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W1GMF > SKYWRN 11.05.09 12:56l 67 Lines 2297 Bytes #999 (0) @ NEWENG
BID : 59621_W1GMF
Read: GUEST
Subj: SUNDERLAND WEAK TORNADO
Path: ON0AR<N9ZZK<KD4GCA<N1NTP<KE1AB<W1GMF
Sent: 090511/1135Z @:W1GMF.#EMA.MA.USA.NOAM #:59621 [ABINGTON, MA] FBB7.00e
From: W1GMF@W1GMF.#EMA.MA.USA.NOAM
To : SKYWRN@NEWENG
Public Information Statement: 5/9/09 Sunderland, Massachusetts Weak Tornado/Gustnado?
Hello to all..
The following is a Public Information Statement on a weak tornado/gustnado
that occurred in Sunderland, Massachusetts during the Severe Thunderstorm
event that affected portions of Massachusetts, New Hampshire and Vermont.
See Statement below:
000
NOUS41 KBOX 102137
PNSBOX
CTZ002>004-MAZ002>024-026-NHZ011-012-015-RIZ001>008-111200-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
537 PM EDT SUN MAY 10 2009
...A WEAK TORNADO OR GUSTNADO LIKELY CAUSED DAMAGE IN SUNDERLAND
MASSACHUSETTS SATURDAY EVENING...
A PRELIMINARY SURVEY INDICATES THAT A WEAK AND SMALL SHALLOW
TORNADO...OR MOST LIKELY A GUSTNADO...WENT THROUGH A PORTION OF
SUNDERLAND IN FRANKLIN COUNTY MASSACHUSETTS AROUND 705 PM EDT
SATURDAY MAY 9. THE MOST NOTABLE DAMAGE WAS A TOBACCO BARN THAT WAS
BLOWN ONTO ROUTE 47 OR RIVER STREET. THERE WAS ALSO SOME TREE DAMAGE
IN THE AREA.
MAXIMUM WIND GUSTS WERE ESTIMATED TO BE 60 TO 70 MPH. PRELIMINARY
CLASSIFICATION OF THIS WEAK SHALLOW TORNADO...OR GUSTNADO...WILL BE
AN EF0 ON THE ENHANCED FUJITA SCALE. THE TRACK WAS ESTIMATED TO BE
ONE HALF TO THREE QUARTERS OF A MILE LONG AND A WIDTH THAT VARIED
FROM 100 TO 400 FEET WIDE.
A DAMAGE SURVEY CONDUCTED BY A TRAINED SKYWARN AMATEUR RADIO
COORDINATOR INDICATED CONVERGING DAMAGE BASED UPON THE ORIENTATION
OF DOWNED TREES AND DISTURBED VEGETATION. NATIONAL WEATHER SERVICE
RADAR IMAGERY DID NOT REVEAL ANY ROTATION IN THE LOW TO MID PORTIONS
OF THE STORM. RATHER...THE RADAR INDICATED A BOW ECHO SIGNATURE...
USUALLY SUGGESTIVE OF STRONG STRAIGHT-LINE WINDS. THUS...THIS MOST
LIKELY WAS A GUSTNADO. GUSTNADOES ARE USUALLY GENERATED BY A SHALLOW
SWIRL OR EDDY OF AIR AT THE LEADING EDGE OF STRONG STRAIGHT-LINE
WINDS EMANATING FROM THE BASE OF THE STORM.
$$
THOMPSON
Respectfully Submitted,
Robert Macedo (KD1CY)
ARES SKYWARN Coordinator
Eastern Massachusetts ARES Section Emergency Coordinator
Pager #: (508) 354-3142
Home Phone #: (508) 994-1875 (After 6 PM)
Home/Data #: (508) 997-4503 (After 6 PM)
Work Phone #: 1-800-445-2588 Ext.: 72929 (8 AM-5 PM)
Email Address: rmacedo@rcn.com
http://ares.ema.arrl.org
http://www.wx1box.org
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