Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 25, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 23, 2012, 4:56 PM EDT for Middlesex County, Norfolk County, Suffolk County, Massachusetts. It was in force for 49 min. 5 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
- Jun 23, 2012, 4:56 PM EDT (20:56 UTC)
- Expired
- Jun 23, 2012, 5:45 PM EDT
- In force
- 49 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Middlesex County, MA, Norfolk County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 33 km from the middle of the area, began a volume at 20:57 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 |
|---|---|---|---|
| Jun 23, 5:11 PM EDT | TSTM WND DMG | Needham, MA | LARGE BRANCHES DOWN ON NOHATON AND HARRIS STREETS |
| Jun 23, 5:11 PM EDT | TSTM WND DMG | Westwood, MA | ELECTRICAL LINES DOWN ON CHURCH STREET |
| Jun 23, 5:11 PM EDT | HAIL 0.88 | Needham, MA | |
| Jun 23, 5:19 PM EDT | MARINE TSTM WIND 42 | 1 W Boston, MA | AT THE LONGFELLOW BRIDGE |
| Jun 23, 5:25 PM EDT | TSTM WND DMG | Brookline, MA | TENTS AT AMATEUR RADIO FIELD DAY SITE BLOWN OVER. SEVERAL TREES DOWN |
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, 8.9 hours before the alert went out and 120 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
- 365 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 949 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
625
WUUS51 KBOX 232056
SVRBOX
MAC017-021-025-232145-
/O.NEW.KBOX.SV.W.0025.120623T2056Z-120623T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
456 PM EDT SAT JUN 23 2012
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
CENTRAL NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
SOUTHWESTERN SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
SOUTH CENTRAL MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS...
* UNTIL 545 PM EDT
* AT 452 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
OF 60 MPH. THIS STORM WAS LOCATED NEAR DOVER...OR 8 MILES
SOUTHEAST OF FRAMINGHAM...AND WAS MOVING EAST AT 15 MPH.
* SOME LOCATIONS IN THE WARNING INCLUDE...WELLESLEY...NEEDHAM...
WESTWOOD...NORWOOD...DEDHAM...CANTON AND MILTON.
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 4232 7105 4214 7112 4216 7131 4220 7137
4233 7133
TIME...MOT...LOC 2057Z 269DEG 13KT 4223 7130
$$
SIPPRELL1 follow-up statement
013 WWUS51 KBOX 232124 SVSBOX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 524 PM EDT SAT JUN 23 2012 MAC017-021-025-232145- /O.CON.KBOX.SV.W.0025.000000T0000Z-120623T2145Z/ MIDDLESEX MA-NORFOLK MA-SUFFOLK MA- 524 PM EDT SAT JUN 23 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT FOR SOUTHWESTERN SUFFOLK...CENTRAL NORFOLK AND SOUTHEASTERN MIDDLESEX COUNTIES... AT 523 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR DEDHAM...OR 7 MILES SOUTH OF BROOKLINE...MOVING EAST AT 15 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CANTON...ROSLINDALE...HYDE PARK...FOREST HILLS...JAMAICA PLAIN... MATTAPAN...MILTON...DORCHESTER AND BOSTON PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. && LAT...LON 4222 7124 4232 7121 4232 7105 4214 7112 TIME...MOT...LOC 2124Z 269DEG 13KT 4223 7117 $$ SIPPRELL
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 3:22 PM EDT | Special Weather Statement | BOX | Franklin | 38 min |
| Jun 23, 3:52 PM EDT | Special Weather Statement | BOX | Franklin | 38 min |
| Jun 23, 4:23 PM EDT | Special Weather Statement | BOX | Essex | 52 min |
| Jun 23, 4:30 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 35 min |
| Jun 23, 4:42 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Suffolk | 48 min |
| Jun 23, 4:57 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 33 min |
| Jun 23, 5:01 PM EDT | Special Marine Warning | BOX | 89 min | |
| Jun 23, 5:09 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Suffolk | 36 min |
| Jun 23, 5:19 PM EDT | Areal Flood Advisory | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk | 4 hr |
| Jun 23, 5:22 PM EDT | Severe Thunderstorm Warning | BOX | Norfolk, Plymouth, Suffolk | 53 min |
| Jun 23, 5:26 PM EDT | Severe Thunderstorm Warning | BOX | Bristol | 35 min |
| Jun 23, 5:27 PM EDT | Special Marine Warning | BOX | 33 min | |
| Jun 23, 5:52 PM EDT | Special Marine Warning | BOX | 30 min | |
| Jun 23, 5:55 PM EDT | Special Marine Warning | BOX | 65 min | |
| Jun 23, 6:06 PM EDT | Severe Thunderstorm Warning | BOX | Norfolk, Plymouth | 39 min |
| Jun 23, 6:10 PM EDT | Severe Thunderstorm Warning | BOX | Bristol | 31 min |
| Jun 23, 6:11 PM EDT | Special Marine Warning | BOX | 26 min | |
| Jun 23, 6:29 PM EDT | Special Weather Statement | BOX | Bristol, Plymouth | 46 min |
| Jun 23, 6:35 PM EDT | Special Marine Warning | BOX | 55 min | |
| Jun 23, 6:45 PM EDT | Special Weather Statement | BOX | Barnstable, Dukes | 90 min |
| Jun 23, 7:26 PM EDT | Special Marine Warning | BOX | 40 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.