Flash Flood Warning 2, NWS Sacramento, CA

000 
WGUS76 KSTO 040912
FFSSTO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SACRAMENTO CA
212 AM PDT SAT OCT 4 2008

CAC007-063-040916-
/O.EXP.KSTO.FF.W.0002.000000T0000Z-081004T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PLUMAS CA-BUTTE CA-
212 AM PDT SAT OCT 4 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 215 AM PDT FOR CENTRAL
BUTTE AND SOUTHWESTERN PLUMAS COUNTIES...

NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWS RAIN DIMINISHING OVER 
THE BURN SCAR AREAS OF PLUMAS AND BUTTE COUNTY. THEREFORE...THE 
FLASH FLOOD WARNING FOR DEBRIS FLOWS WILL BE ALLOWED TO EXPIRE AT 
215 AM.

LOCAL LAW ENFORCEMENT HAS REPORTED NUMEROUS MUD AND ROCK SLIDES 
AFFECTING PORTIONS OF HIGHWAY 70 AND STATE ROUTES 32 AND 36. 
MOTORISTS ARE URGED TO CONTINUE TO USE EXTRA CAUTION.

LAT...LON 3993 12096 3956 12114 3962 12155 3993 12162
      4011 12113

$$
JJ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
950 PM PDT FRI OCT 3 2008

.DISCUSSION...
METSAT IMAGERY SHOWS THE AFT END OF THE ENHANCED CLOUDS JUST
CLEARING THE COASTAL MTNS.  RADAR HAS SHOWED WIDESPREAD LIGHT TO
MODERATE PRECIP OVER MUCH THE CWA ESPECIALLY THE SIERRA.  RADAR HAS
KEPT HOURLY PRECIP TOTALS OF 0.1 TO 0.25 OVER THE WEST SLOPES OF THE
SIERRA TONIGHT BEFORE BECOMING HEAVIER WITHIN THE LAST HOUR AND A
HALF.  ERN BUTTE AND WRN PLUMAS COUNTIES HAVE SHOWN THE MOST RAIN ON
RADAR WITH STORM TOTALS NEAR 1.25 INCHES.  THIS IS OVER THE RECENT
BURNS SCARS FROM THE BTU COMPLEX...THE CANYON COMPLEX...THE RICH
FIRE AND THE CRAIG FIRE.  WITHIN THE LAST TWO HOURS...WE RECEIVED
SEVERAL REPORTS OF SMALL DEBRIS FLOWS ALONG HIGHWAY 70.
THEREFORE...WE ISSUED A FLASH FLOOD WARNING FOR DEBRIS FLOWS DUE TO
THE BURNED AREAS.

BEHIND THIS MAIN AREA OF ENHANCED CLOUDINESS IS MORE SHOWERY
PRECIP.  WATER VAPOR IMAGERY IS SHOWING A SMALLER VORT MAX NEARING
THE NW CAL COAST AND IT APPEARS TO BE BIFURCATING AS THE MODELS HAVE
BEEN INDICATING.  SO THIS SHOULD KEEP PRECIP GOING OVER THE WEST
SLOPE WITH THE OROGRAPHIC FLOW BUT MOST OF ENERGY WILL STEER TO THE
NORTH WHILE THE SRN END SHOULD VEER TO THE SOUTH.

SNOW LEVELS WILL BEGIN TO DROP TONIGHT AS THE TROUGH HAS NOW PUSHED
EAST OF OUR CWA.  SNOW LEVELS NOW ABOVE 8000 FT WILL DROP TO
6000-6500 FT BY MIDDAY SAT BRINGING SOME SNOW TO THE SIERRA PASSES
AND PEAKS.  JMC

.AVIATION...
PRECIP IS BECOMING MORE SHOWERY AS THE MAIN TROUGH MOVES OVER THE
SIERRA. OCCASIONAL MVFR CONDITIONS HAVE BEEN REPORTED IN THE
NORTHERN SACRAMENTO VALLEY IN RAIN SHOWERS AND LOW IFR IN THE HIGHER
TERRAIN...ESPECIALLY THE WEST SLOPES OF THE SIERRA. SOUTHERLY WINDS
HAVE STRENGTHEN THIS EVENING 20-25KT WITH G35-40KT OVER NRN SAC
VALLEY. EXPECT WINDS TO DECREASE AFT 10Z.  EXPECT MTN RIDGE WINDS
GUSTS 35-45KT TONIGHT.  SNOW LEVELS DROPPING TO 6000-6500 FT BY SAT
AFTN. JMC

&&

.STO WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY FROM 5 AM TO 5 PM PDT SATURDAY FOR WEST
SLOPE NORTHERN SIERRA NEVADA-WESTERN PLUMAS COUNTY/LASSEN PARK.

WIND ADVISORY FROM 8 PM THIS EVENING TO 4 AM PDT SATURDAY FOR
CENTRAL SACRAMENTO VALLEY-NORTHERN SACRAMENTO VALLEY.

&&

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SACRAMENTO CA
700 AM PDT FRI OCT 3 2008

CAZ013>019-063-064-066>069-041400-
SHASTA LAKE AREA/NORTHERN SHASTA COUNTY-
BURNEY BASIN/EASTERN SHASTA COUNTY-NORTHERN SACRAMENTO VALLEY-
CENTRAL SACRAMENTO VALLEY-SOUTHERN SACRAMENTO VALLEY-
CARQUINEZ STRAIT AND DELTA-NORTHERN SAN JOAQUIN VALLEY-
MOUNTAINS SOUTHWESTERN SHASTA TO NORTHERN LAKE COUNTIES-
CLEAR LAKE/SOUTHERN LAKE COUNTY-MOTHERLODE-
EAST FOOTHILLS/NORTH SACRAMENTO VALLEY-
WESTERN PLUMAS COUNTY/LASSEN PARK-WEST SLOPE NORTHERN SIERRA NEVADA-
700 AM PDT FRI OCT 3 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR INTERIOR NORTHERN CALIFORNIA.

.DAY ONE...TODAY

AN UNSEASONABLY STRONG LOW PRESSURE SYSTEM WILL SPREAD LIGHT RAIN
SHOWERS ACROSS THE NORTHERN SACRAMENTO VALLEY...NORTHERN MOUNTAINS
AND EASTERN FOOTHILLS TODAY. SHOWERS WILL MOVE INTO SACRAMENTO THIS
AFTERNOON...AND SPREAD INTO THE MOTHERLODE AND WEST SLOPE OF THE
NORTHERN SIERRA BY LATE AFTERNOON.

A COLD FRONT WILL MOVE INTO THE REGION THIS EVENING AND
TONIGHT...BRINGING WITH IT GUSTY WINDS AND PERIODS OF RAIN. THREE
QUARTERS OF AN INCH TO AN INCH OF RAIN WILL FALL IN THE FOOTHILLS
NORTH OF REDDING OVERNIGHT. AMOUNTS WILL DECREASE TO AROUND A THIRD
OF AN INCH AT SACRAMENTO AND STOCKTON. SOUTHEAST WIND GUSTS UP TO 30
MPH ARE POSSIBLE WITH THE PASSAGE OF THE COLD FRONT...WHICH WILL
MOVE THROUGH SACRAMENTO AROUND MIDNIGHT.

REGARDING THE BURN SCARS OF SHASTA AND TEHAMA COUNTIES...TWO PERIODS
OF SHOWERS ARE EXPECTED. THE FIRST WILL BE MAINLY LIGHT...STEADY
SHOWERS THIS MORNING INTO THIS AFTERNOON. THE SECOND WILL BE WITH
THE COLD FRONT THIS EVENING AND TONIGHT. WHILE AN INCH TO AN INCH
AND A HALF OF RAIN MAY FALL OVER THE BURN AREAS BY SATURDAY
AFTERNOON...THE RAINFALL WILL BE SPREAD OUT OVER A PERIOD OF MANY
HOURS. AT THE PRESENT TIME WE DO NOT ANTICIPATE RAINFALL RATES WILL
EXCEED ONE THIRD OF AN INCH PER HOUR...THE RATE NECESSARY TO CAUSE
BURN SCAR RUNOFF PROBLEMS. ISOLATED FIRE SCAR RUN OFF ISSUES ARE
POSSIBLE...SO PEOPLE LIVING IN AND NEAR A BURN AREA SHOULD BE AWARE
OF THIS POTENTIAL INTO TOMORROW AFTERNOON.

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KSTO - SPSSTO FOR DETAILS *

.DAYS TWO THROUGH SEVEN... SATURDAY THROUGH THURSDAY

IN THE MOUNTAINS...THE COLD FRONT MOVES THROUGH SATURDAY
MORNING...LOWERING SNOW LEVELS TO 7000 TO 7500 FEET BETWEEN 7 AND 10
AM. WHILE ONLY 1 TO 3 INCHES OF SNOW MAY FALL OVER DONNER SUMMIT OR
ECHO SUMMIT BY SATURDAY AFTERNOON...A PERIOD OF HAZARDOUS DRIVING
CONDITIONS IS LIKELY TO DEVELOP SATURDAY MORNING IN STRONG WINDS AND
SNOW SHOWERS. WIND CHILL TEMPERATURES COULD DROP INTO THE 20S AND
30S SATURDAY MORNING. LIGHT SNOW SHOWERS MAY FALL DOWN TO 6500 FEET
SATURDAY AFTERNOON...BUT NO ADDITIONAL ACCUMULATION IS EXPECTED.

BE PREPARED FOR WINTER DRIVING CONDITIONS IF YOU ARE HEADING INTO
THE MOUNTAINS TONIGHT THROUGH SATURDAY. ALSO...BE SURE TO BRING WARM
CLOTHES IF IT BECOMES NECESSARY TO LEAVE YOUR CAR FOR ANY REASON.
RAIN (AND/OR SNOW) WILL TAPER TO SCATTERED SHOWERS SATURDAY
EVENING...AND SKIES WILL CLEAR SATURDAY NIGHT.

* SPECIAL WEATHER STATEMENT..SEE WWUS86 KSTO - SPSSTO FOR DETAILS *

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS TO THEIR LOCAL NATIONAL WEATHER SERVICE OFFICE.

THE LATEST WEATHER INFORMATION IS AVAILABLE ON THE INTERNET AT
(LOWER CASE): HTTP://WWW.WRH.NOAA.GOV/STO

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SACRAMENTO CA
941 PM PDT FRI OCT 03 2008

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0840 PM     FLASH FLOOD      ENE PARADISE            39.76N 121.60W
10/03/2008                   BUTTE              CA   FIRE DEPT/RESCUE

            CAL FIRE REPORTING THREE SMALL ROCK/DEBRIS SLIDES ALONG
            HIGHWAY 70 BETWEEN THEIR FIRE STATION AND PULGA BRIDGE.
            CAL TRANS TO CLEAN UP.

&&

CPALMER