Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 011108
AFDREV

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
308 AM PST SUN MAR 1 2015

.SYNOPSIS...
SNOW SHOWERS WILL CONTINUE TODAY MAINLY SOUTH OF HIGHWAY 50 AS LOW
PRESSURE TRACKS SOUTH THROUGH CALIFORNIA. A WEAKER SYSTEM IS
EXPECTED TO BRING A FEW MORE LIGHT SNOW SHOWERS MONDAY WITH
CONTINUED BELOW NORMAL TEMPERATURES. DRY CONDITIONS AND A WARMING
TREND ARE EXPECTED LATER NEXT WEEK.

&&

.SHORT TERM...
LIGHT SHOWER ACTIVITY CONTINUES FOR PORTIONS OF THE SIERRA AND
WESTERN NEVADA AS AN UPPER LOW PUSHES SOUTH OF THE REGION. THE
FAVORED REGION OF DEFORMATION FORCING HAS DEPARTED LEAVING WEAKLY
FORCED AREAS OF OROGRAPHIC LIFT NEAR PYRAMID LAKE AND THE EAST
SLOPES OF THE SIERRA. ACCUMULATING SNOWFALL IS EVIDENT NEAR LEE
VINING VIA WEB CAM THIS MORNING BUT RADAR ECHOES ARE LARGELY ABSENT
DUE TO THE SHALLOW NATURE OF THE SHOWERS WHICH THE RADAR BEAM
OVERSHOOTS AT THIS DISTANCE. THESE LIGHT SHOWERS WILL CONTINUE
THROUGH MORNING WITH LIGHT ACCUMULATIONS POSSIBLE MAINLY FROM ALPINE
INTO MONO COUNTY. COVERAGE WILL LIKELY EXPAND ACROSS MINERAL COUNTY
THROUGH THE AFTERNOON AS DAYTIME HEATING HELPS INCREASE SURFACE
INSTABILITY.

CHANCES FOR SNOW SHOWERS WILL PERSIST ACROSS THE SIERRA THROUGH
MONDAY EVENING AS A SECONDARY SHORTWAVE QUICKLY DIVES SOUTH OUT OF
THE PACIFIC NORTHWEST. THIS FEATURE HAS BEEN TRACKING WESTWARD OFF
THE CENTRAL CALIFORNIA COAST, TAKING FAVORABLE FORCING TO THE WEST
AS A RESULT. MAINLY WILL SEE A REINFORCING SHOT OF COLDER AIR ALOFT
WHICH WILL MAINTAIN INSTABILITY ACROSS THE SIERRA ALLOWING SNOW
SHOWERS TO DEVELOP THROUGH MONDAY AFTERNOON. NOT EXPECTING ANY
SIGNIFICANT WIDESPREAD SNOWS WITH THIS SYSTEM BUT DUE TO THE
CONVECTIVE NATURE OF THE THIS SYSTEM, ISOLATED AREAS OF HEAVIER
SNOWFALL ARE AGAIN POSSIBLE. SHOWERS WILL DIMINISH MONDAY NIGHT WITH
A DRIER NORTHWEST FLOW SETTING UP FOR TUESDAY. TEMPERATURES WILL
BEGIN A GRADUAL WARMING TREND INTO MIDWEEK. HIGHS WILL RETURN TO NEAR
SEASONABLE VALUES WITH HIGHS TUESDAY APPROACHING THE 50 DEGREE MARK
ACROSS WESTERN NEVADA AND LOWER 40S ACROSS SIERRA VALLEYS. FUENTES


.LONG TERM...WEDNESDAY THROUGH SATURDAY...
A RIDGE REBUILDS INTO THE WESTERN CONUS FOR THE SECOND HALF OF THE
WEEK, RESULTING IN DRY CONDITIONS AND A WARMING TREND WITH LIGHT
WINDS. DAYTIME TEMPS LOOK TO TOP OUT IN THE UPPER 40S TO MID 50S
WEDNESDAY (NEAR/SLIGHTLY BELOW AVERAGE) WITH RESIDUAL EASTERLY FLOW
TO HOLD DOWN MIXING SLIGHTLY. AS THE RIDGE BUILDS DIRECTLY OVERHEAD
FOR LATE WEEK, HIGHS JUMP TO AROUND 5-10 DEGREES ABOVE AVERAGE.
SNYDER

&&

.AVIATION...
AN ELONGATED UPPER LOW EXTENDS FROM OFF THE SOUTHERN CALIFORNIA
COAST INTO EASTERN CALIFORNIA (~KBIH) AND CENTRAL NEVADA (~KTPH).
EASTERLY WRAP-AROUND FLOW IS BRINGING ISOLATED TO SCATTERED -SHSN TO
EASTERN CALIFORNIA (TAHOE SOUTH TO LEE VINING) AND FAR WESTERN
NEVADA. ANY BRIEF -SHSN CAPABLE OF BRINGING VIS DOWN TO 1-2SM.
OTHERWISE THIS MORNING, WIDESPREAD DECKS BETWEEN 080-100 MSL
(LOCALLY 070-080 MSL) IN EASTERN CALIFORNIA AND WESTERN NEVADA TO
BRING TERRAIN OBSCURATION AND AREAS OF MVFR CIGS.

THIS AFTERNOON, SNOW SHOWERS TO SHIFT MAINLY INTO MONO AND MINERAL
COUNTIES FOR CONTINUED TERRAIN OBSCURATION AND SCT -SHSN THERE, WITH
SCT-BKN VFR DECKS FARTHER NORTH TO THE RENO-TAHOE AREA. SHOWERS
TAPER OFF TONIGHT, WITH ANOTHER ROUND OF ISOLD-SCT -SHSN AND -SHRASN
BLO 5,000 FT MSL ON MONDAY AS A WEAK UPPER DISTURBANCE DROPS THROUGH
CALIFORNIA. SNYDER

&&


.REV WATCHES/WARNINGS/ADVISORIES...
NV...NONE.
CA...NONE.
&&

$$

FOR MORE INFORMATION FROM THE NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/RENO (ALL LOWER CASE)





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