Alert archive / New York / Tornado Warnings in 2012

Tornado Warning 7, NWS New York, NY

September 8, 2012Rockland County, Westchester County, New York

NWS New York, NY issued this tornado warning at Sep 8, 2012, 11:27 AM EDT for Rockland County, Westchester County, New York. It was in force for 33 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
Sep 8, 2012, 11:27 AM EDT (15:27 UTC)
Expired
Sep 8, 2012, 12:00 PM EDT
In force
33 min
Issued by
NWS New York, NY
Area
Storm-based polygon

Counties Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 101 km from the middle of the area, began a volume at 15:30 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.

IssuedProductOfficeLasted
Sep 8, 11:18 AM EDTTornado WatchSPC10 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 3.5 hours before the alert went out and 101 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2012-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 173 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2012-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
173 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

Open this sounding in Storm Lab

The text

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

696 
WFUS51 KOKX 081527
TOROKX
NYC087-119-081600-
/O.NEW.KOKX.TO.W.0007.120908T1527Z-120908T1600Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
1127 AM EDT SAT SEP 8 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* TORNADO WARNING FOR...
  WESTCHESTER COUNTY IN SOUTHEAST NEW YORK...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK...

* UNTIL NOON EDT...

* AT 1126 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR MONSEY...
  MOVING NORTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW
  CITY...POMONA...HAVERSTRAW...PEEKSKILL AND YORKTOWN HEIGHTS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

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 4113 7412 4132 7399 4134 7384 4128 7374
      4107 7403
TIME...MOT...LOC 1527Z 214DEG 22KT 4114 7404

$$

GOODMAN
2 follow-up statements
837 
WWUS51 KOKX 081544
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1144 AM EDT SAT SEP 8 2012

NYC087-119-081600-
/O.CON.KOKX.TO.W.0007.000000T0000Z-120908T1600Z/
ROCKLAND NY-WESTCHESTER NY-
1144 AM EDT SAT SEP 8 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL NOON EDT FOR WESTCHESTER
AND NORTHERN ROCKLAND COUNTIES...

AT 1142 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A POSSIBLE TORNADO. THIS TORNADO WAS LOCATED NEAR STONY 
POINT...OR NEAR HAVERSTRAW...MOVING NORTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
BUCHANAN AND PEEKSKILL. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4132 7399 4134 7383 4131 7379 4119 7397
      4122 7403
TIME...MOT...LOC 1544Z 205DEG 29KT 4125 7397

$$

GOODMAN
419 
WWUS51 KOKX 081556
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
1156 AM EDT SAT SEP 8 2012

NYC087-119-081606-
/O.EXP.KOKX.TO.W.0007.000000T0000Z-120908T1600Z/
ROCKLAND NY-WESTCHESTER NY-
1156 AM EDT SAT SEP 8 2012

...THE TORNADO WARNING FOR WESTCHESTER AND ROCKLAND COUNTIES WILL
EXPIRE AT NOON EDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM SATURDAY EVENING FOR
SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND SOUTHEAST NEW YORK.

LAT...LON 4132 7399 4134 7383 4131 7379 4119 7397
      4122 7403
TIME...MOT...LOC 1556Z 205DEG 29KT 4134 7392

$$

GOODMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 8, 10:01 AM EDTAreal Flood AdvisoryOKXBronx, Kings, New York, Queens, Westchester119 min
Sep 8, 10:29 AM EDTSpecial Marine WarningOKX16 min
Sep 8, 10:34 AM EDTTornado WarningOKXKings, Queens26 min
Sep 8, 10:47 AM EDTFlash Flood WarningOKXKings, Queens118 min
Sep 8, 10:50 AM EDTSpecial Marine WarningOKX25 min
Sep 8, 10:55 AM EDTTornado WarningOKXKings, Queens35 min
Sep 8, 11:22 AM EDTSpecial Weather StatementOKXRockland53 min
Sep 8, 11:54 AM EDTTornado WarningOKXWestchester36 min
Sep 8, 12:50 PM EDTSpecial Weather StatementOKXRockland, Westchester55 min
Sep 8, 1:28 PM EDTTornado WarningOKXRockland, Westchester18 min
Sep 8, 1:40 PM EDTSpecial Weather StatementOKXPutnam65 min
Sep 8, 2:24 PM EDTSevere Thunderstorm WarningOKXPutnam, Westchester36 min
Sep 8, 3:39 PM EDTSevere Thunderstorm WarningOKXOrange81 min
Sep 8, 3:51 PM EDTSevere Thunderstorm WarningOKXOrange, Richmond, Rockland84 min
Sep 8, 5:04 PM EDTSevere Thunderstorm WarningOKXBronx, Kings, Nassau, New York, Orange, Putnam and 4 more86 min
Sep 8, 5:13 PM EDTSpecial Marine WarningOKX92 min
Sep 8, 5:16 PM EDTTornado WarningOKXRockland29 min
Sep 8, 6:30 PM EDTSpecial Weather StatementOKXNassau60 min
Sep 8, 6:35 PM EDTSpecial Weather StatementOKXNassau25 min
Sep 8, 6:44 PM EDTSpecial Marine WarningOKX61 min
Sep 8, 6:47 PM EDTSpecial Marine WarningOKX58 min
Sep 8, 7:36 PM EDTSpecial Weather StatementOKXSuffolk54 min
Sep 8, 7:46 PM EDTSpecial Marine WarningOKX59 min

Nearby

Tornado Warnings in New York, 2012Every tornado warning in 2012Tornadoes in 2012

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.