Area Forecast Discussion
Issued by NWS Reno, NV

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FXUS65 KREV 012122
AFDREV

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RENO NV
222 PM PDT MON SEP 1 2014

.SYNOPSIS...
ABOVE AVERAGE TEMPERATURES WILL RETURN FOR TUESDAY. A TROUGH OF
LOW PRESSURE WILL DROP SOUTH INTO THE REGION TUESDAY NIGHT AND
WEDNESDAY. THIS WILL BRING SLIGHTLY COOLER TEMPERATURES FOR THE
REST OF THE WEEK.

&&

.SHORT TERM...
NORTHWEST FLOW ALOFT CONTINUES INTO EARLY TUESDAY BEFORE THE FLOW
BECOMES MORE WESTERLY. A DEEPENING TROUGH OVER THE PACIFIC NORTHWEST
WILL DROP TOWARD THE REGION LATE TUESDAY. AHEAD OF THIS TROUGH
WINDS BEGIN TO INCREASE...BUT GUSTS SHOULD REMAIN BELOW 30 MPH. A
DRY SLOT WILL ALSO MOVE IN AHEAD OF TROUGH BRINGING LOWER HUMIDITY
VALUES TO MID SLOPES AND RIDGES LATE TONIGHT AND CONTINUE THROUGH
TUESDAY NIGHT. INCREASED WINDS TUESDAY WILL ALSO AID MIXING AND
RESULT IN ABOVE NORMAL TEMPERATURES.

A SURFACE BOUNDARY ASSOCIATED WITH THE UPPER LEVEL TROUGH WILL
PUSH THROUGH LATE TUESDAY NIGHT AND SWITCH THE LOW LEVEL WINDS TO
THE NORTH AND NORTHEAST. THIS WILL USHER IN SLIGHTLY COOLER
TEMPERATURES FOR WEDNESDAY...NEAR NORMAL AS OPPOSED TO ABOVE
NORMAL. THESE WINDS WILL SHIFT TO A MORE EAST TO NORTHEAST
DIRECTION LATE TUESDAY NIGHT AND INCREASE OVER THE RIDGES THROUGH
THE NIGHT.

THE OVERALL FLOW WEAKENS WEDNESDAY BUT TEMPERATURES REMAIN AT OR
SLIGHTLY BELOW AVERAGE. A LACK OF MOISTURE WILL LIMIT THE CHANCES
FOR ANY KIND OF PCPN THROUGH WEDNESDAY NIGHT...AND WILL LIKELY
LIMIT THE EXTENT OF ANY CLOUDINESS TO JUST PARTLY CLOUDY OVER NRN
SECTIONS OF THE FORECAST AREA. 20

.LONG TERM...THURSDAY THROUGH TUESDAY..
AN UPPER LEVEL TROUGH WILL BE SPREAD ACROSS THE WESTERN U.S. NEXT
WEEK. MODEL GUIDANCE IN GENERAL AGREEMENT WITH MAINTAINING THIS
FEATURE THROUGH NEXT WEEKEND AND INTO THE FOLLOWING WEEK WHICH WILL
PROVIDE US WITH COOLER TEMPERATURES NEARER TO SEASONAL AVERAGES.
MODELS SHOW SOME DISCREPANCIES IN THE DETAILS OF THE POSITION OF THE
UPPER LOW BUT THUS FAR NEITHER THE GFS OR ECMWF SHOW ENOUGH INSTABILITY
OR MOISTURE WITH THE LOW TO PROVIDE ANY APPRECIABLE CHANCES FOR
PRECIPITATION AT THIS TIME.

THE BULK OF THE MOISTURE LOOKS TO ADVECT EAST ACROSS UTAH BUT THERE
IS ENOUGH SPREAD IN THE POSITION OF THE TROUGH IN THE GEFS TO NOT
RULE OUT A POTENTIAL WESTWARD SHIFT OF THIS MOISTURE SWATH. THIS
WOULD PROVIDED BETTER CHANCES FOR PRECIPITATION BUT FOR NOW WILL
LEAVE MENTION OUT OF THE FORECAST AND WILL MAINTAIN HIGHER CLOUD
COVER, LIGHT NORTH TO NORTHEASTERLY WINDS, AND SEASONABLE
TEMPERATURES. HIGH TEMPERATURES ARE EXPECTED TO BE IN THE MID TO
UPPER 80S ACROSS WESTERN NEVADA AND MID TO UPPER 70 ACROSS SIERRA
VALLEYS. FUENTES
&&

.AVIATION...
VFR CONDITIONS EXPECTED THROUGH TUESDAY AS HIGH PRESSURE BUILDS INTO
THE AREA. LIGHT HAZE BUT MINIMAL REDUCTION TO VISIBILITY IS
POSSIBLE FROM SMOKE FROM WILDFIRES ACROSS NORTHERN CALIFORNIA AND
OREGON. LIGHT AFTERNOON BREEZES AND MINIMAL CLOUD COVER EXPECTED.
FUENTES
&&

.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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