Alert archive / Massachusetts / Special Weather Statements in 2012

Special Weather Statement, NWS Boston/Norton, MA

August 2, 2012Middlesex County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Aug 2, 2012, 3:45 PM EDT for Middlesex County, Massachusetts. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 2, 2012, 3:45 PM EDT (19:45 UTC)
Expired
Aug 2, 2012, 4:15 PM EDT
In force
30 min
Issued by
NWS Boston/Norton, MA

County Middlesex County, MA

The radar

The Boston radar (KBOX), 74 km from the middle of the area, began a volume at 19:47 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.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 7.8 hours before the alert went out and 148 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-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2012-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 106 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2012-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
106 J/kg
Mixed-layer CIN
-110 J/kg
Mixed-layer LCL
868 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
8 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

036 
WWUS81 KBOX 021945
SPSBOX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
345 PM EDT THU AUG 2 2012

MAZ005-006-022015-
CENTRAL MIDDLESEX COUNTY MA-WESTERN ESSEX MA-
345 PM EDT THU AUG 2 2012

AT 345 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
STRONG THUNDERSTORM CAPABLE OF PRODUCING SMALL HAIL AND VERY HEAVY 
RAIN ABOUT 2 MILES SOUTHWEST OF TEWKSBURY...OR ABOUT 3 MILES 
SOUTHEAST OF LOWELL...MOVING EAST AT 10 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...TEWKSBURY AND WILMINGTON.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4267 7116 4253 7116 4258 7133 4262 7133

$$

NOCERA

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 1:29 PM EDTSpecial Weather StatementBOXMiddlesex61 min
Aug 2, 3:25 PM EDTSpecial Weather StatementBOXSuffolk35 min
Aug 2, 4:08 PM EDTSpecial Weather StatementBOXBristol22 min
Aug 2, 4:46 PM EDTSpecial Weather StatementBOXSuffolk29 min
Aug 2, 5:24 PM EDTSpecial Marine WarningBOX36 min
Aug 2, 5:06 PM EDTSpecial Weather StatementBOXBristol24 min

Nearby

Special Weather Statements in Massachusetts, 2012Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.