Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS New York, NY

June 30, 20215 counties in New York; Essex County, Hudson County, Union County, New Jersey

NWS New York, NY issued this severe thunderstorm warning at Jun 30, 2021, 9:39 PM EDT for 5 counties in New York; Essex County, Hudson County, Union County, New Jersey. It was in force for 51 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
Jun 30, 2021, 9:39 PM EDT (01:39 UTC)
Expired
Jun 30, 2021, 10:30 PM EDT
In force
51 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Essex County, NJ, Hudson County, NJ, Union County, NJ, Kings County, NY, Nassau County, NY, New York County, NY, Queens County, NY, Richmond County, NY

The radar

The Philadelphia radar (KDIX), 74 km from the middle of the area, began a volume at 01:40 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 30, 10:04 PM EDTTSTM WND DMG1 Ssw Greenwich Village, NYNYPD REPORTS WIRES DOWN IN LOWER MANHATTAN.

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, 1.7 hours before the alert went out and 110 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 00:00Z on 2021-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1308 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 00:00Z on 2021-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 81 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
1308 J/kg
Mixed-layer CIN
-130 J/kg
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
81 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.1

Open this sounding in Storm Lab

The text

As transmitted.

535 
WUUS51 KOKX 010139
SVROKX
NJC013-017-039-NYC047-059-061-081-085-010230-
/O.NEW.KOKX.SV.W.0032.210701T0139Z-210701T0230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
939 PM EDT Wed Jun 30 2021

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Hudson County in northeastern New Jersey...
  Central Union County in northeastern New Jersey...
  Southeastern Essex County in northeastern New Jersey...
  Queens County in southeastern New York...
  Richmond County in southeastern New York...
  Kings County in southeastern New York...
  New York (Manhattan) County in southeastern New York...
  Southwestern Nassau County in southeastern New York...

* Until 1030 PM EDT.

* At 938 PM EDT, severe thunderstorms were located along a line
  extending from SoHo to near Sayreville, moving east at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines.

* Locations impacted include...
  Newark, Jersey City, Jamaica, Elizabeth, Flatbush, Bayonne,
  Hoboken, Freeport, Linden, Valley Stream, Long Beach, Coney Island,
  Lynbrook, Woodmere and Harrison.

This includes the following New York State COVID tent sites 
Aqueduct Racetrack...
Staten Island OMH...
and Beverly Road in Brooklyn.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4049 7428 4050 7426 4052 7425 4055 7425
      4056 7421 4059 7421 4060 7422 4059 7428
      4061 7431 4060 7438 4078 7420 4070 7351
      4057 7364 4057 7376 4053 7394 4056 7395
      4056 7401 4060 7403 4053 7410 4050 7422
TIME...MOT...LOC 0138Z 276DEG 30KT 4072 7402 4047 7428 

HAIL...1.00IN
WIND...60MPH
 
$$

JM
2 follow-up statements
893 
WWUS51 KOKX 010216
SVSOKX

Severe Weather Statement
National Weather Service New York NY
1016 PM EDT Wed Jun 30 2021

NJC013-017-039-NYC061-085-010225-
/O.CAN.KOKX.SV.W.0032.000000T0000Z-210701T0230Z/
Hudson NJ-Union NJ-Essex NJ-Richmond NY-New York (Manhattan) NY-
1016 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR HUDSON...CENTRAL UNION...
SOUTHEASTERN ESSEX...RICHMOND AND NEW YORK (MANHATTAN) COUNTIES IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4056 7395 4056 7401 4058 7401 4066 7393
      4075 7392 4070 7351 4057 7364 4057 7376
      4053 7394
TIME...MOT...LOC 0215Z 276DEG 30KT 4069 7362 4044 7388 

$$

NYC047-059-081-010230-
/O.CON.KOKX.SV.W.0032.000000T0000Z-210701T0230Z/
Queens NY-Kings NY-Nassau NY-
1016 PM EDT Wed Jun 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT
FOR QUEENS...KINGS AND SOUTHWESTERN NASSAU COUNTIES...

At 1015 PM EDT, severe thunderstorms were located along a line
extending from Hempstead to near Sandy Hook, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and power lines.

Locations impacted include...
Jamaica, Flatbush, Freeport, Valley Stream, Long Beach, Coney Island,
Lynbrook, Woodmere, Rockaway Beach, Kennedy Airport, Forest Hills,
Canarsie, Hempstead, Elmont and Oceanside.

This includes the following New York State COVID tent site 
Aqueduct Racetrack.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4056 7395 4056 7401 4058 7401 4066 7393
      4075 7392 4070 7351 4057 7364 4057 7376
      4053 7394
TIME...MOT...LOC 0215Z 276DEG 30KT 4069 7362 4044 7388 

HAIL...<.75IN
WIND...60MPH
 
$$

JM
409 
WWUS51 KOKX 010231
SVSOKX

Severe Weather Statement
National Weather Service New York NY
1031 PM EDT Wed Jun 30 2021

NYC047-059-081-010240-
/O.EXP.KOKX.SV.W.0032.000000T0000Z-210701T0230Z/
Queens NY-Kings NY-Nassau NY-
1031 PM EDT Wed Jun 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR QUEENS...KINGS AND
SOUTHWESTERN NASSAU COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has
been allowed to expire.

LAT...LON 4056 7395 4056 7401 4058 7401 4066 7393
      4075 7392 4070 7351 4057 7364 4057 7376
      4053 7394
TIME...MOT...LOC 0230Z 276DEG 30KT 4068 7347 4043 7373 

$$

MW

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 8:29 PM EDTSpecial Marine WarningOKX61 min
Jun 30, 8:31 PM EDTSpecial Weather StatementOKXNassau44 min
Jun 30, 8:37 PM EDTSevere Thunderstorm WarningOKXSuffolk38 min
Jun 30, 8:41 PM EDTSpecial Weather StatementOKXBronx, New York49 min
Jun 30, 8:55 PM EDTSpecial Marine WarningOKX35 min
Jun 30, 9:06 PM EDTSpecial Weather StatementOKXNassau39 min
Jun 30, 9:07 PM EDTSpecial Weather StatementOKXRichmond38 min
Jun 30, 9:24 PM EDTSevere Thunderstorm WarningOKXNassau, Suffolk29 min
Jun 30, 9:30 PM EDTSpecial Marine WarningOKX60 min
Jun 30, 9:38 PM EDTSpecial Marine WarningOKX67 min
Jun 30, 9:57 PM EDTSpecial Weather StatementOKXBronx, New York33 min
Jun 30, 10:00 PM EDTSpecial Marine WarningOKX45 min
Jun 30, 10:22 PM EDTSpecial Weather StatementOKXNassau23 min
Jun 30, 10:45 PM EDTSpecial Weather StatementOKXNassau45 min
Jun 30, 11:27 PM EDTSpecial Weather StatementOKXSuffolk93 min
Jul 1, 10:47 AM EDTFlash Flood WatchOKXBronx, Kings, Nassau, New York, Queens, Richmond and 1 more10 hr
Jul 1, 7:42 PM EDTSpecial Marine WarningOKX50 min

Nearby

Severe Thunderstorm Warnings in New York, 2021Severe Thunderstorm Warnings in New Jersey, 2021Every severe thunderstorm warning in 2021

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.