Alert archive / Massachusetts / Special Weather Statements in 2011

Special Weather Statement, NWS Boston/Norton, MA

August 25, 2011Hampden County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Aug 25, 2011, 9:36 PM EDT for Hampden County, Massachusetts. It was in force for 54 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 25, 2011, 9:36 PM EDT (01:36 UTC)
Expired: Aug 25, 2011, 10:30 PM EDT
In force: 54 min
Issued by: NWS Boston/Norton, MA

County Hampden County, MA

The radar

The Boston radar (KBOX), 101 km from the middle of the area, began a volume at 01:38 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

Brookhaven, NY (KOKX), launched 00:00Z, 1.6 hours before the alert went out and 151 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: 227 J/kg
Mixed-layer CIN: -141 J/kg
Mixed-layer LCL: 1072 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 291 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this special weather statement went out at Aug 25, 7:26 PM EDT, 2 hours 10 minutes earlier.

Area forecast discussion, Aug 25, 7:26 PM EDT, 2 hours 10 minutes before

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Hazardous weather outlook, Aug 25, 5:02 PM EDT, 4 hours 34 minutes before

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In the hours before

Special weather statement, Aug 25, 7:55 PM EDT, 1 hour 41 minutes before

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Special weather statement, Aug 25, 9:00 PM EDT, 36 minutes before

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Special weather statement, Aug 25, 9:36 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
936 PM EDT THU AUG 25 2011

MAZ004-010>012-260230-
EASTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-NORTHERN WORCESTER
MA-SOUTHERN WORCESTER MA-
936 PM EDT THU AUG 25 2011

AT 933 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM PRODUCING FREQUENT LIGHTNING 2 MILES SOUTH OF
CHICOPEE...MOVING EAST AT 25 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...SPRINGFIELD...EAST LONGMEADOW...
  LUDLOW...WILBRAHAM...HAMPDEN...PALMER...MONSON...WALES...WARREN...
  BRIMFIELD...WEST BROOKFIELD...HOLLAND AND BROOKFIELD.

FOR YOUR SAFETY...GET INSIDE WHEN THIS STORM APPROACHES. WINDS MAY BE
STRONG ENOUGH TO BRING DOWN SMALL BRANCHES. MINOR STREET FLOODING AND
PONDING OF WATER IN POOR DRAINAGE AREAS IS ALSO POSSIBLE.

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 4224 7210 4204 7210 4206 7268 4224 7266

DOODY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 9:00 PM EDT	Special Weather Statement	BOX	Hampden	60 min
Aug 25, 9:16 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampden, Hampshire	93 min
Aug 26, 12:58 AM EDT	Special Marine Warning	BOX		62 min
Aug 26, 3:10 AM EDT	Flood Watch	BOX	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more	63 hr
Aug 26, 5:10 AM EDT	Hurricane Watch	BOX	Barnstable, Bristol, Dukes, Essex, Nantucket, Norfolk and 2 more	12 hr
Aug 26, 5:10 AM EDT	Tropical Storm Watch	BOX	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 3 more	30 hr
Aug 26, 5:33 PM EDT	Hurricane Warning	BOX	Barnstable, Bristol, Dukes, Nantucket, Plymouth	42 hr
Aug 26, 5:33 PM EDT	Tropical Storm Warning	BOX	Barnstable, Bristol, Dukes, Essex, Franklin, Hampden and 7 more	54 hr
Aug 25, 10:25 PM EDT	Special Weather Statement	BOX	Kent, Providence	35 min

Nearby

Special Weather Statements in Massachusetts, 2011 Every special weather statement in 2011

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.