Flash Flood Watch 3, NWS Houston/Galveston, TX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
1215 AM CDT Tue Jun 19 2018

.AVIATION...
Looks like a band of moderate/heavy rains from the Gulf is setting
up across Galveston/Harris counties for the overnight hours. Winds
are also increasing as the low-level jet develops. And so, for the
short term, TAFS for the IAH/HOU/SGR/GLS are expected to remain on
the messy side. Did keep precipitation going for most sites tomor-
row as this upper low lingers over the region. MVFR/LIFR CIGS will
likely prevail. 41

&&

.PREV DISCUSSION... /ISSUED 1031 PM CDT Mon Jun 18 2018/

UPDATE...
Rain showers have been overall lest robust so far this evening
than they were during the day today. It appears that the banding
of showers and storms over the Beaumont area has weakened quite a
bit and a new area of banding has set up near Matagorda Bay.
However, rain rates with the stronger showers have only been in
the neighborhood of 1 inch per hour so far. More robust convection
should begin to develop during the overnight/early morning hours
somewhere along the coast, but models have certainly been
struggling with location of the heaviest rains so far. WPC has
upgraded the area around and east of Galveston Bay to a moderate
risk in the Excessive Rainfall Outlook for tonight as that general
area received several inches of rainfall already today and any
more heavy rainfall overnight would likely lead to flooding.

11

&&

.PRELIMINARY POINT TEMPS/POPS...
College Station (CLL)      74  84  74  87  75 /  40  70  40  50  20
Houston (IAH)              76  83  77  88  76 /  50  60  40  50  20
Galveston (GLS)            81  84  82  87  81 /  60  50  30  40  30

&&

.HGX WATCHES/WARNINGS/ADVISORIES...
TX...SMALL CRAFT SHOULD EXERCISE CAUTION from this evening through
     Wednesday morning for the following zones: Matagorda
     Islands.

     Coastal Flood Advisory until 3 PM CDT this afternoon for the
     following zones: Galveston Island and Bolivar Peninsula.

GM...SMALL CRAFT SHOULD EXERCISE CAUTION through Wednesday morning
     for the following zones: Matagorda Bay.

     SMALL CRAFT SHOULD EXERCISE CAUTION from this evening through
     Wednesday morning for the following zones: Coastal waters
     from Freeport to Matagorda Ship Channel TX out 20 NM...
     Coastal waters from High Island to Freeport TX out 20 NM...
     Galveston Bay.

     Small Craft Advisory until 7 PM CDT this evening for the
     following zones: Coastal waters from Freeport to Matagorda
     Ship Channel TX out 20 NM...Coastal waters from High Island
     to Freeport TX out 20 NM...Galveston Bay.

     Small Craft Advisory until 10 AM CDT Wednesday for the following
     zones: Waters from Freeport to Matagorda Ship Channel TX
     from 20 to 60 NM...Waters from High Island to Freeport TX
     from 20 to 60 NM.

&&

Hazardous Weather Outlook
National Weather Service Houston/Galveston TX
441 AM CDT Mon Jun 18 2018

TXZ163-164-176>179-195>200-210>214-226-227-235>238-300-313-
335>338-190945-
Austin-Brazos-Burleson-Chambers-Coastal Brazoria-
Coastal Galveston-Coastal Harris-Coastal Jackson-
Coastal Matagorda-Colorado-Fort Bend-Grimes-Houston-
Inland Brazoria-Inland Galveston-Inland Harris-Inland Jackson-
Inland Matagorda-Madison-Montgomery-Northern Liberty-Polk-
San Jacinto-Southern Liberty-Trinity-Walker-Waller-Washington-
Wharton-
441 AM CDT Mon Jun 18 2018

This hazardous weather outlook is for portions of Southeast Texas..

.DAY ONE...Today and Tonight

Scattered to numerous showers and thunderstorms will be possible
today. Locally heavy rain will be possible and may result in minor
flooding. Tropical funnel clouds may also be possible.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Scattered to numerous showers and thunderstorms will be possible
Tuesday through Thursday. Locally heavy rain will be possible and
may result in minor flooding. Tropical funnel clouds may also be
possible.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rain totals or any flooding
observed to the National Weather Service.

TXZ436>438-190945-
Brazoria Islands-Galveston Island and Bolivar Peninsula-
Matagorda Islands-
441 AM CDT Mon Jun 18 2018

This hazardous weather outlook is for portions of Southeast Texas..

.DAY ONE...Today and Tonight

Scattered to numerous showers and thunderstorms will be possible
today. Locally heavy rain will be possible and may result in minor
flooding. Tropical funnel clouds may also be possible.

A high rip current risk will exist along Gulf-facing beaches
today. Minor tidal overwash will also be possible along Highway 87
in Bolivar Peninsula at times of high tide.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Scattered to numerous showers and thunderstorms will be possible
Tuesday through Thursday. Locally heavy rain will be possible and
may result in minor flooding. Tropical funnel clouds may also be
possible.

A high rip current risk will be possible along Gulf-facing
beaches Tuesday. Minor tidal overwash will also be possible along
Highway 87 in Bolivar Peninsula at times of high tide.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to report rain totals or any flooding
observed to the National Weather Service.

GMZ330-335-350-355-370-375-190945-
Coastal waters from Freeport to Matagorda Ship Channel TX out
20 NM-Coastal waters from High Island to Freeport TX out 20 NM-
Galveston Bay-Matagorda Bay-
Waters from Freeport to Matagorda Ship Channel TX from 20 to
60 NM-Waters from High Island to Freeport TX from 20 to 60 NM-
441 AM CDT Mon Jun 18 2018

This hazardous weather outlook is for portions of Southeast Texas..

.DAY ONE...Today and Tonight

Small Craft Advisories are in effect for increasing winds and
waves today.

Scattered to numerous showers and thunderstorms will
be capable of locally heavy rainfall resulting in reduced
visibilities, gusty winds, and funnel clouds or waterspouts.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Small Craft Advisories are in effect for elevated winds and waves
through Wednesday.

Periods of showers and thunderstorms will be possible through
Tuesday and will be capable of locally heavy rainfall resulting in
reduced visibilities, gusty winds and funnel clouds or
waterspouts.

.SPOTTER INFORMATION STATEMENT...

Mariners are encouraged to report any hazardous weather they
observe through Tuesday to the Coast Guard or National Weather
Service.