Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 191107
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
407 AM PDT THU OCT 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                 S 9-15 MPH.         W 12-18 MPH.
TRANSPORT WINDS               S 10-16 MPH.        SW 18-26 MPH.
MIXING HEIGHT                 NEAR SURFACE.       3500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR FRI OCT 20        GOOD.

VENTILATION INDEX (CATEGORY)  33 (POOR).          393 (FAIR).
OUTLOOK FOR FRI OCT 20        1050 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 15-25 MPH.       SW 14-22 MPH.
TRANSPORT WINDS               S 10-18 MPH.        SW 22-32 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR FRI OCT 20        GOOD.

VENTILATION INDEX (CATEGORY)  119 (POOR).         785 (GOOD).
OUTLOOK FOR FRI OCT 20        1050 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 7-13 MPH.         S 15-25 MPH.
TRANSPORT WINDS               S 10-16 MPH.        SW 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI OCT 20        GOOD.

VENTILATION INDEX (CATEGORY)  84 (POOR).          1049 (GOOD).
OUTLOOK FOR FRI OCT 20        1050 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      482 (FAIR)
ELLENSBURG    379 (FAIR)
GOLDENDALE    231 (POOR)
TRI-CITIES    376 (FAIR)
WALLA WALLA   497 (FAIR)
YAKIMA        691 (GOOD)
BEND          838 (GOOD)
PRINEVILLE    866 (GOOD)
ENTERPRISE   1050 (GOOD)
HERMISTON     295 (POOR)
JOHN DAY     1050 (GOOD)
LA GRANDE    1050 (GOOD)
MADRAS        564 (FAIR)
MEACHAM      1009 (GOOD)
PENDLETON     528 (FAIR)
REDMOND       933 (GOOD)
SENECA       1020 (GOOD)
THE DALLES    141 (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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