Alert archive / New York / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 46, NWS New York, NY

July 18, 2012Nassau County, Suffolk County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 18, 2012, 3:23 PM EDT for Nassau County, Suffolk County, New York. It was in force for 52 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: Jul 18, 2012, 3:23 PM EDT (19:23 UTC)
Expired: Jul 18, 2012, 4:15 PM EDT
In force: 52 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Nassau County, NY, Suffolk County, NY

The radar

The Brookhaven radar (KOKX), 54 km from the middle of the area, began a volume at 19:24 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
Jul 18, 3:40 PM EDT	TSTM WND DMG	Old Brookville, NY	NUMEROUS TRESS DOWN ALONG CEDAR SWAMP RD NORTH OF 25A

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
Jul 18, 12:20 PM EDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.4 hours before the alert went out and 54 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: 2129 J/kg
Mixed-layer CIN: -147 J/kg
Mixed-layer LCL: 1491 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 95 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.

067 
WUUS51 KOKX 181923
SVROKX
NYC059-103-182015-
/O.NEW.KOKX.SV.W.0046.120718T1923Z-120718T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
323 PM EDT WED JUL 18 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN NASSAU COUNTY IN SOUTHEAST NEW YORK...
  WESTERN SUFFOLK COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 415 PM EDT...

* AT 319 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
  BAYVILLE...OR NEAR GLEN COVE...AND MOVING EAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  OYSTER BAY...COLD SPRING HARBOR...HUNTINGTON...CENTERPORT AND
  NORTHPORT

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM WEDNESDAY
EVENING FOR SOUTHERN CONNECTICUT AND NORTHEAST NEW JERSEY AND
SOUTHEAST NEW YORK.

&&

LAT...LON 4083 7368 4086 7368 4084 7366 4088 7366
      4091 7364 4092 7352 4090 7349 4093 7351
      4095 7349 4094 7344 4091 7341 4096 7340
      4093 7335 4092 7323 4087 7322 4086 7322
      4081 7366 4081 7368
TIME...MOT...LOC 1923Z 264DEG 20KT 4092 7360

$$
SEARS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 12:33 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	42 min
Jul 18, 12:36 PM EDT	Special Marine Warning	OKX		39 min
Jul 18, 12:39 PM EDT	Areal Flood Advisory	OKX	Westchester	81 min
Jul 18, 1:12 PM EDT	Special Marine Warning	OKX		63 min
Jul 18, 1:12 PM EDT	Severe Thunderstorm Warning	OKX	Orange	63 min
Jul 18, 1:15 PM EDT	Areal Flood Advisory	OKX	Orange	90 min
Jul 18, 1:19 PM EDT	Areal Flood Advisory	OKX	Bronx, Nassau, Queens	69 min
Jul 18, 1:19 PM EDT	Special Weather Statement	OKX	Bronx	56 min
Jul 18, 2:00 PM EDT	Areal Flood Advisory	OKX	Putnam, Rockland, Westchester	2 hr
Jul 18, 2:26 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Rockland	64 min
Jul 18, 2:36 PM EDT	Areal Flood Advisory	OKX	Orange	84 min
Jul 18, 2:50 PM EDT	Special Marine Warning	OKX		40 min
Jul 18, 2:55 PM EDT	Areal Flood Advisory	OKX	Westchester	72 min
Jul 18, 2:57 PM EDT	Severe Thunderstorm Warning	OKX	Westchester	33 min
Jul 18, 2:59 PM EDT	Special Marine Warning	OKX		61 min
Jul 18, 3:35 PM EDT	Special Marine Warning	OKX		25 min
Jul 18, 3:54 PM EDT	Special Weather Statement	OKX	Bronx, New York	66 min
Jul 18, 3:59 PM EDT	Special Marine Warning	OKX		46 min
Jul 18, 4:10 PM EDT	Areal Flood Advisory	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond and 1 more	2 hr
Jul 18, 4:15 PM EDT	Severe Thunderstorm Warning	OKX	Nassau, Queens, Suffolk	60 min
Jul 18, 4:34 PM EDT	Flash Flood Warning	OKX	Bronx, Kings, Nassau, New York, Queens	116 min
Jul 18, 4:41 PM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, New York, Queens	49 min
Jul 18, 5:08 PM EDT	Special Marine Warning	OKX		52 min
Jul 18, 7:00 PM EDT	Special Marine Warning	OKX		45 min
Jul 18, 7:09 PM EDT	Special Marine Warning	OKX		66 min
Jul 18, 7:58 PM EDT	Special Marine Warning	OKX		47 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.