Severe Thunderstorm Warning 128, NWS Gray, ME

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
1027 AM EDT FRI AUG 19 2011

.SYNOPSIS...
A SOUTHERLY FLOW WILL CONTINUE TO BRING MORE HUMID AIR INTO
NORTHERN NEW ENGLAND WITH THE POSSIBILITY OF AFTERNOON AND EVENING
SHOWERS AND THUNDERSTORMS DAILY THROUGH THE WEEKEND. A COLD FRONT
WILL PUSH THROUGH THE AREA ON MONDAY...PROVIDING A BETTER CHANCE
FOR SHOWERS AND STORMS. DRIER AND COOLER AIR MOVE IN BEHIND THE
COLD FRONT TUESDAY AND WEDNESDAY.

&&

.NEAR TERM /THROUGH TONIGHT/...
1425 UTC UPDATE...MADE SOME TWEAKS TO TEMPERATURES AND
WINDS...OTHERWISE NO CHANGES TO GENERAL GIST OF FORECAST. MAIN
CONCERN IS DEVELOPMENT OF ANY CONVECTION THIS AFTERNOON...COVERAGE
AND INTENSITY. NO REAL SHEAR TO WORK WITH TODAY TO KEEP STORMS
LONG-LIVED...BUT ENOUGH INSTABILITY TO GENERATE CONVECTION.

1106 UTC...UPDATE TO INPUT LATEST OBS DATA...NO OTHER CHANGES
NEEDED ATTM.

PREV DISC;
CONTINUED SOUTHERLY FLOW KEEPS HUMIDITY IN PLACE WITH
CONTINUED INSTABILITY ALOFT. A SHORTWAVE TROUGH WILL MOVE ACROSS
THE AREA TODAY AND MAY PROVIDE ENOUGH LIFT TO GENERATE SCATTERED
SHOWERS AND THUNDERSTORMS ACROSS THE AREA TODAY..MAINLY IN THE
AFTN. TEMPERATURES WILL BE IN THE 80S...USED A BLEND OF MAV/MET
TEMPS. WILL SEE MOST OF THE CONVECTIVE ACTIVITY DIE DOWN IN THE
EVENING AS THE SHORT WAVE EXITS THE REGION.

&&

.SHORT TERM /SATURDAY/...
THE SHORT WAVE EXITS THE REGION BY EARLY EVENING FOLLOWED BY
RIDGING AT THE SURFACE AND ALOFT TO BUILD ACROSS THE AREA TONIGHT
AND THROUGH SATURDAY. DURING SATURDAY AFTERNOON A FEW AIR MASS
TSTMS MAY DEVELOP AS WARMER TEMPS AND HIGHER DEWPOINTS MOVE INTO
THE AREA.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
ANY WDLY SCT DIURNAL SHOWERS AND TSTMS SHOULD DISSIPATE SATURDAY
EVENING ALLOWING FOR FAIR AND PERHAPS MUGGY CONDITIONS SATURDAY
NIGHT.

STRONG SHORT WAVE TROUGH WILL APPROACH FROM THE WEST ON SUNDAY.
THIS WILL HELP DRIVE A SFC COLD FRONT ACROSS THE REGION BY LATE
SUNDAY NIGHT OR EARLY MONDAY MORNING. SHOWERS AND THUNDERSTORMS
LOOK TO BE PLENTIFUL JUST AHEAD OF AND ALONG THE FRONT...STARTING
SUNDAY AFTERNOON. HIGHEST POPS SUNDAY NIGHT BEFORE SHIFTING
OFFSHORE BY EARLY MONDAY MORNING. GIVEN POTENTIALLY STRONG
DYNAMICS INVOLVED WITH SHORT WAVE TROUGH...A SEVERE WEATHER EVENT
WILL BE POSSIBLE SUNDAY AFTERNOON IF TIMING AND THERMODYNAMICS
WORK OUT. SOMETHING TO KEEP AN EYE ON. WE LIKE ECMWF FOR TIMING OF
SYSTEM.

MAINLY AIR WEATHER IS THEN EXPECTED INTO MIDWEEK BEFORE NEXT
POTENTIAL SYSTEM MOVES IN LATE IN THE WEEK.

&&

.AVIATION /15Z FRIDAY THROUGH TUESDAY/...
SHORT TERM /THROUGH FRIDAY NIGHT/...VFR CONDITIONS EXPECTED
THROUGH SATURDAY. SCATTERED AFTN TSTMS COULD BRIEFLY LWR CONDS TO
MVFR OR IFR. COULD ALSO BE SOME F FORMING AGAIN TONIGHT AND THEN
BURNING OFF SAT MORNING.

LONG TERM...POTENTIAL FOR LOCAL IFR CONDITIONS SATURDAY NIGHT AND
SUNDAY MORNING IF STRATUS MATERIALIZES IN MOIST SOUTHERLY FLOW.
IFR CONDITIONS ARE THEN EXPECTED TO DEVELOP BY SUNDAY NIGHT IN
SHOWERS AND THUNDERSTORMS...WHICH SHOULD THEN EXIT BY 12Z MON.

&&

.MARINE...
SHORT TERM /TONIGHT THROUGH FRIDAY NIGHT/...WINDS AND SEAS TO
REMAIN BELOW SCA CRITERIA.

LONG TERM...SCA CONDITIONS WILL BE POSSIBLE IN SOUTHERLY FLOW
AHEAD OF COLD FRONT LATER SUNDAY AFTERNOON AND SUNDAY NIGHT. HAVE
INCLUDED 25 TO 30 KT GUSTS IN THE GRIDS DURING THIS TIME FRAME AND
HIGHER SEAS.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...NONE.

&&

NEAR TERM...STJEAN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GRAY ME
329 PM EDT FRI AUG 19 2011

MEZ007>009-012>014-018>028-NHZ001>010-013-014-201000-
NORTHERN OXFORD-NORTHERN FRANKLIN-CENTRAL SOMERSET-SOUTHERN OXFORD-
SOUTHERN FRANKLIN-SOUTHERN SOMERSET-INTERIOR YORK-
INTERIOR CUMBERLAND-ANDROSCOGGIN-KENNEBEC-INTERIOR WALDO-
COASTAL YORK-COASTAL CUMBERLAND-SAGADAHOC-LINCOLN-KNOX-COASTAL WALDO-
NORTHERN COOS-SOUTHERN COOS-NORTHERN GRAFTON-NORTHERN CARROLL-
SOUTHERN GRAFTON-SOUTHERN CARROLL-SULLIVAN-MERRIMACK-BELKNAP-
STRAFFORD-INTERIOR ROCKINGHAM-COASTAL ROCKINGHAM-
329 PM EDT FRI AUG 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MAINE...CENTRAL NEW
HAMPSHIRE...NORTHERN NEW HAMPSHIRE AND SOUTHEASTERN NEW HAMPSHIRE.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FEW THUNDERSTORMS COULD PRODUCE SMALL HAIL AND TORRENTIAL
DOWNPOURS THROUGH EARLY THIS EVENING.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ150>154-201000-
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-
329 PM EDT FRI AUG 19 2011

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.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
320 PM EDT FRI AUG 19 2011

NHZ013-191945-
INTERIOR ROCKINGHAM-
320 PM EDT FRI AUG 19 2011

...STRONG THUNDERSTORMS WILL IMPACT ROCKINGHAM COUNTY THROUGH 345 PM
EDT...

AT 320 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 6 MILES SOUTHWEST OF AUBURN...OR ABOUT 4
MILES SOUTHEAST OF MANCHESTER...MOVING NORTHEAST AT 15 MPH. THIS
STRONG THUNDERSTORM WILL AFFECT AREAS IN AND AROUND AUBURN AND
CHESTER THROUGH 345 PM EDT.

HAIL UP TO THREE QUARTER INCH IN DIAMETER...HEAVY DOWNPOURS...
EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH
CAN BE EXPECTED.

HEAVY RAIN MAY PRODUCE LOCALIZED DRAINAGE FLOODING AND PONDING OF
WATER.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4291 7146 4294 7144 4295 7139 4300 7140
      4303 7140 4308 7135 4301 7126 4292 7122
      4287 7140

ES

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
342 PM EDT FRI AUG 19 2011

MEZ018-NHZ006-010-192030-
INTERIOR YORK-SOUTHERN CARROLL-STRAFFORD-
342 PM EDT FRI AUG 19 2011

...STRONG THUNDERSTORMS WILL IMPACT STRAFFORD COUNTY...CARROLL COUNTY
AND YORK COUNTY THROUGH 430 PM EDT...

AT 342 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 5 MILES SOUTH OF WAKEFIELD...OR ABOUT 13
MILES WEST OF SANFORD...MOVING NORTHEAST AT 15 MPH. THIS STRONG
THUNDERSTORM WILL AFFECT AREAS IN AND AROUND WAKEFIELD...ACTON...
SHAPLEIGH AND WEST NEWFIELD THROUGH 430 PM EDT.

HAIL UP TO THREE QUARTER INCH IN DIAMETER...HEAVY DOWNPOURS...
EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH
CAN BE EXPECTED.

HEAVY RAIN MAY PRODUCE LOCALIZED DRAINAGE FLOODING AND PONDING OF
WATER.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4368 7088 4355 7074 4343 7100 4353 7108

ES

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GRAY ME
346 PM EDT FRI AUG 19 2011

MEZ012-013-020-021-192030-
ANDROSCOGGIN-KENNEBEC-SOUTHERN FRANKLIN-SOUTHERN OXFORD-
346 PM EDT FRI AUG 19 2011

...STRONG THUNDERSTORMS WILL IMPACT ANDROSCOGGIN COUNTY...KENNEBEC
COUNTY...OXFORD COUNTY AND FRANKLIN COUNTY THROUGH 430 PM EDT...

AT 346 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
CLUSTER OF STRONG THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM
5 MILES NORTHWEST OF FAYETTE TO 2 MILES NORTHWEST OF MECHANIC
FALLS...OR ALONG A LINE EXTENDING FROM 15 MILES NORTHEAST OF TURNER
TO 2 MILES NORTHWEST OF MECHANIC FALLS...MOVING EAST AT 15 MPH. THIS
CLUSTER OF STRONG THUNDERSTORMS WILL AFFECT AREAS IN AND AROUND
LIVERMORE...MECHANIC FALLS...TURNER...MOUNT VERNON...FAYETTE...
WAYNE...LEEDS...FAYETTE...WAYNE AND READFIELD THROUGH 430 PM EDT.

HAIL UP TO THREE QUARTER INCH IN DIAMETER...HEAVY DOWNPOURS...
EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH
CAN BE EXPECTED.

HEAVY RAIN MAY PRODUCE LOCALIZED DRAINAGE FLOODING AND PONDING OF
WATER.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4451 6978 4407 7008 4411 7043 4450 7012

ES

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GRAY ME
353 PM EDT FRI AUG 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0337 PM     HAIL             AUBURN                  43.00N  71.35W
08/19/2011  E0.88 INCH       ROCKINGHAM         NH   PUBLIC

            NICKEL SIZED HAIL IN AUBURN.

&&

EVENT NUMBER GYX1100354

DS