Hazardous Weather Outlook
Issued by NWS Houston/Galveston, TX

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FLUS44 KHGX 231220
HWOHGX

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
720 AM CDT SAT MAY 23 2015

TXZ163-164-176>179-195>200-210>214-226-227-235>238-241230-
AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-
GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA-
MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON-
WHARTON-
720 AM CDT SAT MAY 23 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

SCATTERED SHOWERS AND THUNDERSTORMS ARE POSSIBLE TODAY ACROSS
SOUTHEAST TEXAS. BRIEF HEAVY DOWNPOURS WITH SPOTTY ACCUMULATIONS
OF 1 TO 2 INCHES WILL BE POSSIBLE WITH THESE STORMS. BRIEF GUSTY
WINDS AND EVEN SMALL HAIL MAY BE POSSIBLE WITH THE STRONGER STORMS
THIS AFTERNOON. A LARGE SWATH OF SHOWERS AND THUNDERSTORMS IS
EXPECTED TO MOVE EAST FROM THE HILL COUNTRY OVERNIGHT. WIDESPREAD
HEAVY RAIN IS EXPECTED MAINLY WEST OF THE INTERSTATE 45 CORRIDOR.
ACCUMULATIONS OF 1 TO 3 INCHES IS LIKELY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

A FLASH FLOOD WATCH IS IN EFFECT.

A STRONG UPPER LEVEL STORM SYSTEM WILL MOVE OUT OF THE FOUR
CORNERS AREA PULLING UNUSUALLY HIGH MOISTURE LEVELS FROM THE GULF
AND FROM THE TROPICAL PACIFIC NORTHWARDS INTO SOUTHEAST TEXAS.
THIS WILL LEAD TO A LONG DURATION HEAVY RAIN EVENT BEGINNING
SUNDAY MORNING IN SOUTHEAST TEXAS. RAIN CHANCES INCREASE FROM
WEST TO EAST SUNDAY AS THE FIRST IN A SERIES OF UPPER LEVEL
DISTURBANCES TRACK INTO THE REGION. A LARGE SWATH OF STORMS SHOULD
STRETCH FROM SOUTH TEXAS UP THROUGH THE HILL COUNTRY SATURDAY
NIGHT THEN GRADUALLY SHIFT EASTWARD. THIS PATTERN WILL SLOWLY
SHIFT EASTWARD ACROSS SOUTHEAST TEXAS SUNDAY MORNING AND
AFTERNOON. VERY HEAVY RAINFALL IS EXPECTED. IN ADDITION TO THE VERY
HEAVY RAIN THE POSSIBILITY OF TORNADOES WILL INCREASE SUNDAY AND
SUNDAY NIGHT. ANOTHER BAND OR CLUSTER OF THUNDERSTORMS WITH VERY
HEAVY RAIN STORMS IS EXPECTED ON MEMORIAL DAY. THE TIMING OF THE
STORMS IS NOT THAT CERTAIN AS THE EARLIER STORMS MAY LEAVE A
BOUNDARY TO FOCUS RAINS EVEN MORE. REGARDLESS THIS PATTERN IS
LIKELY TO PRODUCE SHORT TERM FLASH FLOODING SUNDAY AND THEN WITH
INCREASINGLY LARGER IMPACTS ON MONDAY AS THE GROUND BECOMES FULLY
SATURATED AGAIN AND INCAPABLE OF HOLDING MORE RAINFALL. MOST OF
THE RAINS WILL BECOME RUNOFF AND STREET FLOODING WILL BE LIKELY ON
SUNDAY AND EVEN MORE WIDESPREAD ON MONDAY. IN ADDITION RIVER
FLOODING WILL BECOME MORE COMMON WITH ALL OF THIS RUNOFF AND THE
ALREADY SWOLLEN RIVERS. RAINFALL TOTALS OF 2 TO 4 INCHES WILL BE
COMMONPLACE BY MONDAY NIGHT WITH SOME AREAS SEEING AMOUNTS OF 8 TO
11 INCHES.

IN ADDITION THE POSSIBILITY OF STRONG TO SEVERE THUNDERSTORMS WILL
EXIST ON SUNDAY. DAYTIME HEATING SHOULD INCREASE THE INSTABILITY
OVER THE AREA AND STRONG WINDS IN THE LOWER LEVELS OF THE
ATMOSPHERE WILL LEAD TO AN ISOLATED TORNADO THREAT AND POSSIBLY A
DAMAGING WIND THREAT. WITH THE GROUND BECOMING SATURATED AND TREES
FULLY LEAFED OUT THE POSSIBILITY OF TREES BEING UPROOTED MAY OCCUR
WITH LIGHTER WINDSPEEDS THAN NORMAL.

THE WIDESPREAD HEAVY RAINFALL THREAT SHOULD LOWER ON TUESDAY BUT
SCATTERED STORMS WILL STILL BE POSSIBLE WITH A MORE ISOLATED HEAVY
RAINFALL THREAT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS LIKELY SATURDAY NIGHT THROUGH TUESDAY.

$$

GMZ330-335-350-355-370-375-241230-
GALVESTON BAY-MATAGORDA BAY-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM-
WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM-
WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM-
WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-
720 AM CDT SAT MAY 23 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

WINDS AND WAVES WILL INCREASE OVER THE MARINE AREAS ON SATURDAY
AND SUNDAY... AND SMALL CRAFT ADVISORIES WILL BE IN EFFECT
SATURDAY NIGHT THROUGH SUNDAY. IN ADDITION STRONG THUNDERSTORMS
WILL BE POSSIBLE PRIMARILY SUNDAY THROUGH TUESDAY.

A HIGHER THAN NORMAL RISK OF RIP CURRENTS IS EXPECTED TO DEVELOP
OVER THE MEMORIAL DAY WEEKEND ALONG AREA BEACHES. IF GOING TO THE
BEACH...SWIM NEAR A LIFEGUARD AND WELL AWAY FROM JETTIES...
GROINS...AND PIERS. SWIM NEAR A LIFEGUARD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

$$



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