Flash Flood Warning 7, NWS Pendleton, OR

449 
WGUS76 KPDT 142326
FFSPDT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
426 PM PDT THU AUG 14 2014

WAC037-077-142345-
/O.CON.KPDT.FF.W.0007.000000T0000Z-140814T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KITTITAS WA-YAKIMA WA-
426 PM PDT THU AUG 14 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM PDT FOR NORTH
CENTRAL YAKIMA AND SOUTH CENTRAL KITTITAS COUNTIES...

AT 424 PM PDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
HEAVY SHOWER THAT PRODUCED OVER AN INCH OF PRECIPITATION IN A SHORT 
AMOUNT OF TIME.  FLASH FLOODING MAY STILL BE IN PROGRESS EVEN THOUGH 
THE SHOWER HAS SINCE DISSIPATED.  

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROZA

LAT...LON 4670 12060 4683 12049 4685 12036 4676 12034
      4666 12045 4666 12059

$$

BIEDA

828 
WGUS76 KPDT 142337
FFSPDT

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PENDLETON OR
437 PM PDT THU AUG 14 2014

WAC037-077-142347-
/O.EXP.KPDT.FF.W.0007.000000T0000Z-140814T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KITTITAS WA-YAKIMA WA-
437 PM PDT THU AUG 14 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 445 PM PDT FOR NORTH
CENTRAL YAKIMA AND SOUTH CENTRAL KITTITAS COUNTIES...

HEAVY SHOWERS AND ISOLATED THUNDERSTORMS HAVE DISSIPATED OVER THE 
WARNED AREA.  ADDITIONAL SHOWERS AND THUNDERSTORMS MAY CONTINUE TO 
FORM THIS EVENING.  

LAT...LON 4670 12060 4683 12049 4685 12036 4676 12034
      4666 12045 4666 12059

$$

BIEDA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PENDLETON OR
140 PM PDT THU AUG 14 2014

.SHORT TERM...TONIGHT THROUGH SUNDAY...A SLOW MOVING UPPER LEVEL LOW
PRESSURE SYSTEM WILL CONTINUE TO DOMINATE THE WEATHER ACROSS THE
FORECAST AREA FOR THE NEXT 36 TO 48 HOURS. CURRENTLY THE CENTER OF
THE LOW IS OVER CENTRAL OREGON. IT WILL GENERATE SHOWERS AND
THUNDERSTORMS THROUGH EARLY TONIGHT WITH A DECREASE SHOWERS AND
PRECIPITATION AFTER SUNSET. CENTRAL OREGON WILL SEE AN END TO THE
SHOWERS OVERNIGHT BUT LINGERING SHOWERS LATE OVERNIGHT THROUGH EARLY
FRIDAY FOR THE REST OF THE FORECAST AREA. THE UPPER LEVEL LOW WILL
MOVE TO OVER EASTERN WASHINGTON FRIDAY AFTERNOON. THE FOCUS FOR MOST
OF THE SHOWERS AND POTENTIAL THUNDERSTORMS WILL BE OVER THE NORTHERN
AND EASTERN PORTIONS OF THE FORECAST AREA. ACTIVITY WILL INCREASE
WITH DAILY HEATING FRIDAY THEN DECREASE AGAIN AFTER SUNSET. THE LOW
WILL MOVE TO NORTHWEST MONTANA FRIDAY NIGHT ENDING PRECIPITATION FOR
THE FORECAST AREA OVERNIGHT. A DRY WESTERLY FLOW WILL TAKE ITS PLACE
ON SATURDAY WITH TEMPERATURES WARMING. ANOTHER WEAK LOW PRESSURE
SYSTEM WILL BEGIN TO TAKE UP A POSITION OFF THE OREGON COAST LATE
SATURDAY AND SUNDAY. THIS WILL TURN THE FLOW SOUTHERLY ACROSS
EASTERN OREGON WITH SOME WEAK INSTABILITY OVER SOUTHERN OREGON
LEADING TO THE POTENTIAL FOR ISOLATED THUNDERSTORMS DEVELOPING. HAVE
INCLUDED A SLIGHT CHANCE OF THUNDERSTORMS IN CENTRAL OREGON ON
SUNDAY IN CASE SOME OF THIS CREEPS NORTHWARD IN THE SOUTHERLY FLOW.

.LONG TERM...SUNDAY NIGHT THROUGH THURSDAY.  A FEW CHANGES WERE MADE
TO THE EXTENDED FORECAST.  ALTHOUGH THE 12Z GFS AND ECMWF DIFFER
SOMEWHAT FROM THE PREVIOUS RUNS...BOTH ARE IN GENERAL AGREEMENT
WITH AN UPPER LOW DEVELOPING OFF THE NORTHERN CALIFORNIA COAST
ON SUNDAY NIGHT AND MONDAY.  A WEAK SOUTHERLY FLOW OVER OREGON MAY
TAP IN MOISTURE FROM THE SYSTEM THAT COULD RESULT IN ISOLATED
THUNDERSTORMS OVER CENTRAL OREGON.  WILL INTRODUCE A SLIGHT CHANCE
IN THE HIGHER TERRAIN OF THE DESCHUTES NATIONAL FOREST AND
OCHOCO-JOHN DAY HIGHLANDS...BUT THE FUTURE SHIFTS MAY DECIDE TO
INCREASE THE AREAL COVERAGE IF MODELS CONTINUE TO ADVERTISE THIS
SYNOPTIC PATTERN.  WASHINGTON STATE AND NORTHERN OREGON WILL BE
UNDER A DRIER WESTERLY FLOW.  A THE POLAR JET MOVES SOUTHWARD...THE
WESTERLY FLOW WILL INCREASE OVER WA/OR ON TUESDAY.  THERE IS A HINT
OF A MARINE PUSH ON TUESDAY...SO I INCREASED WINDS TO SHOW BREEZY
CONDITIONS IN THE EASTERN COLUMBIA RIVER GORGE AND THE KITTITAS
VALLEY.  WINDS WERE INCREASED IN MOST ZONES ON WEDNESDAY...AS BOTH
MODELS ARE INDICATING A SHORTWAVE TROUGH QUICKLY TRACKING EASTWARD
ACROSS NORTHERN WASHINGTON.  POPS WERE INCREASED TO SLIGHT CHANCE
ALONG THE WASHINGTON CASCADE EAST SLOPES AND THE NORTHERN BLUE
MOUNTAINS.  IT'S HARD TO KEEP HOPES UP TOO HIGH...BUT BOTH THE GFS
AND ECMWF ARE ADVERTISING ANOTHER STRONGER SHORTWAVE ON THURSDAY
NIGHT AND FRIDAY THAT COULD POTENTIALLY BRING MUCH COOLER AIR AND
MOUNTAIN SHOWERS.  WISTER

&&

.AVIATION...00Z TAFS. THE BROAD UPPER TROUGH IS CENTERED OVER
EASTERN OREGON...AND SHOWERS AND THUNDERSTORMS ARE INCREASING IN
COVERAGE ACROSS THE FORECAST AREA.  IT'S DIFFICULT TO SAY WHETHER
STORMS WILL AFFECT THE TERMINAL AIRPORTS...BUT WILL INCLUDE VCTS IN
ALL TAF SITES. THE SYSTEM WILL NOT LEAVE THE REGION UNTIL AFTER
00Z/16TH.  VARIABLE CIGS BETWEEN 5000-15000 FEET AGL ARE EXPECTED
FOR THE NEXT 24 HOURS.  BRIEF MVFR OR LESS CIGS/VSBYS ARE POSSIBLE
NEAR THUNDERSTORMS.  WISTER

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  61  84  62  87 /  50  30  20  10
ALW  65  85  67  88 /  60  40  20  10
PSC  65  88  65  90 /  40  20  20   0
YKM  61  85  62  87 /  40  40  20   0
HRI  63  87  63  90 /  40  20  10   0
ELN  60  83  61  85 /  40  50  20  10
RDM  50  80  50  84 /  30   0  10   0
LGD  55  79  55  84 /  70  50  30  10
GCD  54  80  57  84 /  60  20  10  10
DLS  65  85  66  88 /  30  10  10   0

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...NONE.
WA...FLASH FLOOD WATCH UNTIL 11 PM PDT THIS EVENING WAZ520.

&&

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

91/85/85