Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 281100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT THU MAY 28 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 3-7 MPH.         S-SW 5-10 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         E 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  32 (POOR).          559 (FAIR).
OUTLOOK FOR FRI MAY 29        629 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          S 5-10 MPH.
TRANSPORT WINDS               W 3-7 MPH.          SE 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          484 (FAIR).
OUTLOOK FOR FRI MAY 29        904 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 1-5 MPH.         NE 3-7 MPH.
TRANSPORT WINDS               SW 1-5 MPH.         NW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI MAY 29        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          436 (FAIR).
OUTLOOK FOR FRI MAY 29        759 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      399 (FAIR)
ELLENSBURG    446 (FAIR)
GOLDENDALE    512 (FAIR)
TRI-CITIES    765 (GOOD)
WALLA WALLA   423 (FAIR)
YAKIMA        384 (FAIR)
BEND          281 (POOR)
PRINEVILLE    334 (FAIR)
ENTERPRISE    473 (FAIR)
HERMISTON     586 (FAIR)
JOHN DAY      443 (FAIR)
LA GRANDE     399 (FAIR)
MADRAS        395 (FAIR)
MEACHAM       379 (FAIR)
PENDLETON     409 (FAIR)
REDMOND       257 (POOR)
SENECA        494 (FAIR)
THE DALLES    622 (GOOD)

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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