Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 73, NWS New York, NY

August 15, 2012Rockland County, Westchester County, New York; Bergen County, New Jersey

NWS New York, NY issued this severe thunderstorm warning at Aug 15, 2012, 4:48 PM EDT for Rockland County, Westchester County, New York; Bergen County, New Jersey. It was in force for 57 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 15, 2012, 4:48 PM EDT (20:48 UTC)
Expired
Aug 15, 2012, 5:45 PM EDT
In force
57 min
Issued by
NWS New York, NY
Area
Storm-based polygon

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

What was reported inside it

TimeReportWhereRemark
Aug 15, 5:00 PM EDTTSTM WND DMGNew City, NYNUMEROUS TREES DOWN ON WIRES AROUND NEW CITY

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, 8.8 hours before the alert went out and 91 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 2012-08-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1897 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2012-08-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
1897 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
686 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.1

Open this sounding in Storm Lab

The text

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

741 
WUUS51 KOKX 152048
SVROKX
NJC003-NYC087-119-152145-
/O.NEW.KOKX.SV.W.0073.120815T2048Z-120815T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
448 PM EDT WED AUG 15 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTCHESTER COUNTY IN SOUTHEAST NEW YORK...
  NORTHEASTERN BERGEN COUNTY IN NORTHEAST NEW JERSEY...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 545 PM EDT...

* AT 445 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  NANUET...AND MOVING EAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HAVERSTRAW...NORWOOD...TAPPAN...ORANGEBURG...WHITE PLAINS...UPPER
  NYACK...TARRYTOWN...OSSINING...NYACK...NORTH TARRYTOWN...MOUNT
  KISCO...HAWTHORNE...HARRISON AND DOBBS FERRY

LAT...LON 4114 7423 4128 7374 4111 7371 4109 7372
      4106 7370 4101 7369 4097 7408 4108 7409
TIME...MOT...LOC 2048Z 270DEG 3KT 4111 7399

$$

NV
1 follow-up statement
879 
WWUS51 KOKX 152144
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
544 PM EDT WED AUG 15 2012

NJC003-NYC087-119-152154-
/O.EXP.KOKX.SV.W.0073.000000T0000Z-120815T2145Z/
ROCKLAND NY-BERGEN NJ-WESTCHESTER NY-
544 PM EDT WED AUG 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTCHESTER...NORTHEASTERN
BERGEN AND ROCKLAND COUNTIES WILL EXPIRE AT 545 PM EDT...

THE WARNING WILL BE ALLOWED TO EXPIRE AS THE STORM HAS MOVED NORTH 
OF THE REGION.

LAT...LON 4114 7423 4128 7374 4111 7371 4109 7372
      4106 7370 4101 7369 4097 7408 4108 7409
TIME...MOT...LOC 2144Z 270DEG 3KT 4111 7393

$$

NV

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 12:38 AM EDTSpecial Weather StatementOKXNassau67 min
Aug 15, 1:28 AM EDTAreal Flood AdvisoryOKXNassau, Suffolk92 min
Aug 15, 1:32 AM EDTSpecial Weather StatementOKXSuffolk58 min
Aug 15, 2:21 AM EDTSpecial Weather StatementOKXSuffolk54 min
Aug 15, 2:36 AM EDTSpecial Marine WarningOKX54 min
Aug 15, 3:25 AM EDTSpecial Marine WarningOKX65 min
Aug 15, 3:28 AM EDTSpecial Weather StatementOKXOrange62 min
Aug 15, 4:27 AM EDTSevere Thunderstorm WarningOKXPutnam, Westchester48 min
Aug 15, 5:17 AM EDTAreal Flood AdvisoryOKXPutnam, Westchester88 min
Aug 15, 6:09 AM EDTSpecial Marine WarningOKX66 min
Aug 15, 7:50 AM EDTSpecial Weather StatementOKXSuffolk70 min
Aug 15, 11:01 AM EDTSpecial Weather StatementOKXNassau29 min
Aug 15, 11:16 AM EDTFlash Flood WarningOKXNassau89 min
Aug 15, 11:25 AM EDTSevere Thunderstorm WarningOKXNassau, Suffolk50 min
Aug 15, 11:59 AM EDTSpecial Weather StatementOKXSuffolk61 min
Aug 15, 12:07 PM EDTSpecial Marine WarningOKX83 min
Aug 15, 12:09 PM EDTSevere Thunderstorm WarningOKXNassau, Suffolk51 min
Aug 15, 12:12 PM EDTFlash Flood WarningOKXSuffolk78 min
Aug 15, 12:21 PM EDTAreal Flood AdvisoryOKXSuffolk54 min
Aug 15, 12:21 PM EDTSevere Thunderstorm WarningOKXSuffolk54 min
Aug 15, 12:50 PM EDTSpecial Weather StatementOKXNew York, Queens55 min
Aug 15, 1:09 PM EDTAreal Flood AdvisoryOKXKings, Queens81 min
Aug 15, 1:23 PM EDTFlash Flood WarningOKXKings, Nassau, Queens80 min
Aug 15, 1:24 PM EDTSevere Thunderstorm WarningOKXKings, New York, Queens51 min
Aug 15, 1:33 PM EDTSpecial Marine WarningOKX87 min
Aug 15, 1:50 PM EDTAreal Flood AdvisoryOKXSuffolk85 min
Aug 15, 2:06 PM EDTSpecial Weather StatementOKXNassau54 min
Aug 15, 3:34 PM EDTFlash Flood WarningOKXKings, Queens116 min
Aug 15, 3:41 PM EDTSevere Thunderstorm WarningOKXKings, Nassau, New York, Queens43 min
Aug 15, 3:57 PM EDTSpecial Marine WarningOKX69 min
Aug 15, 4:21 PM EDTSpecial Weather StatementOKXBronx, New York, Putnam, Rockland, Westchester54 min
Aug 15, 4:38 PM EDTAreal Flood AdvisoryOKXOrange, Rockland, Westchester112 min
Aug 15, 4:45 PM EDTAreal Flood AdvisoryOKXPutnam90 min
Aug 15, 5:11 PM EDTSpecial Marine WarningOKX2 hr
Aug 15, 5:37 PM EDTSpecial Weather StatementOKXRichmond53 min
Aug 15, 5:45 PM EDTFlash Flood WarningOKXRockland, Westchester50 min
Aug 15, 7:13 PM EDTSpecial Weather StatementOKXOrange62 min
Aug 15, 3:45 PM EDTSpecial Weather StatementOKXBergen, Passaic60 min
Aug 15, 4:02 PM EDTSevere Thunderstorm WarningOKXBergen, Passaic58 min

Nearby

Severe Thunderstorm Warnings in New York, 2012Severe Thunderstorm Warnings in New Jersey, 2012Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.