Alert archive / Massachusetts / Tornado Warnings in 2010

Tornado Warning 3, NWS Boston/Norton, MA

July 19, 2010Worcester County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Jul 19, 2010, 7:07 PM EDT for Worcester County, Massachusetts. It was in force for 38 min. 3 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
Jul 19, 2010, 7:07 PM EDT (23:07 UTC)
Expired
Jul 19, 2010, 7:45 PM EDT
In force
38 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon

County Worcester County, MA

The radar

The Boston radar (KBOX), 93 km from the middle of the area, began a volume at 23:10 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
Jul 19, 7:36 PM EDTTSTM WND DMGWestminster, MAWIRES DOWN ON WYMAN ROAD WITH POWER OUTAGES.
Jul 19, 7:51 PM EDTHAIL 1.75Leominster, MAGOLF BALL SIZED HAIL.
Jul 19, 7:52 PM EDTTSTM WND DMGFitchburg, MAWIRES DOWN ON MOUNT ELAF ROAD.

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 12:00Z, 11.1 hours before the alert went out and 159 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 2010-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2010-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1527 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

422 
WFUS51 KBOX 192307
TORBOX
MAC027-192345-
/O.NEW.KBOX.TO.W.0003.100719T2307Z-100719T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
707 PM EDT MON JUL 19 2010

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...
  THIS INCLUDES THE CITIES OF...LEOMINSTER...FITCHBURG...

* UNTIL 745 PM EDT

* AT 705 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES
  NORTHWEST OF GARDNER...OR 12 MILES SOUTH OF JAFFREY...MOVING
  SOUTHEAST AT 25 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WESTMINSTER.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS A
TORNADO MAY ALREADY BE ON THE GROUND OR IS EXPECTED TO DEVELOP
SHORTLY. TAKE COVER NOW! MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE
OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4256 7169 4244 7185 4263 7216 4269 7208
TIME...MOT...LOC 2307Z 302DEG 22KT 4264 7207

$$
EKSTER
2 follow-up statements
947 
WWUS51 KBOX 192319
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
719 PM EDT MON JUL 19 2010

MAC027-192345-
/O.CON.KBOX.TO.W.0003.000000T0000Z-100719T2345Z/
WORCESTER MA-
719 PM EDT MON JUL 19 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR NORTH
CENTRAL WORCESTER COUNTY...

AT 714 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR GARDNER...OR 12
MILES WEST OF FITCHBURG...MOVING SOUTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WESTMINSTER...PRINCETON AND LEOMINSTER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 4253 7174 4244 7185 4262 7212 4267 7202
TIME...MOT...LOC 2319Z 307DEG 22KT 4259 7201

$$
MEKSTER
523 
WWUS51 KBOX 192333
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
733 PM EDT MON JUL 19 2010

MAC027-192345-
/O.CON.KBOX.TO.W.0003.000000T0000Z-100719T2345Z/
WORCESTER MA-
733 PM EDT MON JUL 19 2010

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR NORTH
CENTRAL WORCESTER COUNTY...

AT 732 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR WESTMINSTER...OR 6
MILES WEST OF FITCHBURG...MOVING SOUTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
LEOMINSTER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

&&

LAT...LON 4258 7205 4262 7194 4253 7174 4244 7185
TIME...MOT...LOC 2333Z 304DEG 23KT 4256 7193

$$
MLE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 19, 3:52 AM EDTSmall Craft Advisory for Hazardous SeasBOX49 hr
Jul 19, 10:50 AM EDTSpecial Marine WarningBOX55 min
Jul 19, 11:25 AM EDTSevere Thunderstorm WarningBOXBristol47 min
Jul 19, 11:43 AM EDTSpecial Marine WarningBOX62 min
Jul 19, 11:57 AM EDTSpecial Weather StatementBOXBristol63 min
Jul 19, 12:27 PM EDTSpecial Marine WarningBOX63 min
Jul 19, 1:12 PM EDTSpecial Weather StatementBOXBarnstable48 min
Jul 19, 1:24 PM EDTSpecial Marine WarningBOX66 min
Jul 19, 2:25 PM EDTSpecial Marine WarningBOX65 min
Jul 19, 6:35 PM EDTSpecial Weather StatementBOXFranklin25 min
Jul 19, 6:47 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester43 min
Jul 19, 7:26 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester49 min
Jul 19, 7:43 PM EDTTornado WarningBOXWorcester47 min

Nearby

Tornado Warnings in Massachusetts, 2010Every tornado warning in 2010Tornadoes in 2010

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.