happ Posted January 16, 2010 Report Share Posted January 16, 2010 Normally I don't post weather concerns on the main forum but believe all California gardeners should take measures to protect palms from wind damage. An incredible amount of rainfall will occur this week like we haven't experience since 2005. Our normal "yearly" rainfall totals may be reached in this coming week. ...SPECIAL WEATHER STATEMENT... ...EXTENDED PERIOD OF SIGNIFICANT RAIN AND MOUNTAIN SNOW NEXT WEEK FOR SOUTHERN CALIFORNIA... A STORMY PATTERN IS SETTING UP ACROSS THE EASTERN PACIFIC OCEAN THAT WILL BRING PERIODS OF MODERATE TO HEAVY RAIN AND MOUNTAIN SNOW TO SOUTHERN CALIFORNIA MOST OF NEXT WEEK AND POSSIBLY INTO THE FOLLOWING WEEK. A STRONG PACIFIC JET STREAM HAS DEVELOPED OVER THE PACIFIC OCEAN THAT WILL DRIVE A SERIES OF MOISTURE LADEN STORMS ACROSS SOUTHERN CALIFORNIA. ONCE THE HEAVIER PRECIPITATION BEGINS MONDAY...IT WILL LIKELY CONTINUE ON THE COASTAL SLOPES UNABATED FOR MUCH OF THE WEEK DUE TO UPSLOPE FLOW. BASED ON HISTORIC PATTERNS...THIS WEEK-LONG EVENT HAS THE POTENTIAL TO GENERATE RAINFALL OF 5 TO 8 INCHES NEAR THE COAST...TO 15 TO 25 INCHES ON THE COASTAL MOUNTAIN SLOPES. THE STRENGTH OF THE JET STREAM DRIVING THESE STORMS IS OVER 200 MPH AND THE STORMS THEMSELVES WILL BE MOVING RAPIDLY ONSHORE IN QUICK SUCCESSION. AS A RESULT THERE ARE LIKELY TO BE STRONG WINDS THROUGH MUCH OF NEXT WEEK. OVER THE COASTAL WATERS GALE FORCE OR HIGHER WINDS ARE EXPECTED. OVER LAND...DAMAGING WINDS ARE LIKELY TO PRECEDE THE ARRIVAL OF EACH STORM. WIND GUSTS BETWEEN 40 AND 60 MPH ARE POSSIBLE FOR THE COASTS AND VALLEYS...WHILE THE MOUNTAINS AND DESERTS MAY HAVE GUSTS 60 MPH OR HIGHER. SHOULD EXCESSIVE RAINFALL DEVELOP AS FORECAST...UNREGULATED REACHES OF MAINSTREAM RIVERS ARE LIKELY TO HAVE SIGNIFICANT FLOW BY THE END OF THE WEEK. HEAVY FLOWS COULD RESULT IN FLOODING OF LOW-LYING AREAS ADJACENT TO THE RIVERS ONCE UNDERGROUND AQUIFERS FILL. IT HAS BEEN SEVERAL YEARS SINCE HEAVY FLOWS HAVE DEVELOPED IN THESE RIVERS...SO LOCAL INTERESTS SHOULD PREPARE FOR POSSIBLE FLOODING...INCLUDING IMPASSIBLE LOW-WATER CROSSINGS. AS THE WEEK PROGRESSES...MOST STREAMS AND NORMALLY DRY WASHES WILL BE FLOWING. AS THE SOIL BECOMES SATURATED...RECENTLY BURNED AREAS WILL BECOME SUSCEPTIBLE TO DANGEROUS...LIFE-THREATENING DEBRIS FLOWS. PERSONS LIVING IN AND CLOSE TO RECENTLY BURNED AREAS OR IN LOW-LYING AREAS SUBJECT TO RIVER AND STREAM FLOODING SHOULD STAY TUNED FOR LATER FORECASTS AND WARNINGS. LISTEN TO LOCAL NEWS MEDIA AND NOAA WEATHER RADIO FOR UPDATES. Los Angeles/Pasadena 34° 10' N 118° 18' W Elevation: 910'/278m January Average Hi/Lo: 69F/50F July Average Hi/Lo: 88F/66F Average Rainfall: 19"/48cm USDA 11/Sunset 23 http://cdec.water.ca.gov/cgi-progs/queryF?MTW Link to comment Share on other sites More sharing options...
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