Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 15, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 29, 2012, 9:14 PM EDT for Middlesex County, Worcester County, Massachusetts. It was in force for 39 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
- May 29, 2012, 9:14 PM EDT (01:14 UTC)
- Expired
- May 29, 2012, 9:53 PM EDT
- In force
- 39 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Middlesex County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 61 km from the middle of the area, began a volume at 01:13 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 |
|---|---|---|---|
| May 29, 9:28 PM EDT | TSTM WND DMG | Worcester, MA | TREES AND WIRES DOWN ON SUNNY HILL DRIVE |
| May 29, 9:30 PM EDT | HAIL 0.75 | Boylston, MA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Chatham, MA (KCHH), launched 00:00Z, 1.2 hours before the alert went out and 155 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
- 416 J/kg
- Mixed-layer CIN
- -300 J/kg
- Mixed-layer LCL
- 862 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- -42 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
302 WUUS51 KBOX 300114 SVRBOX MAC017-027-300200- /O.NEW.KBOX.SV.W.0015.120530T0114Z-120530T0200Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 914 PM EDT TUE MAY 29 2012 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS... THIS INCLUDES THE CITY OF WORCESTER... CENTRAL MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS... THIS INCLUDES THE CITY OF FRAMINGHAM... * UNTIL 1000 PM EDT * AT 913 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 WEST BOYLSTON...OR 9 MILES NORTH OF WORCESTER...AND WAS MOVING EAST AT 20 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE...STERLING...BOYLSTON... SHREWSBURY...CLINTON...LANCASTER...NORTHBOROUGH...BERLIN... WESTBOROUGH...BOLTON...HARVARD...HUDSON...MARLBOROUGH... SOUTHBOROUGH...STOW...BOXBOROUGH...ACTON...MAYNARD...WAYLAND... SUDBURY...CONCORD AND CARLISLE. 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 4255 7131 4226 7136 4222 7189 4247 7193 TIME...MOT...LOC 0114Z 265DEG 19KT 4239 7177 $$ FRANK
5 follow-up statements
568 WWUS51 KBOX 300118 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 918 PM EDT TUE MAY 29 2012 MAC017-027-300200- /O.CON.KBOX.SV.W.0015.000000T0000Z-120530T0200Z/ MIDDLESEX MA-WORCESTER MA- 918 PM EDT TUE MAY 29 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR CENTRAL WORCESTER AND CENTRAL MIDDLESEX COUNTIES... AT 913 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR WEST BOYLSTON...OR 8 MILES NORTH OF WORCESTER...MOVING EAST AT 20 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHREWSBURY...CLINTON...LANCASTER...NORTHBOROUGH...BERLIN... WESTBOROUGH...BOLTON...HARVARD...HUDSON...MARLBOROUGH... SOUTHBOROUGH...STOW...BOXBOROUGH...ACTON...MAYNARD...FRAMINGHAM... WAYLAND...SUDBURY...CONCORD AND CARLISLE PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4255 7131 4226 7136 4222 7189 4247 7193 TIME...MOT...LOC 0118Z 265DEG 19KT 4239 7174 $$ FRANK
585 WWUS51 KBOX 300125 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 925 PM EDT TUE MAY 29 2012 MAC017-027-300200- /O.CON.KBOX.SV.W.0015.000000T0000Z-120530T0200Z/ MIDDLESEX MA-WORCESTER MA- 925 PM EDT TUE MAY 29 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR EAST CENTRAL WORCESTER AND CENTRAL MIDDLESEX COUNTIES... AT 923 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CLINTON...OR 9 MILES SOUTH OF LEOMINSTER...MOVING EAST AT 20 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LANCASTER...NORTHBOROUGH...BERLIN...WESTBOROUGH...BOLTON...HARVARD... HUDSON...MARLBOROUGH...SOUTHBOROUGH...STOW...BOXBOROUGH...ACTON... MAYNARD...FRAMINGHAM...WAYLAND...SUDBURY...CONCORD AND CARLISLE PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4248 7181 4255 7131 4226 7136 4223 7179 TIME...MOT...LOC 0125Z 265DEG 19KT 4239 7169 $$ FRANK
573 WWUS51 KBOX 300134 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 934 PM EDT TUE MAY 29 2012 MAC017-027-300200- /O.CON.KBOX.SV.W.0015.000000T0000Z-120530T0200Z/ MIDDLESEX MA-WORCESTER MA- 934 PM EDT TUE MAY 29 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR EAST CENTRAL WORCESTER AND CENTRAL MIDDLESEX COUNTIES... AT 932 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR BERLIN...OR 11 MILES SOUTHEAST OF LEOMINSTER...MOVING EAST AT 20 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BOLTON...HARVARD...HUDSON...MARLBOROUGH...SOUTHBOROUGH...STOW... BOXBOROUGH...ACTON...MAYNARD...FRAMINGHAM...WAYLAND...SUDBURY... CONCORD AND CARLISLE PRECAUTIONARY/PREPAREDNESS ACTIONS... AT 928 PM HAM RADIO REPORTED A LARGE TREE WAS DOWN ON POWERLINES ON SUNNY HILL DRIVE IN WORCESTER....SEEK SAFE SHELTER AND STAY AWAY FROM WINDOWS! && LAT...LON 4223 7176 4249 7177 4255 7131 4226 7136 TIME...MOT...LOC 0133Z 265DEG 19KT 4239 7163 $$ FRANK
709 WWUS51 KBOX 300144 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 944 PM EDT TUE MAY 29 2012 MAC017-027-300200- /O.CON.KBOX.SV.W.0015.000000T0000Z-120530T0200Z/ MIDDLESEX MA-WORCESTER MA- 944 PM EDT TUE MAY 29 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR EAST CENTRAL WORCESTER AND CENTRAL MIDDLESEX COUNTIES... AT 941 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR SUDBURY...OR 6 MILES NORTH OF FRAMINGHAM...MOVING EAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WAYLAND...CONCORD AND CARLISLE PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. && LAT...LON 4225 7160 4251 7162 4255 7131 4226 7136 TIME...MOT...LOC 0143Z 263DEG 23KT 4239 7142 $$ FRANK
665 WWUS51 KBOX 300153 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 953 PM EDT TUE MAY 29 2012 MAC017-027-300202- /O.CAN.KBOX.SV.W.0015.000000T0000Z-120530T0200Z/ MIDDLESEX MA-WORCESTER MA- 953 PM EDT TUE MAY 29 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WORCESTER AND CENTRAL MIDDLESEX COUNTIES IS CANCELLED... THE THUNDERSTORM THAT PROMPTED THE WARNING HAS WEAKENED...SO THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED. HOWEVER...IT STILL CONTAINS BRIEF HEAVY RAINFALL...DANGEROUS CLOUD TO GROUND LIGHTNING AND STRONG GUSTY WINDS. LAT...LON 4225 7160 4251 7162 4255 7131 4226 7136 TIME...MOT...LOC 0152Z 265DEG 19KT 4240 7149 $$ FRANK
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 8:23 PM EDT | Special Weather Statement | BOX | Hampden, Worcester | 37 min |
| May 29, 8:48 PM EDT | Special Weather Statement | BOX | Middlesex, Worcester | 42 min |
| May 29, 9:04 PM EDT | Special Weather Statement | BOX | Worcester | 41 min |
| May 29, 9:36 PM EDT | Special Weather Statement | BOX | Norfolk | 39 min |
| May 30, 5:11 PM EDT | Special Weather Statement | BOX | Franklin, Hampden, Hampshire | 49 min |
| May 30, 5:54 PM EDT | Special Weather Statement | BOX | Hampden, Hampshire | 51 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.