Area Forecast Discussion
Issued by NWS Pendleton, OR

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FXUS66 KPDT 040351 AAA
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
845 PM PDT SUN MAY 3 2015

.UPDATE...OTHER THAN SOME MID/HIGH LEVEL CLOUDS OVER THE FAR SE
ZONES THE REMAINDER OF THE AREA REMAINS UNDER MOSTLY CLEAR SKIES
THAT WILL PERSIST OVERNIGHT. SOME MINOR ADJUSTMENTS WERE MADE TO LOW
TEMPERATURES BUT THE REST OF THE SHORT TERM FORECAST APPEARS ON
TRACK FOR NOW.

&&

.AVIATION...VFR CONDITIONS WILL PERSIST FOR THE NEXT 24 HOURS ACROSS
ALL TAF SITES.

&&

.PREV DISCUSSION... /ISSUED 303 PM PDT SUN MAY 3 2015/

SHORT TERM...TONIGHT THROUGH WEDNESDAY...HIGH PRESSURE WILL
CONTINUE OVER THE REGION FOR ONE MORE DAY. THIS WILL PROVIDE
CONTINUED VERY WARM TEMPERATURES THROUGH MONDAY. AN APPROACHING
UPPER LEVEL LOW PRESSURE SYSTEM WILL START TO ENHANCE SOME
INSTABILITY OVER FAR NORTHEAST OREGON MONDAY AFTERNOON AND NIGHT.
THIS WILL LEAD TO A CHANCE OF SHOWERS AND POSSIBLE THUNDERSTORMS FOR
MOUNTAIN AREAS NORTH AND EAST OF JOHN DAY. THE UPPER LEVEL LOW WILL
BEGIN TO MOVE INTO THE PACIFIC NORTHWEST MONDAY NIGHT AND TUESDAY
AND CONTINUE OVER THE REGION ON WEDNESDAY. THIS WILL LEAD TO COOLER
TEMPERATURES AND PROVIDE MORE WIDESPREAD SHOWERS AND POSSIBLE
THUNDERSTORMS ACROSS THE FORECAST AREA.

LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY...AN UPPER LEVEL LOW
WILL MOVE SOUTH FROM EASTERN OREGON TO NORTHERN CALIFORNIA WEDNESDAY
NIGHT AND THURSDAY...THEN SOUTHEAST TO SOUTHERN NEVADA FRIDAY.
EXPECT A STRONG DIURNAL COMPONENT TO SHOWER AND THUNDERSTORM
ACTIVITY WITH DAYTIME HEATING ENHANCING ANY DISTURBANCES ROTATING
AROUND THE LOW. AS THE LOW DIVES SOUTH THURSDAY...RETURN FLOW ALONG
CENTRAL OREGON AND THE NORTHEAST MOUNTAINS WILL PROVIDE THE BEST
CHANCES FOR THUNDER...WITH SHOWERS ELSEWHERE. BY FRIDAY AND SATURDAY
THE BEST CHANCE FOR THUNDER WILL BE OVER GRANT COUNTY AND NORTHEAST
OREGON AS THE LOW MOVES FARTHER EAST. UNSETTLED WEATHER WILL
CONTINUE SUNDAY. COONFIELD

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  42  77  46  65 /   0   0   0  10
ALW  46  80  48  67 /   0   0  10  10
PSC  41  82  48  70 /   0   0   0  10
YKM  42  79  44  66 /   0   0   0  20
HRI  41  80  48  69 /   0   0   0  10
ELN  41  76  45  63 /   0   0   0  20
RDM  36  75  37  61 /   0   0   0  10
LGD  38  76  41  62 /   0  20  20  10
GCD  39  82  41  64 /   0  20  10  10
DLS  42  79  47  66 /   0   0  10  20

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...NONE.
&&

FOR ADDITIONAL WEATHER INFORMATION, CHECK OUR WEB SITE AT...
WWW.WEATHER.GOV/PENDLETON

$$

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