A very hot and humid air mass remained entrenched across the forecast area on the 20th of July. An approaching cold front set the stage for more severe thunderstorms across the region.
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 GYX wrote it up.
A very hot and humid air mass remained entrenched across the forecast area on the 20th of July. An approaching cold front set the stage for more severe thunderstorms across the region. Once again elevated freezing levels inhibited development of large hail and all reports of severe weather involved wind damage.
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 Gray, ME wrote its last area forecast discussion before the first event at Jul 20, 2:45 PM EST, 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 345 PM EDT SAT JUL 20 2013 .SYNOPSIS... SEVERE THUNDERSTORMS ARE POSSIBLE THROUGH 9 PM THIS EVENING. A COLD FRONT WILL MOVE OFF THE COAST TONIGHT. HIGH PRESSURE FOLLOWS THE FRONT USHERING COOLER AND LESS HUMID AIR. THE HIGH WILL PROVIDE DRY WEATHER THROUGH MONDAY. LOW PRESSURE WILL MOVE THROUGH SOUTHERN NEW ENGLAND MONDAY NIGHT AND TUESDAY. A COLD FRONT WILL CROSS THE REGION TUESDAY NIGHT AND STALL OFF THE COAST. WEAK AREAS OF LOW PRESSURE WILL MOVE ALONG THE FRONT WEDNESDAY THROUGH FRIDAY. && .NEAR TERM /THROUGH TONIGHT/... LOOKING AT COMPOSITE NWS AND EC RADAR OF THE NE AND QUE/ONT...CONVECTION IS FIRING UP ON 3 SEPARATE BOUNDARIES...ONE CROSSING OUR SERN ZONES...POSSIBLY OUTFLOW BOUNDARY FROM LAST NIGHTS STORMS...ON ACROSS NRN CWA...A PRE-FRONTAL TROUGH...AND ONE IN THE ST LAWRENCE VALLEY OF QUEBEC...THE SO-CALLED COLD FRONT. STORMS ALONG THE FARTHEST S BOUNDARY WILL SKIM ROCKINGHAM CTY AND SRN COASTAL WATERS UNTIL ABOUT 21Z....WHILE STORMS ALONG THE PRE- FRONTAL TROUGH WILL SLIDE SE ACROSS CENTRAL AND SRN NH AND WESTERN ME TOWARD THE COAST THROUGH ABOUT 22-23Z. THESE TWO BOUNDARIES WILL BE THE FOCUS FOR SVR CONVECTION...MAINLY IN THE FORM OF DAMAGING WINDS. FINAL BOUNDARY LOOKS TO CROSS THE CWA LATE TONIGHT...AND MAY CROSS ALONG THE DECOUPLED BL AND NOT MIS OUT UNTIL MORNING...ESPECIALLY ALONG THE COAST. IT SHOULD COME THROUGH WITHOUT MUCH IN THE WAY OF ANY SHRA. HOWEVER...BECAUSE IT MAY NOT MIX DOWN UNTIL DAYTIME HEATING BEGINS...MINS TONIGHT MAY ONLY DROP TO THE MID TO UPPER 60S ALONG THE ME COAST AND IN SRN NH...WITH SOME LIGHT FOG POSSIBLE IN SPOTS. FURTHER N...WILL SEE AIR DRY OUT AND MINS FALL INTO THE 50S. && .SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/... SFC HIGH BUILDS IN SUNDAY SHOULD BE A MAINLY SUNNY DAY WITH LOWER TDS...IN THE 40S N...AND 50S S. DOWNSLOPE WILL BRING TEMPS INTO THE UPPER 70S TO LOW 80S IN MANY SPOTS. SUNDAY NIGHT REMAINS CLEAR...AND WILL BE COOL...WITH LOWS GENERALLY IN THE 50S...AND SOME READINGS IN THE 40S IN THE MOUNTAINS. && .LONG TERM /MONDAY THROUGH SATURDAY/... A RIDGE OF HIGH PRESSURE WILL MAINTAIN DRY WEATHER THROUGH THE DAY MONDAY. WEAK LOW PRESSURE WILL MOVE NORTH ALONG THE COAST MONDAY NIGHT AND TUESDAY AND BRING A THREAT OF SHOWERS. BY TUESDAY NIGHT...A COLD FRONT WILL APPROACH FROM THE WEST AND BRING THE THREAT OF SHOWERS AND THUNDERSTORMS. THE FRONT WILL STALL OFF THE COAST. MODELS BEGIN TO DIVERGE WITH POSITION OF FRONT AND TIMING OF LOW PRESSURE SYSTEMS ALONG FRONT. HAVE KEPT CHANCE POPS IN FCST FOR MOST OF THE REMAINDER OF THE PERIOD...HOWEVER THE EXACT FRONTAL POSITION WILL GREATLY AFFECT PRECIP CHANCES AND TEMPS. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... SHORT TERM...SCT CONVECTION COULD PRODUCE STRONG GUSTY WINDS AND HEAVY RAIN THRU 22Z-00Z TODAY. THEN...MAINLY VFR THROUGH SUN NIGHT...EXCEPT FOR POSSIBLE VLY FOG TONIGHT...AND AGAIN SUN NIGHT. LONG TERM...VFR CONDITIONS MONDAY WITH MVFR CONDITIONS POSSIBLE MONDAY NIGHT AND TUESDAY IN SHOWERS WITH POSSIBLE THUNDERSTORMS TUESDAY NIGHT. VFR CONDITIONS WEDNESDAY AND THURSDAY WITH MVFR CONDITIONS POSSIBLE IN SHOWERS. && .MARINE... SHORT TERM...SCA HAS BEEN CANCELLED WITH SW WINDS 10 TO 20 KT SHIFTING TO N TONIGHT AND DIMINISHING...REMAINING BLO SCA LVLS THROUGH SUN NIGHT. SEAS OF 2 TO 4 FT THIS EVENING...WILL DIMINISH BEHIND THE WIND SHIFT. LONG TERM...WINDS AND SEAS BELOW SCA CRITERIA MONDAY THROUGH WEDNESDAY WITH SCA CRITERIA POSSIBLE LATE IN THE WEEK. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && SYNOPSIS... NEAR TERM...CEMPA SHORT TERM...CEMPA LONG TERM...JENSENIUS AVIATION...CEMPA/JENSENIUS MARINE...CEMPA/JENSENIUS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GRAY ME 309 PM EDT SAT JUL 20 2013 MEZ007>009-012>014-NHZ001-002-210115- NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD- SOUTHERN FRANKLIN-SOUTHERN SOMERSET-NORTHERN COOS-SOUTHERN COOS- 309 PM EDT SAT JUL 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE AND NORTHERN NEW HAMPSHIRE. .DAY ONE...THIS AFTERNOON AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE LIKELY THIS AFTERNOON. SOME THUNDERSTORMS COULD PRODUCE DAMAGING WINDS...SMALL HAIL AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE ENCOURAGED TO CALL WITH ANY REPORTS OF SEVERE WEATHER. ANZ150>154-210115- STONINGTON ME TO PORT CLYDE ME OUT TO 25 NM-PENOBSCOT BAY- PORT CLYDE ME TO CAPE ELIZABETH ME OUT TO 25 NM-CASCO BAY- CAPE ELIZABETH ME TO MERRIMACK RIVER MA OUT TO 25 NM- 309 PM EDT SAT JUL 20 2013 ...SEVERE THUNDERSTORM WATCH 426 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR CASCO BAY...PENOBSCOT BAY...THE COASTAL WATERS FROM CAPE ELIZABETH ME TO MERRIMACK RIVER MA...THE COASTAL WATERS FROM PORT CLYDE ME TO CAPE ELIZABETH ME AND THE COASTAL WATERS FROM STONINGTON ME TO PORT CLYDE ME. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MEZ018>028-NHZ003>010-013-014-210115- INTERIOR YORK-INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC- INTERIOR WALDO-COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN- KNOX-COASTAL WALDO-NORTHERN GRAFTON-NORTHERN CARROLL- SOUTHERN GRAFTON-SOUTHERN CARROLL-SULLIVAN-MERRIMACK-BELKNAP- STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM- 309 PM EDT SAT JUL 20 2013 ...SEVERE THUNDERSTORM WATCH 426 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW HAMPSHIRE...NORTHERN NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAY ME
201 PM EDT SAT JUL 20 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0955 PM TSTM WND DMG MADISON 44.80N 69.88W
07/19/2013 SOMERSET ME LAW ENFORCEMENT
MULTIPLE TREES DOWN IN MADISON REPORTED BY SHERIIFS
OFFICE
&&
CORRECTED EVENT TIME
EVENT NUMBER GYX1300247
MPKSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
204 PM EDT SAT JUL 20 2013
NHZ013-014-201830-
COASTAL ROCKINGHAM-INTERIOR ROCKINGHAM-
204 PM EDT SAT JUL 20 2013
...STRONG THUNDERSTORMS WILL IMPACT ROCKINGHAM COUNTY THROUGH 230 PM
EDT...
AT 204 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF STRONG THUNDERSTORM OVER SOUTHERN ROCKINGHAM COUNTY. THE
STRONGEST STORM WAS CENTERED 2 MILES SOUTHWEST OF NEWTON...OR ABOUT
8 MILES WEST OF NEWBURYPORT...MOVING EAST AT 40 MPH. THIS STRONG
THUNDERSTORM WILL AFFECT AREAS IN AND AROUND KINGSTON STATE
PARK...EAST HAMPSTEAD...PLAISTOW...KINGSTON...DANVILLE...
ATKINSON...NEWTON...EAST KINGSTON...SOUTH HAMPTON AND KENSINGTON
THROUGH 230 PM EDT.
GUSTY WINDS OF 35 TO 45 MPH CAN BE EXPECTED.
LAT...LON 4281 7111 4281 7116 4291 7119 4302 7073
4299 7074 4294 7078 4287 7082 4286 7086
4288 7092 4286 7097 4285 7103 4280 7107
KIMBLESPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GRAY ME 332 PM EDT SAT JUL 20 2013 NHZ002-003-202000- NORTHERN GRAFTON-SOUTHERN COOS- 332 PM EDT SAT JUL 20 2013 ...STRONG THUNDERSTORMS WILL IMPACT COOS COUNTY AND GRAFTON COUNTY THROUGH 400 PM EDT... AT 332 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 4 MILES WEST OF CARROLL...OR ABOUT 5 MILES NORTHEAST OF BETHLEHEM...MOVING EAST AT 40 MPH. THIS STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND FOREST LAKE STATE PARK...WHITEFIELD...BETHLEHEM...TWIN MOUNTAIN...CARROLL... JEFFERSON...RANDOLPH...MOUNT WASHINGTON...MOOSE BROOK STATE PARK AND SHELBURNE THROUGH 400 PM EDT. GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED. LAT...LON 4443 7117 4425 7118 4426 7172 4442 7169 KIMBLE
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
346 PM EDT SAT JUL 20 2013
MEZ022-202015-
INTERIOR WALDO-
346 PM EDT SAT JUL 20 2013
...STRONG THUNDERSTORMS WILL IMPACT WALDO COUNTY THROUGH 415 PM
EDT...
AT 346 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED OVER BROOKS...OR ABOUT 7 MILES EAST OF
THORNDIKE...MOVING NORTHEAST AT 20 MPH. THIS STRONG THUNDERSTORM WILL
AFFECT AREAS IN AND AROUND BROOKS...JACKSON...SWAN LAKE STATE PARK...
MONROE...WINTERPORT AND FRANKFORT THROUGH 415 PM EDT.
GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED.
LAT...LON 4463 6883 4460 6883 4449 6916 4457 6926
4466 6914 4470 6886 4470 6884 4468 6881
4467 6881
KIMBLESPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
405 PM EDT SAT JUL 20 2013
MEZ008-009-012>014-020>022-202045-
ANDROSCOGGIN-CENTRAL SOMERSET-INTERIOR WALDO-KENNEBEC-NORTHERN
FRANKLIN-SOUTHERN FRANKLIN-SOUTHERN OXFORD-SOUTHERN SOMERSET-
405 PM EDT SAT JUL 20 2013
...STRONG THUNDERSTORMS WILL IMPACT ANDROSCOGGIN COUNTY...SOMERSET
COUNTY...OXFORD COUNTY...FRANKLIN COUNTY...WALDO COUNTY AND KENNEBEC
COUNTY THROUGH 445 PM EDT...
AT 406 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED ALONG A LINE EXTENDING FROM NEW PORTLAND
TO TEMPLE TO 3 MILES NORTHWEST OF CANTON...OR ALONG A LINE EXTENDING
FROM 16 MILES NORTH OF FARMINGTON TO 3 MILES WEST OF FARMINGTON TO 11
MILES SOUTHEAST OF RUMFORD...MOVING EAST AT 60 MPH. THIS STRONG
THUNDERSTORM WILL AFFECT AREAS IN AND AROUND EAST WILTON...WILTON...
TEMPLE...SUMNER...STRONG...PERU...NEW VINEYARD...NEW PORTLAND...
KINGFIELD AND FARMINGTON THROUGH 445 PM EDT.
HEAVY RAINFALL CAN BE EXPECTED...WITH LOCAL PONDING IN STREETS AND
LOW-LYING AREAS.
IF YOU ARE OUTDOORS AND STORMS APPROACH YOUR LOCATION...MOVE INDOORS
OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE MORE THAN 5
MILES AWAY FROM THE PARENT THUNDERSTORM.
LAT...LON 4440 6932 4438 7051 4467 7029 4499 7016
4500 6932 4474 6926 4473 6921 4472 6919
4465 6918 4466 6914 4465 6913
MPKPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE GRAY ME
409 PM EDT SAT JUL 20 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0935 PM TSTM WND DMG MADISON 44.80N 69.88W
07/19/2013 SOMERSET ME LAW ENFORCEMENT
MULTIPLE TREES DOWN IN MADISON REPORTED BY SHERIIFS
OFFICE
&&
CORRECTED EVENT TIME
EVENT NUMBER GYX1300247
BROWNThe Portland,ME radar (KGYX), 83 km away, was scanning. The volume nearest the first event began at 20:38 UTC.
6 thunderstorm wind. Local standard time, as filed.
A severe thunderstorm downed trees and wires near New Sharon.
A severe thunderstorm downed trees in Sidney.
A severe thunderstorm downed trees near Palermo.
A severe thunderstorm downed trees in Freedom.
A severe thunderstorm downed trees in Brooks, Freedom, Palermo, Stockton and Belfast.
A severe thunderstorm downed a tree on Field Road in Searsport.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Maine in 2013Every state in 2013This day in weather historyWarnings in Maine, July 2013
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: 469526, 469516, 469523, 469524, 469521, 469519.