Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS New York, NY

May 26, 2012Rockland County, Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at May 26, 2012, 4:00 PM EDT for Rockland County, Westchester County, New York. It was in force for 47 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: May 26, 2012, 4:00 PM EDT (20:00 UTC)
Expired: May 26, 2012, 4:47 PM EDT
In force: 47 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 93 km from the middle of the area, began a volume at 20:03 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
May 26, 4:31 PM EDT	TSTM WND DMG	1 Sw Upper Nyack, NY	LARGE TREE DOWN ON CAR AT ROUTE 9W AND CHRISTIAN HERALD RD

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
May 26, 2:29 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 8.0 hours before the alert went out and 93 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: 144 J/kg
Mixed-layer CIN: -138 J/kg
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 105 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.

962 
WUUS51 KOKX 262000
SVROKX
NYC087-119-262100-
/O.NEW.KOKX.SV.W.0003.120526T2000Z-120526T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
400 PM EDT SAT MAY 26 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTCHESTER COUNTY IN SOUTHEAST NEW YORK...
  ROCKLAND COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 500 PM EDT...

* AT 359 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
  HAVERSTRAW...AND MOVING EAST AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO UPPER
  NYACK...NYACK...OSSINING...NORTH TARRYTOWN...YORKTOWN HEIGHTS...
  MOUNT KISCO AND HAWTHORNE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SATURDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4121 7414 4129 7403 4128 7364 4113 7366
      4110 7373 4103 7367 4114 7416
TIME...MOT...LOC 2000Z 278DEG 6KT 4119 7393

$$

DSW

1 follow-up statement

763 
WWUS51 KOKX 262047
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
447 PM EDT SAT MAY 26 2012

NYC087-119-262057-
/O.CAN.KOKX.SV.W.0003.000000T0000Z-120526T2100Z/
ROCKLAND NY-WESTCHESTER NY-
447 PM EDT SAT MAY 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTCHESTER AND ROCKLAND
COUNTIES IS CANCELLED...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM SATURDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

LAT...LON 4121 7414 4129 7403 4128 7364 4113 7366
      4110 7373 4103 7367 4114 7416
TIME...MOT...LOC 2047Z 278DEG 6KT 4118 7383

$$

DSW

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 12:45 AM EDT	Dense Fog Advisory	OKX	Nassau, Suffolk	8 hr
May 26, 1:58 PM EDT	Special Weather Statement	OKX	Orange	32 min
May 26, 2:19 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam	41 min
May 26, 2:33 PM EDT	Special Weather Statement	OKX	Rockland	42 min
May 26, 2:49 PM EDT	Severe Thunderstorm Warning	OKX	Rockland, Westchester	41 min
May 26, 3:01 PM EDT	Special Weather Statement	OKX	Putnam	59 min
May 26, 3:23 PM EDT	Areal Flood Advisory	OKX	Rockland, Westchester	82 min
May 26, 3:33 PM EDT	Special Weather Statement	OKX	Westchester	57 min
May 26, 3:55 PM EDT	Areal Flood Advisory	OKX	Rockland, Westchester	95 min
May 26, 4:52 PM EDT	Areal Flood Advisory	OKX	Rockland, Westchester	83 min

Nearby

Severe Thunderstorm Warnings in New York, 2012 Every 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; radar from the NEXRAD Level II archive.