10:15 p.m. update: In total, Travis County received about 2-3 inches of rain on Friday, rain gauge data shows.

Travis County and its surrounding counties remain under a flash flood watch until noon Saturday.

The Austin-Bergstrom International Airport broke a daily rainfall record after receiving 3.23 inches of rain Friday.

Many low-water crossings continue to be closed in Travis, Williamson, Hays and Bastrop counties. Police have shut down Bee Cave Road in Rollingwood in two separate locations; Bluff Springs Road is closed at Onion Creek; and several streets in Cedar Park that cross a creek west of Peggy Garner Park are closed. For a full, regularly updated list, see www.atxfloods.com/closures.

Expect light rain to continue falling through the night and into Saturday morning. The chances for rain drop significantly — down to 20 percent — beginning at 6 a.m. Saturday.

4 p.m. update: An urban and small stream flood advisory has been issued for parts of Travis, Bastrop, Hays, Caldwell, Guadalupe and Comal counties until 6:45 p.m. Friday, the National Weather Service said.

At 3:46 p.m., authorities reported that heavy rain was causing urban and small stream flooding in Hays and Caldwell counties, where many low water crossings were closed because more than an inch of rain had fallen, the weather service said.

Some of the communities affected include Austin and Lakeway in Travis County; New Braunfels and Canyon Lake in Comal County; Wimberley, San Marcos, Buda, Kyle and Dripping Springs in Hays County; Seguin in Guadalupe County; Lockhart in Caldwell County; and Bastrop in Bastrop County.

3:05 p.m. update: A flash flood watch remains in effect for several Central Texas counties, including Travis, Williamson, Hays, Bastrop, Caldwell, Burnet, Llano and Blanco counties, until noon Saturday.

During a flood watch, forecasters say, conditions may develop that can lead to flash flooding, so residents in the affected areas should monitor weather updates and be prepared to take action to save lives or property.

The latest weather service forecast calls for widespread rainfall amounts of 1 to 4 inches across the eastern Hill Country and the I-35 corridor, from San Antonio through Austin to Georgetown.

Some of highest rainfall totals so far on Friday have been recorded along the Travis-Bastrop county line, according to rain gauges monitored by the Lower Colorado River Authority:

1.64 inches at Hornsby Bend in eastern Travis County2.54 inches at Dry Creek near Elroy in southeast Travis County2.11 inches at the Colorado River near Webberville in eastern Travis County2.65 inches at Wilbarger Creek near Elgin in western Bastrop County2.33 inches at Cedar Creek in western Bastrop County

8:10 a.m. update: The showers expected to soak the Austin metro area on Friday have already broken at least one daily rainfall record in town.

According to the National Weather Service, Austin-Bergstrom International Airport gauges have already measured at least 1.19 inches of rain, breaking the previous record of 0.57 inch set there on this date in 1960.

Forecasters said the cumulative rainfall total for Friday at the airport will definitely increase throughout the day.

The latest weather service forecast calls for widespread rainfall amounts of 2 to 4 inches across the eastern Hill Country and the I-35 corridor, from San Antonio through Austin to Georgetown. Some rainfall totals could reach 4 to 6 inches in areas east of I-35, forecasters said.

A flash flood watch will be in effect at noon Friday for several Central Texas counties, including Travis, Williamson, Hays, Bastrop, Caldwell, Burnet and Blanco counties. The flood watch is expected to last until the rains exit the region by Saturday morning.

Some of highest rainfall totals so far have been recorded just east of the airport, along the Travis-Bastrop county line, according to rain gauges monitored by the Lower Colorado River Authority:

1.25 inches at Onion Creek and U.S. 183 in southeast Travis County1.7 inches at Dry Creek near Elroy in southeast Travis County1.14 inches at the Colorado River near Webberville in eastern Travis County1.61 inches at Wilbarger Creek near Elgin in western Bastrop County1.3 inches at Cedar Creek in western Bastrop County

Friday forecast for Austin: It's rare that a meteorologist give you a 100 percent chance of anything happening. But the National Weather Service is going out on that limb, forecasting a 100 percent chance of rain all day and into the evening in Austin, which could lead to flash flooding in some spots.

Heavy rainfall is likely to drench the eastern Hill Country and urban areas along and east of the Interstate 35 corridor, the weather service said, with the worst of it hitting in the afternoon and evening.

A combination of soil saturated by unseasonably heavy autumn rain and dormant winter vegetation means rainwater won't be absorbed as well and quick runoff is expected with heavier storms. The prospect of flooding has prompted the weather service to issue a flash flood watch, starting at noon Friday, for several Central Texas counties, including Travis, Williamson, Hays, Bastrop, Caldwell, Burnet and Blanco counties. The flood watch is expected to last until the rains exit the region by Saturday morning.

During a flood watch, forecasters say, conditions may develop that can lead to flash flooding, so residents in the affected areas should monitor weather updates and be prepared to take action to save lives or property.

So how much rain are we talking about on Friday? The latest weather service forecast calls for widespread rainfall amounts of 2 to 4 inches across the eastern Hill Country and the I-35 corridor, from San Antonio through Austin to Georgetown. Some rainfall totals could reach 4 to 6 inches in areas east of I-35, forecasters said.

The heavy rainfall could overwhelm low water crossings, creeks and other tributaries feeding Central Texas waterways, the weather service said, and river flood warnings were preemptively issued for Saturday for sections of the:

Colorado River in Bastrop CountySouth Fork San Gabriel River in Williamson CountySan Marcos River in Caldwell CountyPedernales River in Blanco CountyOnion Creek in southern Travis County.

Forecasters said the likelihood of severe weather in Central Texas was low, but if any severe weather did arise, they said it would most likely be in the form of damaging straight-line winds.

A cold front moving through the region on Friday will help keep Austin temperatures below 54, a good 10 degrees cooler than normal. Overnight temperatures could sink as low as 44, with biting north winds of 10 to 15 mph.

Looking ahead at the weather service's extended forecast, Austin can expect the rain to clear out Saturday morning and sunshine to return in full by Sunday. But temperatures will take a more chilly turn before warming up mid-week:

Saturday: Heavy rain before 7 a.m., high near 50. Mostly cloudy at night with a low around 39. North-northwest winds of 10 to 15 mph all day.

Sunday: Partly sunny with a high near 52. At night, mostly clear, with a low around 35. North-northwest winds of up to 10 mph continue.

Monday: Sunny with a high near 56. Then, mostly clear at night with a low around 35. Cool north-northeast breezes become warmer east-southeast winds after midnight.

Tuesday: Sunny with a high near 58. Balmy south-southeast winds from the Gulf of Mexico arrive in the afternoon. Mostly cloudy at night with a low around 42.

Wednesday: A 20 percent chance of rain with a high near 66. Rain chances persist at night with a low around 50.