FXUS64 KEWX 120911 AFDEWX Area Forecast Discussion National Weather Service Austin/San Antonio TX 311 AM CST Fri Dec 12 2025 ...New UPDATE... .KEY MESSAGES... - Areas of dense fog Coastal Plains to the I-35 corridor through mid morning. - Temperatures up and down several times over the next seven days. - Low to medium chances (20 to 40 percent) of rain for the Coastal Plains Saturday and for the Rio Grande Sunday, otherwise dry conditions for the next seven days. && .UPDATE... Issued at 311 AM CST Fri Dec 12 2025 Dense fog with visibilities of 1/4 mile or less is becoming more widespread. Have issued a Dense Fog Advisory through 9 AM when it will be lifting. && .SHORT TERM... (Today through Saturday) Issued at 1218 AM CST Fri Dec 12 2025 Low level moist air is returning to South-Central Texas. Dewpoint temperatures over the Coastal Plains are 15-20 degrees higher than 24 hours ago. Moist air will continue to move toward the northwest today with southeasterly winds. The main questions will be if there will be fog, how far inland will it reach, and how low the visibility will be? We should see at least patchy fog over the Coastal Plains. It will probably reach the San Antonio area, but not Austin. There may be some spots with dense fog, and we may need to issue a Dense Fog Advisory by morning. Fog may have an affect on temperatures later today. Highs today will certainly be warmer than yesterday, but they should be kept lower where there is fog later in the morning. Fair weather will continue tonight. We don't expect a repeat of fogginess with a little more wind keeping things mixed. Low temperatures will be warmer with continued warm advection. Saturday the southeasterly low level flow will continue, and there may be enough isentropic lift to produce light rain over the Coastal Plains before noon. POPs will be 15%-20%. High temperatures will be well above normal and a few spots across the south could reach 80. && .LONG TERM... (Saturday night through Thursday) Issued at 1218 AM CST Fri Dec 12 2025 On Sunday the next cold front will will move through. There may be enough moisture in the Rio Grande region to generate some showers or even a thunderstorm, but chances are only 20%-40% during the day. There will be breezy northeasterly winds behind the front Sunday afternoon. Temperatures will be cooler again Sunday and Monday. Tuesday an upper level shortwave trough will move over the region. The blended model solution is still dry as this feature passes. Yesterday the deterministic global models were showing some rain, but they have trended drier. Temperatures will warm over the last few days of the forecast reaching well above normal by Thursday. && .AVIATION... (06Z TAFS) Issued at 1218 AM CST Fri Dec 12 2025 Very low stratus and fog will spread across most areas overnight into early Friday morning. IFR/LIFR CIGs are expected with TEMPOs LIFR CIGs and VLIFR to IFR VSBYS at the I-35 sites. CIGs/VSBYs slowly improve late morning to VFR by mid afternoon, then IFR CIGs return Friday night. KDRT remains VFR through Friday evening. Light winds prevail at less than 10 KTs. && .PRELIMINARY POINT TEMPS/POPS... Austin Camp Mabry 74 56 73 48 / 0 10 10 10 Austin Bergstrom Intl Airport 74 57 74 48 / 0 10 10 10 New Braunfels Muni Airport 73 57 75 50 / 0 10 10 10 Burnet Muni Airport 73 51 71 43 / 0 0 0 0 Del Rio Intl Airport 77 51 76 50 / 0 0 0 0 Georgetown Muni Airport 74 54 73 45 / 0 10 0 10 Hondo Muni Airport 72 55 76 53 / 0 10 0 0 San Marcos Muni Airport 74 57 75 49 / 0 10 10 10 La Grange - Fayette Regional 73 59 75 51 / 0 10 20 20 San Antonio Intl Airport 72 59 76 54 / 0 10 10 0 Stinson Muni Airport 72 61 77 56 / 0 10 10 0 && .EWX WATCHES/WARNINGS/ADVISORIES... Dense Fog Advisory until 9 AM CST this morning for TXZ187- 189>194-203>209-218>225-228. && $$ SHORT TERM...04 LONG TERM....05 AVIATION...04