Dense fog advisory in effect until 10 a.m.; record heat possible ahead of cold front

National Weather Service

National Weather Service

8 a.m. update: A dense fog advisory is in effect until 10 a.m. for the Austin metro area, the National Weather Service said.

7:30 a.m. update: A red flag warning will be in effect Monday afternoon and on Tuesday from 1 p.m. to 6 p.m. each day for western parts of the Edwards Plateau, according to the National Weather Service. A fire weather watch also will be in effect for most of the Hill Country from 1 p.m. to 6 p.m. on Tuesday.

Although gusty south winds of 15 to 30 mph are expected in the Hill Country Monday afternoon, the gusts will continue from the northwest, blowing at 15 to 30 mph on Tuesday in the wake of a cold front, the weather service says.

In the next 48 hours, relative humidity in the Hill Country will drop below 20 percent around 1 p.m. each afternoon, and bottom out between 15 and 20 percent by mid-afternoon, the weather service says. As a result, grasses can ignite easily and fire can spread quickly. Humidity and plant moisture are higher to the east, the weather service says, and winds will likely be a little lower.

Monday forecast for Austin: We could break another daily heat record on Monday, but enjoy it while it lasts: the unseasonal warmth will end once a cold front blows through the Austin area late Monday, the National Weather Service says.

Austin already broke a daily heat record on Sunday as temperatures hit 86 degrees at Camp Mabry in Central Austin. The weather service outlook for Monday calls for high temperatures to hit 81, only two degrees shy of the record high for Feb. 1 set in 1963. But you never know, the record might fall: Austin weather has a way of surprising us all the time.

In the meantime, patchy fog will plague morning commuters until around 9 a.m., the weather service said. But sunshine will emerge and dominate the forecast for the rest of the week.

But Monday also will see winds pick up as warm southeast winds shift and start coming from the south at 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

However, the high winds, dry air and near-record heat also mean potential wildfire danger in the western parts of the Hill Country on Monday and into Tuesday.

Patchy fog resumes at night under otherwise partly cloudy skies and a low temperature around 53. South-southeast winds of 5 to 15 mph become northwest gusts after midnight as the cold front blows through the area.

Once the cold front arrives in Austin sometime around midnight, the cold air will drag daily temperatures back to the upper 50s and near-freezing temperatures at night on Wednesday and Thursday.

Wednesday’s forecast calls for a high near 56, but under sunny skies. At night, the low temperature will drop to around 34.
Sunshine continues Thursday, with high temperatures near 58. The nighttime low is expected to fall again to around 34.