* WHAT...***POWERFUL DAMAGING WINDS EXPECTED!*** For the mountains and foothills, northeast winds increasing to 35 to 50 mph with widespread damaging gusts of 60 to 80 mph expected. Isolated gusts 80 to 100 mph expected in most wind-prone mountain locations, such as the San Gabriels, Santa Susanas, western Santa Monicas, and southern Ventura mountains adjacent to the Highway 126 corridor. For the coasts and valleys, northeast to east winds increasing to 25 to 40 mph with damaging gusts of 50 to 70 mph, strongest along the Highway 118, 126, and 210 corridors.

* WHERE...A portion of southwest California.

* WHEN...Until 2 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. Widespread power outages are possible. Travel will be difficult, especially for high profile vehicles.

***THIS IS A PARTICULARLY DANGEROUS SITUATION (PDS) RED FLAG WARNING FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES!***

***POWERFUL DAMAGING WINDS EXPECTED!***

...PARTICULARLY DANGEROUS SITUATION (PDS) RED FLAG WARNING IN EFFECT NOON TODAY UNTIL 10 AM TUESDAY DUE TO DAMAGING SANTA ANA WINDS AND VERY LOW HUMIDITIES FOR THE FOLLOWING AREAS: SANTA CLARITA VALLEY / VENTURA COUNTY BEACHES / VENTURA COUNTY INLAND COAST / CENTRAL VENTURA COUNTY VALLEYS / MALIBU COAST FOR MALIBU AND POINTS WEST / WESTERN SANTA MONICA MOUNTAINS / CALABASAS AND AGOURA HILLS / WESTERN SAN FERNANDO VALLEY FOR RESEDA AND POINTS NORTH / EASTERN SAN FERNANDO VALLEY FOR BURBANK AND POINTS NORTH / SOUTHEASTERN VENTURA COUNTY VALLEYS / SANTA SUSANA MOUNTAINS / VENTURA COUNTY MOUNTAINS / INTERSTATE 5 CORRIDOR / SAN GABRIEL MOUNTAINS AND HIGHWAY 14 CORRIDOR / SAN GABRIEL VALLEY ALONG AND NORTH OF HIGHWAY 210 INCLUDING ALTADENA AND GLENDORA -- AND RED FLAG WARNING DUE TO STRONG SANTA ANA WINDS AND LOW HUMIDITIES FOR ALL OTHER TIMES 8 AM MONDAY UNTIL 10 PM TUESDAY IN THESE SAME AREAS AND ALSO FOR REMAINING PORTIONS OF THESE ZONES OUTSIDE OF THE PDS-DESIGNATED AREAS...

...RED FLAG WARNING IN EFFECT UNTIL 2 PM PST TUESDAY FOR STRONG SANTA ANA WINDS AND LOW RELATIVE HUMIDITY FOR EASTERN SANTA MONICA MOUNTAINS / CATALINA AND SANTA BARBARA ISLANDS / PALOS VERDES HILLS / ANTELOPE VALLEY FOOTHILLS / SAN MIGUEL AND SANTA ROSE ISLANDS / SANTA CRUZ AND ANACAPA ISLANDS...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES...

.Very strong Santa Ana winds are developing today and peaking this afternoon into Tuesday morning. Humidities will drastically lower to the single digits. Along with the extremely dry fuels, this will create Extremely Critical fire-weather conditions and rapid fire spread with any fires. Thereafter, with dry conditions lasting through at least Thursday, and additional rounds of enhanced offshore flow likely Wednesday night through Thursday. For this reason a Fire Weather Watch is in effect Tuesday night through Thursday.

***THIS IS A PARTICULARLY DANGEROUS SITUATION (PDS) RED FLAG WARNING FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES!***

***POWERFUL DAMAGING WINDS EXPECTED!***

...PARTICULARLY DANGEROUS SITUATION (PDS) RED LAG WARNING IN EFFECT NOON MONDAY UNTIL 10 AM TUESDAY DUE TO DAMAGING SANTA ANA WINDS AND VERY LOW HUMIDITIES FOR THE FOLLOWING AREAS: SANTA CLARITA VALLEY / VENTURA COUNTY BEACHES / VENTURA COUNTY INLAND COAST / CENTRAL VENTURA COUNTY VALLEYS / MALIBU COAST FOR MALIBU AND POINTS WEST / WESTERN SANTA MONICA MOUNTAINS / CALABASAS AND AGOURA HILLS / WESTERN SAN FERNANDO VALLEY FOR RESEDA AND POINTS NORTH / EASTERN SAN FERNANDO VALLEY FOR BURBANK AND POINTS NORTH / SOUTHEASTERN VENTURA COUNTY VALLEYS / SANTA SUSANA MOUNTAINS / VENTURA COUNTY MOUNTAINS / INTERSTATE 5 CORRIDOR / SAN GABRIEL MOUNTAINS AND HIGHWAY 14 CORRIDOR / SAN GABRIEL VALLEY ALONG AND NORTH OF HIGHWAY 210 INCLUDING ALTADENA AND GLENDORA -- AND RED FLAG WARNING DUE TO STRONG SANTA ANA WINDS AND LOW HUMIDITIES FOR ALL OTHER TIMES UNTIL 10 PM TUESDAY IN THESE SAME AREAS AND ALSO FOR REMAINING PORTIONS OF THESE ZONES OUTSIDE OF THE PDS-DESIGNATED AREAS...

...RED FLAG WARNING IN EFFECT UNTIL 2 PM PST TUESDAY FOR STRONG SANTA ANA WINDS AND LOW RELATIVE HUMIDITY FOR EASTERN SANTA MONICA MOUNTAINS / CATALINA AND SANTA BARBARA ISLANDS / PALOS VERDES HILLS / ANTELOPE VALLEY FOOTHILLS / SAN MIGUEL AND SANTA ROSE ISLANDS / SANTA CRUZ AND ANACAPA ISLANDS...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES...

* WINDS...For the PDS RED FLAG WARNING -- ***POWERFUL DAMAGING WINDS EXPECTED!*** For the mountains and foothills, northeast winds increasing to 35 to 50 mph with widespread damaging gusts of 60 to 80 mph expected. Isolated gusts 80 to 100 mph expected in most wind-prone mountain locations, such as the San Gabriels, Santa Susanas, western Santa Monicas, and southern Ventura mountains adjacent to the Highway 126 corridor. For the coasts and valleys, northeast to east winds increasing to 25 to 40 mph with damaging gusts of 50 to 70 mph, strongest along the Highway 118, 126, and 210 corridors.

* RELATIVE HUMIDITY...Daily minimums of 5 to 15 percent with very poor overnight recoveries.

* IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior and rapid fire growth, which would threaten life and property.

***THIS IS A PARTICULARLY DANGEROUS SITUATION (PDS) RED FLAG WARNING FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES!***

***POWERFUL DAMAGING WINDS EXPECTED!***

...PARTICULARLY DANGEROUS SITUATION (PDS) RED FLAG WARNING IN EFFECT NOON TODAY UNTIL 10 AM TUESDAY DUE TO DAMAGING SANTA ANA WINDS AND VERY LOW HUMIDITIES FOR THE FOLLOWING AREAS: SANTA CLARITA VALLEY / VENTURA COUNTY BEACHES / VENTURA COUNTY INLAND COAST / CENTRAL VENTURA COUNTY VALLEYS / MALIBU COAST FOR MALIBU AND POINTS WEST / WESTERN SANTA MONICA MOUNTAINS / CALABASAS AND AGOURA HILLS / WESTERN SAN FERNANDO VALLEY FOR RESEDA AND POINTS NORTH / EASTERN SAN FERNANDO VALLEY FOR BURBANK AND POINTS NORTH / SOUTHEASTERN VENTURA COUNTY VALLEYS / SANTA SUSANA MOUNTAINS / VENTURA COUNTY MOUNTAINS / INTERSTATE 5 CORRIDOR / SAN GABRIEL MOUNTAINS AND HIGHWAY 14 CORRIDOR / SAN GABRIEL VALLEY ALONG AND NORTH OF HIGHWAY 210 INCLUDING ALTADENA AND GLENDORA -- AND RED FLAG WARNING DUE TO STRONG SANTA ANA WINDS AND LOW HUMIDITIES FOR ALL OTHER TIMES 8 AM MONDAY UNTIL 10 PM TUESDAY IN THESE SAME AREAS AND ALSO FOR REMAINING PORTIONS OF THESE ZONES OUTSIDE OF THE PDS-DESIGNATED AREAS...

...RED FLAG WARNING IN EFFECT UNTIL 2 PM PST TUESDAY FOR STRONG SANTA ANA WINDS AND LOW RELATIVE HUMIDITY FOR EASTERN SANTA MONICA MOUNTAINS / CATALINA AND SANTA BARBARA ISLANDS / PALOS VERDES HILLS / ANTELOPE VALLEY FOOTHILLS / SAN MIGUEL AND SANTA ROSE ISLANDS / SANTA CRUZ AND ANACAPA ISLANDS...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES...

.Very strong Santa Ana winds are developing today and peaking this afternoon into Tuesday morning. Humidities will drastically lower to the single digits. Along with the extremely dry fuels, this will create Extremely Critical fire-weather conditions and rapid fire spread with any fires. Thereafter, with dry conditions lasting through at least Thursday, and additional rounds of enhanced offshore flow likely Wednesday night through Thursday. For this reason a Fire Weather Watch is in effect Tuesday night through Thursday.

***THIS IS A PARTICULARLY DANGEROUS SITUATION (PDS) RED FLAG WARNING FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES!***

***POWERFUL DAMAGING WINDS EXPECTED!***

...PARTICULARLY DANGEROUS SITUATION (PDS) RED LAG WARNING IN EFFECT NOON MONDAY UNTIL 10 AM TUESDAY DUE TO DAMAGING SANTA ANA WINDS AND VERY LOW HUMIDITIES FOR THE FOLLOWING AREAS: SANTA CLARITA VALLEY / VENTURA COUNTY BEACHES / VENTURA COUNTY INLAND COAST / CENTRAL VENTURA COUNTY VALLEYS / MALIBU COAST FOR MALIBU AND POINTS WEST / WESTERN SANTA MONICA MOUNTAINS / CALABASAS AND AGOURA HILLS / WESTERN SAN FERNANDO VALLEY FOR RESEDA AND POINTS NORTH / EASTERN SAN FERNANDO VALLEY FOR BURBANK AND POINTS NORTH / SOUTHEASTERN VENTURA COUNTY VALLEYS / SANTA SUSANA MOUNTAINS / VENTURA COUNTY MOUNTAINS / INTERSTATE 5 CORRIDOR / SAN GABRIEL MOUNTAINS AND HIGHWAY 14 CORRIDOR / SAN GABRIEL VALLEY ALONG AND NORTH OF HIGHWAY 210 INCLUDING ALTADENA AND GLENDORA -- AND RED FLAG WARNING DUE TO STRONG SANTA ANA WINDS AND LOW HUMIDITIES FOR ALL OTHER TIMES UNTIL 10 PM TUESDAY IN THESE SAME AREAS AND ALSO FOR REMAINING PORTIONS OF THESE ZONES OUTSIDE OF THE PDS-DESIGNATED AREAS...

...RED FLAG WARNING IN EFFECT UNTIL 2 PM PST TUESDAY FOR STRONG SANTA ANA WINDS AND LOW RELATIVE HUMIDITY FOR EASTERN SANTA MONICA MOUNTAINS / CATALINA AND SANTA BARBARA ISLANDS / PALOS VERDES HILLS / ANTELOPE VALLEY FOOTHILLS / SAN MIGUEL AND SANTA ROSE ISLANDS / SANTA CRUZ AND ANACAPA ISLANDS...

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY EVENING THROUGH THURSDAY EVENING FOR GUSTY SANTA ANA WINDS AND VERY LOW RELATIVE HUMIDITY FOR A LARGE PORTION OF LOS ANGELES AND VENTURA COUNTIES...

* WINDS...For the PDS RED FLAG WARNING -- ***POWERFUL DAMAGING WINDS EXPECTED!*** For the mountains and foothills, northeast winds increasing to 35 to 50 mph with widespread damaging gusts of 60 to 80 mph expected. Isolated gusts 80 to 100 mph expected in most wind-prone mountain locations, such as the San Gabriels, Santa Susanas, western Santa Monicas, and southern Ventura mountains adjacent to the Highway 126 corridor. For the coasts and valleys, northeast to east winds increasing to 25 to 40 mph with damaging gusts of 50 to 70 mph, strongest along the Highway 118, 126, and 210 corridors.

* RELATIVE HUMIDITY...Daily minimums of 5 to 15 percent with very poor overnight recoveries.

* IMPACTS...If fire ignition occurs, conditions are favorable for extreme fire behavior and rapid fire growth, which would threaten life and property.

* WHAT...The South Coast AQMD has issued an air quality alert due to harmful levels of windblown dust and ash.

* WHERE...in the South Coast Air Basin, Coachella Valley, and eastern Riverside County. Pollution levels can vary by time and location depending on emissions and local weather conditions.

* WHEN...10 AM Monday through 10 PM Tuesday.

* IMPACTS...Particle pollution can get deep into the lungs and cause serious health problems such as asthma attacks, heart and lung disease symptoms, and increased risk of respiratory infections. Everyone can be affected, but sensitive groups such as people with lung or heart disease, older adults, people who are pregnant, children, and those who spend a lot of time outdoors are at greater risk.