Chance of rain over parts of the southland on Monday

(Somewhere off the coast of San Diego)

Moisture from Tropical Storm Juliette will bring mostly cloudy skies along with a chance of rain during Monday over Orange, San Diego, San Bernardino and Riverside counties with the possibility of scattered thunderstorms over the mountains.

Rainfall amounts in these areas will be light... ranging from a Trace to 0.05"...except where thunderstorms occur where amounts may exceed 0.10".

Elsewhere across the southland... skies will start out sunny then becoming partly cloudy as the day progresses.

With the onshore flow... temperatures will be in the upper 60s to the middle 70s at the beaches, upper 70s downtown LA, upper 70s to the middle 80s in the inland portions of the OC and in the 80s in the valleys.

Weak off shore flow on Sunday

High pressure will produce a weak off shore flow of warmer air across the southland to finish out the weekend.

With mostly sunny skies on Sunday... look for high temperatures in the upper 60s to the middle 70s at the beaches... upper 70s to the lower 80s inland coastal plain and in the 80s to the lower 90s out in the valleys.

Gloom and sunshine for the southland on Saturday

(Harvest Moon - September 27th, 2007)

Little chance of seeing the Harvest moon Saturday morning...if you in the coastal plain, valleys or even the mountains...as a deep marine layer is in place.

The gloom should give way to at least partial sunshine during Saturday afternoon.

Temperatures will be a couple degrees warmer from what they were on Friday...

...middle 60s to the lower 70s at the beaches.
...lower to middle 70s coastal plain (including Downtown LA)
...70s to the lower 80s out in the valleys.

Outlook for Sunday...
Mostly sunny and much warmer temperatures.
Except morning low clouds and fog...mainly along the immediate coastline.

Friday's weather...

Gloomy Friday for the southland as a low pressure trough with produce an onshore flow.

Mostly cloudy skies across the coastal plain...valleys and lower coastal slopes with areas of fog, drizzle or light rain.
Rainfall amounts will only amount to a Trace to 0.02".

Daytime high temperatures on Friday will middle 60s to the lower 70s at the beaches, around 70 downtown LA/Inland Orange county and in the middle 60s to the around 80 in the valleys.

Over the mountains/deserts... skies will range from mostly sunny to partly cloudy during Friday along with breezy to locally windy conditions.

A little cooler for some on Thursday

(Looking north along the Santa Monica Bay from Manhattan Beach Pier)

A little cooler along the coastal plain on Thursday. Elsewhere... warm temperatures will prevail.

Morning low clouds and dense fog along the coast...otherwise the southland will see another mostly sunny day.

High temperatures on Thursday...
Beaches... upper 60s to the middle 70s
Downtown LA/Inland OC: upper 70s to the lower 80s
Valleys: lower 80s to the lower 90s

***More photos like the one picture above...at our new photo page...
"The South Bay of Los Angeles County"***

Warm and sunny for mid-week

(Hermosa Beach Pier at night)

Warm and sunny conditions expected all across the southland for mid-week.

Daytime high temperatures for Wednesday...
Beaches:
70s

Mid City LA/Inland OC:
lower to middle 80s

Valleys:
80s to the lower 90s

If you plan on an afternoon at any of the southland beaches...
Use caution... due to rip current threat.

Sunny and warm on Tuesday

(Manhattan Beach)

Mostly sunny skies expected for Tuesday...as the southland will be under the influence of a weak offshore flow.

Some selected forecast high temperatures for Tuesday...
Downtown L.A:
middle 80s

Avalon:
near 75

Lompoc:
middle to upper 70s

Pasadena:
upper 80s to near 90

Mt. Wilson:
around 75

Newport Beach:
around 75

Ontario:
upper 80s to near 90

Hemet:
lower 90s

El Cajon:
middle 80s

Idyllwild:
lower 80s

Hesperia:
middle to upper 80s

Sunny and mild conditions for Monday

(Hermosa Beach)

Mostly sunny skies and comfortable temperatures to start the new work week.

Forecast high temperatures for Monday...
Beaches: lower to middle 70s
Mid City LA/Inland OC: upper 70s to the lower 80s
Valleys: upper 70s and 80s

...Light/variable winds around 10 mph.

Much Warmer temperatures on tap for Tuesday and Wednesday.

Nice weather for the second half of the weekend!

(Sunset at Hermosa Beach)

After the rain and cold temperatures of Saturday...Sunday should be rather sunny and mild!

Forecast temperatures for Sunday afternoon will range from the middle 60s to the lower 70s at the beaches... lower to middle 70s inland OC and mid city Los Angeles and in the middle 70s to around 80 out in the valleys.

Wet Saturday

(Cajon Pass - Thursday, September 20th, 2007)

Finally... the upper level "Cut-Off" low pressure that has been parked south of Pt. Conception is beginning to move east.

This system will continue to bring scattered showers and isolated convection across the southland Saturday morning...then will decreasing spotty showers during the afternoon hours.

Flash Flood Watches remain in effect for the 2006 and '07 burn areas of Los Angeles... Ventura and Santa Barbara counties for the morning hours. There is high potential of debris or mud flows in these areas.

Additionally... Flash Flood Watches remain in effect for the morning hours for the mountains of San Bernardino and the Santa Ana mountain areas.

Same thing applies with these areas... mud or debris flows are possible in the recent burn areas... Such as the Butler #2 fire area near Fawnskin/Big Bear Lake.

As for the convection (thunderstorms)... Isolated thunderstorms are possible...especially over the coastal waters and coastal plain.

Thunderstorms will have the potential of producing... locally gusty winds... brief heavy downpours... small hail and cloud-to-surface lightning strikes.

Additionally... brief waterspouts or funnels are possible over the coastal waters and immediate coastline.

Snow showers are possible at or above 7,000' today over the mountains of Ventura... Los Angeles and San Bernardino counties.

1 to 3" snowfall amounts are possible above 7,500' in the mountains of Ventura and Los Angeles counties. Little or no accumulation expected over the San Bernardino's.

Finally... due to rough seas... a high risk of rip currents along the immediate coastal waters of Orange and San Diego counties on Saturday.

Rain and mountain snow across the southland on Friday/Friday night

***Updated early Friday morning, September 21st, 2007***


An early season Pacific storm system will bring unsettled conditions to the region through Saturday.

Showers will gradually increase over southern California as Friday progresses.

The bulk of the rain will likely fall during Friday evening through early Saturday morning over the southland.

Some forecast rainfall amounts...
Coastal plain (LA. county northward): 0.25 to 0.75"
Coastal plain (OC southward): around 0.25"
Coastal valleys (north): 0.25 to 075"
Coastal valleys (San Diego county): 0.10 to 0.25"
Inland valleys: 0.50 to 075"
Inland valleys (San Diego county): 0.10 to 0.25"
Mountains: 0.75" to 1.25"
...Locally higher amounts on south/southwest facing mountain slopes and foothills.
Deserts: under 0.10"


Due the rains...and the potential for flooding and debris flows... NOAA's National Weather Service Forecast Office in Rancho Bernardo has issued a Flash Flood Watch from 2pm pdt Friday afternoon through Saturday morning over the mountains of San Bernardino, Riverside, San Diego and Orange counties.

NOAA's/NWS in Oxnard has also posted a Flash Flood Watch for the inland burn areas of Catalina Island through late Friday night.


Additionally... there will be slight chance of thunderstorms through the period...mainly coastal/valley locations.

Some thunderstorms will have the potential of producing... gusty winds, brief locally heavy rains, small hail and cloud to ground lightning. A brief waterspout or tornado is also possible along the coast.

Finally... snow showers are possible at the higher elevations of the mountain areas. It's not out of the question to see a light dusting of snow over the ridgetops and peaks.

Rare "wet & cold" storm to move into the southland late week

An unusually rare event... a winter like storm will affect the southland late this week with rain, wind and high elevation snows.

The southland on Thursday will begin to see the first effects of the storm system will be a deep marine layer (which will even sock in the mountains)...additionally gusty winds winds will blow over the mountains and deserts through Thursday.

Additionally with deep marine... will be a slight chance of light rain or drizzle (mainly Trace to 0.01" amounts) through Thursday afternoon.

The main event will come late Thursday through Friday night. As indicated in the above graphic... the upper level low pressure will dive south and should be located just southwest of Pt. Conception by midday Friday. This system will become detached from the main upper level flow over the west and will park just off the coast through Saturday.

Result... will be widespread shower activity across the southland and snow showers possible over the mountains (mainly above the 6,000' level).

Preliminary rainfall forecasts for the southland as follows:
Coastal plain/valleys: 0.25" to 0.75"
Coastal foothills and slopes: 1.00 to 1.25"
Mountains: 0.75 to 1.25"

Some favored west/southwest facing slopes in the San Bernardino mountains and the west/southwest facing slopes in Ventura and Santa Barbara counties may see locally higher amounts.

Along with the likelyhood of rain on Friday and Friday will also come the risk of thunderstorms over the coastal plain and valley areas.

It's not out of the question for waterspouts in the coastal waters or a weak EF 0 Tornado in the coastal plain on Friday.

Unusually cold storm system for the southland late this week

An unusually cold/wet storm system will track south from the northern Pacific and cut-off the from the main flow by late in the week.

This will first result in a deepening of the marine layer over the coastal/valley areas...extending inland to the lower mountain slopes by early Thursday morning.

Additionally... showers will increase in areal coverage over SoCal by late Thursday afternoon and become widespread by early Friday...then continue through early Saturday morning.

The latest computer models are indicating between 0.25" to 1.00" of rain over the coastal plain and valleys...with possibly locally higher amounts along the foothills and coastal slopes.

With the cold air... snow levels will likely lower between 5,500 to 6,000' over the mountains by early Friday morning.

At this time... it's too early to tell on snowfall accumulations. but it's not out of the question that some snow may accumulate at least on the highest ridges and peaks.

Onshore flow to continue...

(Santa Ynez Mountains)

Onshore flow will continue to produce night and morning low clouds and fog for the next few days...extending into the valleys during the late night and morning hours.

Temperatures will be below seasonal normals for most of the southland this week.

Looking ahead...
An upper level storm system (currently located in the north Pacific) will dip south along the coast and become cut off from the main jet stream...just of the southern California coast.

This will likely result in extensive cloud cover and a slight chance of light rain showers or drizzle come Thursday and Friday...possibly continuing through the weekend.

A mixture of gloom and sun to start the new work week

(Pt. Loma Lighthouse - San Diego)

Monday's outlook...
...Low clouds and fog during the morning hours...along the coastal plain and in most coastal valley locations...otherwise mostly sunny skies.

Forecast high temperatures on Monday:
Beach cities: upper 60s to the lower 70s
Mid city LA/Inland OC: upper 70s to the lower 80s
Valleys: upper 70s to the middle 80s

An afternoon seabreeze 10 to 15 mph...along the coastal plain.

Red Flag Warnings

(Smoke from the Butler #2 Fire near Big Bear - Saturday, Sept. 15th, 2007)

Extremely low humidities combined with breezy conditions will all add up to potentially dangerous fire conditions over the mountains of eastern Los Angeles county. Mountains of San Bernardino, Riverside and San Diego counties and the deserts in and around the Victorville...Hesperia...Lucerne/Apple valley areas through Sunday evening.

Humidities will drop to around 10% during the daytime hours on Sunday.

Conditions should improve by early week... due a fairly strong onshore flow that will prevail across the southland.

Weekend Outlook: Marine layer deepening by Saturday night

(Balboa Park - San Diego)

Cool along the beaches and warm temperatures for interior valleys this weekend.

Look for generally sunny skies the first half of the weekend (Saturday)...then the onshore flow increase Saturday night and Sunday with the marine layer making a return along the coastal plain.

Come Sunday night and Monday morning... the marine layer will spread into most coastal valleys (including the San Fernando, San Gabriel valleys and the valleys of the San Diego county.

High temperatures across the southland this weekend will range from the upper 60s to the middle 70s in most beach communties to the lower 80s in the interior coastal plain.

In the valleys... temperatures will range from the 80s in the coastal valleys to the middle 80s to the middle 90s in the valleys of the IE.

***Reminder... NOAA/NWS has in effect a Red Flag Warning above 4,000 feet in the mountains of Los Angeles county (SE of the 14 FWY) through 10:00am/pdt Saturday for very low humidities.***

Sunny skies for Friday

(Star of India Ship - San Diego Harbor)

Sunny skies and warm temperatures are expected across the southland on Friday.

Daytime high temperatures...
Beaches...
upper 60s and 70s

Inland portions of the coastal plain...
upper 70s to the upper 80s

Coastal valleys...
lower 80s to the middle 90s

Inland valleys...
90s

***Red Flag Warnings continue in effect through 10 am Saturday for the mountains above 4,000 feet in Los Angeles (areas southeast of the 14 FWY) for very low humidities***

...A big change to much cooler and more gloomy conditions expected during the weekend into much of next week!

Outlook for Thursday: No change for SoCal

(Coronado Island)

No change for Thursday...
...Sunny skies across SoCal for the rest of Thursday.

Daytime high temperatures will range from the upper 60s to the upper 70s the coast, upper 70s to the middle 80s inland portions of the coastal plain...except upper 80s to the middle 90s inland portions of the OC.

The valleys will remain on the warmside Thursday... mainly in the 80s with lower 90s valley locations...except 101 to 106 far interior valleys of the IE.

***Red Flag Warnings remain in effect for the mountains (above 4,000 feet) in LA and Ventura counties through 10am Friday for very low humidities.***

Warm inland areas for mid-week

(Evening low clouds - Downtown San Diego)

High pressure will gradual weaken over the southwest region during the remainder of week.

Inland areas of southern California will likely see at least another day (Wednesday) of warm temperatures before a trough of low pressure will bring a fairly strong onshore flow this weekend and early next week.

Valley temperatures on Wednesday will likely reach into the upper 80s to the upper 90s (except around 100 in some far interior valleys).

Meanwhile coastal communities will see high temperatures Wednesday mostly in the lower to middle 70s.

Mid city LA/Interior OC will see high temperatures in the middle 80s to near 90.

***Reminder***
Red Flag Warnings remain in effect for elevations at 4,000 feet and above for the mountains of Los Angeles and Ventura counties through early Thursday morning for very low humidities and warm temperatures.

Mini heatwave for inland areas Tuesday

(Balboa Park - San Diego)

High pressure aloft will bring warm temperatures along with mostly sunny skies across the southland on Tuesday.

Daytime temperatures will range from the 70s to the lower 80s at the beaches to the 90s to the lower 100s in the valleys.

Mid City Los Angeles/Inland OC will see temperatures nearing the 90 degree mark by mid-afternoon Tuesday.

***Due to the heat and very low humidities... NOAA's National Weather Service has posted a Red Flag Warning through early Thursday morning above 4,000 feet for the following locations of southern California... the mountains of Ventura and Los Angeles counties.***

***A Fire Weather Watch remains in effect for elevations above 4,000 feet in Santa Barbara county from mid-afternoon Tuesday through late Wednesday night.***

Seasonal weather to begin the work week

(163 FWY - Balboa Park in San Diego)

***Updated at: 3:43am/pdt - Monday, Sept. 10, 2007***

Mostly sunny skies with near normal temperatures expected across the southland on Monday.

There will be some low clouds and fog during the morning hours along the San Diego county coast.

Some selected forecast high temperatures on Monday...

Huntington Beach:
lower to middle 70s

Venice Beach:
lower to middle 70s

Oxnard:
around 75

Chula Vista:
middle 70s

El Cajon:
around 85

Pasadena:
near 90

Ojai:
lower to middle 90s

Wrightwood:
lower 80s

Hesperia:
near 100

Borrego Springs:
around 105

...A light afternoon seabreeze around 10 mph.

Rest of the weekend: Forecast

(Crescent Moon - Saturday, September 8th, 2007)

***Updated at: 03:41am pdt Sunday Sept. 09 2007***

Remainder of the weekend for the southland...
...Mostly sunny skies with seasonal temperatures.
There will be patchy night and morning low clouds and fog...mainly coastal areas of the OC and San Diego county.

Forecast high temperatures on Sunday...
Beaches: upper 60s to the middle 70s
Downtown LA/inland OC: upper 70s to the lower 80s
Valleys: middle 80s coastal valleys to the lower 90s far interior valleys
Mountains: middle 70s northern mountains to the upper 80s far southern mountains
High Deserts: 90s
Low Deserts: 102 to 108

...An afternoon and early evening seabreeze 10 to 20 mph.

Southland weekend weather...

***Updated at: 04:09am/pdt, Saturday, September 08, 2007***

The marine layer will continue to make it self known over the southland this weekend...especially Saturday night and Sunday morning

The onshore will make for seasonal (comfortable) temperatures...except in the some far interior valley and desert locations where temperatures will be on the warmside.

Moisture creeping into San Diego county will bring a small chance of afternoon and early thunderstorms over the mountains of the county.


A few selected forecast high temperatures over the weekend...
Downtown Los Angeles:
around 80

Long Beach:
around 80

Newport Beach:
lower 70s

Miramar:
middle to upper 70s

Lompoc:
lower to middle 70s

Ontario:
upper 80s to near 90

Temecula:
middle 80s

San Gabriel:
around 85

Burbank:
around 85

Lancaster/Palmdale:
middle to upper 90s

Thermal:
around 105

An afternoon/early evening seabreeze around 10 to 20 mph possible... mainly along the coastal plain.

Nice weather to wrap up the work week

(Gloomy evening - San Diego harbor)

Morning gloom along the coast and in most valley locations will give way to mostly sunn skies Friday afternoon.

Temperatures will be near the seasonal normals on Friday.

Daytime high temperatures will range from the upper 60s to around 7o at the beaches to the 80s to the lower 90s in the far interior valleys.

Meanwhile downtown LA and inland OC will see high temperatures in the upper 70s to around 80.

The nice weather will continue through the weekend into at least the early part of the coming week!

What a change!

What a change for the southland...

A fairly strong onshore flow is bringing much cooler temperatures to the region along with night and morning low clouds and fog...extending inland to the valleys.

Some beach areas will struggle over the next few days to get out of the 60s...due to the gloom lingering into to the afternoon hours.

Meanwhile...
most areas will see high temperatures in the 70s...except in the 80s to the middle 90s in the far inland valleys.

As it looks right now... this pattern should persist at least into the middle part of next week!!!

Cooler and the night/morning gloom returns to the coast!

Finally after a week of heat... cooler weather has moved over much of the southland.

The cooler air is due to the a broad trough of low pressure over the Pacific NW and at a smaller scale... coastal eddy just off shore of LA/Orange counties.

Over the next few days...into the weekend.

Look for temperatures around 80 degrees or so for downtown LA, upper 60s to the middle 70s at the beaches and in the 80s to the middle 90s out in the valleys.

Night/morning low clouds and fog along the coast...will likely spread into some valley locations (especially coastal valleys) during the late night through mid-morning hours.

Some models are suggesting a "mini" heat wave during the early to middle part of next week... but temperatures will be no where close to the levels they were during the past heat wave episode.

Not as hot for the coastal areas on Tuesday!

(Negative, Infrared imagery of a "Mature" Thunderstorm)

The weather pattern that has been bringing the unbearable heat to the region is finally weakeng.

The noticable change on Tuesday will be the cooler temperatures along the coastal plain with forecast high temperatures in the 70s for the most part.

Meanwhile downtown LA will see high temperatures reach 90 and the Hollywood Hills in the middle to upper 90s.

There has been a return to the Marine layer along the OC and San Diego coast early Tuesday morning

A more extensive marine layer is forecast Tuesday night and Wednesday morning reaching inland portions of the coastal plain (including Downtown LA) by late evening.

For the coastal valleys... you will have to wait until Wednesday night and Thursday morning to see the gloom.

As for the thunderstorms over the mountains and deserts... with less humidity and more stable air than during the previous days...there should be less thunderstorm activity Tuesday afternoon/evening... with only 20% areal coverage or so.

Labor Day: Another hot and sticky day

***Updated at: 11:31am/pdt, Labor Day, September 3rd, 2007***

...Another hot and sultry day in the southland.

High pressure over the Arizona will continue to produce an strong off shore flow across SoCal.

The dewpoints will remain high... in the 60s for the most part.

Dewpoints combined with the high temperatures will make for very uncomfortable conditions... especially areas away from the immediate coast.

Some forecast high temperatures on Labor Day...
Downtown LA: around 101 (Record for today: 103 - 1988)
Hollywood Hills: 100 to 108
Van Nuys: around 109
Newhall: near 109
Lancaster: around 104 (Record for today: 108 - 1955)
Anaheim: around 101
San Diego (Lindbergh Airport): around 90 (Record for today: 92 - 1998)
Ontario: around 109 (Record for today 112 - 1955)
Riverside: around 111 (Record for today: 112 - 1955)


***The good news is... the flow will turn more onshore by mid to late week bringing cooler temperatures and a return to the night and morning gloom along the coast!***


Along with the heat/humidity... will come another round of afternoon/evening showers and thunderstorms over the mountains...deserts and the valleys of the IE and San Diego county.

Like the past few days... there will be a continued threat for heavy rains, hail and strong...potentially damaging winds along with frequent cloud-to-ground lightning strikes.

The high potential for damaging winds/hail will occur over the Inland Empire's valleys and mountains.

NOAA's NWS has issued a FLASH FLOOD WATCH through early Monday evening for the valleys of the IE and San Diego county and the mountains/deserts of San Bernardino/Orange, Riverside,San Diego, Los Angeles counties...and the mountains of Ventura county.

Sunday: Heat & Thunder

(Late morning Cumulus clouds, Saturday, September 1st, 2007)

Another hot and stormy day on tap for Sunday.

Scattered thunderstorms are likely to develop over the mountains/deserts by late morning and become widespread during the afternoon and early evening hours.

The greatest areal coverage will be over the Inland Empire and San Diego county's mountain/deserts.

Like the past couple of days... there's a chance some of the thunderstorms make it westward in the valleys of the IE and San Diego county.

The primary threats from the storms will continue to be heavy rains/possible flash flooding... hail... strong/gusty winds and frequent cloud-to-ground lightning strikes.

As for the heat...
Most coastal/valley locations will see the temperatures rise a couple of degrees from what they were on Saturday.

It will remain muggy too. Dewpoints in the upper 50s to the middle 60s for the most part.

Resulting in heat indices ranging from 106 to 118 in some valley locations Sunday afternoon/early evening.

Like Saturday...
If you plan on cooling off at the beaches... there continues to be a high risk of rip currents along the coastal waters of Ventura... L.A.... Orange and San Diego counties.

Looking ahead...
Keeping our eyes on Tropical storm Henriette!
Depending on the exact track and weather patterns over the southwest U.S..

Henriette may spread moisture into southern California late in the week and over next weekend... resulting in an increase in showers/tstorms over the region.

Stay tuned!!!

Hot, sticky and continued risk of thunderstorms for the holiday weekend

High pressure near the 4 corners region will bring hot...humid weather to the southland through the holiday weekend.

Moisture in the southeast flow will continue the chances of thunderstorms. There may be an increase in areal coverage and intensity of the thunderstorm activity beginning later Saturday night and continuing through Sunday evening...as an easterly wave tracks westward across the region.

The primary threats from the thunderstorms this weekend,
...Strong & gusty winds, hail, locally heavy downpours and frequent cloud-to-ground lightning strikes.

As for the heat,
...Temperatures on Saturday will likely reach into the middle to upper 90s for downtown LA, upper 90s to the lower 100s inland portions of the OC and in the 100s in all valley locations.

The beaches will see high temperatures on Saturday in the upper 70s to the middle 80s for the most part.
As usual the humidity will make it feel even more uncomfortable.

Temperatures Sunday and Labor day will be a couple of degrees cooler from the forecast highs on Saturday.

By the way,
...If you plan on cooling off at any of the southern California beaches this weekend... beware... there's a high risk of rip currents along the beaches of Los Angeles, Ventura, Orange and San Diego counties.