While not unprecedented, it certainly is odd for the last week of June to see a weather bulletin with snow accumulation like this from NWS/NOAA. Here’s the storm system:

WWUS46 KSTO 272133

WSWSTO

URGENT – WINTER WEATHER MESSAGE

NATIONAL WEATHER SERVICE SACRAMENTO CA

233 PM PDT MON JUN 27 2011

..UNSEASONABLY COOL AND SHOWERY WEATHER SYSTEM TUESDAY AND

WEDNESDAY.

.A VERY DYNAMIC AND COOL LOW PRESSURE SYSTEM CONTINUES TO APPROACH NORTHERN CALIFORNIA FROM THE GULF OF ALASKA AND WILL MOVE OVER THE SIERRA NEVADA TUESDAY AFTERNOON INTO WEDNESDAY. THIS SYSTEM IS PROJECTED TO BRING WELL ABOVE NORMAL PRECIPITATION AMOUNTS FOR THIS TIME OF YEAR ALONG WITH CHANCES OF THUNDERSTORMS.

CAZ069-280945-

/O.NEW.KSTO.WW.Y.0074.110629T0900Z-110629T2100Z/

WEST SLOPE NORTHERN SIERRA NEVADA-

233 PM PDT MON JUN 27 2011

…WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM TO 2 PM PDT

WEDNESDAY ABOVE 7000 FEET…

THE NATIONAL WEATHER SERVICE IN SACRAMENTO HAS ISSUED A WINTER

WEATHER ADVISORY ABOVE 7000 FEET FOR SNOW AND BLOWING SNOW OVER

THE WEST SLOPE OF THE NORTHERN SIERRA NEVADA…WHICH IS IN EFFECT

FROM 2 AM TO 2 PM PDT WEDNESDAY.

* SNOW ACCUMULATIONS: UP TO 5 INCHES OF SNOWFALL OVER THE CREST TO

INCLUDE CARSON PASS ON HIGHWAY 88…EBBETTS PASS ON HIGHWAY 4

AND SONORA PASS ON HIGHWAY 108.

* ELEVATION: EXPECT SOME SNOWFALL ABOVE 7000 FEET WITH MOST

ACCUMULATION ABOVE 7500 FEET.

* TIMING: BEGINNING AFTER MIDNIGHT AND ACCUMULATING BY 3 AM PDT.

* LOCATIONS INCLUDE: CARSON PASS ON HIGHWAY 88…EBBETTS PASS ON

HIGHWAY 4 AND SONORA PASS ON HIGHWAY 108.

* WINDS: SOUTH TO SOUTHWEST WINDS 10 TO 20 MPH WITH GUSTS UP TO 45

MPH.

* IMPACTS: HIGHWAYS ARE OPEN THROUGH PASSES, SO ACCUMULATION MAY

CAUSE DELAYS.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW AND/OR

BLOWING SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR

SLIPPERY ROADS AND LIMITED VISIBILITIES…AND USE CAUTION WHILE

DRIVING.

&&

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