Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 96, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 17, 2012, 8:37 PM EDT for Middlesex County, Worcester County, Massachusetts; Hillsborough County, New Hampshire. It was in force for 34 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 17, 2012, 8:37 PM EDT (00:37 UTC)
- Expired
- Aug 17, 2012, 9:11 PM EDT
- In force
- 34 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Middlesex County, MA, Worcester County, MA, Hillsborough County, NH
The radar
The Boston radar (KBOX), 98 km from the middle of the area, began a volume at 00:38 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 00:00Z, 0.6 hours before the alert went out and 167 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1120 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -66 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
411 WUUS51 KBOX 180037 SVRBOX MAC017-027-NHC011-180130- /O.NEW.KBOX.SV.W.0096.120818T0037Z-120818T0130Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 837 PM EDT FRI AUG 17 2012 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTH CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... NORTHWESTERN MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS... SOUTH CENTRAL HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE... * UNTIL 930 PM EDT * AT 834 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR GARDNER AND WAS MOVING NORTHEAST AT 30 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE...ASHBURNHAM...ASHBY... MASON...TOWNSEND...BROOKLINE...PEPPERELL AND HOLLIS. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW... INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID FLOODED ROADS. && LAT...LON 4282 7162 4264 7151 4256 7208 4263 7211 TIME...MOT...LOC 0037Z 250DEG 27KT 4261 7205 $$ JWD
2 follow-up statements
667 WWUS51 KBOX 180056 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 856 PM EDT FRI AUG 17 2012 MAC017-027-NHC011-180130- /O.CON.KBOX.SV.W.0096.000000T0000Z-120818T0130Z/ MIDDLESEX MA-WORCESTER MA-HILLSBOROUGH NH- 856 PM EDT FRI AUG 17 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR SOUTH CENTRAL HILLSBOROUGH...NORTH CENTRAL WORCESTER AND NORTHWESTERN MIDDLESEX COUNTIES... AT 855 PM EDT...THE SEVERE THUNDERSTORM WAS LOCATED NEAR ASHBURNHAM AND WAS MOVING EAST AT 30 MPH. THIS STORM IS CAPABLE OF PRODUCING 60 MPH WIND GUSTS AND QUARTER SIZED HAIL. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ASHBY...MASON...TOWNSEND...BROOKLINE...PEPPERELL AND HOLLIS PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4282 7162 4264 7151 4256 7208 4263 7211 TIME...MOT...LOC 0055Z 250DEG 27KT 4266 7188 $$ JWD
222 WWUS51 KBOX 180111 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 911 PM EDT FRI AUG 17 2012 MAC017-027-NHC011-180121- /O.CAN.KBOX.SV.W.0096.000000T0000Z-120818T0130Z/ MIDDLESEX MA-WORCESTER MA-HILLSBOROUGH NH- 911 PM EDT FRI AUG 17 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL HILLSBOROUGH... NORTH CENTRAL WORCESTER AND NORTHWESTERN MIDDLESEX COUNTIES IS CANCELLED... THE THUNDERSTORM HAS WEAKENED AND IS NO LONGER CAPABLE OF PRODUCING DAMAGING WINDS OR LARGE HAIL. && LAT...LON 4282 7162 4264 7151 4256 7208 4263 7211 TIME...MOT...LOC 0111Z 250DEG 27KT 4270 7173 $$ JWD
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 8:04 PM EDT | Special Weather Statement | BOX | Hampden | 56 min |
| Aug 17, 8:35 PM EDT | Special Weather Statement | BOX | Middlesex, Worcester | 55 min |
| Aug 17, 9:24 PM EDT | Special Weather Statement | BOX | Suffolk | 36 min |
| Aug 17, 11:22 PM EDT | Special Weather Statement | BOX | Norfolk | 23 min |
| Aug 18, 3:34 AM EDT | Special Marine Warning | BOX | 56 min | |
| Aug 18, 4:47 AM EDT | Severe Thunderstorm Warning | BOX | Barnstable, Bristol, Plymouth | 58 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2012Severe Thunderstorm Warnings in New Hampshire, 2012Every severe thunderstorm warning in 2012
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.