Special Weather Statement, NWS Austin/San Antonio, TX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
446 PM CDT Sun Jul 30 2017

.UPDATE...
Have issued a Heat Advisory for areas along and east of I-35 as
temperatures are in the 103 to 108 range along with heat index values
in the 108 to 112 range. It will run through 8 PM. Have also expanded
POPs a little to the southwest for this afternoon into evening based
on radar trends. Only other changes were to re-establish temperature,
dewpoint, and wind trends through this evening.

&&

.PREV DISCUSSION... /ISSUED 249 PM CDT Sun Jul 30 2017/

SHORT TERM (Tonight through Monday Night)...
A weak "cold" front moved earlier across the northern portion of the
Hill Country and since then, it was made little further progression.
In the mean time, temperatures will continue to rise into the upper
90s and up to 108 degrees across the southwest part of Rio Grande
this afternoon. Heat index values to top at 103 to 106 degrees
with isolated places reaching the 108-109 degree mark for an hour or
two. By the middle of this afternoon and early evening hours, enough
instability should be in place for isolated showers and
thunderstorms to develop along and ahead of the frontal boundary as
the cap erodes. If the storms manage to develop, some of them could
be strong with thunderstorm wind gusts of 40 to 50 mph. Also,
precipitable water values are around 2 inches which could result in
heavy downpours.

Rain chances continue overnight mainly across the Edwards Plateau
and Rio Grande Plains over the warmer/moist sector of the "cold"
front.

Lingering isolated showers and thunderstorms are expected mainly
across the southwest/Rio Grande Plains area Monday morning. A drier
airmass is expected to push from east Texas into our area Monday to
limit any convection to the coastal plains. Surface northeasterly
winds in the wake of the dissipate "cold" front and less moisture
will result in lower temperatures than previous days with highs in
the mid to upper 90s.

LONG TERM (Tuesday through Sunday)...
The upper level pattern is forecast to change and brings chances for
rain, especially from Wednesday into next weekend. Several upper
level short-waves are forecast to push down from the Central Plains
into our region and produce several rounds of scattered to numerous
showers and thunderstorms. The GFS and Canadian models suggest the
wetter period to be on Thursday while the EURO solution brings it on
Friday. However, overall, all medium range models are in good
agreement on increased chances for rain for the latter part of the
work week. There may be some lingering showers and thunderstorms for
the upcoming week mainly for areas east and south of Interstate 35
and coastal plains. Due to clouds and wet grounds, daily temperatures
should stay in the low to mid 90s from Wednesday through the
upcoming weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              76  98  76  98  76 /  10  -    0  10  10
Austin Bergstrom Intl Airport  74  97  73  97  74 /  10  -    0  10  10
New Braunfels Muni Airport     75  98  73  98  74 /  10  10   0  -   10
Burnet Muni Airport            73  94  72  93  72 /  10  -    0  10  20
Del Rio Intl Airport           79 101  78  99  77 /  10  20  -   10  10
Georgetown Muni Airport        73  96  73  96  74 /  10   0   0  10  10
Hondo Muni Airport             76 100  72 100  74 /  20  20   0  -   -
San Marcos Muni Airport        75  97  72  97  73 /  10  -    0  -   10
La Grange - Fayette Regional   74  97  73  97  75 /  10   0   0  10  10
San Antonio Intl Airport       77  98  75  98  76 /  20  10   0  -   10
Stinson Muni Airport           77  97  75  97  76 /  20  10   0  -   10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 8 PM CDT this evening for the following
counties: Atascosa...Bastrop...Bexar...Caldwell...Comal...De Witt...
Fayette...Frio...Gonzales...Guadalupe...Hays...Karnes...Lavaca...
Lee...Medina...Travis...Williamson...Wilson.

&&

Mesoscale/Aviation...Oaks
Synoptic/Grids...04
Public Service/Data Collection...33

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>