Alert archive / Massachusetts / Special Weather Statements in 2011

Special Weather Statement, NWS Boston/Norton, MA

August 19, 2011Franklin County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Aug 19, 2011, 1:56 PM EDT for Franklin County, Massachusetts. It was in force for 34 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 19, 2011, 1:56 PM EDT (17:56 UTC)
Expired
Aug 19, 2011, 2:30 PM EDT
In force
34 min
Issued by
NWS Boston/Norton, MA

County Franklin County, MA

The radar

The Albany radar (KENX), 110 km from the middle of the area, began a volume at 17:59 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

Albany, NY (KALY), launched 12:00Z, 5.9 hours before the alert went out and 90 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, Albany, NY at 12:00Z on 2011-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 205 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, Albany, NY at 12:00Z on 2011-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 square meters per square second.193958Sfc1 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
205 J/kg
Mixed-layer CIN
-129 J/kg
Mixed-layer LCL
940 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
42 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.

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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 19, 1:53 PM EDT, 3 minutes earlier.

Area forecast discussion, Aug 19, 1:53 PM EDT, 3 minutes before
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Hazardous weather outlook, Aug 19, 9:03 AM EDT, 4 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
903 AM EDT FRI AUG 19 2011

CTZ002>004-MAZ002>024-026-NHZ011-012-015-RIZ001>008-201315-
HARTFORD CT-TOLLAND CT-WINDHAM CT-WESTERN FRANKLIN MA-
EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-CENTRAL MIDDLESEX MA-
WESTERN ESSEX MA-EASTERN ESSEX MA-WESTERN HAMPSHIRE MA-
WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
SOUTHERN WORCESTER MA-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-EASTERN NORFOLK MA-NORTHERN BRISTOL MA-
WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-SOUTHERN BRISTOL MA-
SOUTHERN PLYMOUTH MA-BARNSTABLE MA-DUKES MA-NANTUCKET MA-
NORTHERN MIDDLESEX MA-CHESHIRE NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-BRISTOL RI-
WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
903 AM EDT FRI AUG 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN
CONNECTICUT...CENTRAL MASSACHUSETTS...EASTERN
MASSACHUSETTS...NORTHEASTERN MASSACHUSETTS...SOUTHEASTERN
MASSACHUSETTS...WESTERN MASSACHUSETTS...SOUTHERN NEW
HAMPSHIRE...NORTHERN RHODE ISLAND AND SOUTHERN RHODE ISLAND.

.DAY ONE...TODAY AND TONIGHT.

AN ISOLATED STRONG TO SEVERE THUNDERSTORM OR TWO WITH HAIL IS
POSSIBLE THIS AFTERNOON AND/OR EARLY THIS EVENING. IN
ADDITION...ANY STORM THAT DEVELOPS WILL MOVE SLOW AND MAY RESULT
IN VERY ISOLATED AND LOCALIZED FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A FEW STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE SUNDAY
AFTERNOON AND EVENING OR MONDAY AFTERNOON. THERE IS CONSIDERABLE
UNCERTAINTY IN THE TIMING OF ANY STRONG THUNDERSTORMS LATE IN THE
WEEKEND OR EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

ANZ230>237-250-251-254>256-201315-
BOSTON HARBOR-CAPE COD BAY-NANTUCKET SOUND-VINEYARD SOUND-
BUZZARDS BAY-RHODE ISLAND SOUND-NARRAGANSETT BAY-BLOCK ISLAND SOUND-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK NATIONAL
MARINE SANCTUARY-MASSACHUSETTS BAY AND IPSWICH BAY-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD AND
NANTUCKET-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT TO
20 NM SOUTH OF BLOCK ISLAND-
903 AM EDT FRI AUG 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MASSACHUSETTS COASTAL WATERS
AND RHODE ISLAND COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT.

AN ISOLATED STRONG TO SEVERE THUNDERSTORM OR TWO WITH LARGE HAIL
IS POSSIBLE NEAR SHORE THIS AFTERNOON AND/OR EARLY EVENING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A FEW STRONG THUNDERSTORMS ARE POSSIBLE SOMETIME SUNDAY AFTERNOON
INTO MONDAY...BUT CONFIDENCE AND TIMING REMAINS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

In the hours before

Special weather statement, Aug 19, 1:56 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
156 PM EDT FRI AUG 19 2011

MAZ002-003-191830-
EASTERN FRANKLIN MA-WESTERN FRANKLIN MA-
156 PM EDT FRI AUG 19 2011

AT 152 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL AND GUSTY
WINDS OF UP TO 40 MPH OVER BUCKLAND...OR ABOUT 9 MILES WEST OF
GREENFIELD...MOVING NORTHEAST AT 5 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...SHELBURNE...LEYDEN AND COLRAIN.

FOR YOUR SAFETY...GET INSIDE WHEN THESE STORMS APPROACH. THESE STORMS
MAY STRENGTHEN AND COULD PRODUCE DAMAGING WINDS OR LARGE HAIL. STAY
TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR POSSIBLE
WARNINGS.

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 4273 7280 4273 7258 4266 7258 4257 7263
      4253 7277 4258 7293

SIPPRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 12:51 PM EDTAreal Flood AdvisoryBOXFranklin3 hr
Aug 19, 2:02 PM EDTSpecial Weather StatementBOXWorcester43 min
Aug 19, 2:14 PM EDTSevere Thunderstorm WarningBOXFranklin46 min
Aug 19, 2:27 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Worcester35 min
Aug 19, 2:33 PM EDTSpecial Weather StatementBOXWorcester42 min
Aug 19, 2:36 PM EDTFlash Flood WarningBOXFranklin4 hr
Aug 19, 2:41 PM EDTSpecial Weather StatementBOXNorfolk34 min
Aug 19, 2:57 PM EDTSpecial Weather StatementBOXFranklin48 min
Aug 19, 2:57 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Suffolk25 min
Aug 19, 3:06 PM EDTAreal Flood AdvisoryBOXMiddlesex, Norfolk, Suffolk54 min
Aug 19, 3:07 PM EDTSpecial Weather StatementBOXWorcester53 min
Aug 19, 3:14 PM EDTAreal Flood AdvisoryBOXWorcester75 min
Aug 19, 3:15 PM EDTSpecial Marine WarningBOX45 min
Aug 19, 3:18 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Norfolk, Suffolk27 min
Aug 19, 3:18 PM EDTSevere Thunderstorm WarningBOXFranklin27 min
Aug 19, 3:22 PM EDTSevere Thunderstorm WarningBOXWorcester33 min
Aug 19, 3:29 PM EDTSevere Thunderstorm WarningBOXMiddlesex36 min
Aug 19, 3:36 PM EDTAreal Flood AdvisoryBOXEssex, Middlesex, Suffolk72 min
Aug 19, 3:39 PM EDTSpecial Weather StatementBOXEssex66 min
Aug 19, 3:47 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex, Suffolk43 min
Aug 19, 3:53 PM EDTSpecial Marine WarningBOX67 min
Aug 19, 3:57 PM EDTSevere Thunderstorm WarningBOXEssex, Middlesex23 min
Aug 19, 4:02 PM EDTAreal Flood AdvisoryBOXMiddlesex, Worcester29 min
Aug 19, 4:22 PM EDTSpecial Marine WarningBOX53 min
Aug 19, 4:36 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampshire39 min
Aug 19, 4:57 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire63 min
Aug 19, 5:02 PM EDTAreal Flood AdvisoryBOXFranklin, Hampshire3 hr
Aug 19, 5:07 PM EDTSevere Thunderstorm WarningBOXFranklin, Worcester38 min
Aug 19, 5:34 PM EDTSevere Thunderstorm WarningBOXFranklin26 min
Aug 19, 6:43 PM EDTSpecial Weather StatementBOXHampshire62 min
Aug 19, 7:25 PM EDTSpecial Weather StatementBOXHampden50 min
Aug 19, 7:30 PM EDTAreal Flood AdvisoryBOXHampden64 min
Aug 19, 2:10 PM EDTSpecial Weather StatementBOXProvidence50 min
Aug 19, 4:08 PM EDTSpecial Weather StatementBOXHillsborough37 min
Aug 19, 4:38 PM EDTSpecial Weather StatementBOXHillsborough37 min
Aug 19, 4:47 PM EDTSpecial Weather StatementBOXHillsborough28 min
Aug 19, 5:00 PM EDTSpecial Weather StatementBOXCheshire45 min
Aug 19, 5:36 PM EDTSpecial Weather StatementBOXHillsborough39 min
Aug 19, 5:54 PM EDTSpecial Weather StatementBOXHillsborough66 min
Aug 19, 6:31 PM EDTSpecial Weather StatementBOXCheshire44 min

Nearby

Special Weather Statements in Massachusetts, 2011Every 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.