Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 271100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT WED MAY 27 2015

*** AIR DISPERSION CATEGORIES:   GOOD, FAIR, POOR ***

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 1-5 MPH.         SW-W 5-10 MPH.
TRANSPORT WINDS               SE 1-5 MPH.         NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 28        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          272 (POOR).
OUTLOOK FOR THU MAY 28        385 (FAIR).

FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         S 5-10 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 28        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          294 (POOR).
OUTLOOK FOR THU MAY 28        311 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-8 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               NW 4-8 MPH.         NW 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU MAY 28        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          319 (FAIR).
OUTLOOK FOR THU MAY 28        291 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      335 (FAIR)
ELLENSBURG    291 (POOR)
GOLDENDALE    324 (FAIR)
TRI-CITIES    265 (POOR)
WALLA WALLA   252 (POOR)
YAKIMA        275 (POOR)
BEND          334 (FAIR)
PRINEVILLE    393 (FAIR)
ENTERPRISE    346 (FAIR)
HERMISTON     281 (POOR)
JOHN DAY      561 (FAIR)
LA GRANDE     359 (FAIR)
MADRAS        330 (FAIR)
MEACHAM       247 (POOR)
PENDLETON     268 (POOR)
REDMOND       354 (FAIR)
SENECA        612 (GOOD)
THE DALLES    371 (FAIR)

METEOROLOGICAL INFORMATION PROVIDED IN THIS PRODUCT REPRESENTS ONLY
SOME OF THE FACTORS USED IN BURN DECISIONS.  BURN DECISIONS ARE
OUTSIDE THE PURVIEW OF THE NATIONAL WEATHER SERVICE.

THE VENTILATION INDEX IS A TOOL TO ASSIST SMOKE MANAGEMENT
AGENCIES IN DETERMINING BURN OR NO BURN DECISIONS.  A VENTILATION
INDEX GRAPHIC IS ON THE PENDLETON WEBSITE AT THE FOLLOWING ADDRESS:
HTTP://WWW.WRH.NOAA.GOV/PDT/FORECAST/FWXGRAPHICALVENTILATION.PHP?WFO=PDT

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.

$$



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