Outlook for Tuesday

(Afternoon buildups over the San Gabriels)

Easterly flow of moist air will continue the risk of afternoon and evening showers and thunderstorms over the mountains of Los Angeles, San Bernardino, Riverside and San Diego counties...and the deserts of San Bernardino, Riverside and San Diego counties.

Meanwhile... fairly strong onshore flow will continue the extensive marine layer along the coast and the coastal valleys on Tuesday...especially during the night and morning hours.

Seasonal temperatures can be expected... but it will feel a bit muggy.

Monsoonal flow to increase by mid-week

(Cumulonimbus clouds)

Moisture in easterly flow aloft will likely produce a few afternoon/evening showers & thunderstorms over the mountains of San Bernardino...Riverside and San Diego counties on Monday.

These chances will increase by mid-week over most mountain and desert areas of the southland.

Meanwhile... An onshore flow will continue the marine layer along the coast and coastal valley during the night and morning hours.

Sunday's weather across the southland

Other then some morning low clouds and fog along the coast and in the coastal valleys. Skies will be mostly sunny to partly cloudy skies on Sunday.

There will be some areas of smoke from the Zaca Brushfire in Santa Barbara county drifting eastward across Ventura county.

There is a continue risk of afternoon thunderstorms over the mountains of San Bernardino and Riverside counties.

Temperatures will range from the lower 70s at the coast to the lower to middle 80s in mid-city LA and inland OC.

The valleys will warm into the 90s to the lower 100s...with the warmest readings in the valleys of the IE.

Saturday's weather outlook

Partly cloudy skies and warm temperatures expected across the southland on Saturday.
There will be a slight chance of afternoon and evening thunderstorms over the mountains and deserts of San Bernardino, Riverside and San Diego counties... due to lingering monsoonal moisture and an unstable airmass.

Here's the forecast high temperatures for a few selected cities across SoCal...

Burbank: lower 90s
Woodland Hills: near 101
Thousand Oaks: upper 80s to around 90
Mount Wilson: upper 80s
Lancaster: near 101
Long Beach: middle to upper 80s
Oxnard: upper 70s
Santa Barbara (downtown): around 75
Anaheim: upper 80s to around 90
San Diego (downtown): upper 70s
Ontario: middle 90s
Temecula: middle 90s
Hemet: around 100

Locally breezy conditions are likely along the foothills, mountains and high deserts Saturday afternoon.

Gradual decrease in tstorms over the mountains/deserts through the weekend

***Updated at: 11:45am/pdt, Friday, July 27th, 2007***

There will be gradual decrease thunderstorm activity over the next few days over the southland mountain and desert areas as high pressure begins to move east and airmass over the region dries out.

For the next few days... look for a few afternoon/evening thunderstorms... mainly from the San Bernardino range southward with an isolated thunderstorm possible over the the deserts.

For Friday, theres a risk for locally heavy rains over the southern mountains and some desert areas. Local flash flooding is possible through early Friday evening.


Otherwise... mostly sunny to partly cloudy skies.

Patchy late night and morning low clouds and fog along the coast.

Temperatures will continue to be above seasonal normals for most areas through the weekend.

Warmer and sticky conditions across the region

Warm and humid conditions expected through the upcoming weekend and even early next as the the monsoon flow continues.

Look for warmer temperatures areawide along with high dewpoints. Mostly sunny but hazy skies except partly cloudy during the afternoon and evening hours over the mountains and deserts with a continued risk of isolated thunderstorms.

The warmest days appear to be Friday and Saturday with temperatures reaching or exceeding the 100 degree mark in the interior valley locations. Meanwhile the coastal valleys will see daytime temperatures in the 90s.

The coastal plain will see temperatures in the 70s along the immediate coast to the 80s inland.

Risk of afternoon/evening tstorms over parts of SoCal

Moist/unstable area will once again produce afternoon and evening showers/tstorms over the southern California mountain and desert areas on Wednesday.

The greatest risk of tstorms will occur over the mountains of San Bernardino...Riverside and San Diego counties.

Elsewhere... it will be a muggy Wednesday for most southern Californians with near seasonal temperatures.

Monsoonal flow continues to the risk of storms

(Morning clouds - July 21st, 2007)

Monsoon moisture will continue the chances for mainly afternoon and evening showers or thunderstorms mostly over the mountains and deserts on Tuesday.

The best chance of the storms will be over the mountains of San Bernardino, Riverside and San Diego counties...and the deserts of San Bernardino county.

In the above mentioned areas... there is a threat of locally heavy downpours which will increase the risk of flash flooding.

Unsettled Monday for some southern Californians

(Cumulonimbus clouds)

***Updated: 4:32am/pdt, Monday, July 23rd, 2007***

Moist and unstable air is over the southland on Monday.

This will result in isolated to scattered showers or thunderstorms.

The best chance of thunderstorms will occur over the mountains (especially the mountains of San Diego county).

Some thunderstorms will have the capability or producing... locally gusty winds to around 40 mph... brief moderate downpours... small hail and frequent cloud-to-ground lightning stikes.

There is a greater risk of thunderstorms over the mountains and deserts on Tuesday with high potential of heavy rains and possible flash flooding...especially mountains/deserts of San Bernardino...Riverside and San Diego counties.

Monsoon flow slowly increasing over the southland

(Pre dawn time lapse, 5:15 to 5:45am, Saturday, July 21st, 2007)

A southeasterly flow will continue to slowly increase the chances of afternoon and evening showers over the southland mountains and deserts into early this week.

For Sunday... the best chances of tstorm activity will be over the mountains/deserts of San Bernardino, Riverside and San Diego counties.

By Monday afternoon... the tstorm coverage will expand west/northwestward into the mountains of Los Angeles/Ventura counties and the Antelope Valley.

Don't be too surprise (especially on Monday) to see a stray tstorm make into some inland valley areas.

Increasing moisture over the southland mountains/deserts this weekend

(Cumulonimbus clouds - at sunset)

Moisture caught up in a southeast flow over the southern/eastern portions of southern California will lead to a small chance of afternoon/evening showers or thunderstorms this weekend.

This flow may increasing by the early part of the upcoming week... due to several easterly wave embedded in the southeast flow.

Still the best chances of afternoon/evening showers or thunderstorms will be the far south and eastern sections.

Increasing monsoonal flow this weekend into next week.

(Decaying thundershower)

Increasing moisture will lead to an increasing threat of mainly afternoon/evening showers and thunderstorms beginning Friday and lasting through much of next week over the southland mountains and deserts.

Come early to mid part of next week... there will be a threat of flash flooding over the mountains and deserts (especially San Bernardino, Riverside and San Diego counties).

With this flow... expect and a decrease in the marine layer along the coast with warmer temperatures inland areas. Temperatures may reach or exceed the 100 degree mark over the interior valleys this weekend and early next week.

The coastal plain will see near to slightly above seasonal normals.

Developing monsoon patteren this weekend into early next week?

Circulation around a high pressure near the Four Corners region bring an increase of moisture over the southland this weekend and early next week.

Look for a gradual increase in humidities beginning Saturday along with an increasing threat of afternoon/evening thunderstorms primarily over the mountains and deserts.

Meanwhile temperatures over the coastal and valley areas will warm a bit through the period.

Mid week southland weather outlook

(Altostratus clouds at sunset)

A weakening trough of low pressure will continue to the onshore flow over the southland for the mid week period.

This will result in morning coastal/valley low clouds and fog...otherwise mostly sunny skies.

Locally breezy conditions can be expected during the afternoon and evening hours over the mountains and deserts.

Late this week through the weekend... high pressure over the Rockies will expand westward resulting in more sun than clouds along the coast and warmer temperatures...especially areas away from the immediate coast.

Gloomy Tuesday for some

A weak "eddy" circulation will continue to produce extensive low clouds and fog along the coastal plain and most valley locations during Tuesday morning...then skies will become mostly sunny during the afternoon hours.

Daytime high temperatures will range from the upper 60s to the middle 70s along the immediate coast to the 80s in the coastal valleys...and in the upper 80s to the middle 90s in the valleys of the Inland Empire.

For Downtown Los Angeles... temperatures will reach into the upper 70s to around 80 during the early to mid afternoon hours Tuesday.

Outlook for Monday

(A lone morning cloud)

Monday's overview...

Skies across the southland on Monday will be mostly sunny to partly cloudy skies...except for morning low clouds and fog along the coastal plain and in the coastal valleys.

Few forecast daytime temperature forecasts...

Mid city Los Angeles: lower to middle 80s
Lompoc: around 80
Newhall: middle 90s
Palmdale: around 100
Downtown San Diego: lower to middle 70s
Ontario: middle 90s
Temecula: near 90
Hemet: near 100
Wrightwood: around 85
Thermal: around 108
Barstow: around 107
Twentynine Palms: around 105
Imperial: around 109
Mojave: near 100
Tehachapi: middle 80s
Bakersfield: upper 90s to around 100

Outlook for rest of the weekend

(Pre-sunrise: Saturday, July 14th, 2007)

Partly cloudy skies are on tap for Sunday...as a moderate flow of mid to high level moisture continues to flow in from the south/southeast.

Meanwhile... a weak "eddy" will continue the morning low clouds and fog along the coast.

Temperatures will warm in the 90s to the lower 100s in the valleys...warmest in the valleys of the IE.

The coastal plain will see temperatures reach maximums in the 80s Sunday afternoon (except upper 60s to the middle 70s at the immediate coast).

There will be a slight risk of mainly afternoon showers and or thunderstorms over the mountains...mainly Santa Barbara...Ventura...Los Angeles and San Diego counties...and in the Antelope Valley.

Saturday's weather

(Avalon Harbor - August 1983)

A moderate monsoonal flow will produce a few isolated thunderstorms over the southern California mountains this weekend.

Meanwhile... the rest of the southland will see mostly sunny to partly cloudy skies with warm temperatures.

Here a couple forecasts for selected events across the southland on Saturday.

Orange County Fair
-Costa Mesa:

Partly cloudy skies
Highs: lower to middle 80s



Temecula Valley International Jazz Fest
-Temecula:

Partly cloudy skies
Highs: middle 90s


For the rest of the southland...
Beaches: upper 60s to the upper 70s
Downtown Los Angeles/inland OC: middle to upper 80s
Coastal and interior valleys: upper 80s to the lower 100s
Mountains: 80s and 90s
High Deserts: upper 90s to around 105
Low Deserts: 105 to 110

Warm temperatures and a risk of thunderstorms through the weekend

(A few pre-dawn clouds)

An increasing in moisture through the weekend will lead to a slight chance of mainly afternoon/evening showers or thunderstorms over the southland mountain and desert areas. There is a very small risk of one of these storms making westward into the valleys (mainly Inland Empire and San Diego county).

Meanwhile... temperatures will be on the warm side for the next couple of days as the air flow turns more off shore.

Temperatures may reach or exceed the 100 degree mark in the interior valleys.

Thursday outlook

(Avalon, Catalina Island - August 1983)

High pressure aloft and a dry southwest flow is currently over the southland.

This will result in mostly sunny skies...except patchy morning low clouds and fog along portions of the coastal plain on Thursday.

Meanwhile... a return to more muggy southeast flow is on tap for Friday and Saturday. This pattern will lead to warmer temperatures and a chance of mainly afternoon/evening thunderstorms over the mountains and deserts...with even a slight risk of a storm drifting westward off the mountains into some of the inland valleys.

Dry thunderstorms possible over some mountain and desert areas on Wednesday

(Storm clouds/marble overlay)

Wednesday's storm focus will be on the mountains of San Bernardino, Riverside and San Diego counties. There's a slight possibility of a dry storm or two over the far eastern mountains of L.A. county and the Antelope valley.

The storms over the above mentioned areas will likely produce... gusty winds to around 40 mph and dangerous cloud to ground lightning strikes... but very little or no in the way of rainfall.

Meanwhile... over the coastal plain and the valleys (including Los Angeles). Expect... gloomy day... with morning low clouds and fog...then only partial afternoon clearing to near the coast.

Slight risk of thunderstorms on Tuesday

(Current Wator Vapor Imagery)

***Updated: 4:33pm/pdt, Tuesday, July 10th, 2007***

A south/southeast "monsoon" flow will lead to a slight risk of mainly "Dry" thunderstorm activity over the southland through Tuesday night.

Primary threats from any thunderstorm activity that does develop will be... locally gusty winds and cloud-to-ground lightning strikes.

Very little or no rainfall expected.

There will be a continued risk of mainly afternoon and early evening thunderstorms over the mountains and deserts through the week.

A disturbance may enhance the instability and lead to greater chance of thunderstorms over the far eastern portions of the southern California desert areas on late Wednesday morning through early Wednesday evening.

Chance of thunderstorms next couple of days

***Updated at: 2:40pm/pdt, Monday, July 9th, 2007***

A weak monsoon flow will develop early this week over the southland and much of the southwest region.

This will result in showers and thunderstorms (mainly over the mountain/desert locations) through at least mid-week.

A weak disturbance will pass over the southland late Monday night and early Tuesday morning. This will spark a few thunderstorms over the southland (mainly later Monday night through Tuesday morning.

There will be a continued risk of showers or thunderstorms (mainly over the mountains and deserts) Monday afternoon through Wednesday.

Beginning of the monsoon season!?

(Cumulonimbus clouds at sunset)

Increasing monsoon moisture will bring isolated showers and thunderstorms during the afternoon and early evening hours over the mountains of Los Angeles...Ventura...San Bernardino...Riverside and San Diego counties for the next few days.

At this time... the best chance of showers and thunderstorms will be on Tuesday...as a weak disturbance tracks across the southland.

On Tuesday... there will be greater areal coverage the tstorm activity...with a chance of thunderstorms over the deserts and even a slight chance of a thunderstorm drifting westward off the mountains into the valleys of the IE.

For the coastal plain and valley areas... expect night and morning low clouds and fog for the next couple days along with cool temperatures along the coast... still above normal temperatures for the valleys...especially the valleys of the Inland Empire.

7/7/7 will prove to be lucky for some southlanders...

(Vincent Thomas Bridge - March 2003)

7/7/7 will prove to be lucky for some southland residents...as temperatures will be much cooler than the previous several days.

Here are a few selected forcast high temperatures for Saturday...
Beverly Hills/Mid-City Los Angeles: upper 70s
Long Beach/San Pedro: upper 70s
Lompoc: upper 60s
Burbank: upper 80s
Newport Beach: upper 60s
San Diego (downtown area): lower 70s
Chula Vista: lower to middle 70s

Several models are suggesting by mid to late in the coming week... a south/southeast flow over the southland.

This will result in an increase in dewpoints over the mountains and deserts and an increasing threat of afternoon/evening thunderstorms.

So... stay tuned!!!

Hot inland areas on Friday

(Along the 15 Freeway - Temecula)

Continued hot temperatures on Friday for inland sections of the southland.

Some selected forecast high temperatures for Friday...
Woodland Hills: near 101
Newhall: upper 90s
Ojai: around 95
San Bernardino: around 100
Riverside: upper 90s
Hemet: around 106
Temecula: lower to middle 90s
Big Bear: around 95
Idyllwild: middle to upper 90s
Mount Laguna: middle 90s
Palm Springs: around 116
Borrego Springs: around 115

There is also a slight chance of "dry" thunderstorms Friday afternoon over the mountains of San Bernardino and Riverside counties.

Heat continues for the inland areas on Thursday

(Catalina Island - August 1983)

Continued hot inland areas as high pressure continues to influence southland California's weather. Temperatures in the afternoon will reach into the 100's for the inland valley areas...with the hottest temperatures in the San Bernardino/Riverside areas. Temperatures in those locations will range from 104 to 107.

But... an "Eddy" circulation will bring cool and gloomy weather to the immediate coastal areas on Thursday with temperatures in the lower to middle 70s for the most during the afternoon hours.

Happy Birthday America!!!

***Updated at: 1:30pm/pdt, 4th of July, 2007***

Here are some forecasts for a few selected fireworks shows from around the southland...

Culver City - High School
Fireworks... 9:00pm:
Mostly clear skies
lower to middle 70s
South to southeast winds around 5 mph


Diamond Bar - High School
Fireworks... 9:00pm:
Clear skies
upper 70s to around 80
Light and variable winds under 5 mph

Fullerton - Fullerton High School
Fireworks... 9:00pm:
Clear skies
around 75
Light and variable winds under 5 mph


Irwindale - Speedway
Fireworks... 9:00pm:
Clear skies
upper 70s
Light and variable winds under 5 mph



Laguna Hills - Community Center
Fireworks... 9:00pm:
Patchy low clouds and fog
lower to middle 70s
Light and Variable winds under 5 mph



Lancaster - Antelope Valley Fairgrounds
Fireworks... 9:00pm:
Clear and locally breezy
middle to upper 80s
West to southwest around 15 mph with
a few higher gusts possible



Los Angeles - Memorial Colliseum
Fireworks... 9:00pm:
Mostly clear skies
lower to middle 70s
South to southeast winds around 5 mph



Placentia - Bradford Stadium
Fireworks... 9:00pm:
Clear skies.
around 75
Light and variable winds under 5 mph.


San Diego - San Diego Bay
Fireworks... 9:00pm:
Low clouds and patchy fog
around 70
Light winds


Thousand Oaks - The Oaks Mall
Fireworks... 9:00pm:
Clear skies
near 70
Light and variable winds under 5 mph.

Hot and dry conditions this week

(Lone Cirrus cloud)

Hot and dry conditions for the southland through the week.

The hottest temperatures will occur over the valleys...where temperatures will approach the 110 degree mark on the 4th of July and Thursday.

For mid-city Los Angeles... temperatures will be in the upper 80s to around 90 through Thursday... with the hottest day expected today (Tuesday).

If your planning on cooling off at the beach... beware... there is a high risk of rip currents along the Orange and San Diego county beaches through at least the 4th of July.

Hot holiday week for the southland

(Sunrise - Sunday, July 1st, 2007)

Hot temperatures...especially inland areas this week.

Temperatures are expected to approach the 110 degree mark in the valleys of the IE and in the 100s in the San Fernando and San Gabriel valleys by the Fourth of July.

For mid-city Los Angeles... it appears the hottest days will occur on the Fourth and on Thursday...when temperatures will be around 90 during the afternoon hours.

Even the immediate coastal areas will see temperatures around 80 degrees.

NOAA's National Weather Service has posted Excessive Heat Watches during the afternoon hours Tuesday through Friday for portions of the southland.

Remember... don't leave children or pets in cars! Also check on the elderly...especially if they don't have air conditioning.

Driest rain season on record for the southland

(Colorful pre-sunrise over the Mojave Desert)

2006-2007 rain season came to an end Saturday over the southland.

This was the driest rain season on record for many locations...including downtown Los Angeles (which only recieved 3.21" of rain)

Records for Downtown L.A. date back to 1877 (a total of 130 rain seasons).

No sign of any rain in the future for the southland (short-term or long term).

As for the pending heat wave for southern California.

A strong off shore flow produced by a large dome of high pressure over the interior west...will likely bring record-breaking heat to inland southern California by Tuesday and likely to continue for much of the remainder of the week.

It is possible... some inland valley locations may break the 110 degree mark on the 4th of July or on Thursday.

The beaches will be warm also... in the upper 70s to the lower 80s for the most part.

Mid-city Los Angeles will likely see mid week daytime temperatures in the upper 80s to the lower 90s.