Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS New York, NY

June 8, 2012Putnam County, Westchester County, New York

NWS New York, NY issued this severe thunderstorm warning at Jun 8, 2012, 2:24 PM EDT for Putnam County, Westchester County, New York. It was in force for 35 min. 3 reports 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
Jun 8, 2012, 2:24 PM EDT (18:24 UTC)
Expired
Jun 8, 2012, 2:59 PM EDT
In force
35 min
Issued by
NWS New York, NY
Area
Storm-based polygon

Counties Putnam County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 91 km from the middle of the area, began a volume at 18:27 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

TimeReportWhereRemark
Jun 8, 2:30 PM EDTHAIL 0.88Fahnestock State Park, NYNICKEL SIZE HAIL IN FAHNESTOCK STATE PARK.
Jun 8, 2:45 PM EDTHAIL 0.88Mahopac, NYNICKEL SIZE HAIL IN MAHOPAC.
Jun 8, 3:00 PM EDTHAIL 0.88Yorktown, NYNICKEL SIZE HAIL IN YORKTOWN.

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, 6.4 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 2012-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1476 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
55 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.

460 
WUUS51 KOKX 081824
SVROKX
NYC079-119-081915-
/O.NEW.KOKX.SV.W.0009.120608T1824Z-120608T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
224 PM EDT FRI JUN 8 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

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

* UNTIL 315 PM EDT...

* AT 219 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
  FAHNESTOCK STATE PARK...OR NEAR BEACON...AND MOVING SOUTHEAST AT 20
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAKE
  CARMEL...CARMEL...MAHOPAC...YORKTOWN HEIGHTS AND BREWSTER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4139 7354 4130 7355 4119 7370 4145 7397
      4150 7390 4151 7373
TIME...MOT...LOC 1824Z 314DEG 18KT 4146 7386

$$

GOODMAN
2 follow-up statements
015 
WWUS51 KOKX 081845
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
245 PM EDT FRI JUN 8 2012

NYC079-119-081915-
/O.CON.KOKX.SV.W.0009.000000T0000Z-120608T1915Z/
PUTNAM NY-WESTCHESTER NY-
245 PM EDT FRI JUN 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 PM EDT 
FOR NORTHERN WESTCHESTER AND PUTNAM COUNTIES...

AT 240 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED BETWEEN PUTNAM VALLEY AND MAHOPAC...MOVING SOUTHEAST AT 
25 MPH. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
YORKTOWN HEIGHTS AND GOLDEN'S BRIDGE. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4145 7376 4130 7355 4119 7370 4139 7391
TIME...MOT...LOC 1844Z 307DEG 20KT 4135 7382

$$

GOODMAN
872 
WWUS51 KOKX 081859
SVSOKX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NEW YORK NY
259 PM EDT FRI JUN 8 2012

NYC079-119-081906-
/O.CAN.KOKX.SV.W.0009.000000T0000Z-120608T1915Z/
PUTNAM NY-WESTCHESTER NY-
259 PM EDT FRI JUN 8 2012

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

THE THUNDERSTORM APPROACHING YORKTOWN HEIGHTS HAS WEAKENED AND NO 
LONGER APPEARS TO BE SEVERE. HEAVY RAIN...WIND GUSTS UP TO 35 
MPH...AND DANGEROUS CLOUD TO GROUND LIGHTNING ARE STILL EXPECTED. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO A 
THUNDERSTORM TO BE STRUCK BY LIGHTNING. 


LAT...LON 4145 7376 4130 7355 4119 7370 4139 7391
TIME...MOT...LOC 1856Z 314DEG 18KT 4135 7371

$$

GOODMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 8, 2:10 PM EDTSpecial Weather StatementOKXPutnam50 min
Jun 8, 3:36 PM EDTSpecial Weather StatementOKXWestchester39 min
Jun 8, 7:01 PM EDTSpecial Marine WarningOKX29 min
Jun 8, 7:05 PM EDTSpecial Weather StatementOKXKings, Queens55 min
Jun 8, 7:07 PM EDTSpecial Weather StatementOKXPutnam38 min

Nearby

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