| SE End of Riviera - Santa Barbara, CA 93103
Weather
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| Weather Advisories |
| Warning Date: 2:41 PM PST on February 8, 2010
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| Warning Description: Special Weather Statement
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Advisory Text... |
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| Weather Discussion |
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| Weather Map |
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| Almanac |
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Sunrise
6:49am |
Moonrise
3:10am |
Moon Phase
30% |
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Sunset
5:33pm |
Moonset
12:55pm |
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| Star
Chart... |
| Rainfall
Totals |
| Rain Rate |
0.000 in/hr |
| Hourly Rain |
0.00 in |
| Daily Rain |
0.00 in |
| Monthly Rain |
1.75 in |
| Season Rain |
16.35 in |
| Normal Rain, month
to date |
1.93 in |
| Normal Rain, year
to date |
7.94 in |
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Local Weather Exchange®
Network
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Full Advisory Text
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Warning Description: Special Weather Statement
Warning Date: 2:41 PM PST on February 8, 2010
WarningSum:...A Very Cold And Vigorous Storm System Will Affect Southwestern
California Tuesday Through Early Wednesday...
Warning Message:A strong and very cold upper low off the Pacific northwest coast
this afternoon is forecast to drop southward along or just off the
California coast tonight and Tuesday...tracking right across
southwestern California Tuesday night. This system will threaten the
region with a variety of weather hazards...including possibly heavy
showers...thunderstorms...gusty winds and moderate to heavy snow
accumulations with very low snow levels.
Clouds will increase across the region tonight. Showers will
likely develop north of Point Conception early Tuesday morning..then
become likely in all areas Tuesday afternoon and evening. Showers
will begin to decrease from northwest to southeast across the region
late Tuesday night. Scattered showers will linger into
Wednesday...especially across north facing slopes of the Los Angeles
and Ventura County mountains and the Antelope Valley.
While moisture will initially be fairly limited with this system...
it may begin to tap into some deeper Pacific moisture as it moves
into southwestern California late Tuesday and Tuesday night. Very
cold air aloft associated with the approaching upper low will cause
increasing instability through the atmosphere Tuesday afternoon into
Tuesday night...leading to a chance of thunderstorms...some of which
could produce small hail...very heavy downpours and gusty winds.
It is not out of the question that some hail could approach severe
limits...and some waterspouts in the coastal waters could come
ashore as weak tornados.
Since the precipitation will be showery in nature...rainfall totals
Tuesday through early Wednesday will be highly variable...but will
average one half inch to one inch in coastal and valley areas...with
up to 1.50 inches in the foothills and mountains. Any areas that
receive thunderstorms may receive higher rainfall totals. It
appears that the highest rainfall totals will occur across Los
Angeles County...especially across eastern sections...including the
station and Morris burn areas. These areas will also have the best
chance of receiving thunderstorms with high intensity rainfall.
Residents in and below the recent burn areas should be prepared for
the potential for very heavy downpours. Flash flood watches may need
to be issued for the recent burn areas of Los Angeles County...
especially if the system takes a more over-water trajectory.
Due to the cold nature of this storm...snow will likely fall at very
low elevations across the region...impacting travel on many major
routes into and through the mountains. Snow levels are expected to
start out between 3500 and 4000 feet on Tuesday...then will lower
to between 2000 and 2500 feet Tuesday night. This would bring
accumulating snows into portions of the Antelope Valley and
Cuyama valleys...where up to 4 inches are possible...especially in
the foothills. An inch or two of snow may even fall over the
higher elevations of the Santa Monica Mountains and the interior
valleys of San Luis Obispo County. Snow may even occasionally fall
in the higher foothills above the Los Angeles and Ventura County
valleys...but no snow accumulations are expected there.
In the mountains of Los Angeles and Ventura counties...snow
accumulations of 6 to 12 inches are expected...with local totals as
high as 16 inches in the san Gabriels. In the mountains of San Luis
Obispo and Santa Barbara counties...3 to 6 inches of snow are
expected. Please refer to (laxwswlox) for more details.
Residents of southwest California are urged to stay tuned to the
latest National Weather Service statements and possible watches and
warnings as this weather situation continues to develop.
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Weather Discussion
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####018005344####
FXUS63 KFSD 082245
AFDFSD
AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
445 PM CST MON FEB 8 2010
.DISCUSSION...
OCNL LGT SNOW AND BLOWING SNOW SHUD CONT INTO TNGT OVER WRN PART OF
FCST AREA WITH THE FALLING SNOW DECREASING SLWLY FROM LATE EVE ON.
SOME BLOWING SNOW WILL CONT THRU THE NGT AND WILL ACCORDINGLY KEEP
ADVY THRU THE NGT. FRTHR E...AND ESPLY FAR ERN FCST AREA...LGT SNOW
AND BLOWING SNOW WILL INCREASE FROM THE N THIS EVE WITH SWD PASSAGE
OF SFC TROF WHICH IS AN UNCOMMON SORT OF WARMFNT. SNOW...WINDS...AND
TEMPS WILL ALL INCREASE WITH PASSAGE OF THIS TROF...SO ADVY LOOKS
GOOD FOR AT LEAST THE BLOWING SNOW...XCP WILL KEEP OUT OF FAR SRN
FCST AREA FROM SPRINGFIELD/YKN TO SUX. BEST UPPER SUPPORT FOR
SNOWFALL BRUSHES FAR ERN FCST AREA AND UP TO 3 INCHES OF NEW SNOW
SEEMS PSBL TNGT ALONG ERN BORDER OF FCST AREA...ESPLY ERN PART OF
SWRN MN. WITH A RATHER SUDDEN INCREASE OF WINDS EXPECTED BY LATE EVE
FROM CURRENTLY TRANQUIL CONDS...BLOWING SNOW WILL INCREASE
RPDLY...AND WINTER STORM OR BLIZZARD CONDS NOT COMPLETELY OUT OF THE
QSTN. WILL KEEP A STG ADVY FOR NOW WITH RIPEST POTENTIAL FOR DECENT
SNOW AND WHITEOUTS JUST E OF FCST AREA. BASICALLY CONDS WILL BE
DETERIORATING E AS THEY BEGIN TO IMPROVE OUT W. TEMPS WILL BE GOING
UP. FOR NOW EXPECT THAT THE WARMING WILL BE SMOOTHED OUT
SOMEWHAT...ENUF TO PREVENT TEMPS FROM RISING INTO THE 20S AS WE HAVE
NOW N OF FCST AREA. IN ANY EVENT TEMPS WILL BE TRICKY TNGT./WILLIAMS
THE FINAL WRAP AROUND SHOULD SLOWLY EXIT THE EASTERN HALF OF THE CWA
THROUGHOUT THE DAY...WITH POSSIBLE ANOTHER HALF AN INCH OR SO OF
SNOW IN PARTS OF SW MN AND NW IA. WILL STILL SEE SOME AREAS OF
BLOWING SNOW AS WELL...SO KEEPING THE ADVISORY IN PLACE FOR THESE
AREAS SEEMS REASONABLE. OTHERWISE...A MODIFIED COLD AIR MASS WILL BE
IN PLACE WITH HIGHS MAINLY IN THE TEENS ACROSS THE CWA. HIGH
PRESSURE WILL WORK INTO THE AREA DURING THE DAY...SO WINDS WILL
DECREASE FROM WEST TO EAST.
BY TUESDAY NIGHT...CLOUDS WILL DECREASE AND WINDS WILL LIGHTEN
SIGNIFICANTLY...ESPECIALLY WEST OF I29...AS HIGH PRESSURE MOVES
OVERHEAD. MODEL SOUNDINGS ARE HINTING THAT A LITTLE FOG COULD BE
POSSIBLE...BUT WITH THE LOWEST LAYER AT ABOUT -13 DEGREES C OR
COLDER...WOULD SUSPECT MAINLY ICE CRYSTALS SO FOG WOULD BE LESS OF A
THREAT. OTHERWISE...THIS SHOULD BE THE COLDEST NIGHT OF THE
WEEK...WITH LOWS RANGING FROM AROUND ZERO FROM SUX TO SLB TO AROUND
10 BELOW FROM HON TO BKX.
WEDNESDAY WILL SEE A SLOW PROGRESSION OF THE COLD SFC HIGH PRESSURE
TO THE EAST. THIS WILL KEEP WINDS LIGHT...WITH A SOUTHEAST WIND
CREEPING UP TO AROUND 10 MPH FROM THE JAMES VALLEY WEST BY
AFTERNOON. BECAUSE WE WILL BE SHAKING OFF THIS COLD AIR MASS...HIGHS
WILL REMAIN A BIT CHILLY...RANGING FROM THE MID TEENS TO LOWER 20S.
WEDNESDAY NIGHT INTO THURSDAY WILL SEE THE AIR MASS MODIFY WITH LOWS
AND HIGHS BOTH ABOUT 10 DEGREES WARMER THAN ON WEDNESDAY. ALBEIT
WITH LESS SUNSHINE AND MORE WIND. MORNING LOWS WILL RANGE FROM ABOUT
ZERO TO 5 BELOW IN SW MN AND NW IA TO 5 TO 10 ABOVE IN SC SD. HIGHS
ON THURSDAY WILL MAINLY BE IN THE 20S. A WEAK PIECE OF ENERGY WILL
MOVE THROUGH THE SOUTHERN CWA...SO HAVE PLACED A SMALL POP ALONG THE
MO RIVER FOR LIGHT SNOW.
IN THE LATTER PERIODS(FRI/MON)...THIS PERIOD LOOKS TO BE DOMINATED
BY A STRONG EAST COAST TROF...WHICH WILL LIKELY KEEP THE NORTHERN
PLAINS IN A MODIFIED NORTH TO NORTHWEST FLOW ALOFT. OF COURSE...WITH
A RELATIVELY FAST NORTHWEST FLOW AT TIMES...WEAK WAVES FORECAST BY
THE MODELS HAVE BEEN VARYING FROM DAY TO DAY ON TIMING AND
PLACEMENT...SO NO MAJOR PRECIPITATION THREATS EXPECTED AT THIS TIME.
WILL CONTINUE A SMALL CHANCE FOR LIGHT SNOW OVER THE EASTERN CWA ON
FRIDAY WITH A LITTLE BETTER AGREEMENT AMONGST THE MODELS.
OTHERWISE...THE NEXT POTENTIAL MAY COME SUNDAY...BUT AGREEMENT AND
THE FACT THAT IT COULD REMAIN EAST OF US WILL KEEP ANY MENTION OF IT
OUT OF THE FORECAST. OTHERWISE...TEMPERATURES WILL MODIFY BACK
TOWARDS SEASONAL NORMALS...BUT LIKELY REMAIN JUST BELOW...MAINLY
WITH RESPECT TO DAYTIME HIGHS. /08
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