Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 137, NWS Albany, NY

July 29, 2021Berkshire County, Massachusetts; Rensselaer County, New York

NWS Albany, NY issued this severe thunderstorm warning at Jul 29, 2021, 9:10 PM EDT for Berkshire County, Massachusetts; Rensselaer County, New York. It was in force for 45 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 29, 2021, 9:10 PM EDT (01:10 UTC)
Expired: Jul 29, 2021, 9:55 PM EDT
In force: 45 min
Issued by: NWS Albany, NY
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Berkshire County, MA, Rensselaer County, NY

The radar

The Albany radar (KENX), 82 km from the middle of the area, began a volume at 01:09 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 29, 9:25 PM EDT	TSTM WND DMG	Cheshire, MA	TREES AND WIRES DOWN. TIME ESTIMATED BY RADAR.

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

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 1.2 hours before the alert went out and 63 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: 172 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 842 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 494 m²/s²
0-3 km storm-relative helicity: 635 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 8.8

Open this sounding in Storm Lab

The text

As transmitted.

853 
WUUS51 KALY 300110
SVRALY
MAC003-NYC083-300215-
/O.NEW.KALY.SV.W.0137.210730T0110Z-210730T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Albany NY
910 PM EDT Thu Jul 29 2021

The National Weather Service in Albany has issued a

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

* Until 1015 PM EDT.

* At 910 PM EDT, a severe thunderstorm was located over North Adams,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  North Adams, Adams, Williamstown, Cheshire, Stephentown, Berlin,
  Florida, Hancock, Savoy, New Ashford, Berkshire, Lanesborough,
  Windsor, East Nassau, Hairpin Turn, Greylock, Soldiers Memorial
  Field, West Stephentown, North Hancock and Cheshire Harbor.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

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 4255 7298 4253 7297 4246 7299 4255 7365
      4276 7328 4275 7328 4274 7303 4270 7302
      4270 7295 4269 7295 4269 7298 4267 7300
      4266 7298 4267 7296 4264 7295
TIME...MOT...LOC 0110Z 281DEG 37KT 4268 7316 

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

MSE

1 follow-up statement

228 
WWUS51 KALY 300155
SVSALY

Severe Weather Statement
National Weather Service Albany NY
955 PM EDT Thu Jul 29 2021

MAC003-NYC083-300205-
/O.CAN.KALY.SV.W.0137.000000T0000Z-210730T0215Z/
Berkshire MA-Rensselaer NY-
955 PM EDT Thu Jul 29 2021

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

LAT...LON 4255 7298 4253 7297 4246 7299 4255 7365
      4276 7328 4275 7328 4274 7303 4270 7302
      4270 7295 4269 7295 4269 7298 4267 7300
      4266 7298 4267 7296 4264 7295
TIME...MOT...LOC 0152Z 281DEG 37KT 4259 7254 

$$

MSE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:03 PM EDT	Severe Thunderstorm Warning	ALY	Berkshire	57 min
Jul 29, 9:07 PM EDT	Special Weather Statement	ALY	Berkshire	23 min
Jul 29, 10:16 PM EDT	Special Weather Statement	ALY	Berkshire	44 min
Jul 29, 11:02 PM EDT	Special Weather Statement	ALY	Berkshire	43 min
Jul 29, 11:13 PM EDT	Areal Flood Advisory	ALY	Berkshire	90 min
Jul 29, 8:48 PM EDT	Flash Flood Warning	ALY	Rensselaer, Washington	117 min
Jul 30, 12:42 AM EDT	River Flood Warning	ALY	Washington	4 hr
Jul 30, 3:49 AM EDT	Special Weather Statement	ALY	Hamilton, Herkimer	41 min
Jul 30, 4:35 AM EDT	Special Weather Statement	ALY	Hamilton, Herkimer	40 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2021 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.