Marine Weather and Tides
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.
|Sunrise 6:32AM||Sunset 8:37PM||Monday June 21, 2021 3:03 AM CDT (08:03 UTC)||Moonrise 4:26PM||Moonset 2:46AM||Illumination 86%|
7 Day Forecast for Marine Location Near St. Hedwig, TXHourly EDIT Help
Area Discussion for - Austin/San Antonio, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KEWX 210752 AFDEWX
Area Forecast Discussion National Weather Service Austin/San Antonio TX 252 AM CDT Mon Jun 21 2021
SHORT TERM (Today through Tuesday). It's rather soupy early this morning across south-central Texas with dew points in the 73-80 degree range, and this will remain the case much of the day today, mixing down only a few degrees at most in the afternoon before finally dipping back into the 60s behind a cold front tonight. Low stratus have developed across much of the area this AM, and as usual they will mainly lift and scatter out through the late morning hours, although some cloud cover may remain over eastern portions of the area during the day. Temperatures are likely to be similar to yesterday east of I-35, while west they may warm 1- 3 degrees as H5 heights increase and the highest sun angle of the year works it's magic. With the elevated moisture compared to yesterday, heat indices today will easily top 105 across much of the region except the Hill Country. Southwest of San Antonio some spots will likely touch 110+ for a few hours. A Heat Advisory will be issued for most of the area from 17Z-01Z as a result, and although portions of the I-35 corridor and Coastal Plains may not reach thresholds, they will be included as well given the high population and thus risk of heat related health hazards.
The warm, moist airmass ahead of the front will provide ample instability for a few strong storms, on the order of 2000-3000 J/kg though waning rapidly behind the front. Deep shear will be relatively weak at about 20-25 knots and so quasi-linear storm modes will be preferred. Isolated severe storms capable of 60 mph wind gusts or large hail of 1-1.5" cannot be ruled out primarily along and north of a line from Eagle Pass to San Antonio to La Grange.
The earliest reasonable arrival time for storms will be about 5pm with the primary window for any severe weather coming between 7pm and 1am. Isolated to scattered showers and storms will gradually diminish in coverage late overnight, but may linger over mainly the southern tier or two of counties off and on through much of Tuesday. The strongest storms tonight may produce 1-2" of rainfall although a potential worst case isolated amount of 3-4" cannot be ruled out and minor impacts could occur. Generally not expecting this to be much of a risk given it's been 2.5 weeks since our spring deluge finally came to an end and things have had time to dry out a little.
Enjoy the much more comfortable day on Tuesday, as this falls climatologically below the 5th percentile in terms of lateness for the last "spring" cold front and highs over the northeastern third of our area will likely top out only in the mid to upper 80s as clouds may not clear there until late in the afternoon. Still expecting some low 90s near the Rio Grande Plains/Winter Garden.
LONG TERM (Tuesday Night through Sunday). After the comfortable day on Tuesday, summer returns for the remainder of the week as the Subtropical Ridge rebuilds over our area. Southerly winds return allowing temperatures and dewpoints to warm to slightly above normal keeping humidities elevated. Subsidence takes hold under the Ridge keeping rain out of the forecast, although cannot rule out an isolated shower or thunderstorm each afternoon near the Coastal Plains due to the seabreeze at peak heating.
As an upper level trough takes shape from the Great Lakes to the Eastern Plains late this week, the Ridge breaks down over our area with a shear axis possibly developing over the weekend. Another late season cold front drops down the Plains, however there is uncertainty on how far south it will go. All models remain consistent in generating showers and thunderstorms along the front. While the GFS remains consistent in bringing them into our area, the most recent runs of the ECMWF and CMC have trended drier keeping them mostly north of our area. Will maintain slight to chance POPs for now. Due to increased clouds and rain chances, temperatures will drop to near or slightly below normal for the weekend.
PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 94 70 85 73 95 / 20 60 10 - - Austin Bergstrom Intl Airport 95 70 84 72 95 / 20 60 20 - - New Braunfels Muni Airport 94 71 86 74 95 / - 50 20 - - Burnet Muni Airport 93 67 82 71 93 / 20 60 - 0 0 Del Rio Intl Airport 102 73 91 76 98 / - 60 10 - 0 Georgetown Muni Airport 94 68 82 71 93 / 20 70 10 - - Hondo Muni Airport 97 72 90 74 94 / - 60 20 - - San Marcos Muni Airport 94 70 85 72 95 / 10 50 20 - - La Grange - Fayette Regional 93 73 85 76 95 / 20 50 30 - 10 San Antonio Intl Airport 96 72 88 74 94 / - 50 20 - - Stinson Muni Airport 97 74 88 76 96 / - 50 20 - -
EWX WATCHES/WARNINGS/ADVISORIES. Heat Advisory from noon today to 8 PM CDT this evening for Atascosa- Bastrop-Bexar-Caldwell-Comal-De Witt-Dimmit-Fayette-Frio-Gonzales- Guadalupe-Hays-Karnes-Kinney-Lavaca-Lee-Maverick-Medina-Travis- Uvalde-Val Verde-Williamson-Wilson-Zavala.
Short-Term/Aviation . KCW Long-Term . 04
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Randolph Air Force Base, TX||8 mi||67 min||S 11||10.00 mi||Mostly Cloudy||81°F||77°F||87%||1007.4 hPa|
|San Antonio, Stinson Municipal Airport, TX||14 mi||70 min||SSE 7||7.00 mi||Overcast||84°F||79°F||85%||1006.8 hPa|
|San Antonio, San Antonio International Airport, TX||15 mi||72 min||SSE 12||9.00 mi||Overcast||81°F||76°F||85%||1007.3 hPa|
|San Antonio - Kelly Field, TX||19 mi||67 min||SSE 11||10.00 mi||A Few Clouds||82°F||77°F||86%||1007.6 hPa|
|New Braunfels Regional Airport, TX||22 mi||72 min||S 11||7.00 mi||Overcast||82°F||76°F||82%||1007.6 hPa|
Link to 5 minute data for KRND
Wind History from RND (wind in knots)
|1 day ago||Calm||N||Calm||NW||NW||W||SW||SW||S||SE||SE||S||S||S||SE||S||SE||SE||SE||S||S||S||SE||S|
|2 days ago||S||Calm||Calm||Calm||Calm||Calm||Calm||SE||S||Calm||SE||SE||E||E||SE||SE||SE||SE||SE||SE||SE||Calm||SE||SE |
EDIT Weekend mode (on/off) (on/off)  Help
EDIT (on/off)  Help
Weather Map(on/off)  Help Weather Map
GEOS Local Image of EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop
Other links: GEOS-West Contential US Full GOES-East
Please read website Cookie, Privacy, and Disclamers by clicking HERE.