Flash Flood Warning 41, NWS Houston/Galveston, TX

073 
WGUS74 KHGX 191529
FFSHGX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1029 AM CDT FRI SEP 19 2014

TXC015-157-201-473-191534-
/O.EXP.KHGX.FF.W.0041.000000T0000Z-140919T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
AUSTIN TX-HARRIS TX-WALLER TX-FORT BEND TX-
1029 AM CDT FRI SEP 19 2014

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN AUSTIN...WESTERN
HARRIS...SOUTHERN WALLER AND NORTHERN FORT BEND COUNTIES WILL EXPIRE
AT 1030 AM CDT...

THE HEAVY RAIN HAS ENDED...ALTHOUGH SOME LIGHT RAIN CONTINUES OVER 
PORTIONS OF THE AREA. SOME POOR DRAINAGE SPOTS COULD STILL HAVE SOME 
HIGH WATER...BUT MORE SIGNIFICANT FLASH FLOODING IS NO LONGER 
EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO HEED ALL ROAD CLOSURES.

LAT...LON 2982 9620 3005 9562 2969 9531 2948 9559
      2952 9596

$$

DR

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
643 AM CDT FRI SEP 19 2014

.DISCUSSION...
SEE AVIATION FOR 12Z TAF ISSUANCE.

&&

.AVIATION...
NUMEROUS SHOWERS AND THUNDERSTORMS THIS MORNING THANKS TO A
BOUNDARY AT 850MB ALONG WITH PLENTY OF MOISTURE AS PWATS ARE
AROUND 2.20". HIGH RES MODELS SHOWING PRECIP CONTINUING THIS
MORNING WITH SOME REDEVELOPMENT IN THE AFTERNOON. GFS AND ECMWF
BOTH SHOW REDEVELOPMENT THIS AFTERNOON. 23

&&

.PREV DISCUSSION... /ISSUED 452 AM CDT FRI SEP 19 2014/

DISCUSSION...
SHOWERS AND A FEW THUNDERSTORMS DEVELOPED QUICKLY AROUND 330 AM
AND HAVE CONTINUED TO EXPAND AND INTENSIFY. STORMS ARE LINING UP
FROM AROUND COLLEGE STATION ACROSS MONTGOMERY COUNTY AND ANOTHER
LINE ACROSS BRENHAM TO SW HARRIS TO GALVESTON. THESE STORMS APPEAR
TO BE FOCUSING ALONG THE 850-700 TROUGH AXIS AND MOISTURE IS IN
ABUNDANCE WITH GPS DATA SHOWING 2.4" PW AT HOUSTON AND MODEL
SOUNDING ARE PROGGING VERY FAVORABLE CONDITIONS FOR HEAVY RAINFALL
ACROSS THE AREA TODAY. HAVE EXPANDED THE FLOOD WATCH AND EXTENDED
IT TO 10 PM THOUGH BY 7 PM AM EXPECTING STORMS TO BE WEAKENING.
OF NOTE THE TEXAS TECH WRF ENSEMBLE PAINTS A VERY WET PATTERN FOR
MUCH OF THE AREA FROM COLLEGE STATION TO HUNTSVILLE AND AROUND THE
HOUSTON METRO AREA. DO HAVE SOME CONCERNS THAT BREAKS IN THE
CLOUDS TODAY COULD DRIVE UP TEMPERATURE AND DRAMATICALLY INCREASE
THE INSTABILITY. BASED ON YESTERDAYS MINIMAL DIURANAL TEMPERATURE
RANGES HAVE LOWERED TEMPERATURES TODAY AND THEY MAY NEED FURTHER
SHRINKING.

AS RIDGING SETTLES INTO LOWER MS VALLEY SATURDAY DRIER AIR FIRST
IN THE MID LEVELS AND EVENTUALLY THE LOWER LEVELS SPREADS INTO THE
AREA FROM THE EAST AND RAIN CHANCES SHIFT SOUTHWESTWARD AND FALL
OFF DRAMATICALLY FROM TODAYS NUMBERS. A SHOT OF DRIER AIR PUSHES
IN WITH THE NEXT FRONT AND BY MIDWEEK VERY PLEASANT WEATHER SHOULD
BE ON TAP.
45

MARINE...
ONSHORE WINDS WILL REMAIN RELATIVELY LIGHT OVER THE WATERS TODAY
THANKS TO A WEAK PRESSURE GRADIENT. WINDS WILL BEGIN TO BACK SUNDAY
AND TURN EASTERLY AS THE NEXT WEAK COLD FONT APPROACHES. WEEKEND
MARINERS CAN EXPECT SLIGHTLY ELEVATED SEA HEIGHTS DUE TO THE
PROLONGED EASTERLY FETCH. A SECONDARY SURGE OF UPPER LEVEL ENERGY
WILL PUSH THE COLD FRONT SLIGHTLY FURTHER SOUTH ON MONDAY BUT IT
WILL STILL NOT MAKE IT. EAST WINDS WILL PERSIST THROUGH NEXT WEEKEND
AND GRADUALLY STRENGTHEN TOWARD THE END OF THE WEEK AS THE PRESSURE
GRADIENT TIGHTENS. A PERSISTENT EASTERLY FETCH WILL ALLOW TIDE
LEVELS TO SLOWLY INCREASE THROUGH THE WEEK. 23

&&

.PRELIMINARY POINT TEMPS/POPS...
COLLEGE STATION (CLL)      84  72  88  73  89 /  80  20  30  10  20
HOUSTON (IAH)              85  72  87  74  89 /  80  20  30  10  30
GALVESTON (GLS)            85  78  85  78  85 /  70  30  30  30  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...FLOOD WATCH THROUGH THIS EVENING FOR THE FOLLOWING ZONES:
     AUSTIN...BRAZORIA...BRAZOS...BURLESON...CHAMBERS...
     COLORADO...FORT BEND...GALVESTON...GRIMES...HARRIS...
     JACKSON...LIBERTY...MADISON...MATAGORDA...MONTGOMERY...SAN
     JACINTO...WALKER...WALLER...WASHINGTON...WHARTON.

GM...NONE.
&&

DISCUSSION...45
AVIATION/MARINE...23

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
728 AM CDT FRI SEP 19 2014

TXZ163-164-176>179-195>200-210>214-226-227-235>238-201230-
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-
728 AM CDT FRI SEP 19 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

HEAVY RAINS ARE EXPECTED ACROSS THE REGION AND MUCH OF THE AREA IS
UNDER A FLOOD WATCH. AFTER DAYS OF MODERATE TO HEAVY RAINS THE
GROUND HAS BECOME SATURATED. STORMS TODAY WILL BE CAPABLE OF
PRODUCING RAINFALL RATES OF 2 INCHES PER HOUR AND AT TIMES MAY
APPROACH 3 INCHES PER HOUR. A BOUNDARY IS ALIGNED FROM NORTHWEST
TO SOUTHEAST ACROSS THE AREA AND STORMS SHOULD COALESCE ALONG THIS
BOUNDARY THROUGHOUT THE MORNING AND THEN SHIFT WEST AND SOUTHWEST
THIS AFTERNOON. STREET FLOODING WILL BE A PROBLEM THROUGHOUT THE
DAY AND AREA BAYOUS...STREAMS AND RIVERS WILL CONTINUE TO RISE AND
WILL POSE A FLOOD THREAT.

ALSO...FUNNEL CLOUDS ARE POSSIBLE WITHIN THIS TROPICAL AIR MASS.
THERE IS A SLIGHT CHANCE THAT ANY FUNNEL CLOUD MAY BRIEFLY TOUCH
DOWN AS A WEAK TORNADO.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

RAINS ON SATURDAY SHOULD GRADUALLY TAPER OFF WITH LESS INTENSE
RAINS. MUCH DRIER WEATHER WILL BE ON TAP SUNDAY THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTERS SHOULD RELAY ANY REPORTS OF THE FLOODING OF VEHICLES...MAJOR
ROADWAYS...AND OR HOMES TO THE HOUSTON GALVESTON NATIONAL WEATHER
SERVICE OFFICE.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
729 AM CDT FRI SEP 19 2014

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

0530 AM     HEAVY RAIN       7 E KATY                29.81N  95.71W
09/19/2014  M3.16 INCH       HARRIS             TX   MESONET

            3.16 INCHES AT SOUTH MAYDE CREEK AND GREENHOUSE RD IN 3
            HOURS

&&

EVENT NUMBER HGX1400210

BH