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A flash-flood warning issued for local mountains

Posted: July 13, 2012 2:00 a.m.
Updated: July 13, 2012 2:00 a.m.

 

After the Santa Clarita Valley experienced triple-digit temperatures throughout the week and early-morning showers, a flash-flood warning was issued Thursday for local mountains, according to weather officials.

“There’s a flash-flood watch for the Los Angeles County mountains and Antelope Valley, and that’s just because there’s going to be some thunderstorms in the area,” said Scott Sukup, a National Weather Service meteorologist.

“And they will be slow moving — so they could dump a lot of rain in a short period of time.”

The chance of precipitation will linger until Saturday, Sukup said, adding that the forecast change has eliminated the red-flag heat warning that was issued earlier in the week. SCV temperatures surpassed 105 degrees on Tuesday and Wednesday. The high Thursday was 97.

The small amount of precipitation is a result of upper-level air currents from the Gulf of California, which is typical for this time of year as fall creeps closer, Sukup added.

“We’re getting into some of the summer monsoon moisture from the southeast coming toward us,” Sukup said.

Despite the moisture, which has had a significant impact on local humidity levels, air patterns are expected to bring slightly cooler temperatures.

“There’s also an upper-level low-pressure system coming in from the north, and that’s going to deepen the marine layer and increase the onshore flow (of cool air),” Sukup said.

However, temperatures still will hit the triple digits in certain inland areas.

“Whatever we’re gaining (by slightly cooler temperatures), the increasing humidity is going to make it feel very uncomfortable,” said Rich Thompson, a National Weather Service meteorologist.

Areas of Ventura County and near the Santa Clarita Valley got some lightning and a little rain before dawn as a front from thunderstorms in Arizona tracked across the desert, Thompson said.

The Associated Press contributed to this report.

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