Alert archive / Massachusetts / Tornado Warnings in 2020

Tornado Warning 2, NWS Boston/Norton, MA

August 2, 2020Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Aug 2, 2020, 7:28 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 32 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 2, 2020, 7:28 PM EDT (23:28 UTC)
Expired
Aug 2, 2020, 8:00 PM EDT
In force
32 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Tornado
Observed
Hail
0.75 in

Counties Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 105 km from the middle of the area, began a volume at 23:30 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

TimeReportWhereRemark
Aug 2, 7:47 PM EDTTSTM WND DMGBlandford, MATREE DOWN ON BEECH HILL ROAD, WIRES DOWN.
Aug 2, 8:09 PM EDTTSTM WND DMGBlandford, MAPOWER POLE SNAPPED WITH TREES AND WIRES DOWN ON EAST OTIS ROAD.

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.

IssuedProductOfficeLasted
Aug 2, 3:10 PM EDTTornado WatchSPC7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 11.5 hours before the alert went out and 94 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 2020-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 60 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 2020-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 102 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
60 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
925 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
102 m²/s²
0-3 km storm-relative helicity
206 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

251 
WFUS51 KBOX 022328
TORBOX
MAC013-015-030000-
/O.NEW.KBOX.TO.W.0002.200802T2328Z-200803T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Boston/Norton MA
728 PM EDT Sun Aug 2 2020

The National Weather Service in Boston/Norton has issued a

* Tornado Warning for...
  Southwestern Hampshire County in western Massachusetts...
  Northwestern Hampden County in western Massachusetts...

* Until 800 PM EDT.
    
* At 726 PM EDT, a tornado producing storm was located over
  Blandford, or 8 miles northwest of Westfield, moving northeast at
  25 mph.

  HAZARD...Damaging tornado.

  SOURCE...Radar confirmed tornado. In addition, law enforcement in 
           Sandisfield reported a tornado producing damage on South 
           Main Street in Sandisfield.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This tornadic storm will be near...
  Montgomery around 740 PM EDT.
  Southampton, Huntington and Westhampton around 750 PM EDT.
  Easthampton around 755 PM EDT.
  Northampton and South Hadley around 800 PM EDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

&&

LAT...LON 4224 7301 4242 7271 4227 7256 4206 7292
      4216 7303
TIME...MOT...LOC 2326Z 229DEG 24KT 4219 7291 

TORNADO...OBSERVED
HAIL...<.75IN

$$

Loconto
2 follow-up statements
911 
WWUS51 KBOX 022344
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
744 PM EDT Sun Aug 2 2020

MAC013-015-030000-
/O.CON.KBOX.TO.W.0002.000000T0000Z-200803T0000Z/
Hampshire MA-Hampden MA-
744 PM EDT Sun Aug 2 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM EDT FOR
SOUTHWESTERN HAMPSHIRE AND NORTHWESTERN HAMPDEN COUNTIES...
    
At 743 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Montgomery, or 7 miles north of Westfield, moving
northeast at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation. This storm has a history of 
         producing tree damage in Tolland as well as damage in 
         Sandisfield in Berkshire County, Massachusetts.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Northampton, Easthampton, Southampton, Hadley, Williamsburg,
Huntington, Russell, Westhampton, Chester, Blandford, Chesterfield
and Montgomery.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4217 7285 4226 7296 4229 7292 4242 7271
      4230 7259
TIME...MOT...LOC 2343Z 229DEG 22KT 4225 7281 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

Loconto
960 
WWUS51 KBOX 022356
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
756 PM EDT Sun Aug 2 2020

MAC013-015-030005-
/O.EXP.KBOX.TO.W.0002.000000T0000Z-200803T0000Z/
Hampshire MA-Hampden MA-
756 PM EDT Sun Aug 2 2020

...THE TORNADO WARNING FOR SOUTHWESTERN HAMPSHIRE AND NORTHWESTERN
HAMPDEN COUNTIES WILL EXPIRE AT 800 PM EDT...
    
The tornado threat has diminished to weak and broad rotation and the 
Tornado Warning will be allowed to expire. However, damaging winds 
remain likely and a Severe Thunderstorm Warning remains in effect 
for the area.

A Tornado Watch remains in effect until 1000 PM EDT for western
Massachusetts.

LAT...LON 4217 7285 4226 7296 4229 7292 4242 7271
      4230 7259
TIME...MOT...LOC 2355Z 229DEG 24KT 4227 7278 

$$

Loconto

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 2, 1:36 PM EDTSpecial Weather StatementBOXHampden39 min
Aug 2, 2:17 PM EDTSevere Thunderstorm WarningBOXHampden58 min
Aug 2, 4:38 PM EDTSpecial Weather StatementBOXMiddlesex52 min
Aug 2, 5:30 PM EDTSpecial Weather StatementBOXMiddlesex, Norfolk45 min
Aug 2, 6:46 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire59 min
Aug 2, 6:55 PM EDTTornado WarningBOXHampden, Hampshire35 min
Aug 2, 7:54 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire39 min

Nearby

Tornado Warnings in Massachusetts, 2020Every tornado warning in 2020Tornadoes in 2020

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.