Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 119, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Oct 30, 2012, 8:19 PM EDT for 5 counties in Massachusetts. It was in force for 41 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
- Oct 30, 2012, 8:19 PM EDT (00:19 UTC)
- Expired
- Oct 30, 2012, 9:00 PM EDT
- In force
- 41 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
Counties Essex County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA
The radar
The Boston radar (KBOX), 65 km from the middle of the area, began a volume at 00:22 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 |
|---|---|---|---|
| Oct 30, 8:30 PM EDT | HAIL 1 | Melrose, MA | FELL ON HANCOCK STREET |
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, 0.3 hours before the alert went out and 122 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
- 333 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 848 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.5
The text
As transmitted, in the capitals the NWS used until 2016.
115
WUUS51 KBOX 310019
SVRBOX
MAC009-017-021-023-025-310100-
/O.NEW.KBOX.SV.W.0119.121031T0019Z-121031T0100Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
819 PM EDT TUE OCT 30 2012
THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
ESSEX COUNTY IN EASTERN MASSACHUSETTS...
THIS INCLUDES THE CITIES OF...NEWBURYPORT...LYNN...BEVERLY...
NORTHEASTERN NORFOLK COUNTY IN EASTERN MASSACHUSETTS...
THIS INCLUDES THE CITY OF BROOKLINE...
SUFFOLK COUNTY IN EASTERN MASSACHUSETTS...
THIS INCLUDES THE CITY OF BOSTON...
EAST CENTRAL MIDDLESEX COUNTY IN SOUTHEAST MASSACHUSETTS...
THIS INCLUDES THE CITIES OF...SOMERVILLE...CAMBRIDGE...
EXTREME NORTHWESTERN PLYMOUTH COUNTY IN SOUTHEAST MASSACHUSETTS...
* UNTIL 900 PM EDT
* AT 817 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 BOSTON...AND WAS MOVING
NORTH AT 55 MPH.
* SOME LOCATIONS IN THE WARNING INCLUDE...EVERETT...MEDFORD...
REVERE...NAHANT...MALDEN...MELROSE...STONEHAM...SAUGUS...
SWAMPSCOTT...MARBLEHEAD...WAKEFIELD...READING...LYNNFIELD...
PEABODY...SALEM...NORTH READING...DANVERS...MIDDLETON...WENHAM...
HAMILTON...TOPSFIELD...BOXFORD...IPSWICH...ROWLEY...GEORGETOWN...
GROVELAND...HAVERHILL...NEWBURY...WEST NEWBURY...MERRIMAC...
SALISBURY AND AMESBURY.
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 4287 7082 4269 7076 4255 7081 4254 7086
4247 7083 4249 7085 4245 7093 4242 7090
4241 7093 4242 7094 4245 7095 4241 7098
4235 7094 4233 7101 4235 7089 4229 7090
4229 7115 4281 7109 4289 7092
TIME...MOT...LOC 0020Z 187DEG 48KT 4238 7101
$$
KJC1 follow-up statement
758
WWUS51 KBOX 310040
SVSBOX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
840 PM EDT TUE OCT 30 2012
MAC021-023-025-310050-
/O.CAN.KBOX.SV.W.0119.000000T0000Z-121031T0100Z/
NORFOLK MA-PLYMOUTH MA-SUFFOLK MA-
840 PM EDT TUE OCT 30 2012
...THE SEVERE THUNDERSTORM WARNING FOR SUFFOLK...EXTREME NORTHWESTERN
PLYMOUTH AND EXTREME NORTH CENTRAL NORFOLK COUNTIES IS CANCELLED...
LAT...LON 4287 7082 4269 7076 4259 7080 4259 7093
4258 7112 4281 7109 4289 7092
TIME...MOT...LOC 0040Z 187DEG 48KT 4265 7097
$$
MAC009-017-310100-
/O.CON.KBOX.SV.W.0119.000000T0000Z-121031T0100Z/
MIDDLESEX MA-ESSEX MA-
840 PM EDT TUE OCT 30 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CENTRAL ESSEX AND EXTREME EAST CENTRAL MIDDLESEX COUNTIES...
AT 839 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 TOPSFIELD...OR 8 MILES
NORTHWEST OF BEVERLY...MOVING NORTH AT 55 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
BOXFORD...IPSWICH...ROWLEY...GEORGETOWN...GROVELAND...HAVERHILL...
NEWBURY...WEST NEWBURY...NEWBURYPORT...MERRIMAC...SALISBURY AND
AMESBURY
LAT...LON 4287 7082 4269 7076 4259 7080 4259 7093
4258 7112 4281 7109 4289 7092
TIME...MOT...LOC 0040Z 187DEG 48KT 4265 7097
$$
KJCThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 30, 8:02 PM EDT | Areal Flood Advisory | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk | 83 min |
| Oct 30, 8:40 PM EDT | Special Marine Warning | BOX | 35 min | |
| Oct 31, 2:03 AM EDT | Areal Flood Advisory | BOX | Bristol, Plymouth | 2 hr |
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.