Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 211229
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
529 AM PDT SAT OCT 21 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 8-14 MPH.         S 11-18 MPH.
TRANSPORT WINDS               SE 8-16 MPH.        S 24-27 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SUN OCT 22        GOOD.

VENTILATION INDEX (CATEGORY)  66 (POOR).          606 (GOOD).
OUTLOOK FOR SUN OCT 22        1035 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-9 MPH.          SE 7-13 MPH.
TRANSPORT WINDS               SE 4-8 MPH.         S 12-21 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN OCT 22        GOOD.

VENTILATION INDEX (CATEGORY)  51 (POOR).          434 (FAIR).
OUTLOOK FOR SUN OCT 22        1048 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 6-6 MPH.          S 20-27 MPH.
TRANSPORT WINDS               S 6-11 MPH.         S 24-28 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN OCT 22        FAIR.

VENTILATION INDEX (CATEGORY)  68 (POOR).          616 (GOOD).
OUTLOOK FOR SUN OCT 22        361 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      222 (POOR)
ELLENSBURG    332 (FAIR)
GOLDENDALE    169 (POOR)
TRI-CITIES    639 (GOOD)
WALLA WALLA   600 (FAIR)
YAKIMA        388 (FAIR)
BEND          725 (GOOD)
PRINEVILLE    377 (FAIR)
ENTERPRISE    455 (FAIR)
HERMISTON     593 (FAIR)
JOHN DAY      280 (POOR)
LA GRANDE     635 (GOOD)
MADRAS        616 (GOOD)
MEACHAM       339 (FAIR)
PENDLETON     578 (FAIR)
REDMOND       646 (GOOD)
SENECA        300 (POOR)
THE DALLES    132 (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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