552
FNUS54 KHGX 181138
FWFHGX
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST TEXAS
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
638 AM CDT MON MAY 18 2026
DISCUSSION
GUSTY SOUTHEAST WINDS IN THE 15 TO 25 MPH RANGE ARE EXPECTED FOR
MOST OF THE REGION THROUGH THIS AFTERNOON. MINIMUM AFTERNOON RH
VALUES ARE EXPECTED TO BE IN THE 50 TO 70 PERCENT RANGE THROUGHOUT
MOST OF THE WEEK. ISOLATED TO WIDELY SCATTERED SHOWERS AND STORMS
POSSIBLE THROUGHOUT THE DAY, FOLLOWED BY HIGHER CHANCES OF
SHOWERS AND STORMS TUESDAY AND BEYOND.
TXZ163-164-182115-
HOUSTON-TRINITY-
INCLUDING THE CITIES OF CROCKETT, GROVETON, AND TRINITY
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 20 20 50
CHANCE OF THUNDER (%) 20 20 50
TEMP (24H TREND) 88 (0) 75 (-2) 90
RH % (24H TREND) 58 (-3) 91 (+4) 56
WIND 20FT/EARLY(MPH) S 9 G22 SE 7 G19 S 6
WIND 20FT/LATE(MPH) S 11 G22 S 5 S 7
MAX/MIN MIX HGT(M) 1450 1860
MAX/MIN MIX HGT(FT) 4760 6090
TRANSPORT WND (KTS) S 21 S 14
TRANSPORT WND (M/S) S 11 S 7
VENT RATE (M/S-M) 15950 13020
CATEGORY DAY 4 4
SUNSHINE HOURS 5 4
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ176-195>198-182115-
BRAZOS-BURLESON-GRIMES-MADISON-WASHINGTON-
INCLUDING THE CITIES OF BRENHAM, BRYAN, CALDWELL,
COLLEGE STATION, MADISONVILLE, NAVASOTA, AND SOMERVILLE
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 20 60
CHANCE OF THUNDER (%) 0 20 50
TEMP (24H TREND) 89 (0) 76 (-1) 89
RH % (24H TREND) 59 (-1) 88 (+1) 58
WIND 20FT/EARLY(MPH) S 14 G23 SE 11 G20 S 10 G18
WIND 20FT/LATE(MPH) S 16 G23 S 9 G17 SE 11 G18
MAX/MIN MIX HGT(M) 1500 1930
MAX/MIN MIX HGT(FT) 4920 6330
TRANSPORT WND (KTS) S 21 S 15
TRANSPORT WND (M/S) S 11 S 8
VENT RATE (M/S-M) 16500 15440
CATEGORY DAY 5 4
SUNSHINE HOURS 5 4
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ177>179-199-200-182115-
MONTGOMERY-NORTHERN LIBERTY-POLK-SAN JACINTO-WALKER-
INCLUDING THE CITIES OF CLEVELAND, COLDSPRING, CONROE, CORRIGAN,
DAYTON, HUNTSVILLE, LIBERTY, LIVINGSTON, SHEPHERD,
AND THE WOODLANDS
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 20 0 40
CHANCE OF THUNDER (%) 20 0 40
TEMP (24H TREND) 90 (+1) 76 (-1) 90
RH % (24H TREND) 60 (-4) 89 (+3) 57
WIND 20FT/EARLY(MPH) S 10 G22 SE 8 G20 SE 7
WIND 20FT/LATE(MPH) S 12 G23 SE 6 SE 8 G17
MAX/MIN MIX HGT(M) 1400 1840
MAX/MIN MIX HGT(FT) 4590 6030
TRANSPORT WND (KTS) S 21 S 14
TRANSPORT WND (M/S) S 11 S 7
VENT RATE (M/S-M) 15400 12880
CATEGORY DAY 4 4
SUNSHINE HOURS 4 4
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ212-213-227-237-238-182115-
FORT BEND-INLAND BRAZORIA-INLAND GALVESTON-INLAND HARRIS-WALLER-
INCLUDING THE CITIES OF ALVIN, ANGLETON, BROOKSHIRE,
FIRST COLONY, FRIENDSWOOD, HEMPSTEAD, HOUSTON, LEAGUE CITY,
MISSION BEND, MISSOURI CITY, PEARLAND, PECAN GROVE, PRAIRIE VIEW,
ROSENBERG, SUGAR LAND, AND WALLER
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 40
CHANCE OF THUNDER (%) 0 0 40
TEMP (24H TREND) 90 (+1) 78 (-1) 90
RH % (24H TREND) 60 (-4) 88 (+1) 59
WIND 20FT/EARLY(MPH) SE 14 G24 SE 11 G20 SE 10 G18
WIND 20FT/LATE(MPH) SE 16 G24 SE 9 G18 SE 12
MAX/MIN MIX HGT(M) 1360 1900
MAX/MIN MIX HGT(FT) 4450 6220
TRANSPORT WND (KTS) S 19 S 15
TRANSPORT WND (M/S) S 10 S 8
VENT RATE (M/S-M) 13600 15200
CATEGORY DAY 4 4
SUNSHINE HOURS 3 4
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ210-211-226-235-236-182115-
AUSTIN-COLORADO-INLAND JACKSON-INLAND MATAGORDA-WHARTON-
INCLUDING THE CITIES OF BAY CITY, BELLVILLE, COLUMBUS,
EAGLE LAKE, EDNA, EL CAMPO, GANADO, SEALY, WEIMAR, AND WHARTON
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 30
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 90 (+1) 77 (-1) 90
RH % (24H TREND) 58 (-5) 87 (-1) 56
WIND 20FT/EARLY(MPH) SE 15 G25 SE 13 G23 SE 11 G20
WIND 20FT/LATE(MPH) SE 17 G25 SE 10 G19 SE 13
MAX/MIN MIX HGT(M) 1320 1970
MAX/MIN MIX HGT(FT) 4320 6480
TRANSPORT WND (KTS) S 21 S 16
TRANSPORT WND (M/S) S 11 S 8
VENT RATE (M/S-M) 14520 15760
CATEGORY DAY 4 4
SUNSHINE HOURS 3 4
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ214-300-313-338-182115-
CHAMBERS-COASTAL GALVESTON-COASTAL HARRIS-SOUTHERN LIBERTY-
INCLUDING THE CITIES OF ANAHUAC, BAYTOWN, DEVERS, DICKINSON,
LA MARQUE, MONT BELVIEU, OLD RIVER-WINFREE, PASADENA, STOWELL,
TEXAS CITY, AND WINNIE
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 20 0 20
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 87 (+1) 77 (-2) 88
RH % (24H TREND) 69 (-4) 90 (+1) 66
WIND 20FT/EARLY(MPH) SE 14 SE 12 G19 SE 11
WIND 20FT/LATE(MPH) SE 15 SE 9 G17 SE 12
MAX/MIN MIX HGT(M) 1060 1150
MAX/MIN MIX HGT(FT) 3470 3760
TRANSPORT WND (KTS) S 22 S 15
TRANSPORT WND (M/S) S 11 S 8
VENT RATE (M/S-M) 11660 9200
CATEGORY DAY 4 4
SUNSHINE HOURS 3 4
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ335>337-182115-
COASTAL BRAZORIA-COASTAL JACKSON-COASTAL MATAGORDA-
INCLUDING THE CITIES OF CLUTE, FREEPORT, LAKE JACKSON,
AND PALACIOS
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 88 (+2) 79 (-1) 88
RH % (24H TREND) 69 (-8) 89 (-2) 66
WIND 20FT/EARLY(MPH) SE 16 G24 SE 14 G22 SE 12
WIND 20FT/LATE(MPH) SE 17 SE 12 G19 SE 13
MAX/MIN MIX HGT(M) 910 1370
MAX/MIN MIX HGT(FT) 3000 4510
TRANSPORT WND (KTS) SE 21 SE 15
TRANSPORT WND (M/S) SE 11 SE 8
VENT RATE (M/S-M) 10010 10960
CATEGORY DAY 4 4
SUNSHINE HOURS 3 3
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
TXZ436>439-182115-
BOLIVAR PENINSULA-BRAZORIA ISLANDS-GALVESTON ISLAND-
MATAGORDA ISLANDS-
INCLUDING THE CITIES OF GALVESTON AND SURFSIDE BEACH
638 AM CDT MON MAY 18 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY MCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 10 0 20
CHANCE OF THUNDER (%) 10 0 20
TEMP (24H TREND) 86 (+2) 80 (0) 86
RH % (24H TREND) 74 (-8) 91 (-2) 75
WIND 20FT/EARLY(MPH) SE 17 SE 16 SE 14
WIND 20FT/LATE(MPH) SE 17 SE 15 SE 14
MAX/MIN MIX HGT(M) 730 940
MAX/MIN MIX HGT(FT) 2400 3080
TRANSPORT WND (KTS) SE 21 SE 15
TRANSPORT WND (M/S) SE 11 SE 8
VENT RATE (M/S-M) 8030 7520
CATEGORY DAY 4 3
SUNSHINE HOURS 4 3
REMARKS...
FOG POTENTIAL (FIRST 24 HOURS)...LOW
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE
MID 70S. HIGHS IN THE MID 80S. EAST WINDS AROUND 5 MPH.
THURSDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS AND
THUNDERSTORMS. LOWS IN THE MID 70S. HIGHS IN THE LOWER 80S. EAST
WINDS AROUND 5 MPH.
FRIDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE MID
70S. HIGHS IN THE LOWER 80S. SOUTH WINDS AROUND 5 MPH.
SATURDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE LOWER 70S. HIGHS IN THE LOWER 80S.
SOUTHEAST WINDS AROUND 5 MPH.
SUNDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE MID 70S. HIGHS IN THE LOWER 80S.
SOUTHEAST WINDS AROUND 5 MPH.
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