291
FNUS51 KGYX 181908
FWFGYX
FIRE WEATHER PLANNING FORECAST FOR WESTERN MAINE AND NEW HAMPSHIRE
NATIONAL WEATHER SERVICE GRAY ME
308 PM EDT MON MAY 18 2026
DISCUSSION
TUESDAY AND WEDNESDAY WILL BE HOT AND BREEZY WITH TEMPERATURES
WELL INTO THE 80S AND INTO LOW 90S IN SOUTHERN NH ON TUESDAY.
DEWPOINTS WILL BE ON THE INCREASE THAT WILL HELP KEEP MIN RH IN
THE 30 TO 50 PERCENT RANGE. WEST TO SOUTHWEST WINDS WILL GUST 25
TO 30 MPH BOTH DAYS. A SLOW MOVING COLD FRONT WILL BRING CHANCES
FOR WIDELY SCATTERED THUNDERSTORMS TUESDAY AND ADDITIONAL CHANCES
WEDNESDAY WHEN THE FRONT CROSSES. COOLER AND DRIER CONDITIONS
WILL FOLLOW THE FRONT FOR THURSDAY AND FRIDAY.
MEZ104-190830-
WESTERN MAINE MOUNTAINS AND FOOTHILLS-
INCLUDING THE CITIES OF FARMINGTON, RUMFORD, BETHEL, EUSTIS,
JACKMAN, AND CARRABASSETT VALLEY
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS SHOWERS
CHANCE OF THUNDER (%) 3 27(ELEV) 20(LTD) 10
CHANCE PRECIP (%) 0 50 30 30
TEMP (24H TREND) 47 (+5) 85 (+20) 59 80
RH % (24H TREND) 92 (+9) 45 (-4) 89 37
20FTWND - AM(MPH) SW 12 G34 W 19 G37
20FTWND - PM(MPH) S 9 G23 W 13 G35 W 12 G32 W 20 G41
PRECIP AMOUNT 0.00 0.03 0.01 0.00
PRECIP DURATION 2 1 1
PRECIP BEGIN 8 AM CONTINUING 6 AM
PRECIP END CONTINUING 4 AM 4 PM
MIXING HGT(FT-AGL) 5820(UNST) 5360(UNST)
TRANSPORT WND (MPH) W 25 W 28
VENT RATE (KT-FT) 128040 128640
CWR 0 10 10
KBDI <200 <200 <200 <200
REMARKS...NONE.
MEZ107-190830-
KENNEBEC RIVER VALLEY-
INCLUDING THE CITIES OF AUGUSTA, WATERVILLE, SKOWHEGAN, AUBURN,
LEWISTON, LIBERTY, AND LIVERMORE
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS TSTMS
CHANCE OF THUNDER (%) 3 21(LTD) 18(LTD) 15(LTD)
CHANCE PRECIP (%) 0 30 20 30
TEMP (24H TREND) 48 (+1) 89 (+23) 67 86
RH % (24H TREND) 88 (+1) 41 (-1) 74 37
20FTWND - AM(MPH) SW 6 SW 13 G26
20FTWND - PM(MPH) S 9 G19 W 11 G23 SW 9 G19 W 16 G29
PRECIP AMOUNT 0.00 0.03 0.01 0.00
PRECIP DURATION 1 0 1
PRECIP BEGIN 12 PM CONTINUING 10 AM
PRECIP END CONTINUING 3 AM 6 PM
MIXING HGT(FT-AGL) 6170(UNST) 5300(UNST)
TRANSPORT WND (MPH) W 22 W 22
VENT RATE (KT-FT) 117230 100700
CWR 0 10 10
KBDI <200 <200 <200 <200
REMARKS...NONE.
MEZ109-190830-
LAKES REGION-
INCLUDING THE CITIES OF SANFORD, NORTH WINDHAM, GRAY,
NEW GLOUCESER, FRYEBURG, SOUTH PARIS, AND HIRAM
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS TSTMS
CHANCE OF THUNDER (%) 3 15(LTD) 19(LTD) 16(LTD)
CHANCE PRECIP (%) 0 30 20 30
TEMP (24H TREND) 47 (-4) 90 (+22) 67 86
RH % (24H TREND) 91 (+4) 37 (-8) 70 37
20FTWND - AM(MPH) SW 10 G19 W 14 G28
20FTWND - PM(MPH) SE 8 G17 W 13 G26 SW 11 G21 W 16 G29
PRECIP AMOUNT 0.00 0.01 0.01 0.00
PRECIP DURATION 1 0 1
PRECIP BEGIN 2 PM CONTINUING 11 AM
PRECIP END CONTINUING 9 PM 6 PM
MIXING HGT(FT-AGL) 6940(UNST) 5920(UNST)
TRANSPORT WND (MPH) W 25 W 26
VENT RATE (KT-FT) 152680 136160
CWR 0
KBDI <200 <200 <200 <200
REMARKS...NONE.
MEZ110-190830-
BEACHES AND CASCO BAY-
INCLUDING THE CITIES OF KITTERY, YORK, KENNEBUNK, SCARBOROUGH,
PORTLAND, YARMOUTH, FREEPORT, BRUNSWICK, TOPSHAM,
BOOTHBAY HARBOR, AND DAMARISCOTTA
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY MCLEAR PCLDY
PRECIP TYPE NONE SHOWERS TSTMS TSTMS
CHANCE OF THUNDER (%) 3 13 18(LTD) 16(LTD)
CHANCE PRECIP (%) 0 20 20 30
TEMP (24H TREND) 46 (-6) 89 (+24) 63 86
RH % (24H TREND) 96 (+12) 40 (-10) 77 40
20FTWND - AM(MPH) SW 8 G17 SW 12 G25
20FTWND - PM(MPH) SE 5 SW 11 G23 SW 8 G17 W 13 G26
PRECIP AMOUNT 0.00 0.01 0.01 0.00
PRECIP DURATION 0 0 1
PRECIP BEGIN 3 PM CONTINUING 12 PM
PRECIP END CONTINUING 9 PM 6 PM
MIXING HGT(FT-AGL) 5540(UNST) 5520(UNST)
TRANSPORT WND (MPH) SW 18 W 23
VENT RATE (KT-FT) 88640 110400
CWR 0
KBDI <200 <200 <200 <200
REMARKS...NONE.
MEZ111-190830-
MID-COAST-
INCLUDING THE CITIES OF WALDOBORO, ROCKLAND, CAMDEN,
LINCOLNVILLE, BELFAST, SEARSPORT, ISLESBORO, AND VINALHAVEN
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS TSTMS
CHANCE OF THUNDER (%) 3 17(LTD) 18(LTD) 15(LTD)
CHANCE PRECIP (%) 0 30 20 30
TEMP (24H TREND) 46 (-3) 88 (+26) 62 87
RH % (24H TREND) 96 (+16) 43 (-5) 83 43
20FTWND - AM(MPH) SW 6 G17 SW 12 G25
20FTWND - PM(MPH) S 5 SW 10 G21 SW 8 G19 W 13 G26
PRECIP AMOUNT 0.00 0.03 0.02 0.00
PRECIP DURATION 1 0 1
PRECIP BEGIN 12 PM CONTINUING 10 AM
PRECIP END CONTINUING 9 PM 6 PM
MIXING HGT(FT-AGL) 3910(UNST) 4680(UNST)
TRANSPORT WND (MPH) SW 18 W 21
VENT RATE (KT-FT) 62560 84240
CWR 0 20 20
KBDI <200 <200 <200 <200
REMARKS...NONE.
NHZ021-190830-
COOS COUNTY-
INCLUDING THE CITIES OF ERROL, MILLSFIELD, COLEBROOK, BERLIN,
DUMMER, MILAN, YORK POND, AND LANCASTER
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS TSTMS
CHANCE OF THUNDER (%) 4 25(ELEV) 20(LTD) 14
CHANCE PRECIP (%) 0 50 30 50
TEMP (24H TREND) 53 (+11) 82 (+12) 59 75
RH % (24H TREND) 91 (+4) 48 (-6) 88 42
20FTWND - AM(MPH) SW 14 G44 W 18 G42
20FTWND - PM(MPH) S 9 G32 W 16 G44 W 13 G37 W 20 G42
PRECIP AMOUNT 0.00 0.05 0.02 0.05
PRECIP DURATION 2 1 2
PRECIP BEGIN 8 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 5 PM
MIXING HGT(FT-AGL) 4970(UNST) 5130(UNST)
TRANSPORT WND (MPH) W 25 W 25
VENT RATE (KT-FT) 109340 112860
CWR 0 20 20 10
KBDI <200 <200 <200 <200
REMARKS...NONE.
NHZ022-190830-
WHITE MOUNTIANS-
INCLUDING THE CITIES OF LINCOLN, LITTLETON, THORNTON,
WATERVILLE VALLEY, WOODSTOCK, JACKSON, NORTH CONWAY, CONWAY,
AND CRAWFORD NOTCH
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS NONE TSTMS
CHANCE OF THUNDER (%) 3 19(LTD) 20(LTD) 18(LTD)
CHANCE PRECIP (%) 0 30 0 50
TEMP (24H TREND) 52 (+4) 87 (+15) 62 81
RH % (24H TREND) 92 (+8) 40 (-7) 84 39
20FTWND - AM(MPH) SW 12 G42 W 17 G37
20FTWND - PM(MPH) S 8 G27 W 14 G43 W 12 G36 W 16 G37
PRECIP AMOUNT 0.00 0.05 0.00 0.05
PRECIP DURATION 1 2
PRECIP BEGIN 12 PM 6 AM
PRECIP END 6 PM 6 PM
MIXING HGT(FT-AGL) 5730(UNST) 4800(UNST)
TRANSPORT WND (MPH) W 23 W 24
VENT RATE (KT-FT) 114600 100800
CWR 0 20 0 20
KBDI <200 <200 <200 <200
REMARKS...NONE.
NHZ023-190830-
CENTRAL LAKES-
INCLUDING THE CITIES OF LEBANON, PLYMOUTH, LACONIA, WOLFEBORO,
ALTON, AND OSSIPEE
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS NONE TSTMS
CHANCE OF THUNDER (%) 3 16(LTD) 20(LTD) 17(LTD)
CHANCE PRECIP (%) 0 30 0 40
TEMP (24H TREND) 51 (0) 90 (+14) 65 84
RH % (24H TREND) 89 (+6) 34 (-8) 75 38
20FTWND - AM(MPH) SW 11 G23 W 16 G32
20FTWND - PM(MPH) SE 6 W 14 G28 SW 11 G25 W 16 G29
PRECIP AMOUNT 0.00 0.03 0.00 0.01
PRECIP DURATION 1 2
PRECIP BEGIN 1 PM 9 AM
PRECIP END 6 PM 6 PM
MIXING HGT(FT-AGL) 7030(UNST) 5160(UNST)
TRANSPORT WND (MPH) W 25 W 26
VENT RATE (KT-FT) 154660 118680
CWR 0 10 0
KBDI <200 <200 <200 <200
REMARKS...NONE.
NHZ024-190830-
LAKE SUNAPEE AND MONADNOCKS-
INCLUDING THE CITIES OF CLAREMONT, KEENE, AND JAFFREY
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE NONE TSTMS NONE TSTMS
CHANCE OF THUNDER (%) 3 16(LTD) 19(LTD) 18(LTD)
CHANCE PRECIP (%) 0 30 0 40
TEMP (24H TREND) 58 (+5) 91 (+9) 65 84
RH % (24H TREND) 88 (+1) 34 (-8) 74 39
20FTWND - AM(MPH) SW 9 G19 W 12 G25
20FTWND - PM(MPH) S 6 W 11 G23 SW 9 G21 W 13 G26
PRECIP AMOUNT 0.00 0.02 0.00 0.00
PRECIP DURATION 1 2
PRECIP BEGIN 2 PM 9 AM
PRECIP END 6 PM 6 PM
MIXING HGT(FT-AGL) 7140(UNST) 5150(UNST)
TRANSPORT WND (MPH) W 25 W 26
VENT RATE (KT-FT) 157080 118450
CWR 0 0
KBDI <200 <200 <200 <200
REMARKS...NONE.
NHZ025-190830-
MERRIMACK VALLEY-
INCLUDING THE CITIES OF MANCHESTER, NASHUA, WEARE, AND DERRY
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE NONE SHOWERS TSTMS TSTMS
CHANCE OF THUNDER (%) 2 16(LTD) 19(LTD) 17(LTD)
CHANCE PRECIP (%) 0 20 20 50
TEMP (24H TREND) 54 (-1) 93 (+17) 68 88
RH % (24H TREND) 90 (+4) 31 (-9) 66 38
20FTWND - AM(MPH) SW 10 G19 W 13 G26
20FTWND - PM(MPH) SE 6 W 13 G26 SW 10 G21 W 16 G29
PRECIP AMOUNT 0.00 0.00 0.00 0.00
PRECIP DURATION 0 0 1
PRECIP BEGIN 4 PM CONTINUING 11 AM
PRECIP END CONTINUING 8 PM 6 PM
MIXING HGT(FT-AGL) 7880(UNST) 6200(UNST)
TRANSPORT WND (MPH) W 25 W 28
VENT RATE (KT-FT) 173360 148800
CWR 0
KBDI <200 <200 <200 <200
REMARKS...NONE.
NHZ026-190830-
SEACOAST-
INCLUDING THE CITIES OF PORTSMOUTH, DOVER, HAMPTON, AND EXETER
308 PM EDT MON MAY 18 2026
TONIGHT TUE TUE NIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS TSTMS
CHANCE OF THUNDER (%) 2 14 18(LTD) 16(LTD)
CHANCE PRECIP (%) 0 0 20 50
TEMP (24H TREND) 52 (-3) 92 (+24) 68 87
RH % (24H TREND) 94 (+8) 33 (-15) 67 39
20FTWND - AM(MPH) SW 8 G17 W 12 G25
20FTWND - PM(MPH) E 5 W 12 G23 SW 9 G17 W 14 G28
PRECIP AMOUNT 0.00 0.00 0.00 0.01
PRECIP DURATION 0 1
PRECIP BEGIN 6 PM 12 PM
PRECIP END 9 PM 6 PM
MIXING HGT(FT-AGL) 7810(UNST) 6470(UNST)
TRANSPORT WND (MPH) W 23 W 28
VENT RATE (KT-FT) 156200 155280
CWR 0 0
KBDI <200 <200 <200 <200
REMARKS...NONE.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 40S.
NORTHWEST WINDS 10 TO 15 MPH.
THURSDAY
SUNNY. HIGHS AROUND 60. NORTHWEST WINDS 10 TO 15 MPH.
DAYTIME HUMIDITY VALUES MODERATE.
THURSDAY NIGHT
MOSTLY CLEAR. LOWS IN THE UPPER 30S. NORTHWEST
WINDS 5 TO 10 MPH.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE MID 60S. WEST WINDS 10 TO
15 MPH. DAYTIME HUMIDITY VALUES MODERATE.
FRIDAY NIGHT
MOSTLY CLOUDY. LOWS IN THE LOWER 40S. WEST WINDS
5 TO 10 MPH.
SATURDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 60S. SOUTHEAST WINDS AROUND 5 MPH. DAYTIME HUMIDITY VALUES
MODERATE.
SATURDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE LOWER 40S. SOUTHEAST WINDS AROUND 5 MPH.
SUNDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 60S. SOUTHEAST WINDS AROUND 5 MPH. DAYTIME HUMIDITY VALUES
MODERATE.
SUNDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE MID 40S. SOUTHEAST WINDS AROUND 5 MPH.
MONDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE
LOWER 60S. SOUTHEAST WINDS AROUND 5 MPH. DAYTIME HUMIDITY VALUES
MODERATE.
OUTLOOK 8 TO 14 DAYS
TEMPERATURES ABOVE NORMAL. PRECIPITATION NEAR NORMAL.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page