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finally! a little snow

By ccrossen | February 7, 2013

It’s been a long, long stretch since we’ve had snow … too long to remember almost. About a month since the last refresh, and 5-6 weeks since the last real pow. Thankfully it stayed very cold and then we went into corn. Time for another small system to come in. Not expecting much, but we’ll take it. Looking at 6-8 inches in the mountains tonight through Friday.


BAND OF PRECIP BEHIND THE COLD FRONT IS SPREADING ACROSS NWRN CA. THE LEADING EDGE SHOULD REACH WESTERN LASSEN COUNTY BY LATE MORNING, AND SPREAD SOUTHEAST THRU THIS AFTERNOON. MOST PRECIP WILL FALL AS SNOW IN THE COLD AIR MASS BEHIND THE FRONT, WITH 700 MB TEMPS RANGING FROM -10 TO -13 C. SNOW IS EXPECTED TO BEGIN IN THE TAHOE BASIN BY EARLY-MID AFTERNOON, THEN AFFECT THE PEAK COMMUTE TIME BETWEEN 3-7 PM AROUND RENO-CARSON CITY.


THE SNOW BAND WILL PRODUCE TYPICAL WINTER TRAVEL IMPACTS, BUT AMOUNTS ARE NOT EXPECTED TO BE VERY HEAVY AS MOST AREAS WILL ONLY RECEIVE ACCUMULATING SNOW FOR 1-3 HOURS. UP TO 2 INCHES ARE POSSIBLE IN WESTERN NV NORTH OF HIGHWAY 50 WITH MOST SNOW OCCURRING BEFORE MIDNIGHT. FROM THE TAHOE BASIN NORTHWARD TO WESTERN LASSEN COUNTY, 2-5 INCHES ARE LIKELY. IF THUNDERSTORMS FORM IN THE NORTHERN SACRAMENTO VALLEY NEAR REDDING THIS AFTERNOON OR EVENING, SMALL SCALE CONVECTIVE SNOW BANDS COULD SPREAD INTO PARTS OF LASSEN COUNTY TONIGHT. IF A BAND PERSISTS OVER THE SAME AREA FOR SEVERAL HOURS, LOCALLY HEAVY SNOWFALL WOULD RESULT BUT WHERE THESE BANDS SET UP REMAINS UNCERTAIN.


FOR FRIDAY, THE FOCUS FOR ACCUMULATING SNOW SHIFTS TO WEST CENTRAL NV AS WRAP AROUND SNOW AREA COULD IMPACT AREAS EAST OF HIGHWAY 95. THE GFS EXTENDS THE MOISTURE FARTHEST WEST TO NEAR LOVELOCK AND FALLON, WHILE THE ECMWF KEEPS THE BULK OF THE SNOW OVER LANDER- EUREKA COUNTIES, AND THE NAM FALLS IN BETWEEN THESE SCENARIOS. ALTHOUGH AN ADVISORY IS NOT PLANNED NOW DUE TO THIS UNCERTAINTY, POSSIBLE SNOW AMOUNTS UP TO 4 INCHES WILL BE MENTIONED FRIDAY IN THE W-CNTRL NV BASIN EAST OF HIGHWAY 95. ACROSS THE REST OF THE REGION, SNOW SHOWERS WILL DIMINISH IN THE MORNING EXCEPT NEAR THE SIERRA, WITH INCREASING SNOW SHOWERS IN THE AFTERNOON NEAR AND SOUTH OF I-80. ANOTHER BAND OF SNOW, PROBABLY AMOUNTING TO LESS THAN 1 INCH, MAY AFFECT THE FRIDAY AFTERNOON COMMUTE AROUND THE RENO-CARSON VICINITY. BRISK NORTH WINDS AND DAYTIME TEMPS ONLY IN THE 30S WILL PRODUCE A SHARP CONTRAST TO THE MILD WEATHER WHICH OCCURRED EARLIER IN THE WEEK, WITH CHOPPY CONDITIONS PROBABLE FOR PYRAMID LAKE.


THE SNOW WILL SLOWLY END FROM WEST TO EAST FRIDAY NIGHT OR EARLY SATURDAY BUT ADDITIONAL LIGHT ACCUMULATIONS COULD OCCUR EAST OF HIGHWAY 95 AND SOUTH OF HIGHWAY 50. OTHERWISE, BELOW NORMAL TEMPS WILL PREVAIL AGAIN SATURDAY WITH LOWER WIND SPEEDS COMPARED TO FRIDAY, BUT NOT COMPLETELY DROPPING OFF.

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