Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 63, NWS New York, NY

August 11, 2021Orange County, New York

NWS New York, NY issued this severe thunderstorm warning at Aug 11, 2021, 5:10 PM EDT for Orange County, New York. It was in force for 50 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
Aug 11, 2021, 5:10 PM EDT (21:10 UTC)
Expired
Aug 11, 2021, 6:00 PM EDT
In force
50 min
Issued by
NWS New York, NY
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Orange County, NY

The radar

The Albany radar (KENX), 118 km from the middle of the area, began a volume at 21:13 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 nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.2 hours before the alert went out and 134 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, Albany, NY at 12:00Z on 2021-08-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 112 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, Albany, NY at 12:00Z on 2021-08-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 230 square meters per square second.1939Sfc1 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
112 J/kg
Mixed-layer CIN
-115 J/kg
Mixed-layer LCL
839 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
230 m²/s²
0-3 km storm-relative helicity
261 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

The text

As transmitted.

588 
WUUS51 KOKX 112110
SVROKX
NYC071-112200-
/O.NEW.KOKX.SV.W.0063.210811T2110Z-210811T2200Z/

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

The National Weather Service in Upton NY has issued a

* Severe Thunderstorm Warning for...
  Northern Orange County in southeastern New York...

* Until 600 PM EDT.

* At 510 PM EDT, a severe thunderstorm was located near Middletown,
  moving east at 10 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...
  Goshen around 530 PM EDT.
  Montgomery around 550 PM EDT.
  Walden around 600 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4150 7448 4155 7444 4158 7439 4163 7425
      4160 7425 4158 7413 4161 7413 4160 7406
      4143 7399 4138 7450 4149 7470
TIME...MOT...LOC 2110Z 276DEG 11KT 4149 7439 

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

$$

JE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 3:55 PM EDTSpecial Weather StatementOKXOrange50 min
Aug 11, 4:13 PM EDTSevere Thunderstorm WarningOKXOrange47 min
Aug 11, 4:15 PM EDTSevere Thunderstorm WarningOKXOrange, Putnam45 min
Aug 11, 4:20 PM EDTSpecial Weather StatementOKXOrange40 min
Aug 11, 4:45 PM EDTExcessive Heat WatchOKXBronx, Kings, Nassau, New York, Orange, Putnam and 5 more23 hr
Aug 11, 5:51 PM EDTSevere Thunderstorm WarningOKXOrange, Putnam39 min
Aug 11, 6:01 PM EDTSpecial Weather StatementOKXOrange29 min
Aug 11, 6:30 PM EDTSpecial Weather StatementOKXPutnam30 min
Aug 11, 7:58 PM EDTSpecial Weather StatementOKXRockland, Westchester32 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.