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Chance of isolated showers today

September 1, 2009 | 10:20 am

Although it felt cooler this morning and firefighters were hopeful, weather forecasters said warm, dry conditions are expected to prevail across the Southland today, with a slight chance of isolated showers and gusty winds developing.

Moisture moving north from Mexico, unrelated to Hurricane Jimena south of Baja, may trigger a 20% chance of thunderstorms and isolated showers over the mountains and deserts of Los Angeles and San Bernardino counties. The system also may produce lighting and winds with gusts of 30 to 35 mph, said David Sweet, a meteorologist with the National Weather Service. Temperatures in the mountains today will range from the mid-90s to 100 in the lower elevations and the mid-80s to mid-90s in higher elevations.

Inland temperatures should reach the mid-90s this afternoon; high in the 70s were expected along the beaches. A cooling trend should develop later in the week, he said

At the Station fire command center at Hansen Dam, incident meteorologist Matt Mehle said there will be a slight warming trend today combined with moisture moving in from the southeast, providing a chance for afternoon and evening isolated dry thunderstorms, which could produce gusty, erratic winds.

The western flank of the Station fire in the San Gabriel Mountains should push toward Little Rock because of southwestern winds, according to the fire behavior report released this morning. On the eastern flank, the fire is expected to continue to spread "actively" as it moves beyond Mt. Wilson.

Fire behavior specialists said the fire will continue to spread southwest toward subdivisions along the 210 Freeway from Altadena to Little Tujunga.

-- Corina Knoll at Hansen Dam and Ruben Vives