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000
FXUS65 KREV 202155
AFDREV

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
255 PM PDT MON MAY 20 2013

.SYNOPSIS...

A LOW PRESSURE SYSTEM APPROACHING THE WEST COAST WILL BRING
STRONG WINDS TO THE AREA TUESDAY, WITH GUSTY CONDITIONS LINGERING
INTO WEDNESDAY. TEMPERATURES WILL BE COOLER FOR THE SECOND HALF
OF THE WEEK AS LOW PRESSURE REMAINS OVER THE REGION WITH CHANCES
FOR SHOWERS NORTH OF INTERSTATE 80.

&&

.SHORT TERM...
GUSTY WINDS ARE EXPECTED TUESDAY AFTERNOON AS A COLD UPPER LEVEL
LOW DROPS ACROSS THE OREGON COAST. GUSTY WINDS WILL FIRST DEVELOP
ACROSS THE SIERRA TUESDAY MORNING AS JET WINDS DIP SOUTH AND
INCREASE THE 700MB FLOW NEAR 40KT. THIS WILL PRODUCE RIDGE GUSTS NEAR
75 MPH THROUGH WEDNESDAY MORNING. STRONG SOUTHWEST WINDS WILL THEN
SPREAD TO THE FOOTHILL AND VALLEY AREAS TUESDAY AFTERNOON AS A
STRONG SURFACE PRESSURE GRADIENT DEVELOPS OUT AHEAD OF A STRONG
COLD FRONT THAT WILL MOVE THROUGH EARLY WEDNESDAY MORNING. EXPECTING
SUSTAINED WINDS BETWEEN 20-30MPH WITH GUSTS UP TO 45 MPH ACROSS
MUCH OF THE AREA WITH GUSTS TO 35 TO 40 ACROSS MONO AND MINERAL
COUNTIES. AREAS OF BLOWING DUST ARE ALSO EXPECTED EAST OF
INTERSTATE 580/HIGHWAY 395 AND DOWNWIND OF DRY LAKE BEDS.
DANGEROUS BOATING CONDITIONS ARE ALSO EXPECTED ACROSS AREA LAKES
AND LAKE WIND ADVISORIES ARE IN PLACE FOR TUESDAY.

GUSTY WINDS WILL PERSIST THROUGH WEDNESDAY MORNING MAINLY ACROSS
THE SIERRA AND FOOTHILL AREAS WHILE THE UPPER LEVEL JET CORE
PUSHES SOUTH ALONG THE SIERRA. A STRONG COLD FRONT WILL MOVE PUSH
THROUGH THE SIERRA AND WESTERN NEVADA BY EARLY WEDNESDAY MORNING
AND WILL DROP TEMPERATURES BY AS MUCH AS 10 TO 15 DEGREES ON
WEDNESDAY AFTERNOON. HIGHS WILL ONLY REACH INTO THE LOW TO MID 60S
FOR WESTERN NEVADA VALLEYS AND MID 50S ACROSS SIERRA VALLEYS. SNOW
LEVELS BEHIND THE FRONT WILL QUICKLY DROP TO AROUND 4000FT FROM
FAR NORTHERN WASHOE COUNTY TO NEAR 5000 FEET NEAR SUSANVILLE.
THOUGH FORCING IS QUITE STRONG WITH THE FRONT, MOISTURE IS LIMITED
AND ONLY EXPECTING ISOLATED RAIN AND SNOW SHOWERS MAINLY NORTH OF
SUSANVILLE BUT DO NOT EXPECT ANY SIGNIFICANT TRAVEL IMPACTS. LOWS
WEDNESDAY NIGHT WILL DIP BELOW THE FREEZING MARK FOR AREAS GENERALLY
NORTH OF I80 ACROSS WESTERN NEVADA WITH LOWS IN THE 20S FOR SIERRA
VALLEYS. FUENTES

.LONG TERM...THURSDAY THROUGH MONDAY...

VERY FEW ADJUSTMENTS WERE MADE TO THE EXTENDED FORECAST. MODELS
CONTINUE TO REMAIN IN GOOD AGREEMENT WITH TIMING AND PLACEMENT OF
MAJOR FEATURES. LOW PRESSURE THAT WILL SETTLE OVER OREGON TOMORROW
WILL BRING CHANCES OF PRECIPITATION TO NORTHERN CALIFORNIA AND
EXTREME NORTHWESTERN NEVADA THROUGH FRIDAY BEFORE LIFTING NORTHEAST
FRIDAY NIGHT AND SATURDAY. ANOTHER TROUGH PUSHES THROUGH THE BASE OF
THE UPPER LOW SUNDAY INTO MONDAY WITH MORE SLIGHT CHANCES OF
PRECIPITATION. DID EXTEND SLIGHT CHANCES FARTHER SOUTH TO THE TAHOE
BASIN SUNDAY NIGHT SINCE DETERMINISTIC SOLUTIONS ARE VERY SIMILAR ON
TIMING AND PLACEMENT OF THIS TROUGH LENDING TO HIGHER FORECASTER
CONFIDENCE.

TEMPERATURES WILL REMAIN BELOW SEASONAL AVERAGES UNTIL FRIDAY BEFORE
WARMING BACK TO AVERAGES OVER THE WEEKEND. WILL CONTINUE WITH A
FLATTER WARMING CURVE WITH TROUGHING OVER THE WEST COAST AND OVERALL
COOLER MODEL TEMPERATURES. BOYD

&&

.AVIATION...
STRONG SOUTHWEST WINDS EXPECTED TUESDAY AFTERNOON BETWEEN 20-25
KTS WITH GUSTS TO 35-40KTS. WINDS ACROSS THE SIERRA WILL INCREASE
AFTER 12Z TUESDAY MORNING. RIDGE GUSTS NEAR 70KT WILL PROVIDE
TURBULENT CONDITIONS ALONG AND EAST OF RIDGE AREAS THROUGH WED
MORNING. DO NOT EXPECT MUCH LLWS DUE TO WELL- MIXED ATMOSPHERE,
BUT POTENTIAL INCREASES AFTER 04Z TOMORROW NIGHT IF WINDS WERE TO
DECOUPLE. STRONG COLD FRONT WILL PUSH THROUGH KTVL/KTRK/KRNO WED
MORNING AND KMMH WED AFTERNOON, BUT LITTLE IN THE WAY OF PRECIP
EXPECTED. FUENTES

&&

.REV WATCHES/WARNINGS/ADVISORIES...
NV...LAKE WIND ADVISORY FROM 11 AM TO 8 PM PDT TUESDAY FOR PYRAMID
     LAKE IN NVZ004.

     LAKE WIND ADVISORY FROM 11 AM TUESDAY TO 1 PM PDT WEDNESDAY FOR
     LAKE TAHOE IN NVZ002.

CA...LAKE WIND ADVISORY FROM 11 AM TUESDAY TO 1 PM PDT WEDNESDAY FOR
     LAKE TAHOE IN CAZ072.

&&

$$

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