Special Weather Statement, NWS Austin/San Antonio, TX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
219 PM CDT Sun Jul 26 2020

.SHORT TERM (Tonight through Monday Night)...
Deep tropical moisture continues to stream over South Central Texas
as Tropical Storm Hanna moves westward into northeastern Mexico.
Pwat values of 2.0 to 2.4 inches have pooled over much of the region
and daytime heating has reinvigorated the outer and far reaching
rain bands of Hanna. Storms seem to be generating along the coast
and over the Coastal Plains, likely from frictional convergence, and
push further into the CWA as light to moderate rain showers. Bands
of rain have been quick moving throughout the day. So even under the
heaviest rain showers, certain isolated areas have only picked up
about 2 inches of rain.

High resolution guidance have some disagreement on handling
convection later this afternoon with the NAM NEST showing a lull in
activity till daytime heating gets going tomorrow but the latest 18Z
HRRR and Texas Tech WRF show continued isolated activity through
this evening. Keeping rain/storm chances in the forecast for much of
the area given the sporadic nature of showers and storms the last 36
hours. Trimming back chances for rain overnight to areas along and
south of I-10 and US 90.

Moisture values remain elevated through the day on Monday but
coverage of showers and storms should be less than what was seen
today. Less cloud cover and less chances for rain will spell a bump
back up in afternoon temps into the mid 90s, far southern zones may
only make it to the upper 80s or low 90s with better chances for
rain.

Upper level pattern will remain slightly unstable with the
subtropical ridge attempting to build in from the Desert Southwest
but not close enough at the end of the long term to have any
dominate features of the weather pattern.

&&

.LONG TERM (Tuesday through Sunday)...
Afternoon rain chances continue for Tuesday and Wednesday before the
upper ridge gets hold of the area on Thursday. While under upper
ridging, the forecast becomes dry and a warming trend ensues. The the
end of the week and into the weekend, temperatures have crept back up
to the triple digits for a good part of the area.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              74  95  75  93  76 /  20  30  -   20  -
Austin Bergstrom Intl Airport  74  94  74  93  75 /  20  30  -   20  -
New Braunfels Muni Airport     74  93  74  92  74 /  30  40  10  30  -
Burnet Muni Airport            72  93  73  93  74 /  20  20  -   20  -
Del Rio Intl Airport           74  95  76  96  76 /  30  30  20  20  10
Georgetown Muni Airport        74  94  75  94  76 /  20  20  -   20  -
Hondo Muni Airport             73  94  74  95  75 /  30  30  10  30  10
San Marcos Muni Airport        74  93  74  93  74 /  20  30  10  30  -
La Grange - Fayette Regional   76  94  76  94  76 /  20  40  20  30  -
San Antonio Intl Airport       75  94  76  94  76 /  30  40  10  40  10
Stinson Muni Airport           74  93  75  93  76 /  30  40  10  30  10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

Short-Term/Aviation...EWilliams
Long-Term...YB
Decision Support...Platt

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
521 AM CDT Sun Jul 26 2020

TXZ171>173-183>194-202>209-217>225-228-271030-
Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera-
Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde-
Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala-
Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit-
521 AM CDT Sun Jul 26 2020

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Today And Tonight.

Locally heavy rainfall is possible south of I-10/Hwy 90 as
Tropical Storm Hanna moves away to the west.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

Special Weather Statement
National Weather Service Austin/San Antonio TX
300 PM CDT Sun Jul 26 2020

TXZ173-262045-
Williamson TX-
300 PM CDT Sun Jul 26 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WILLIAMSON COUNTY
UNTIL 345 PM CDT...

At 259 PM CDT, Doppler radar was tracking a strong thunderstorm over
Granger Dam, or near Granger, moving west at 25 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Granger, Bartlett, Weir, Granger Dam, Laneport, Hoxie, Waterloo,
Walburg, Schwertner and Highway 95.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3074 9727 3071 9726 3060 9731 3068 9761
      3085 9756
TIME...MOT...LOC 1959Z 110DEG 22KT 3071 9736

PLATT