Posted on 12/17/2010 7:42:32 PM PST by Ernest_at_the_Beach
STRONG PACIFIC STORM SYSTEMS WILL BRING HIGH RAIN AMOUNTS TO SOUTHERN CALIFORNIA THROUGH AT LEAST WEDNESDAY...
MOIST WEST TO SOUTHWEST FLOW ACROSS THE PACIFIC OCEAN WILL SEND A GREAT AMOUNT OF SUBTROPICAL MOISTURE INTO CENTRAL AND SOUTHERN CALIFORNIA FOR MOST OF THE COMING WEEK. A SERIES OF WAVES WILL IMPACT THE REGION AND PERIODS OF SIGNIFICANT RAINFALL ARE EXPECTED.
FOR THIS WEEKEND...THE FOCUS OF THIS MOISTURE WILL BE FROM CENTRAL CALIFORNIA TO THE LOS ANGELES AREA...SO AREAS FARTHER SOUTH TOWARD SAN DIEGO WILL BE ON THE EDGE OF THE HEAVIEST RAIN AND WILL NOT GET QUITE AS MUCH. IN ADDITION...LOW LEVEL WINDS FROM THE SOUTHWEST WILL PRODUCE MUCH HIGHER RAINFALL IN THE MOUNTAINS THAN IN THE LOWLANDS.
THE FIRST WAVE WILL IMPACT SOUTHERN CALIFORNIA TONIGHT AND SATURDAY AND BRING STEADY LIGHT TO MODERATE RAIN. A SECOND WAVE WILL ARRIVE SUNDAY AND BRING SOMEWHAT HEAVIER RAINFALL...THOUGH STILL A STEADY RAIN. THE RAIN WILL BECOME LIGHTER BY MONDAY.
TOTAL RAINFALL ESTIMATES FOR THIS AFTERNOON THROUGH SUNDAY NIGHT ARE AS FOLLOWS:
SAN DIEGO COUNTY COAST 1.00 TO 1.50 INCHES SAN DIEGO COUNTY VALLEYS 1.50 TO 2.00 INCHES ORANGE COUNTY COAST 1.50 TO 2.50 INCHES INLAND EMPIRE 1.25 TO 3.00 INCHES (HIGHEST NORTH) SAN DIEGO COUNTY MOUNTAINS 2.00 TO 5.00 INCHES RIVERSIDE COUNTY MOUNTAINS 2.50 TO 5.00 INCHES SANTA ANA MOUNTAINS 3.00 TO 6.00 INCHES SAN BERNARDINO COUNTY MTNS 4.00 TO 8.00 INCHES
NOTE THAT MOUNTAIN TOTALS WILL BE HIGHLY VARIABLE. FOR THE DESERTS...
SAN DIEGO COUNTY DESERTS AROUND ONE-HALF INCH COACHELLA VALLEY LESS THAN ONE INCH APPLE AND LUCERNE VALLEYS AROUND ONE INCH
HEAVY RAINFALL ACCUMULATIONS ARE EXPECTED...BUT THEY WILL BE DUE TO LONG DURATIONS AND NOT DUE TO HEAVY INTENSITIES. THEREFORE...THE FLASH FLOOD THREAT WILL BE FAIRLY LOW OVER THE WEEKEND. HOWEVER...SOME LOW LYING SPOTS...ESPECIALLY ALONG STREETS...COULD HAVE MINOR FLOODING...ESPECIALLY SUNDAY. STREAMS AND WASHES WHICH MIGHT NORMALLY BE DRY COULD HAVE WATER FLOWING THROUGH THEM THIS WEEKEND.
SNOW LEVELS WILL BE QUITE HIGH THROUGH MONDAY. SNOW ACCUMULATIONS WILL REMAIN ABOVE 8000 FEET...CONFINED TO THE HIGHEST PEAKS OF SAN BERNARDINO AND RIVERSIDE COUNTIES.
BREEZY SOUTH TO SOUTHWEST WINDS WILL INCREASE DURING THE WEEKEND WITH THE MOUNTAIN WIND SPEEDS AS HIGH AS 25 TO 35 MPH WITH SOME GUSTS TO 50 MPH. STRONGEST WINDS WILL BE ON THE RIDGES AND DESERT SLOPES.
FOR EARLY NEXT WEEK...THE STRONG JET STREAM WILL SHIFT SOUTH INTO SOUTHERN CALIFORNIA AS THE EAST PACIFIC TROUGH MOVES TO THE COAST. THIS WILL BRING SEVERAL PERIODS OF HEAVY RAIN ANYWHERE FROM TUESDAY AFTERNOON THROUGH WEDNESDAY NIGHT. THE HEAVY RAIN WILL FALL ON TOP OF SATURATED SOILS AND COULD PRODUCE FLASH FLOODING THEN. DUE TO THE SOUTHWESTERLY FLOW ALOFT...SNOW LEVELS WILL REMAIN HIGH.
RESIDENTS AND VISITORS OF SOUTHERN CALIFORNIA SHOULD STAY INFORMED DURING THIS UPCOMING WET WEATHER. CONTINUE TO MONITOR THE LATEST NATIONAL WEATHER SERVICE FORECASTS AND STATEMENTS.
I remember that. My son had a garden apt (street level) and the water came through the window - his place was flooded. It wasn’t Naperville but, IIRC, River Grove? Or something Grove.
We don’t like no stinking weather!
No, it is normal for a storm like this in December.
Thanks,...looks like the really heavy stuff is up toward San Francisco.
Do you think it will get there by Sunday. My daughter is traveling to LA on Sunday till Wednesday.
Petaluma has been a light rain. Been watching the NOAA forecasts. They were talking floods and power outages. pshaw! Barometer dropped from 29.8 to 29.6 since yesterday.
Better have Jim check the pontoons on levee around the FR server farm..
Flood Watch in the FResno area
http://www.wunderground.com/severe.asp
From what the forecasters are predicting, I’m gonna have to drain some water from the pool. :)
Surf’s Up, Dude!
one heckuva lot of glob west of the hawaiian islands ..
http://icons-pe.wunderground.com/data/456x343/2xpa_ir_anim.gif?201012172305
It will be here tomorrow - and by Sunday be pretty heavy, without much doubt.
No breaks at all!
No thanks to our vaunted leaders.
Thanks to God.
Jim! Be safe, keep your servers (and powder) dry.
For now it’s mostly central CA - but moving South as this thing gathers up all that moisture west of Hawaii. (That all came from the ‘ring of fire’ over by Japan and south of there... and we’ll see more of this as winter proceeds.)
“California has no freaking clue about weather....”
The geophysical properties don’t correlate. The West is largely sand..it tends to turn into flash floods and large landslides. A couple of inches of rain can cause huge problems in the West.
In the East you have topsoil, stone and deep rooted trees to hold the soil in place, so you can withstand a much larger deluge.
Not so much down here...it just runs off back into the Ocean...does clean the gunk off the roadways.
Need to get those Sat views. onto the thread.
We’ve had ten inches of snow so far, but it has come down an inch at a time, and on the odd sunny day vanishes for the most part. It’s back to bitter cold right now, but that’ll probably change. I heard that the forecast was for a lot of snow here, lake effect, because (what else?) it wasn’t expected to get cold enough for Lake Michigan to freeze over.
Here are some websites
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GOES 14 Satellite of North America,tracking the
Storm at 22,000 miles up.
Full Disc/East
http://goes.gsfc.nasa.gov/goescolor/goeseast/overview2/color_lrg/latestfull.jpg
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Appalachians and Great Lakes Snow Conditions & Weather Map
(Change it to where you are!)
http://www.snow-forecast.com/maps/dynamic/appal
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Current Winds/Speeds/Direction
(Again,change it to your local)
http://www.intellicast.com/National/Wind/Current.aspx?location=USMI0545
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North American Radar Stations
U.S. NEXRAD and TDWR Radar Stations
http://www.wunderground.com/radar/map.asp
canopfor on December 12, 2010 at 7:50 PM
I like this interactive map
http://www.intellicast.com/Local/WxMap.aspx?location=USCA0062&weather=hdRadarSmoothPaletteA
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