Flash Flood Warning 53, NWS Houston/Galveston, TX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1244 PM CDT Sat Aug 26 2017

.PREV DISCUSSION... /ISSUED 1019 AM CDT Sat Aug 26 2017/

..Catastrophic and life-threatening flooding expected due to
prolonged heavy rainfall from Harvey...

UPDATE...
Harvey continue to drift inland. The main rain area around the
storm was affecting the southwestern set of counties where
moderate to heavy rainfall was accompanied by wind gusts over
tropical storm force. A large outer rain band was moving inland
from the Gulf of Mexico across Galveston and Chambers counties
north- northwest across Walker, Grimes, Brazos and Madison
counties. Very gusty winds, isolated tornadoes, and heavy rainfall
will accompany the outer rain band. Southeasterly winds were
piling water along the western shores of Galveston Bay.

Updates have been issued.

40

&&

.AVIATION...
The messy forecast will persist as thunderstorm bands from Harvey
continue to move across SE TX. While the latest band is nudging E
of I-45 another appears to be forming and moving in from the west
for the latter part of the afternoon. Given the progs of the rem-
nants of Harvey lingering over the region through the near future
there is a lot of uncertainty with when things will be ending. As
such, have gone with prevailing TSRA UFN. 41

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      80  73  79  71  81 / 100  80  80  70  60
Houston (IAH)              81  75  80  72  81 / 100 100  80  80  80
Galveston (GLS)            84  78  83  77  82 / 100  80  80  80  80

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...Tropical Storm Warning for the following zones: Austin...
     Brazoria...Chambers...Colorado...Fort Bend...Galveston...
     Harris...Jackson...Liberty...Matagorda...Waller...Wharton.

     Flash Flood Watch through Tuesday evening for the following
     zones: 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.

GM...Tropical Storm Warning for the following zones: Coastal waters
     from Freeport to the Matagorda Ship Channel out 20 NM...
     Coastal waters from High Island to Freeport out 20 NM...
     Galveston Bay...Matagorda Bay...Waters from Freeport to the
     Matagorda Ship Channel from 20 to 60 NM...Waters from High
     Island to Freeport from 20 to 60 NM.

&&

Discussion...99
Aviation/Marine...41

Hazardous Weather Outlook
National Weather Service Houston/Galveston TX
741 AM CDT Sat Aug 26 2017

GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226-
227-235>238-271100-
Austin-Brazoria-Brazos-Burleson-Chambers-
Coastal waters from Freeport to the Matagorda Ship Channel out
20 NM-Coastal waters from High Island to Freeport out 20 NM-
Colorado-Fort Bend-Galveston-Galveston Bay-Grimes-Harris-Houston-
Jackson-Liberty-Madison-Matagorda-Matagorda Bay-Montgomery-Polk-
San Jacinto-Trinity-Walker-Waller-Washington-
Waters from Freeport to the Matagorda Ship Channel from 20 to
60 NM-Waters from High Island to Freeport from 20 to 60 NM-
Wharton-
741 AM CDT Sat Aug 26 2017

This hazardous weather outlook is for portions of Southeast Texas.

.DAY ONE...Today and Tonight

Rainbands from Harvey will produce gusty winds, locally heavy rainfall
and associated flooding, and isolated tornadoes. Flooding will occur
as rainfall totals could approach or exceed 10 to 15 inches.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

Harvey is expected to meander in and around the Southeast Texas area
for several days and produce round after round of showers and thunderstorms.
Rainfall totals (including today's and tonight's 10 to 15 inches) will
be adding up with event amounts of 15 to 30 inches expected and isolated
maximum totals of 40 inches possible. The greatest threat area is expected
to be generally along and south of a line from Brenham to Conroe to
High Island. Rainfall of this magnitude will cause catastrophic and
life-threatening flooding.

.SPOTTER INFORMATION STATEMENT...
Spotters will be needed over the weekend and through at least the
first half of the week.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
219 PM CDT SAT AUG 26 2017

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

0345 PM     TORNADO          10 S BAY CITY           28.83N  95.96W
08/25/2017                   MATAGORDA          TX   BROADCAST MEDIA

            SHED AND FENCE DAMAGE REPORTED FROM A TORNADO IN
            SARGENT

0900 PM     FLOOD            4 N BONNEY              29.35N  95.47W
08/25/2017                   BRAZORIA           TX   LAW ENFORCEMENT

            FLOODED ROADWAYS FM 655 AND FM 521 IN ROSHARON... TIME
            OF EVENT ESTIMATED.

0900 PM     FLOOD            7 NNE OYSTER CREEK      29.09N  95.28W
08/25/2017                   BRAZORIA           TX   LAW ENFORCEMENT

            DEMIJOHN CR 227 REPORTED IMPASSIBLE.

1117 PM     TORNADO          2 E ANGLETON            29.17N  95.39W
08/25/2017                   BRAZORIA           TX   LAW ENFORCEMENT

            BRAZORIA COUNTY LAW ENFORCEMENT POSSIBLE TORNADO
            DAMAGE... HOUSE OFF FOUNDATION COUNTY RD. 210 AND FM
            523. TIME GIVEN WAS 1117 PM BUT STILL NEED TO VERIFY
            WITH RADAR. TIME DID NOT MATCH.

0227 AM     TORNADO          6 NNW PECAN GROVE       29.70N  95.78W
08/26/2017                   FORT BEND          TX   BROADCAST MEDIA

            ROOF DAMAGE REPORTED TO A HOME NEAR WESTPARK TOLLWAY
            AND THE GRAND PARKWAY

0230 AM     TORNADO          3 S MANVEL              29.44N  95.36W
08/26/2017                   BRAZORIA           TX   EMERGENCY MNGR

            REPORT CAME IN FROM THE MANVEL EOC REGARDING DAMAGED
            VEHICLES AND BUILDING DAMAGE. POSSIBLY OCCURED BETWEEN
            215-245 AM NO COUPLET SEEN ON HGX NOR HOU RADAR DURING
            THAT TIME.

0744 AM     TORNADO          4 SE HUMBLE             29.95N  95.23W
08/26/2017                   HARRIS             TX   BROADCAST MEDIA

            BROADCAST MEDIA REPORTING TORNADO TOUCHDOWN RESULTING
            IN ROOF... TREE... AND FENCE DAMAGE IN LAKESHORE
            SUBDIVISION

0805 AM     TORNADO          8 S COLLEGE STATION     30.48N  96.32W
08/26/2017                   BRAZOS             TX   BROADCAST MEDIA

            TREE DAMAGE REPORTED NEAR OLYMPIA BUDDY ROAD

0908 AM     FLASH FLOOD      3 WNW WOODLOCH          30.24N  95.46W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSIBLE AT 45 NB FDR AND HIGHWAY 242. HIGH
            WATER OVER THE RIGHT LANE ONTO 45 NB FDR.

0949 AM     FLASH FLOOD      1 WNW WILLIS            30.43N  95.49W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSABLE AT 45 NB FDR AND LINCOLN RIDGE WITH 12
            INCHES OF WATER. BARRICADE REQUIRED AT MLK.

1024 AM     FLASH FLOOD      2 ESE PORTER HEIGHTS    30.14N  95.29W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            RAOD IMPASSABLE AT HORSESHOE CIR AND PAINTED BLVD WITH
            4-6 INCHES OF WATER.

1040 AM     FLASH FLOOD      2 NNW SHENANDOAH        30.21N  95.47W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSABLE AT 11000 BLK RIVER OAKS DR WITH AT
            LEAST 2 FEET OF WATER.

1043 AM     FLASH FLOOD      1 W WILLIS              30.43N  95.49W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            IMPASSABLE ROAD AT 45 NB FEDER JNO HINES RD. BARRICADES
            HAVE BEEN SET UP.

1059 AM     FLASH FLOOD      SHENANDOAH              30.18N  95.45W
08/26/2017                   MONTGOMERY         TX   LAW ENFORCEMENT

            ROAD IMPASSABLE AT 19000 BLK DAVID MEMORIAL FROM SAMS
            CLUB TO SHANANDOAH PARK

1140 AM     FLASH FLOOD      1 E HUNTSVILLE          30.71N  95.53W
08/26/2017                   WALKER             TX   BROADCAST MEDIA

            ROAD CLOSED AT BOWERS ROAD AND BEARKAT BLVD

1140 AM     FLASH FLOOD      1 E NEW WAVERLY         30.54N  95.46W
08/26/2017                   WALKER             TX   BROADCAST MEDIA

            ROAD CLOSED DUE TO FLASH FLOODING AT FM 150 AND PODRAZA
            ROAD

1140 AM     FLASH FLOOD      9 SSW HUNTSVILLE        30.61N  95.63W
08/26/2017                   WALKER             TX   BROADCAST MEDIA

            ROAD CLOSED DUE TO FLASH FLOODING AT FM 1374 AND COTTON
            ROAD

1158 AM     FLASH FLOOD      2 W SHOREACRES          29.62N  95.03W
08/26/2017                   HARRIS             TX   COUNTY OFFICIAL

            WATER OVER FIRE HYDRANTS SHOREACRES AT TAYLORS BAYOU

&&

EVENT NUMBER HGX1700341
EVENT NUMBER HGX1700342
EVENT NUMBER HGX1700343
EVENT NUMBER HGX1700344
EVENT NUMBER HGX1700345
EVENT NUMBER HGX1700346
EVENT NUMBER HGX1700347
EVENT NUMBER HGX1700348
EVENT NUMBER HGX1700349
EVENT NUMBER HGX1700350
EVENT NUMBER HGX1700351
EVENT NUMBER HGX1700352
EVENT NUMBER HGX1700353
EVENT NUMBER HGX1700354
EVENT NUMBER HGX1700355
EVENT NUMBER HGX1700356
EVENT NUMBER HGX1700357
EVENT NUMBER HGX1700358

DO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
243 PM CDT SAT AUG 26 2017

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

0218 PM     WATER SPOUT      10 ENE GALVESTON        29.30N  94.76W
08/25/2017                   GMZ355             TX   PUBLIC

            WATERSPOUT SEEN FROM EAST END NEAR SEAWALL AND SECOND
            STREET

&&

EVENT NUMBER HGX1700359

MH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
254 PM CDT SAT AUG 26 2017

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

0244 PM     FLASH FLOOD      5 SE ONALASKA           30.77N  95.04W
08/26/2017                   POLK               TX   DEPT OF HIGHWAYS

            HIGH WATER ON FM 3126 AND FM 356

&&

EVENT NUMBER HGX1700360

47

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
419 PM CDT SAT AUG 26 2017

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

0408 PM     TORNADO          10 WNW JERSEY VILLAGE   29.95N  95.73W
08/26/2017                   HARRIS             TX   STORM CHASER

            TREES BLOWN OVER AND MINOR ROOF DAMAGE REPORTED NEAR
            BARKER CYPRESS AND TUCKERTON

&&

EVENT NUMBER HGX1700361

MH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
441 PM CDT SAT AUG 26 2017

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

0423 PM     TORNADO          7 WNW JERSEY VILLAGE    29.91N  95.69W
08/26/2017                   HARRIS             TX   PUBLIC

            TORNADO CONFIRMED VIA SOCIAL MEDIA

&&

EVENT NUMBER HGX1700362

DO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
449 PM CDT SAT AUG 26 2017

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

0427 PM     TORNADO          8 NW JERSEY VILLAGE     29.95N  95.67W
08/26/2017                   HARRIS             TX   LAW ENFORCEMENT

            ANOTHER TORNADO CONFIRMED ON THE GROUND IN THE VICINITY
            OF HIGHWAY 290 AND BARKER CYPRESS

&&

EVENT NUMBER HGX1700363

47