Alert archive / New York / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 21, NWS New York, NY

July 1, 2015Greater Bridgeport Planning Region, Connecticut; 5 counties in New York; Bergen County, Hudson County, New Jersey

NWS New York, NY issued this severe thunderstorm warning at Jul 1, 2015, 4:34 AM EDT for Greater Bridgeport Planning Region, Connecticut; 5 counties in New York; Bergen County, Hudson County, New Jersey. It was in force for 41 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 1, 2015, 4:34 AM EDT (08:34 UTC)
Expired: Jul 1, 2015, 5:15 AM EDT
In force: 41 min
Issued by: NWS New York, NY
Area: Storm-based polygon

Counties Greater Bridgeport Planning Region, CT, Bergen County, NJ, Hudson County, NJ, Bronx County, NY, Nassau County, NY, New York County, NY, Rockland County, NY, Westchester County, NY

The radar

The Brookhaven radar (KOKX), 73 km from the middle of the area, began a volume at 08:36 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 1, 4:50 AM EDT	TSTM WND DMG	Paramus, NJ	TREE TOOK DOWN SEVERAL POWER AND UTILITY POLES ON CONTINENTAL DRIVE

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 00:00Z, 8.6 hours before the alert went out and 73 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1407 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 162 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.

221 
WUUS51 KOKX 010834
SVROKX
CTC001-NJC003-017-NYC005-059-061-087-119-010915-
/O.NEW.KOKX.SV.W.0021.150701T0834Z-150701T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NEW YORK NY
434 AM EDT WED JUL 1 2015

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN FAIRFIELD COUNTY IN SOUTHERN CONNECTICUT...
  HUDSON COUNTY IN NORTHEASTERN NEW JERSEY...
  BERGEN COUNTY IN NORTHEASTERN NEW JERSEY...
  NORTHWESTERN NASSAU COUNTY IN SOUTHEASTERN NEW YORK...
  BRONX COUNTY IN SOUTHEASTERN NEW YORK...
  NEW YORK COUNTY IN SOUTHEASTERN NEW YORK...
  ROCKLAND COUNTY IN SOUTHEASTERN NEW YORK...
  CENTRAL WESTCHESTER COUNTY IN SOUTHEASTERN NEW YORK...

* UNTIL 515 AM EDT

* AT 434 AM EDT...DOPPLER RADAR INDICATED A LINE OF SEVERE
  THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM NEAR
  ORADELL TO BERGENFIELD TO UPPER WEST SIDE...AND MOVING NORTHEAST AT
  40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  TAPPAN...NORWOOD...PEARL RIVER AND RIVERDALE AROUND 440 AM EDT.
  YONKERS...DOBBS FERRY...EAST TREMONT...BRONXVILLE AND ORANGEBURG
  AROUND 445 AM EDT.
  TARRYTOWN...NYACK...NORTH TARRYTOWN...THROGS NECK BRIDGE...
  SCARSDALE...UPPER NYACK...CO-OP CITY AND CARDINAL SPELLMAN HS
  AROUND 450 AM EDT.
  NEW ROCHELLE...WHITE PLAINS...OSSINING AND CITY ISLAND AROUND 455
  AM EDT.
  PORT CHESTER...HARRISON...SANDS POINT AND HAWTHORNE AROUND 500 AM
  EDT.
  GLEN COVE AND RYE AROUND 505 AM EDT.
  MOUNT KISCO...GREENWICH AND BAYVILLE AROUND 510 AM EDT.
  STAMFORD...NEW CANAAN...DARIEN AND BEDFORD AROUND 515 AM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4102 7410 4128 7370 4114 7348 4104 7349
      4105 7349 4100 7358 4089 7350 4091 7353
      4085 7365 4095 7373 4088 7379 4085 7367
      4086 7379 4084 7378 4084 7379 4087 7382
      4082 7380 4083 7374 4075 7404
TIME...MOT...LOC 0834Z 238DEG 33KT 4100 7404 4092 7398 4078 7399 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 3:17 AM EDT	Flash Flood Watch	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	3 hr
Jul 1, 4:48 AM EDT	Areal Flood Advisory	OKX	Greater Bridgeport Planning Region, Naugatuck Valley Planning Region	3 hr
Jul 1, 5:16 AM EDT	Special Weather Statement	OKX		29 min
Jul 1, 5:51 AM EDT	Special Weather Statement	OKX		39 min
Jul 1, 6:11 AM EDT	Areal Flood Advisory	OKX	Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region	3 hr
Jul 1, 6:20 AM EDT	Severe Thunderstorm Warning	OKX	Lower Connecticut River Valley Planning Region, Southeastern Connecticut Planning Region	55 min
Jul 1, 6:26 AM EDT	Special Weather Statement	OKX		34 min
Jun 30, 8:44 PM EDT	Special Weather Statement	OKX	Orange	46 min
Jun 30, 9:41 PM EDT	Areal Flood Advisory	OKX	Orange	4 hr
Jun 30, 10:51 PM EDT	Special Weather Statement	OKX	Orange	39 min
Jul 1, 3:20 AM EDT	Small Craft Advisory for Hazardous Seas	OKX		31 hr
Jul 1, 3:26 AM EDT	Areal Flood Advisory	OKX	Bronx, New York, Richmond, Westchester	3 hr
Jul 1, 3:32 AM EDT	Special Weather Statement	OKX	Orange	58 min
Jul 1, 3:38 AM EDT	Areal Flood Advisory	OKX	Orange	112 min
Jul 1, 4:01 AM EDT	Special Weather Statement	OKX	Kings, New York, Richmond, Rockland	44 min
Jul 1, 4:04 AM EDT	Special Marine Warning	OKX		86 min
Jul 1, 4:06 AM EDT	Special Marine Warning	OKX		84 min
Jul 1, 4:13 AM EDT	Severe Thunderstorm Warning	OKX	Bronx, Kings, Nassau, New York, Queens, Richmond	47 min
Jul 1, 4:19 AM EDT	Flash Flood Warning	OKX	Bronx, Kings, New York, Queens, Richmond, Westchester	116 min
Jul 1, 4:57 AM EDT	Special Weather Statement	OKX	Nassau	48 min
Jul 1, 5:09 AM EDT	Special Weather Statement	OKX	Putnam	51 min
Jul 1, 5:16 AM EDT	Special Marine Warning	OKX		89 min
Jul 1, 5:23 AM EDT	Special Marine Warning	OKX		2 hr
Jul 1, 5:34 AM EDT	Severe Thunderstorm Warning	OKX	Suffolk	56 min
Jul 1, 5:40 AM EDT	Areal Flood Advisory	OKX	Suffolk	3 hr
Jul 1, 6:49 AM EDT	Special Marine Warning	OKX		26 min
Jul 1, 7:14 AM EDT	Special Marine Warning	OKX		61 min
Jul 1, 7:59 AM EDT	Rip Current Statement	OKX	Kings, Nassau, Queens, Suffolk	13 hr

Nearby

Severe Thunderstorm Warnings in New York, 2015 Severe Thunderstorm Warnings in New Jersey, 2015 Severe Thunderstorm Warnings in Connecticut, 2015 Every severe thunderstorm warning in 2015

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.