TOROKX
NYC059-103-280915-
/O.NEW.KOKX.TO.W.0009.110828T0846Z-110828T0915Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
446 AM EDT SUN AUG 28 2011

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN NASSAU COUNTY IN SOUTHEAST NEW YORK...
  SUFFOLK COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 515 AM EDT...

* AT 444 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR CAPTREE
  STATE PARK...OR NEAR ROBERT MOSES STATE PARK...MOVING NORTHWEST AT
  45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BAY
  SHORE...BABYLON...LINDENHURST...DEER PARK...FARMINGDALE...
  MELVILLE...LEVITTOWN...PLAINVIEW...WOODBURY...HICKSVILLE...
  SYOSSET...WESTBURY...BROOKVILLE...OYSTER BAY...PORT WASHINGTON...
  GLEN COVE AND BAYVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 AM SUNDAY MORNING FOR
SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND SOUTHEAST NEW YORK.

&&

LAT...LON 4064 7335 4066 7327 4068 7326 4066 7338
      4083 7375 4084 7372 4083 7371 4084 7372
      4086 7367 4085 7366 4087 7366 4092 7355
      4072 7319 4071 7323 4069 7326 4064 7323
      4067 7313 4066 7309 4062 7330
TIME...MOT...LOC 0846Z 123DEG 38KT 4068 7326

$$
SJN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 9:47 PM EDT	Areal Flood Advisory	OKX	Orange, Putnam, Rockland, Westchester	4 hr
Aug 28, 12:00 AM EDT	Areal Flood Warning	OKX	Putnam, Rockland, Westchester	35 hr
Aug 28, 12:05 AM EDT	Areal Flood Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond	20 hr
Aug 28, 3:03 AM EDT	Areal Flood Advisory	OKX	Suffolk	6 hr
Aug 28, 3:07 AM EDT	Areal Flood Warning	OKX	Orange	36 hr
Aug 28, 3:48 AM EDT	Tornado Warning	OKX	Kings, Nassau, Queens	27 min
Aug 28, 5:36 AM EDT	Special Weather Statement	OKX	Suffolk	24 min
Aug 28, 7:57 AM EDT	River Flood Warning	OKX	Orange, Ulster	36 hr
Aug 28, 8:59 AM EDT	Areal Flood Advisory	OKX	Suffolk	2 hr
Aug 28, 7:58 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond	4 hr

Nearby

Tornado Warnings in New York, 2011 Every tornado warning in 2011 Tornadoes 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.