Alert archive / New York / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 127, NWS Albany, NY

July 20, 2021Columbia County, Rensselaer County, New York; Berkshire County, Massachusetts

NWS Albany, NY issued this severe thunderstorm warning at Jul 20, 2021, 9:46 PM EDT for Columbia County, Rensselaer County, New York; Berkshire County, Massachusetts. It was in force for 59 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 20, 2021, 9:46 PM EDT (01:46 UTC)
Expired: Jul 20, 2021, 10:45 PM EDT
In force: 59 min
Issued by: NWS Albany, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Berkshire County, MA, Columbia County, NY, Rensselaer County, NY

The radar

The Albany radar (KENX), 77 km from the middle of the area, began a volume at 01:49 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 20, 10:15 PM EDT	TSTM WND DMG	Pittsfield, MA	5 TREES DOWN IN PITTSFIELD ON MOUNTAIN DRIVE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 20, 3:05 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 1.8 hours before the alert went out and 64 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: 1226 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1198 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.6

Open this sounding in Storm Lab

The text

As transmitted.

117 
WUUS51 KALY 210146
SVRALY
MAC003-NYC021-083-210245-
/O.NEW.KALY.SV.W.0127.210721T0146Z-210721T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Albany NY
946 PM EDT Tue Jul 20 2021

The National Weather Service in Albany has issued a

* Severe Thunderstorm Warning for...
  Central Berkshire County in western Massachusetts...
  Northeastern Columbia County in east central New York...
  Southeastern Rensselaer County in east central New York...

* Until 1045 PM EDT.

* At 946 PM EDT, a severe thunderstorm was located over Stephentown,
  or 8 miles northeast of Nassau, moving southeast at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Pittsfield, Nassau, Lee, Lenox, Stephentown, New Lebanon, Becket,
  Hancock, Berkshire, Dalton, Lanesborough, Hinsdale, Richmond, Peru,
  East Nassau, Washington, Barkerville, West Stephentown, Jacks
  Corners and Taborton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

Please report hail size...damaging winds and reports of trees down to
the National Weather Service by email at Alb.Stormreport@noaa.gov...
On Facebook at www.facebook.com/nwsalbany or twitter @nwsalbany

LAT...LON 4238 7301 4239 7307 4233 7306 4232 7304
      4223 7312 4251 7361 4269 7347 4247 7298
TIME...MOT...LOC 0146Z 305DEG 25KT 4258 7346 

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

Rathbun

2 follow-up statements

486 
WWUS51 KALY 210221
SVSALY

Severe Weather Statement
National Weather Service Albany NY
1021 PM EDT Tue Jul 20 2021

NYC021-083-210230-
/O.CAN.KALY.SV.W.0127.000000T0000Z-210721T0245Z/
Columbia NY-Rensselaer NY-
1021 PM EDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN COLUMBIA AND
SOUTHEASTERN RENSSELAER COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
western Massachusetts.

LAT...LON 4238 7301 4239 7307 4233 7306 4232 7304
      4223 7312 4237 7336 4258 7329 4247 7298
TIME...MOT...LOC 0220Z 286DEG 36KT 4244 7315 

$$

MAC003-210245-
/O.CON.KALY.SV.W.0127.000000T0000Z-210721T0245Z/
Berkshire MA-
1021 PM EDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT
FOR CENTRAL BERKSHIRE COUNTY...

At 1020 PM EDT, a severe thunderstorm was located near Pittsfield,
moving east at 40 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Pittsfield, Lee, Lenox, Becket, Berkshire, Dalton, Lanesborough,
Hinsdale, Peru, Washington, Barkerville, Tanglewood, New Lenox,
Lakeview Terrace, Lenox Dale, The Boulders, The Center At Lenox,
Adams Junction, Yankee Orchards and Stearnsville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4238 7301 4239 7307 4233 7306 4232 7304
      4223 7312 4237 7336 4258 7329 4247 7298
TIME...MOT...LOC 0220Z 286DEG 36KT 4244 7315 

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

Rathbun

637 
WWUS51 KALY 210243
SVSALY

Severe Weather Statement
National Weather Service Albany NY
1043 PM EDT Tue Jul 20 2021

MAC003-210252-
/O.EXP.KALY.SV.W.0127.000000T0000Z-210721T0245Z/
Berkshire MA-
1043 PM EDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BERKSHIRE COUNTY WILL
EXPIRE AT 1045 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
western Massachusetts.

LAT...LON 4238 7301 4239 7307 4233 7306 4232 7304
      4223 7312 4237 7336 4258 7329 4247 7298
TIME...MOT...LOC 0242Z 305DEG 25KT 4236 7299 

$$

Rathbun

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 8:11 PM EDT	Areal Flood Advisory	ALY	Fulton, Saratoga, Schenectady, Warren, Washington	3 hr
Jul 20, 8:12 PM EDT	Special Weather Statement	ALY	Montgomery	33 min
Jul 20, 8:17 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Montgomery, Saratoga, Schenectady	43 min
Jul 20, 8:24 PM EDT	Special Weather Statement	ALY	Saratoga, Washington	36 min
Jul 20, 8:31 PM EDT	Severe Thunderstorm Warning	ALY	Fulton, Saratoga, Warren, Washington	59 min
Jul 20, 8:39 PM EDT	Areal Flood Advisory	ALY	Montgomery, Schenectady, Schoharie	3 hr
Jul 20, 8:40 PM EDT	Severe Thunderstorm Warning	ALY	Montgomery, Schenectady, Schoharie	50 min
Jul 20, 8:49 PM EDT	Areal Flood Advisory	ALY	Rensselaer, Saratoga, Schenectady, Washington	3 hr
Jul 20, 8:54 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Saratoga, Washington	36 min
Jul 20, 9:06 PM EDT	Special Weather Statement	ALY	Albany	39 min
Jul 20, 9:12 PM EDT	Special Weather Statement	ALY	Rensselaer	33 min
Jul 20, 9:24 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer, Washington	51 min
Jul 20, 9:31 PM EDT	Special Weather Statement	ALY	Columbia, Greene	44 min
Jul 20, 9:38 PM EDT	Severe Thunderstorm Warning	ALY	Rensselaer	52 min
Jul 20, 10:40 PM EDT	Special Weather Statement	ALY	Ulster	50 min
Jul 20, 11:33 PM EDT	Special Weather Statement	ALY	Dutchess	42 min
Jul 20, 11:45 PM EDT	Areal Flood Advisory	ALY	Montgomery, Schenectady, Schoharie	2 hr
Jul 20, 10:50 PM EDT	Special Weather Statement	ALY	Berkshire	40 min

Nearby

Severe Thunderstorm Warnings in New York, 2021 Severe Thunderstorm Warnings in Massachusetts, 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.