Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 271144
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
445 AM PDT MON APR 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 0-3 MPH.         NE 4-8 MPH.
TRANSPORT WINDS               SW 2-6 MPH.         SE 3-6 MPH.
MIXING HEIGHT                 2500 FT MSL.        7000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE APR 28        GOOD.

VENTILATION INDEX (CATEGORY)  41 (POOR).          145 (POOR).
OUTLOOK FOR TUE APR 28        384 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRB 0-3 MPH.        SE 4-7 MPH.
TRANSPORT WINDS               NW 0-3 MPH.         SE 5-8 MPH.
MIXING HEIGHT                 2000 FT MSL.        6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE APR 28        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          224 (POOR).
OUTLOOK FOR TUE APR 28        511 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRB 0-3 MPH.        VRB 0-4 MPH.
TRANSPORT WINDS               S 0-3 MPH.          SE 0-4 MPH.
MIXING HEIGHT                 4500 FT MSL.        8000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR TUE APR 28        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          64 (POOR).
OUTLOOK FOR TUE APR 28        216 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      254 (POOR)
ELLENSBURG    347 (FAIR)
GOLDENDALE    182 (POOR)
TRI-CITIES    261 (POOR)
WALLA WALLA    89 (POOR)
YAKIMA        276 (POOR)
BEND          325 (FAIR)
PRINEVILLE    369 (FAIR)
ENTERPRISE    118 (POOR)
HERMISTON     108 (POOR)
JOHN DAY       98 (POOR)
LA GRANDE      82 (POOR)
MADRAS        228 (POOR)
MEACHAM       102 (POOR)
PENDLETON      88 (POOR)
REDMOND       383 (FAIR)
SENECA         97 (POOR)
THE DALLES    228 (POOR)

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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