Isolated showers and thunderstorms developed ahead of an approaching warm front.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BOX wrote it up.
Isolated showers and thunderstorms developed ahead of an approaching warm front.
The local office's own words before the first event, 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 the first event at Jun 27, 1:30 PM EST, 2 hours 30 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TAUNTON MA 230 PM EDT SUN JUN 27 2010 .SYNOPSIS... A WARM FRONT WILL LIFT NORTH FROM THE MID ATLC REGION TODAY AND MOVE THROUGH THE REGION TONIGHT. HOT AND HUMID CONDITIONS ARE EXPECTED ON MONDAY...WITH STRONG THUNDERSTORMS POSSIBLE AS A COLD FRONT APPROACHES FROM THE WEST. THE STALLS OVER EASTERN PORTIONS OF THE AREA TUE BEFORE PUSHING OFFSHORE. A GRADUAL COOLING TREND IS EXPECTED THROUGH MIDWEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 229 PM...UPDATED ZFP AND CWF TO ACCOUNT FOR DEVELOPING/EXPANDING AREA OF MARINE STRATUS...MAREPS AND ASOS SITES ON SOUTH COASTAL WATERS INDICATING AREAS OF DENSE FOG WITH VSBY 1/2 TO 1/4 MILE. PREVIOUS DISCUSSION FOLLOWS... WARM FRONT SHOULD REMAIN JUST SW OF THE REGION THROUGH LATE TODAY. HOWEVER...LOW LEVEL THETA-E RIDGE AXIS MOVES INTO SNE TODAY FROM THE SW. THIS COMBINED WITH WEAK INSTABILITY SUPPORTS CHC POPS THROUGH THE PM WITH HIGHEST PROBABILITY IN THE INTERIOR. OTHERWISE...EXPECT PTSUNNY SKIES ACROSS MUCH OF THE REGION TODAY WITH SEABREEZES LIKELY ALONG THE COAST. WARMER 850 MB TEMPS ADVECTING INTO REGION WITH 13-15C BY 18Z AND 14-17C BY 00Z. PROBABLY WONT SEE FULL MIXING POTENTIAL TO 850 MB TODAY...ESPECIALLY NEAR THE COAST SO USED A BLEND OF MAV/MET GUIDANCE FOR TEMPS. WARMEST READINGS IN THE LOWER CT VALLEY WITH MID/UPPER 80S. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/... WARM FRONT MOVES NWD ACROSS SNE OVERNIGHT WITH THE CORE OF THE HIGH THETA-E AIRMASS MOVING INTO THE REGION 06-12Z. MCS LIKELY OVER THE LAKES THIS EVENING AND THIS SHOULD REMAIN WELL TO THE NORTH TONIGHT AS ONE PIECE OF THE LLJ MOVES EWD FROM THE LAKES AND IS FOCUSED IN SE CANADA. HOWEVER...BROAD SW LLJ MOVES INTO SNE OVERNIGHT WITH ELEVATED INSTABILITY AND THETA-E RIDGE SO THE POTETNIAL EXISTS FOR SHOWERS/TSTMS LATE TONIGHT...ESPECIALLY NW ZONES AND THERE IS A LOW PROB OF ISOLD SVR WITH ANY TSTMS LATE TONIGHT. MONDAY...MAIN CONCERN IS THE POTENTIAL FOR SEVERE WX AS COLD FRONT APPROACHES FROM THE WEST WITH POSSIBLE PREFRONTAL TROF FOCUSING CONVECTION IN THE AFTERNOON. DEBRIS CLOUDS AND POSSIBLE LEFTOVER SHOWERS SHOULD EXIT THE REGION IN THE MORNING WITH PARTIAL SUNSHINE DEVELOPING. HOT/HUMID AIRMASS WILL BE IN PLACE WITH 850 MB TEMPS 20-21C...COOLING SLIGHTLY IN THE AFTERNOON. WITH W/SW FLOW...WE SHOULD SEE MAXES REACHING LOW TO MID 90S ACROSS CT AND INTERIOR RI AND E MA...COOLER ALONG THE S COAST AND NW HIGHER TERRAIN. GUSTY SW WINDS WILL DEVELOP WITH G25-30 KTS LIKELY...HIGHEST COASTAL PLAIN. DEWPOINTS EXPECTED TO RISE INTO THE LOWER 70S. CAPES SHOULD REACH 2000+ J/KG IN THIS AIRMASS. 500 MB WINDS 40-50 KT WHICH WILL GENERATE ENOUGH DEEP LAYER SHEAR TO SUPPORT ORGANIZED SEVERE WX WITH UNIDIRECTIONAL SHEAR PROFILE SUGGESTING MULTICELLUAR STORMS. HOWEVER...THERE ARE NEGATIVE FACTORS WHICH COULD LIMIT COVERAGE AND INTENSITY OF SEVERE STORMS. TEMPS ALOFT ARE WARM RESULTING IN WEAK MID LEVEL LAPSE RATES. IF DEBRIS CLOUDS OR SHOWERS PERSIST LONGER THAN EXPECTED...INSTABILITY MAY NOT REACH FULL POTENTIAL. COLD FRONT NOT EXPECTED UNTIL MON NIGHT SO LOW LEVEL CONVERGENCE MAY BE LIMITED UNLESS PREFRONTAL TROF DEVELOPS WHICH IS NOT CERAIN. SO THIS IS NOT A SLAM DUNK WIDESPREAD SEVERE EVENT...BUT ENOUGH INGREDIENTS ARE IN PLACE TO SUPPORT SEVERE WX WITH HIGHEST PROB IN THE INTERIOR. HEAT INDICES MAY APPROACH 100 DEGREES IN A FEW SPOTS IN CT/RI AND E MA. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... MONDAY NIGHT...WILL CONTINUE TO CARRY HIGH CHANCE TO LOW LIKELY POPS FOR SCATTERED EVENING SHOWERS AND THUNDERSTORMS ACROSS SE AREAS AS THE PRE FRONTAL TROUGH AND LEFTOVER INSTABILITY SLOWLY EXITS THE AREA. A HIGH PRECIPITABLE WATER AIRMASS LEFTOVER AHEAD OF THE TROUGH WILL PROVIDE A FAVORABLE ENVIRONMENT FOR LOCALLY HEAVY RAINFALL. FOLLOWED THE LESS PROGRESSIVE 00Z GFS AS MODEL OF CHOICE MONDAY NIGHT AND TUESDAY. TUESDAY...A COLD FRONT REMAINS NEARLY STALLED OVER THE FORECAST AREA. SFC DEWPOINTS ACROSS EASTERN CT/RI/SE MASS REMAIN WELL INTO THE 60S. IN ADDITION THE REAR RIGHT QUADRANT OF THE H25 JET WILL BE PRESENT. WILL ADD LOW CHANCE POPS TUE AFTERNOON AND EARLY EVENING FOR THE SOUTHEASTERN PORTION OF THE FORECAST AREA. THE FRONT SLOWLY EXITS THE COAST TUESDAY NIGHT AS THE UPPER LEVEL TROUGH APPROACHES FROM THE NORTHWEST. WEDNESDAY THROUGH SATURDAY...MODEL DIFFERENCES AND ENSEMBLE SPREAD CONTINUES REGARDING THE AMPLITUDE AND LOCATION OF THE CANADIAN H5 UPPER LEVEL TROUGH...ALTHOUGH WITH SOME IMPROVED AGREEMENT NOTED OVER THE PAST 24 HOURS. GENERALLY PREFER THE SLOWER DEPARTURE OF THE COLD POOL GIVEN THE OMEGA BLOCK PATTERN. WILL ADVERTISE SLIGHT CHANCE POPS THROUGH FRI THEN DRY SATURDAY AS THE UPPER LEVEL FLOW BECOMES MORE ANTICYCLONIC. USED A MODEL BLEND OF MOS/HPC GUIDANCE. OVERALL EXPECT COOLER THAN NORMAL TEMPERATURES THROUGH MIDWEEK WITH A REBOUND TO NORMAL TEMPS BY SATURDAY. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... TODAY...AWAY FROM COASTAL MA/RI...MEDIUM CONFIDENCE OF VFR CIGS 5-10KFT...BUT CONTINUED LOW PROB OF ISOLATED MVFR SHOWERS/THUNDERSTORMS. SEABREEZES CONTINUE THIS AFTERNOON ALONG THE COAST...INCLUDING BOS AND PVD. SOUTH COASTAL MA AND RI...SW FLOW CONTRIBUTING TO FORMATION OF MARINE STRATUS WHICH HAS BEEN EXPANDING IN AREAL SIZE FROM SOUTH OF LONG ISLAND NORTHEASTWARD PAST ACK. ACK LIKELY TO STAY IN LIFR/IFR CONDITIONS. HYA/FMH PERIODS OF MVFR CIGS. TONIGHT...AWAY FROM SOUTH COASTAL MA...MEDIUM CONFIDENCE ON VFR CIGS WITH AREAS OF MVFR FOG. THERE IS A LOW PROBABILITY OF IFR/LIFR CONDITIONS DEVELOPING ACROSS THE REGION...BUT LOW CONFIDENCE IN THIS SCENARIO SO WE DID NOT USE THIS IN THE TAF. SCT SHOWERS/TSTMS POSSIBLE TONIGHT...PRIMARILY IN THE INTERIOR. KBOS...SEASBREEZE CONTINUES WITH ESE WINDS THROUGH THE BALANCE OF THIS AFTERNOON. MEDIUM/LOW CONFIDENCE ON VFR CIGS/VSBY TONIGHT. THERE IS A LOW PROBABILTY CIGS AND VSBYS LOWERING TO MVFR. MONDAY...AREAS OF MVFR FOG EARLY WITH IFR AT ACK...OTHERWISE VFR. SW WIND GUSTS TO 25-30 KT ESPECIALLY COASTAL PLAIN. MODERATE CONFIDENCE OF SCT TSTMS DEVELOPING IN THE AFTERNOON WITH BRIEF MVFR/IFR...E SPECIALLY INTERIOR. STRONGER STORMS MAY ALSO BE ACCOMPANIED BY STRONG WIND GUSTS. OUTLOOK...MONDAY NIGHT THROUGH THURSDAY... MONDAY NIGHT...VFR BUT MODERATE TO HIGH CONFIDENCE SCT MVFR/IFR CEILINGS WITH SCT EVENING SHRA-TSRA PARTICULARLY S COAST AS A COLD FRONT PASSES THROUGH THE REGION. TUESDAY...VFR. WDLY SCT PM SHRA/TSRA ALONG AND SE OF INTERSTATE 95. WEDNESDAY AND THURSDAY...MODERATE TO HIGH CONFIDENCE VFR CEILINGS AND VSBYS. && .MARINE... WINDS AND SEAS BELOW SCA THROUGH TONIGHT. LIGHT WINDS TODAY WITH S/SW FLOW INCREASING LATE TONIGHT. AREAS OF DENSE FOG SOUTH COASTAL WATERS...MARINE WEATHER STATEMENT HAS BEEN ISSUED ADDRESSING THIS. MONDAY...INCREASING SW WINDS WITH SCA GUSTS TO 25-30 KTS POSSIBLE...HIGHEST PROBABILITY OVER BOS HARBOR AND NARRAGANSETT BAY WHERE BEST MIXING. SFC INVERSION OVER THE WATER WILL LIMIT GUSTS OVER OUTER WATERS. WNAWAVE WAY OVERDONE WITH ITS SW FLOW BIAS AND WE UNDERCUT BY 40 PERCENT. WE HAVE SEAS BUILDING TO 5-6 FT BY LATE MON. OUTLOOK...MONDAY NIGHT THROUGH THURSDAY.... MONDAY NIGHT...A SMALL CRAFT ADVISORY FOR SEAS MAY BE NECESSARY. WAVEWATCH CARRYING 8 TO 10 FOOT SEAS...LIKELY OVERDONE BUT SHOULD SEE 5 TO 6 FOOT SEAS S OUTER COASTAL WATERS. TUESDAY...SCA FOR LEFTOVER 5 FOOT SEAS S OUTER COASTAL WATERS POSSIBLE. WEDNESDAY AND THURSDAY...WINDS AND SEAS EXPECTED TO REMAIN BELOW SCA CRITERIA. && .CLIMATE... WARMEST AVERAGE TEMPERATURES FIRST HALF OF THE YEAR JAN 1 -JUN 30 BOS 48.9F 1976 BDL 48.6F 1991 PVD 48.6F 1991 ORH 46.3F 1921 JAN 1 THROUGH JUN 25 2010 BOS 48.2F 2010 48.2F 1976 BDL 48.1F 2010 47.8F 1991 PVD 48.5F 2010 47.8F 1998 AND 1991 ORH 44.8F 2010 45.6F 1921 WARMEST JUNE AVERAGE TEMPERATURE JUNE 1-30 BOS 73.4F 1976 BDL 72.7F 1976 PVD 72.2F 1943 ORH 70.4F 1923 AND 1892 JUNE 1-25 2010 BOS 69.3F +1.9F BDL 69.9F +1.9F PVD 69.7F +2.7F ORH 66.7F +2.6F JAN THROUGH MAY 2010 HAVE HAD ABOVE AVERAGE MONTHLY TEMPERATURES WITH THE LAST BELOW NORMAL MONTH RECORDED DECEMBER 2009 AT THE LCD SITES. THIS SHOULD BE A NEAR TOP TEN WARMEST JUNE FOR THE LCDS WITH PROVIDENCE CURRENTLY TIED 7TH FOR THE JUNE 1-25 TIMEFRAME. && .BOX WATCHES/WARNINGS/ADVISORIES... CT...NONE. MA...NONE. NH...NONE. RI...NONE. MARINE...NONE. && SYNOPSIS...KJC/STRAUSS NEAR TERM...KJC/NMB SHORT TERM...KJC LONG TERM...STRAUSS AVIATION...KJC/STRAUSS/NMB MARINE...KJC/STRAUSS CLIMATE...
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TAUNTON MA 458 AM EDT SUN JUN 27 2010 CTZ003-004-MAZ002>004-006>012-019>024-026-NHZ011-015-RIZ003-005>008- 280900- TOLLAND CT-WINDHAM CT-WESTERN FRANKLIN MA-EASTERN FRANKLIN MA- NORTHERN WORCESTER MA-WESTERN ESSEX MA-EASTERN ESSEX MA- WESTERN HAMPSHIRE MA-WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA- EASTERN HAMPDEN MA-SOUTHERN WORCESTER MA-EASTERN PLYMOUTH MA- SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-BARNSTABLE MA-DUKES MA- NANTUCKET MA-NORTHERN MIDDLESEX MA-CHESHIRE NH- WESTERN AND CENTRAL HILLSBOROUGH NH-WESTERN KENT RI-BRISTOL RI- WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI- 458 AM EDT SUN JUN 27 2010 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. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE IS A MODERATE PROBABILITY THAT THUNDERSTORMS MAY PRODUCE DAMAGING WIND GUSTS AND HAIL MONDAY AFTERNOON AND EVENING AS A COLD FRONT APPROACHES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED MONDAY. ANZ230>237-250-251-254>256-280900- 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- 458 AM EDT SUN JUN 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR MASSACHUSETTS COASTAL WATERS AND RHODE ISLAND COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE IS A LOW TO MODERATE PROBABILITY THAT SCATTERED THUNDERSTORMS MAY PRODUCE DAMAGING WIND GUSTS AND HAIL MONDAY AFTERNOON AND EVENING AS A COLD FRONT APPROACHES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED MONDAY. CTZ002-MAZ005-013>018-NHZ012-RIZ001-002-004-280900- HARTFORD CT-CENTRAL MIDDLESEX MA-WESTERN NORFOLK MA- SOUTHEAST MIDDLESEX MA-SUFFOLK MA-EASTERN NORFOLK MA- NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-EASTERN HILLSBOROUGH NH- NORTHWEST PROVIDENCE RI-SOUTHEAST PROVIDENCE RI-EASTERN KENT RI- 458 AM EDT SUN JUN 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN CONNECTICUT...EASTERN MASSACHUSETTS...SOUTHEASTERN MASSACHUSETTS...SOUTHERN NEW HAMPSHIRE AND NORTHERN RHODE ISLAND. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE IS A MODERATE PROBABILITY THAT THUNDERSTORMS MAY PRODUCE DAMAGING WIND GUSTS AND HAIL MONDAY AFTERNOON AND EVENING AS A COLD FRONT APPROACHES. THERE IS A LOW PROBABILITY A HEAT ADVISORY MAY BE NECESSARY MONDAY. THE COMBINATION OF HIGH HEAT AND HUMIDITY WILL MAKE IT FEEL LIKE THE UPPER 90S TO NEAR 100 DEGREES FOR A TIME MONDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED MONDAY.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TAUNTON MA 418 PM EDT SUN JUN 27 2010 MAZ013-016-018-019-272100- EASTERN NORFOLK MA-EASTERN PLYMOUTH MA-WESTERN NORFOLK MA-WESTERN PLYMOUTH MA- 418 PM EDT SUN JUN 27 2010 AT 413 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH OVER RANDOLPH...OR ABOUT 5 MILES NORTH OF BROCKTON...MOVING EAST AT 20 MPH. * SOME LOCATIONS AFFECTED INCLUDE...HOLBROOK...ABINGTON...WHITMAN... ROCKLAND...HANSON AND HANOVER. 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 4219 7078 4205 7082 4212 7112 4219 7109 EKSTER
The Boston radar (KBOX), 31 km away, was scanning. The volume nearest the first event began at 20:59 UTC.
1 thunderstorm wind. Local standard time, as filed.
Large branches were downed by thunderstorm winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2010Every state in 2010This day in weather historyWarnings in Massachusetts, June 2010
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 244700.