3 p.m. Tuesday Storm Update: Snow, then drier weather | SierraSun.com
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3 p.m. Tuesday Storm Update: Snow, then drier weather

NATIONAL WEATHER SERVICE RENO NV

300 PM PST TUE JAN 8 2008



WARM FRONTAL BAND/PRECIPITATION WORKED THROUGH THE AREA EARLIER TODAY AND WILL CONTINUE TO EXIT SOUTHWARD THROUGH THE HIGH SIERRA OF MONO COUNTY. MOUNTAIN TOP SENSORS WARMED A GOOD 5 DEGREES BEHIND THIS FEATURE AND AHEAD OF COLD FRONT THAT WAS WORKING THROUGH NORTHERN CALIFORNIA.

CONVECTIVE BAND OF PRECIPITATION ALONG FRONT WILL CONTINUE TO BRING PERIODS OF MODERATE TO HEAVY SNOW FROM THE NORTHERN SIERRA INTO WESTERN PLUMAS AND SIERRA COUNTIES UNTIL AROUND



09/01Z AND THEN DIMINISH AS UPPER LEVEL TROUGH AND JET DYNAMICS

TRANSLATE EAST OF AREA.

WARNINGS AND ADVISORIES WILL REMAIN IN EFFECT FOR NOW UNTIL CONDITIONS SHOW SIGNS OF IMPROVEMENT. MAIN ISSUE FOR LOWER ELEVATIONS WILL CONTINUE TO BE LOCALLY GUSTY WINDS AND BLOWING SNOW WHICH WILL RESULT IN HAZARDOUS DRIVING CONDITIONS AT TIMES. THIS WILL MAINLY BE AN ISSUE ALONG THE HIGHWAY 395 CORRIDOR.

OTHERWISE ACCUMULATIONS WILL AMOUNT TO SEVERAL MORE INCHES

IN THE MOUNTAINS TO POSSIBLY AN INCH OR TWO IN THE FOOTHILLS. SOME RAIN WILL FALL IN THE LOWER VALLEYS BEFORE BRIEFLY CHANGING BACK TO SNOW. NO ACCUMULATIONS ARE EXPECTED ON THE VALLEY FLOORS.

SKIES BRIEFLY CLEAR OVERNIGHT AHEAD OF NEXT SHORTWAVE THAT WILL PUSH INTO THE PACNW. WARM ADVECTION WILL RESULT IN AN INCREASE IN CLOUDS ALOFT WEDNESDAY FOLLOWED BY ANOTHER ROUND OF SHOWERS WITH THE PRIMARY FOCUS BEING NORTHEAST CALIFORNIA AND NORTHWEST NEVADA WHERE A FEW INCHES OF SNOW ARE POSSIBLE. THIS SYSTEM IS COMING IN A LITTLE FURTHER NORTH AND THEREFORE AMOUNTS FURTHER SOUTH INTO THE SIERRA WILL ME MUCH MORE LIMITED THAN CURRENT SYSTEM.

SNOW LEVELS WILL BE ON THE GRADUAL RISE AND WOULD EXPECT NO ACCUMULATION FOR VALLEY FLOORS WEDNESDAY NIGHT AND THURSDAY.

CONDITIONS DRY OUT FURTHER FRIDAY AS RIDGE BEGINS TO BUILD INTO THE REGION. CLOUDS SHOULD BEGIN TO DECREASE ALTHOUGH VALLEY INVERSIONS WILL BEGIN TO BUILD AS TEMPERATURES START TO WARM ALOFT. SEE EXTENDED FORECAST FOR DETAIL ON POTENTIAL FOG.

LITTLE TO NO CHANGE TO EXTENDED GRIDS.

AN UPPER RIDGE IS EXPECTED TO BE IN PLACE FOR THE ENTIRE EXTENDED PACKAGE FOR TRANQUIL/STAGNANT CONDITIONS. WHERE SNOW OR MOIST GROUND WITH RECENTLY MELTED SNOW EXISTS…THERE COULD BE AREAS OF FOG EACH NIGHT AND MORNING. WHERE EXACTLY IS A MYSTERY THIS FAR OUT…SO I LEFT THE CURRENT POSITION OF FOG IN THE GRIDS…NAMELY VALLEYS OF WESTERN NEVADA AND NORTHEAST CALIFORNIA. TEMPERATURES TO BE FROM A LITTLE BELOW NORMAL (SNOW COVER) TO AROUND OR SLIGHTLY ABOVE NORMAL (NO SNOW COVER).

At midday, traffic is moving in both directions on Interstate 80, despite steady snowfall that began this morning.

THE CHP ADVISES: CHAINS ARE REQUIRED ON ALL VEHICLES EXCEPT 4-WHEEL-DRIVE VEHICLES WITH SNOW TIRES ON ALL 4 WHEELS FROM COLFAX (PLACER CO) TO 7 MI EAST OF TRUCKEE (NEVADA CO)

EASTBOUND TRUCKS ARE BEING SCREENED AT APPLEGATE (PLACER CO) – DRIVERS MUST HAVE MAXIMUM CHAINS IN THEIR POSSESSION IN ORDER TO PROCEED – PERMIT LOADS ARE PROHIBITED

WESTBOUND TRUCKS ARE BEING SCREENED 5 MI WEST OF RENO (WASHOE CO) – DRIVERS MUST HAVE MAXIMUM CHAINS IN THEIR POSSESSION IN ORDER TO PROCEED – PERMIT LOADS ARE PROHIBITED

Accidents on a snowy Interstate 80 Tuesday morning were responsible for closing eastbound I-80 at Donner Summit, and one westbound lane near Hirschdale, authorities reported.

About 10 a.m., first responders reported a five-vehicle accident near Donner Summit had closed the interstate highway’s eastbound lanes.

At about the same time, Caltrans reported a vehicle struck the truck of a chain-installer near Stampede Meadows Road, forcing the closure of the interstate’s slow westbound lane.

NATIONAL WEATHER SERVICE RENO NV

907 AM PST TUE JAN 8 2008

.A COLD FRONT WILL MOVE THROUGH THE REGION THIS AFTERNOON AND

EVENING. SNOW WILL SPREAD ACROSS NORTHEASTERN CALIFORNIA SOUTH TO THE LAKE TAHOE AREA TODAY. THE HEAVIEST PERIOD OF SNOW AND STRONGEST WINDS WILL BE LATE THIS MORNING INTO THIS AFTERNOON ALONG AND AHEAD OF THE COLD FRONT. GUSTY WINDS WILL PRODUCE BLOWING SNOW IN WIND-PRONE AREAS INCLUDING VALLEY LOCATIONS ALONG HIGHWAY 395.

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 10 PM PST THIS

EVENING.

PERIODS OF HEAVY SNOW ARE POSSIBLE THROUGH THIS AFTERNOON NEAR AND AHEAD OF A COLD FRONT. WIND GUSTS TO 35 MPH WILL RESULT IN BLOWING SNOW WITH VISIBILITIES REDUCED TO NEAR ZERO AT TIMES.

SNOWFALL TOTALS THROUGH THIS EVENING OF 6 TO 10 INCHES ARE

EXPECTED BELOW 7000 FEET…WITH 10 TO 16 INCHES ABOVE 7000 FEET

BEFORE THE SNOW ENDS EARLY THIS EVENING.

CONDITIONS CAN DETERIORATE RAPIDLY DURING WINTER STORMS. SLOW

DOWN AND ALLOW EXTRA TIME WHEN TRAVELING. CARRY TIRE CHAINS..

FOOD…WATER…BLANKETS AND A FLASHLIGHT IN YOUR CAR IN CASE OF

AN EMERGENCY. CHECK OUR WEBSITE AT WEATHER.GOV/RENO OR LISTEN TO NOAA WEATHER RADIO FOR UPDATES ON THIS SITUATION.


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