Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 99, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Sep 7, 2012, 5:59 PM EDT for 4 counties in Massachusetts. It was in force for 46 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
- Sep 7, 2012, 5:59 PM EDT (21:59 UTC)
- Expired
- Sep 7, 2012, 6:45 PM EDT
- In force
- 46 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Essex County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 50 km from the middle of the area, began a volume at 22:01 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 |
|---|---|---|---|
| Sep 7, 6:14 PM EDT | TSTM WND DMG | Concord, MA | TREES DOWN ON SUDBURY RD. |
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 12:00Z, 10.0 hours before the alert went out and 129 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
- 834 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 508 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
822 WUUS51 KBOX 072159 SVRBOX MAC009-017-021-025-072245- /O.NEW.KBOX.SV.W.0099.120907T2159Z-120907T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TAUNTON MA 559 PM EDT FRI SEP 7 2012 THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME SOUTH CENTRAL ESSEX COUNTY IN EASTERN MASSACHUSETTS... NORTH CENTRAL NORFOLK COUNTY IN EASTERN MASSACHUSETTS... THIS INCLUDES THE CITY OF BROOKLINE... SUFFOLK COUNTY IN EASTERN MASSACHUSETTS... THIS INCLUDES THE CITY OF BOSTON... CENTRAL MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS... THIS INCLUDES THE CITIES OF...WALTHAM...SOMERVILLE...NEWTON... CAMBRIDGE... * UNTIL 645 PM EDT * AT 551 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. TORRENTIAL RAINFALL IS ALSO LIKELY WITH THIS STORM. THIS STORM WAS LOCATED NEAR LINCOLN...OR NEAR WALTHAM...AND WAS MOVING EAST AT 10 MPH. * SOME LOCATIONS IN THE WARNING INCLUDE...BEDFORD...WESTON... LEXINGTON...WELLESLEY...WOBURN...WINCHESTER...WATERTOWN... STONEHAM...SAUGUS...MILTON...MELROSE...MEDFORD...MALDEN... EVERETT...CHELSEA...BELMONT AND ARLINGTON. 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 4247 7098 4223 7108 4235 7146 4252 7139 TIME...MOT...LOC 2158Z 287DEG 8KT 4241 7131 $$ BELK
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 4:39 PM EDT | High Surf Advisory | BOX | Barnstable, Bristol, Dukes, Essex, Nantucket, Norfolk and 1 more | 4 days |
| Sep 7, 4:42 PM EDT | Small Craft Advisory | BOX | 4 days | |
| Sep 7, 5:46 PM EDT | Special Weather Statement | BOX | Middlesex | 59 min |
| Sep 7, 6:14 PM EDT | Special Weather Statement | BOX | Suffolk | 31 min |
| Sep 7, 6:42 PM EDT | Areal Flood Advisory | BOX | Middlesex, Norfolk, Suffolk | 55 min |
| Sep 7, 7:12 PM EDT | Special Weather Statement | BOX | Worcester | 48 min |
| Sep 7, 7:20 PM EDT | Areal Flood Advisory | BOX | Essex, Middlesex, Norfolk, Suffolk | 100 min |
| Sep 7, 7:34 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 26 min |
| Sep 7, 7:53 PM EDT | Special Weather Statement | BOX | Worcester | 52 min |
| Sep 7, 7:57 PM EDT | Areal Flood Advisory | BOX | Franklin, Hampshire, Worcester | 93 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.