Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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413
AUUS46 KPDT 191200
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
400 AM PST SUN FEB 19 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 VRB 2-6 MPH.        SW 10-20 MPH.
TRANSPORT WINDS               VRB 2-6 MPH.        SW 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON FEB 20        FAIR.

VENTILATION INDEX (CATEGORY)  30 (POOR).          208 (POOR).
OUTLOOK FOR MON FEB 20        531 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 0-4 MPH.         S 5-10 MPH.
TRANSPORT WINDS               SW 0-4 MPH.         SW 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON FEB 20        FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          137 (POOR).
OUTLOOK FOR MON FEB 20        176 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         S 5-10 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         SW 15-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON FEB 20        GOOD.

VENTILATION INDEX (CATEGORY)  49 (POOR).          313 (FAIR).
OUTLOOK FOR MON FEB 20        612 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      106 (POOR)
ELLENSBURG    121 (POOR)
GOLDENDALE    133 (POOR)
TRI-CITIES     79 (POOR)
WALLA WALLA   338 (FAIR)
YAKIMA        120 (POOR)
BEND          613 (GOOD)
PRINEVILLE    546 (FAIR)
ENTERPRISE    270 (POOR)
HERMISTON     125 (POOR)
JOHN DAY      450 (FAIR)
LA GRANDE     333 (FAIR)
MADRAS        811 (GOOD)
MEACHAM       459 (FAIR)
PENDLETON     349 (FAIR)
REDMOND       611 (GOOD)
SENECA        496 (FAIR)
THE DALLES    162 (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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