Alert archive / Massachusetts / Special Weather Statements in 2016

Special Weather Statement, NWS Boston/Norton, MA

July 18, 2016Essex County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jul 18, 2016, 3:08 PM EDT for Essex County, Massachusetts. It was in force for 37 min. 12 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: Jul 18, 2016, 3:08 PM EDT (19:08 UTC)
Expired: Jul 18, 2016, 3:45 PM EDT
In force: 37 min
Issued by: NWS Boston/Norton, MA

County Essex County, MA

The radar

The Boston radar (KBOX), 95 km from the middle of the area, began a volume at 19:11 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
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	MERRIMACK VALLEY REGIONAL TRANSPORTATION AUTHORITY...MVRTA...BUS HAS WIRES ON IT.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	NORTH AVENUE AND GILE STREET BOTH CLOSED DUE TO DOWNED TREES.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	TREE DOWN IN ROAD BLOCKING WOODMAN AVENUE. TREE ON HOUSE ON WOODMAN AVENUE. WIRES IN ROAD ON CAROL AVENUE.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	TREE ON BUILDING ON NORTH AVENUE.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	TREES AND WIRES DOWN ON CORLISS HILL ROAD.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	VERY LARGE TREE ON TRAFFIC LIGHT AT GROVELAND AND WATER STREETS.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	WIRES DOWN AND ARCING ON BRANDY BROW ROAD.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	WIRES DOWN AND ARCING ON NORTH BROADWAY.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	WIRES DOWN AND TRANSFORMER ON FIRE ON CORLISS HILL ROAD.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	WIRES DOWN ON LIBERTY STREET AT BROADWAY. TREE AND WIRES DOWN ON MERRILL AVENUE. TREE ON HOUSE ON MAIN STREET.
Jul 18, 3:25 PM EDT	TSTM WND DMG	Haverhill, MA	WIRES DOWN ON ROSEMONT STREET...WARD HILL AVENUE...AND RIVERDALE TERRACE.
Jul 18, 3:42 PM EDT	TSTM WND DMG	Haverhill, MA	TREE DOWN IN ROAD BLOCKING WOODMAN AVENUE. TREE ON HOUSE ON WOODMAN AVENUE. WIRES IN ROAD ON CAROL AVENUE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.1 hours before the alert went out and 134 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 24 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1173 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 219 m²/s²
0-3 km storm-relative helicity: 216 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

939 
WWUS81 KBOX 181908
SPSBOX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
308 PM EDT MON JUL 18 2016
 
MAZ006-007-181945-
EASTERN ESSEX MA-WESTERN ESSEX MA-
308 PM EDT MON JUL 18 2016

...STRONG THUNDERSTORM MOVING INTO NORTHERN ESSEX COUNTY...

AT 308 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
METHUEN...MOVING EAST AT 50 MPH.

WINDS IN EXCESS OF 40 MPH ARE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LAWRENCE...HAVERHILL...METHUEN...ANDOVER...NORTH ANDOVER...
NEWBURYPORT...AMESBURY...SALISBURY...GEORGETOWN...BOXFORD...
NEWBURY...GROVELAND...MERRIMAC...WEST NEWBURY AND SOUTH HAMPTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GET INDOORS WHEN THIS STORM APPROACHES. WINDS MAY BE STRONG ENOUGH TO
PRODUCE MINOR DAMAGE...SUCH AS A FEW DOWNED BRANCHES.

&&

LAT...LON 4286 7085 4287 7082 4283 7081 4281 7087
      4280 7083 4282 7082 4276 7080 4277 7082
      4276 7082 4267 7124 4274 7125 4274 7118
      4279 7118 4282 7115 4281 7107 4286 7104
      4289 7093
TIME...MOT...LOC 1908Z 249DEG 43KT 4277 7117 

$$
FIELD

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 1:22 PM EDT	Special Weather Statement	BOX	Franklin	38 min
Jul 18, 1:42 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire	48 min
Jul 18, 2:18 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	27 min
Jul 18, 2:30 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	45 min
Jul 18, 2:56 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	34 min
Jul 18, 3:17 PM EDT	Severe Thunderstorm Warning	BOX	Essex	28 min
Jul 18, 3:31 PM EDT	Special Weather Statement	BOX	Middlesex	29 min
Jul 18, 3:53 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Suffolk	52 min
Jul 18, 4:08 PM EDT	Special Marine Warning	BOX		52 min
Jul 18, 4:14 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Suffolk	46 min
Jul 18, 4:31 PM EDT	Special Marine Warning	BOX		59 min
Jul 18, 4:34 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Plymouth, Suffolk	41 min
Jul 18, 4:42 PM EDT	Severe Thunderstorm Warning	BOX	Kent, Providence	18 min
Jul 18, 2:41 PM EDT	Special Weather Statement	BOX		49 min
Jul 18, 3:14 PM EDT	Special Weather Statement	BOX		46 min
Jul 18, 3:22 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region	38 min
Jul 18, 3:56 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	64 min

Nearby

Special Weather Statements in Massachusetts, 2016 Every special weather statement in 2016

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.