Severe Thunderstorm Warning 59, NWS Boston/Norton, MA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
325 PM EDT SUN JUL 25 1999

DISC:  INSTBY NOW MAINLY ACRS ERN PTN OF FCST AREA BUT WITH A FEW
CELLS JUST INTO NERN CT.  DRIER AIR AT LOW LVLS HAS MOVD INTO WRN
PTN OF FCST AREA WITH DEW PTS IN 50S IN A FEW PLACES AND THIS HAS
EFFECTIVELY KNOCKED OUT ALL SHWRS AND TSTMS WEST.  EXCP THE SHWRS
AND TSTMS E TO CONT POPPING UP BUT WITH THE AREA MOVG OFSHR AS
EVENING APCHS.  THE LWR DEW PTS WL THEN SPRD INTO ERN PTN AND THIS
WL LEAD TO LWR MIN TEMPS TNGT AS THE HUMID AIR MOVS E.  FURTHER
SHWRS TNGT SEEM UNLKLY.

THE COOL AIR ALF AND SFC TROF LINGERING ACRS SNE MAY PRODUCE SCT
SHWRS AND TSTMS AGAIN MON BUT WITH LESS LOW LVL LATENT HEAT SHUD BE
FEWER THAN THIS AFTN AND LESS LKLY TO BE SVR.  WK SFC GRAD CONDUCIVE
TO SEA BREEZE NR CSTS IN AFTN.

SFC/UPR TROF SHIFTING E ON TUE WITH WARMING AROUND 850 MB LVL GIVE A
LTL WARMER TEMPS DURG DAY WITH ONLY SML CHC OF SHWRS.

.BOX.v..SVR TSTM WATCH CONTG THRU 7 PM ERN PTN FCST AREA...

DMH

CTZ002>004-MAZ002>024-NHZ011-012-RIZ001>007-261005-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
1200 PM EDT SUN JUL 25 1999

...ANOTHER ROUND OF THUNDERSTORMS ACROSS SOUTHERN NEW ENGLAND
THIS AFTERNOON AND EVENING MAY BECOME SEVERE...

AN AREA OF LOW PRESSURE AND AN ASSOCIATED FRONTAL BOUNDARY OVER
SOUTHERN NEW ENGLAND WILL BE A FOCUS FOR MORE THUNDERSTORM ACTIVITY
THIS AFTERNOON AND EVENING.  THE COMBINATION OF WARM MOIST AIR AHEAD
OF THE FRONT AND COLDER AND DRIER AIR BEHIND THE FRONT WILL MAKE THE
ATMOSPHERE VERY UNSTABLE TODAY...PRODUCING ANOTHER ROUND OF
POTENTIALLY STRONG THUNDERSTORMS.

SOME OF THE THUNDERSTORMS MAY BE ACCOMPANIED BY FREQUENT LIGHTNING...
STRONG GUSTY WINDS AND LARGE HAIL. TORRENTIAL RAINFALL ACCOMPANYING
SOME OF THESE STORMS WILL CREATE LOCALIZED STREET FLOODING AND RAPID
RISES ON SMALL STREAMS.

ALTHOUGH STRONG AND POSSIBLY SEVERE THUNDERSTORMS CAN OCCUR ANYWHERE
IN SOUTHERN NEW ENGLAND THIS AFTERNOON...THE GREATEST RISK OF SEVERE
THUNDERSTORMS THIS AFTERNOON WILL MOST LIKELY EXTEND FROM THE
WORCESTER HILLS AND NORTHEAST CONNECTICUT EAST THROUGH THE REMAINDER
OF MASSACHUSETTS AND RHODE ISLAND.  SOUTHEAST MASSACHUSETTS AND RHODE
ISLAND ARE PARTICULARLY VULNERABLE TO SEVERE THUNDERSTORM POTENTIAL
AS THIS REGION WILL BE VERY MOIST AND UNSTABLE AND HAS AVOIDED MOST
OF THE THUNDERSTORM ACTIVITY DURING THE LAST COUPLE OF DAYS.  LOWER
CLOUDS ACROSS NORTHEAST MASSACHUSETTS WILL DELAY SURFACE HEATING FOR
A TIME...BUT STRONG THUNDERSTORMS WILL STILL BE POSSIBLE LATER IN THE
AFTERNOON.

STORMS HAVE ALREADY BEGUN TO DEVELOP ACROSS NEW HAMPSHIRE AND
FURTHER DEVELOPMENT THROUGHOUT SOUTHERN NEW ENGLAND IS
ANTICIPATED THROUGHOUT THE AFTERNOON AND EVENING.  THE BEST CHANCE OF
SEVERE THUNDERSTORMS WILL OCCUR FROM 2 PM THROUGH 8 PM THIS EVENING.

SPOTTERS AND AMATEUR RADIO OPERATORS SHOULD ONCE AGAIN GEAR UP BY
EARLY THIS AFTERNOON AND BE PREPARED TO RELAY REPORTS DURING THE
AFTEZRNOON AND EVENING SHOULD SEVERE WEATHER DEVELOP.

DCY

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MASSACHUSETTS
315 PM EDT SUN JUL 25 1999

TIME(EDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0135 PM    SUDBURY                   MA   .75 INCH HAIL
07/24/99   MIDDLESEX                       PER TV METEOROLOGIST

0146 PM    FRAMINGHAM                MA   .75 INCH HAIL
07/24/99   MIDDLESEX                       REPORTED BY AMATEUR RADIO

0150 PM    SUDBURY                   MA   1 INCH HAIL
07/24/99   MIDDLESEX                      HAIL AND ESTIMATED GUST TO
                                          60 MPH BY FIRE TOWER
                                          PERSONNEL/AMATEUR RADIO

0201 PM    WAYLAND                   MA   WIND DAMAGE
           MIDDLESEX                      SIX INCH DIAMETER TREES
                                          DOWN PER AMATEUR RADIO

0214 PM    WESTON                    MA   1 INCH HAIL
           MIDDLESEX                      REPORTED BY AMATEUR RADIO

0215 PM    HARVARD                   MA   .75 INCH HAIL
           WORCESTER                      REPORTED BY AMATEUR RADIO

0216 PM    WALTHAM                   MA   .75 INCH HAIL
           MIDDLESEX                      REPORTED BY STORM SPOTTER

0233 PM    BRIGHTON                  MA   .75 INCH HAIL
           SUFFOLK                         REPORTED BY STORM SPOTTER

0248 PM    BOSTON                    MA   58 MPH TSTM GUST
           SUFFOLK                        PER BOS ASOS

0250 PM    WARWICK                   RI   1 INCH HAIL
           KENT                           PER AMATEUR RADIOf

THOMPSON