Area Forecast Discussion
Issued by NWS Pendleton, OR

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS66 KPDT 042140
AFDPDT

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
240 PM PDT SAT JUL 4 2015

.SHORT TERM...TODAY THROUGH TUESDAY...ANOTHER HOT AND DRY AFTERNOON
OUT THERE TODAY WITH NEAR RECORD HIGH TEMPERATURES EXPECTED. AN AREA
OF MID TO HIGH LEVEL CLOUDS CONTINUES TO GRADUALLY MOVE NORTH ACROSS
MUCH OF OUR OREGON FORECAST ZONES THIS AFTERNOON. THE MOST EXTENSIVE
AND THICKER CLOUD COVER IS CONFINED TO THE OCHOCO-JOHN DAY HIGHLANDS
AND CENTRAL OREGON...WHERE TEMPERATURES ARE BEING HELD DOWN SOMEWHAT
COMPARED TO YESTERDAY. THESE CLOUDS ARE EXPECTED TO LIFT NORTH INTO
EXTREME SOUTHERN WASHINGTON THIS EVENING BEFORE SHIFTING BACK SOUTH
THROUGH THE DAY ON SUNDAY AS AN UPPER LEVEL TROUGH MOVES THROUGH
SHIFTING THE FLOW TO NORTH-NORTHWESTERLY. THIS DISTURBANCE IS NOT
EXPECTED TO BRING ANY PRECIPITATION TO THE AREA...HOWEVER WINDS ARE
FORECAST TO INCREASE ACROSS THE NORTHERN COLUMBIA BASIN OF
WASHINGTON...THE KITTITAS AND YAKIMA VALLEYS DURING THE EVENING AND
OVERNIGHT HOURS. SEE THE FIRE WEATHER SECTION BELOW FOR MORE DETAILS
ON EXPECTED WIND SPEEDS. THIS INCREASE IN WIND SPEEDS MAY CAUSE
PATCHY AREAS OF BLOWING DUST IN THESE AREAS STARTING LATE THIS
EVENING THROUGH THE EARLY AFTERNOON HOURS SUNDAY. BEHIND THIS WEAK
DISTURBANCE CONDITIONS WILL REMAIN BREEZY THROUGH AT LEAST THE EARLY
AFTERNOON HOURS ON SUNDAY...TEMPERATURES ARE EXPECTED TO BE A FEW
DEGREES COOLER TOMORROW...WITH HIGHS MAINLY 95-101 IN THE LOWER
ELEVATIONS AND 80S TO LOWER 90S IN THE MOUNTAINS. BY SUNDAY
AFTERNOON AND EARLY EVENING THERE WILL BE A SLIGHT CHANCE FOR A
SHOWER OR THUNDERSTORM OVER THE WALLOWA MOUNTAINS AND EXTREME
SOUTHERN DESCHUTES COUNTIES...OTHERWISE IT SHOULD REMAIN DRY. MONDAY
AND TUESDAY WILL CONTINUE TO SEE ABOVE AVERAGE TEMPERATURES WITH
HIGHS EXPECTED TO BE IN THE MID-90S TO LOWER 100S FOR THE VALLEYS
AND BASINS EACH DAY. THERE WILL ALSO BE A SLIGHT CHANCE FOR FOR
AFTERNOON/EVENING SHOWERS AND THUNDERSTORMS ACROSS THE SOUTHERN
PORTION OF OUR CWA ON MONDAY AND ESPECIALLY TUESDAY AS MORE
INSTABILITY AND MOISTURE WORK INTO THE AREA AHEAD OF AN UPPER LEVEL
LOW. 77

.LONG TERM...TUESDAY NIGHT THROUGH SATURDAY. UPPER LEVEL LOW PRESSURE
SYSTEM WILL BE APPROACHING THE REGION BY WEDNESDAY AND IS EXPECTED
TO MOVE THROUGH THE AREA BY SATURDAY.  ON WEDNESDAY THE LOW IS STILL
FAR ENOUGH SOUTH AND WEST OF THE AREA WITH ONLY A SLIGHT CHANCE OF
THUNDERSTORMS OVER SOUTHERN OREGON.  AS THE LOW MOVES INLAND
SCATTERED SHOWERS AND THUNDERSTORM WILL SPREAD NORTH AND EAST ACROSS
OREGON...BUT IT WILL REMAIN DRY AND WARM OVER EASTERN WASHINGTON.
THE LOW PRESSURE SYSTEM WILL BE MOVING OUT OF THE REGION FRIDAY
NIGHT AND EARLY SATURDAY WITH COOLER TEMPERATURES AND SOME GUSTY
WINDS.  93


&&

.AVIATION...00Z TAFS...VFR CONDITIONS WILL PREVAIL OVER THE NEXT 24
HOURS.  SCT-BKN CIRRUS AT 25K FEET WILL CONTINUE OVER MAINLY OREGON
OVERNIGHT WITH INCREASINGLY WEST TO NORTHWEST FLOW OVER WASHINGTON
AS WEAK WEATHER SYSTEM MOVES THROUGH SOUTHERN CANADA.  WEST TO
NORTHWEST WIND 10-20KTS WILL PERSIST THROUGH 06Z AT KDLS AND KPDT
AND 10 KTS AND LESS AT OTHER TAFS SITES. 93


&&

.FIRE WEATHER...THE RED FLAG WARNINGS FOR WIND AND LOW RELATIVE
HUMIDITY FOR PORTIONS OF THE COLUMBIA BASIN...EASTERN COLUMBIA RIVER
GORGE...AND NORTH CENTRAL AND CENTRAL OREGON REMAIN IN EFFECT.  RH`S
AND WINDS ARE SIMILAR TO YESTERDAY...I.E. 8 TO 15 PERCENT AND 10-15
MPH FOR MOST OF THE REGION.  WINDS MAY BE LESS THAN YESTERDAY BUT
WILL STILL BRING THE POSSIBILITY OF RAPID FIRE SPREAD IN SOME AREAS
WHERE WINDS WILL INCREASE TO AROUND 10-20 MPH THIS AFTERNOON AND
EVENING.  THE WARNING FOR THE HANFORD DISTRICT AND THE YAKIMA VALLEY
IS IN EFFECT THROUGH SUNDAY MORNING. NORTHERLY WINDS WILL INCREASE
THERE TONIGHT AND GUSTS TO 30-35 MPH ARE POSSIBLE...MAINLY ALONG
RATTLESNAKE RIDGE.  THE FIRE WEATHER CONCERNS WILL SHIFT TO THE
THUNDERSTORM POTENTIAL DURING THE WORK WEEK.  THE THREAT OF
THUNDERSTORMS WILL BE A SLIGHT CHANCE FOR OUR FAR SOUTHERN ZONES MON-
WED BUT THE THREAT INCREASES FARTHER NORTH WITH ISOLATED-SCATTERED
THUNDERSTORMS POSSIBLE THURSDAY AND FRIDAY.  THE SHORT- AND LONG-
TERM DISCUSSIONS WILL PROVIDE MORE DETAILS.  WISTER


&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  65  97  64  98 /   0   0   0   0
ALW  71  96  69  97 /   0   0   0   0
PSC  68 100  66 102 /   0   0   0   0
YKM  68  99  67  97 /   0   0   0   0
HRI  66 100  65 101 /   0   0   0   0
ELN  65  98  63  99 /   0   0   0   0
RDM  56  94  58  97 /   0   0   0  10
LGD  58  91  57  91 /   0   0   0  10
GCD  59  96  57  99 /  10   0   0  10
DLS  69 101  69 102 /   0   0   0   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...RED FLAG WARNING UNTIL 8 PM PDT THIS EVENING FOR ORZ610-639>641.

WA...RED FLAG WARNING UNTIL 8 PM PDT THIS EVENING FOR WAZ639.

     RED FLAG WARNING UNTIL 9 AM PDT SUNDAY FOR WAZ675.

&&

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

$$

77/93/93/85


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.