Alert archive / New York / Tornado Warnings in 2007

Tornado Warning 6, NWS New York, NY

October 11, 2007Nassau County, New York

NWS New York, NY issued this tornado warning at Oct 11, 2007, 4:30 PM EDT for Nassau County, New York. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Oct 11, 2007, 4:30 PM EDT (20:30 UTC)
Expired: Oct 11, 2007, 4:51 PM EDT
In force: 21 min
Issued by: NWS New York, NY
Area: Storm-based polygon

County Nassau County, NY

The radar

The Brookhaven radar (KOKX), 68 km from the middle of the area, began a volume at 20:34 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, 8.5 hours before the alert went out and 68 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: 6 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 110 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 
WFUS51 KOKX 112030
TOROKX
NYC059-112115-
/O.NEW.KOKX.TO.W.0006.071011T2030Z-071011T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE UPTON NY
430 PM EDT THU OCT 11 2007

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHWESTERN NASSAU COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 515 PM EDT...

* AT 425 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR
  OCEANSIDE...OR ABOUT NEAR LONG BEACH...MOVING NORTH AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  OCEANSIDE...WOODMERE AND CEDARHURST BY 435 PM...
  LYNBROOK...VALLEY STREAM AND BALDWIN BY 440 PM...
  ELMONT AND HEMPSTEAD BY 450 PM...
  GARDEN CITY BY 455 PM...
  MINEOLA BY 500 PM...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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.

LAT...LON 4079 7369 4082 7358 4062 7359 4062 7361
      4061 7360 4060 7360 4060 7374
TIME...MOT...LOC 2030Z 180DEG 18KT 4061 7367

$$

MPS

1 follow-up statement

000 
WWUS51 KOKX 112051
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE UPTON NY
450 PM EDT THU OCT 11 2007

NYC059-112100-
/O.CAN.KOKX.TO.W.0006.000000T0000Z-071011T2115Z/
NASSAU NY-
450 PM EDT THU OCT 11 2007

...THE TORNADO WARNING FOR SOUTHWESTERN NASSAU COUNTY IS CANCELLED...

LAT...LON 4079 7369 4082 7358 4062 7359 4062 7361
      4061 7360 4060 7360 4060 7374
TIME...MOT...LOC 2050Z 180DEG 18KT 4071 7367

$$

MPS

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 3:40 PM EDT	Special Marine Warning	OKX		35 min
Oct 11, 4:03 PM EDT	Tornado Warning	OKX	Nassau	27 min
Oct 11, 4:09 PM EDT	Special Marine Warning	OKX		51 min
Oct 11, 4:27 PM EDT	Flash Flood Warning	OKX	Nassau	2 hr
Oct 11, 5:04 PM EDT	Flash Flood Warning	OKX	Nassau	116 min
Oct 11, 5:13 PM EDT	Flash Flood Warning	OKX	Westchester	3 hr
Oct 11, 5:13 PM EDT	Severe Thunderstorm Warning	OKX	Nassau	16 min
Oct 11, 5:15 PM EDT	Special Marine Warning	OKX		30 min
Oct 11, 5:41 PM EDT	Special Marine Warning	OKX		49 min
Oct 11, 5:55 PM EDT	Flash Flood Warning	OKX	Bronx, Kings, New York, Queens	2 hr

Nearby

Tornado Warnings in New York, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.