Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 64, NWS New York, NY

August 11, 2021Orange County, Putnam County, New York

NWS New York, NY issued this severe thunderstorm warning at Aug 11, 2021, 5:51 PM EDT for Orange County, Putnam County, New York. It was in force for 39 min. 2 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: Aug 11, 2021, 5:51 PM EDT (21:51 UTC)
Expired: Aug 11, 2021, 6:30 PM EDT
In force: 39 min
Issued by: NWS New York, NY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Orange County, NY, Putnam County, NY

The radar

The Brookhaven radar (KOKX), 116 km from the middle of the area, began a volume at 21:51 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
Aug 11, 6:15 PM EDT	TSTM WND DMG	1 Ne Balmville, NY	2 TREES DOWN ON FOSTERTOWN RD NEAR ROUTE 9W. THREE INTERSECTIONS WITH NO POWER ALONG ROUTE 9W.
Aug 11, 6:22 PM EDT	TSTM WND DMG	Cold Spring, NY	POLICE DEPARTMENT REPORTS WIRES DOWN NEAR MAPLE TER AND CEDER ST.

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, 9.9 hours before the alert went out and 115 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: 977 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

656 
WUUS51 KOKX 112151
SVROKX
NYC071-079-112230-
/O.NEW.KOKX.SV.W.0064.210811T2151Z-210811T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
551 PM EDT Wed Aug 11 2021

The National Weather Service in Upton NY has issued a

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

* Until 630 PM EDT.

* At 550 PM EDT, a severe thunderstorm was located near New Windsor,
  or near Newburgh, moving east at 20 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.

* This severe thunderstorm will be near...
  Gardnertown around 555 PM EDT.
  Newburgh and West Point around 605 PM EDT.
  Cold Spring around 615 PM EDT.
  Fahnestock State Park around 630 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4155 7399 4153 7400 4150 7400 4150 7399
      4146 7400 4144 7398 4149 7393 4151 7376
      4134 7380 4132 7395 4137 7423 4155 7420
TIME...MOT...LOC 2150Z 276DEG 18KT 4145 7411 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

FEB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 3:55 PM EDT	Special Weather Statement	OKX	Orange	50 min
Aug 11, 4:13 PM EDT	Severe Thunderstorm Warning	OKX	Orange	47 min
Aug 11, 4:15 PM EDT	Severe Thunderstorm Warning	OKX	Orange, Putnam	45 min
Aug 11, 4:20 PM EDT	Special Weather Statement	OKX	Orange	40 min
Aug 11, 4:45 PM EDT	Excessive Heat Watch	OKX	Bronx, Kings, Nassau, New York, Orange, Putnam and 5 more	23 hr
Aug 11, 5:10 PM EDT	Severe Thunderstorm Warning	OKX	Orange	50 min
Aug 11, 6:01 PM EDT	Special Weather Statement	OKX	Orange	29 min
Aug 11, 6:30 PM EDT	Special Weather Statement	OKX	Putnam	30 min
Aug 11, 7:58 PM EDT	Special Weather Statement	OKX	Rockland, Westchester	32 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Every 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.