Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 301100
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PDT SAT MAY 30 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 4-9 MPH.         SW-W 10-15 MPH.
TRANSPORT WINDS               SE 4-9 MPH.         SW 17-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 31        FAIR.

VENTILATION INDEX (CATEGORY)  53 (POOR).          914 (GOOD).
OUTLOOK FOR SUN MAY 31        593 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          W 5-10 MPH.
TRANSPORT WINDS               W 3-7 MPH.          SW 20-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 31        FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          620 (GOOD).
OUTLOOK FOR SUN MAY 31        366 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-7 MPH.         W 3-7 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         SW 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       12000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 31        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          605 (GOOD).
OUTLOOK FOR SUN MAY 31        279 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      494 (FAIR)
ELLENSBURG    638 (GOOD)
GOLDENDALE    534 (FAIR)
TRI-CITIES   1050 (GOOD)
WALLA WALLA   687 (GOOD)
YAKIMA        473 (FAIR)
BEND          531 (FAIR)
PRINEVILLE    670 (GOOD)
ENTERPRISE    422 (FAIR)
HERMISTON    1025 (GOOD)
JOHN DAY      742 (GOOD)
LA GRANDE     541 (FAIR)
MADRAS        530 (FAIR)
MEACHAM       438 (FAIR)
PENDLETON     667 (GOOD)
REDMOND       467 (FAIR)
SENECA        672 (GOOD)
THE DALLES    625 (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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