Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS New York, NY

July 6, 2021Putnam County, New York

NWS New York, NY issued this severe thunderstorm warning at Jul 6, 2021, 5:08 PM EDT for Putnam County, New York. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 6, 2021, 5:08 PM EDT (21:08 UTC)
Expired
Jul 6, 2021, 5:40 PM EDT
In force
32 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Putnam County, NY

The radar

The Brookhaven radar (KOKX), 96 km from the middle of the area, began a volume at 21:07 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 6, 1:32 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 96 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 2021-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 230 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 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
230 J/kg
Mixed-layer CIN
-195 J/kg
Mixed-layer LCL
1202 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

215 
WUUS51 KOKX 062108
SVROKX
NYC079-062200-
/O.NEW.KOKX.SV.W.0034.210706T2108Z-210706T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
508 PM EDT Tue Jul 6 2021

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Putnam County in southeastern New York...

* Until 600 PM EDT.

* At 508 PM EDT, a severe thunderstorm was located over Fishkill, or
  over Beacon, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Mahopac, Lake Carmel, Brewster, Carmel, Fahnestock State Park,
  Patterson, Putnam Lake, Brewster Hill and Peach Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4152 7353 4137 7355 4135 7371 4144 7398
      4149 7393 4151 7370 4153 7360
TIME...MOT...LOC 2108Z 288DEG 27KT 4153 7393 

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

Goodman
2 follow-up statements
212 
WWUS51 KOKX 062126
SVSOKX

Severe Weather Statement
National Weather Service New York NY
526 PM EDT Tue Jul 6 2021

NYC079-062200-
/O.CON.KOKX.SV.W.0034.000000T0000Z-210706T2200Z/
Putnam NY-
526 PM EDT Tue Jul 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR PUTNAM COUNTY...

At 526 PM EDT, a severe thunderstorm was located near Lake Carmel, 
moving southeast at 25 mph. 

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Mahopac, Lake Carmel, Brewster, Carmel, Patterson, Putnam Lake, 
Brewster Hill and Peach Lake. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4141 7388 4150 7383 4151 7370 4153 7361
      4151 7353 4137 7355 4135 7371
TIME...MOT...LOC 2126Z 293DEG 24KT 4146 7375 

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

Goodman
757 
WWUS51 KOKX 062140
SVSOKX

Severe Weather Statement
National Weather Service New York NY
540 PM EDT Tue Jul 6 2021

NYC079-062149-
/O.CAN.KOKX.SV.W.0034.000000T0000Z-210706T2200Z/
Putnam NY-
540 PM EDT Tue Jul 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR PUTNAM COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened and no longer 
poses an immediate threat to life or property, so the warning has 
been cancelled. Gusty winds are still possible with this 
thunderstorm.

A Severe Thunderstorm Watch remains in effect until 10 PM. 

LAT...LON 4141 7388 4150 7383 4151 7370 4153 7361
      4151 7353 4137 7355 4135 7371
TIME...MOT...LOC 2138Z 288DEG 27KT 4143 7362 

$$

Goodman

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 6, 4:10 PM EDTSpecial Weather StatementOKXDutchess50 min
Jul 6, 4:43 PM EDTSpecial Weather StatementOKXOrange47 min
Jul 6, 5:15 PM EDTSpecial Weather StatementOKXOrange45 min
Jul 6, 5:49 PM EDTSevere Thunderstorm WarningOKXWestchester56 min
Jul 6, 5:53 PM EDTSevere Thunderstorm WarningOKXBronx, Kings, New York, Orange, Queens, Richmond and 2 more37 min
Jul 6, 5:56 PM EDTSpecial Marine WarningOKX94 min
Jul 6, 5:58 PM EDTSpecial Marine WarningOKX92 min
Jul 6, 6:24 PM EDTSpecial Marine WarningOKX2 hr
Jul 6, 6:28 PM EDTSevere Thunderstorm WarningOKXBronx, Kings, Nassau, New York, Queens, Richmond and 2 more47 min
Jul 6, 6:37 PM EDTSpecial Weather StatementOKXSuffolk38 min
Jul 6, 6:58 PM EDTSevere Thunderstorm WarningOKXSuffolk47 min
Jul 6, 7:07 PM EDTSpecial Marine WarningOKX98 min
Jul 6, 7:36 PM EDTAreal Flood AdvisoryOKXSuffolk114 min

Nearby

Severe Thunderstorm Warnings in New York, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.