Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 041210
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
510 AM PDT WED MAY 4 2016

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-11 MPH.         NE 7-10 MPH.
TRANSPORT WINDS               SW 10-17 MPH.       E 6-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR THU MAY 5         FAIR.

VENTILATION INDEX (CATEGORY)  90 (POOR).          268 (POOR).
OUTLOOK FOR THU MAY 5         268 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 3-7 MPH.         E 5-7 MPH.
TRANSPORT WINDS               W 6-13 MPH.         S 7-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU MAY 5         POOR.

VENTILATION INDEX (CATEGORY)  87 (POOR).          202 (POOR).
OUTLOOK FOR THU MAY 5         144 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 1-3 MPH.         SE 8-13 MPH.
TRANSPORT WINDS               SW 2-5 MPH.         S 14-19 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU MAY 5         FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          687 (GOOD).
OUTLOOK FOR THU MAY 5         224 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      156 (POOR)
ELLENSBURG    339 (FAIR)
GOLDENDALE    131 (POOR)
TRI-CITIES    167 (POOR)
WALLA WALLA   363 (FAIR)
YAKIMA        237 (POOR)
BEND          315 (FAIR)
PRINEVILLE    295 (POOR)
ENTERPRISE    792 (GOOD)
HERMISTON     186 (POOR)
JOHN DAY     1050 (GOOD)
LA GRANDE     703 (GOOD)
MADRAS        130 (POOR)
MEACHAM       593 (FAIR)
PENDLETON     337 (FAIR)
REDMOND       203 (POOR)
SENECA       1050 (GOOD)
THE DALLES     41 (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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