Thursday, March4, 2021
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Marine Weather and Tides
Castle Hills, TX

Version 3.4
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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 6:54AMSunset 6:36PM Thursday March 4, 2021 10:46 PM CST (04:46 UTC) Moonrise 12:00AMMoonset 10:39AM Illumination 60% Phase: Waning Gibbous; Moon at 21 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Castle Hills, TX
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location: 29.51, -98.53     debug


Area Discussion for - Austin/San Antonio, TX
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FXUS64 KEWX 042338 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 538 PM CST Thu Mar 4 2021

AVIATION.

VFR conditions continue through this evening with a mix of passing high clouds and some initial development of low level clouds. Low clouds do increase into and through the overnight with IFR to MVFR ceilings developing for the TAF sites along I-35. Fog could also develop for the TAF sites along I-35, especially for the San Antonio sites, where visibility may drop to around a mile during the early to mid-morning hours on Friday. For DRT, VFR conditions primarily prevail into Friday morning, but could potentially see a temporary period of MVFR ceilings around daybreak. Conditions improve to VFR at all sites by around midday as a frontal boundary advances through the area. Breezy north-northwesterly winds prevail behind the front with gusts in the range of 20 to 25 knots, possibly even higher at times. Otherwise, the breezes from this afternoon are expected to weaken to lighter speeds overnight.

PREV DISCUSSION. /ISSUED 226 PM CST Thu Mar 4 2021/

SHORT TERM (Tonight through Friday Night) . Latest SPC Mesoanalysis places a sfc low over the northwestern TX Panhandle, with a sfc cold front extending southwestward through eastern New Mexico. Out ahead of this sfc low, winds have begun to turn more south-southeasterly for South-Central Texas, resulting in a light breeze at the surface in increasing moisture return. High clouds from the west continue to stream over the region as an upper level low centered over the Four Corners will quickly dive southeast over eastern Oklahoma by Friday afternoon. The progressive nature of this system will not help our rain chances with the approaching cold front, as most of the lifting mechanisms remain to our north, and surface moisture return looks to be quite weak. The main story with the front will be gusty northwesterly winds, and elevated to near- critical fire weather conditions developing on Friday afternoon.

The remainder of your Thursday will be quite nice, with temperatures topping out in the lower 70s for most, with plenty of sunshine, along with some scattered high clouds. Get the cameras ready, as a good sunset could be in the works this evening. For tonight, winds will become variable and almost calm at times over the Coastal Plains, stretching northwestward into the Hill Country. With increased sfc moisture, and lighter winds, we might see some patchy fog develop northwest of the San Antonio Metro and out over Kerr, Real, Bandera, and Kendall Counties by early Friday morning. Any sort of low clouds or fog should quickly mix out as a cold front sweeps through the CWA from northwest to southeast late morning- early afternoon. Winds will quickly pick up behind this boundary, sustained at 15 to 25 mph, and gusting to 35 mph or higher at times. Expect gusty winds to continue through sunset and even shortly thereafter. With a tight pressure gradient finally relaxing by about 06Z Saturday, we should see winds diminish by late Friday night into early Saturday morning. Cooler temperatures can be expected to start your Saturday, with 40s north and west, and 50s to the south and east.

LONG TERM (Saturday through Thursday) . Most clouds are expected to dissipate by Saturday afternoon with partly cloudy skies and highs in the lower 60s across the Hill Country to near 70 across the southwest counties. The return of an east to southeasterly flow across all of South Central Texas brings increased moisture over the area on Saturday night into Sunday morning. Clouds are forecast to stay around for a longer period on Sunday morning, however, partly cloudy skies are expected to prevail on Sunday afternoon over a good portion of the area.

Several upper level short waves are forecast to push across the area the first part of next week. However, dry weather conditions persist through the period. It will turn breezy on Tuesday and Wednesday afternoons as surface high pressure dominates the eastern part of the United States and a mid to upper short waves over west Texas pushes across the Southern Plains. No expecting precipitation with these systems, however, can't rule out patchy fog and drizzle/mist on Tuesday and Wednesday mornings. A warming trend is expected next week with highs in the 80s almost everywhere across the area on Wednesday afternoon.

FIRE WEATHER . Elevated to near critical fire weather conditions are expected in the wake of a cold frontal passage on Friday. Northwesterly winds of 15 to 25 mph with gusts up to 35 mph are expected. Afternoon humidities in the 20s are expected for most areas with some spots in the teens across the Rio Grande Plains. The main threat area will be across the Hill Country to Rio Grande Plains to along the Escarpment. The greatest threat area for critical fire weather levels to be reached for several hours will be along and south of US Highway 90 and west of I-37 where the strongest winds and lowest humidities will be found. Additionally, a lack of significant wetting rains and mostly cured fuels due to recent hard freezes are found across most areas. Relative humidities will recover by the early evening hours across the entire region.

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 53 78 51 66 45 / - 0 0 0 0 Austin Bergstrom Intl Airport 52 79 51 67 44 / - - 0 0 0 New Braunfels Muni Airport 54 81 51 68 46 / - - 0 0 0 Burnet Muni Airport 51 74 48 63 44 / 0 0 0 0 0 Del Rio Intl Airport 52 79 49 70 51 / 0 0 0 0 0 Georgetown Muni Airport 52 77 49 65 44 / - 0 0 0 0 Hondo Muni Airport 53 81 49 68 47 / - 0 0 0 0 San Marcos Muni Airport 52 79 50 67 44 / - - 0 0 0 La Grange - Fayette Regional 52 78 52 67 44 / - 10 0 0 0 San Antonio Intl Airport 55 79 51 67 48 / - - 0 0 0 Stinson Muni Airport 55 80 51 67 48 / - - 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES. None.

Short-Term/Aviation . Brady Long-Term . Runyen


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Antonio, San Antonio International Airport, TX4 mi55 minSSE 1210.00 miA Few Clouds60°F51°F72%1014.3 hPa
San Antonio - Kelly Field, TX9 mi50 minSE 1310.00 miFair60°F52°F73%1014.3 hPa
Randolph Air Force Base, TX13 mi50 minSSE 910.00 miFair58°F52°F79%1014.9 hPa
San Antonio, Stinson Municipal Airport, TX13 mi53 minSE 810.00 miFair58°F53°F84%1014.5 hPa
San Antonio Boerne Stage Field, TX17 mi71 minS 810.00 miFair59°F50°F72%1014.9 hPa
Castroville Municipal Airport, TX21 mi71 minESE 57.00 miFair64°F53°F67%1015.6 hPa

Link to 5 minute data for KSAT

Wind History from SAT (wind in knots)
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Last 24hrSE10SE7S5SE3CalmCalmCalmNW3CalmCalmCalmS7SE5S8SE12
G18
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1 day agoCalmNW3NW3W5NW3NW5NW4NW5NW4NW3CalmS5S7CalmS86SE6SE8SE7SE9SE6SE5CalmSE14
2 days agoN8NW10
G17
N10N7NW5N6NW6CalmNW6N6N12
G21
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G17
NW105NE10CalmE5CalmNE4E5E3Calm

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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.
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