Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 240953
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
253 AM PDT SUN SEP 24 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-6 MPH.         SW-NW 3-7 MPH.
TRANSPORT WINDS               SE 2-6 MPH.         NE 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON SEP 25        FAIR.

VENTILATION INDEX (CATEGORY)  32 (POOR).          307 (FAIR).
OUTLOOK FOR MON SEP 25        438 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-6 MPH.          S 3-7 MPH.
TRANSPORT WINDS               W 2-6 MPH.          N 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON SEP 25        FAIR.

VENTILATION INDEX (CATEGORY)  31 (POOR).          256 (POOR).
OUTLOOK FOR MON SEP 25        214 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-9 MPH.         NW 5-10 MPH.
TRANSPORT WINDS               NW 4-9 MPH.         NE 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR MON SEP 25        GOOD.

VENTILATION INDEX (CATEGORY)  26 (POOR).          632 (GOOD).
OUTLOOK FOR MON SEP 25        230 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      239 (POOR)
ELLENSBURG    252 (POOR)
GOLDENDALE    256 (POOR)
TRI-CITIES    294 (POOR)
WALLA WALLA   366 (FAIR)
YAKIMA        232 (POOR)
BEND          250 (POOR)
PRINEVILLE    336 (FAIR)
ENTERPRISE    595 (FAIR)
HERMISTON     245 (POOR)
JOHN DAY      503 (FAIR)
LA GRANDE     639 (GOOD)
MADRAS        275 (POOR)
MEACHAM       403 (FAIR)
PENDLETON     366 (FAIR)
REDMOND       331 (FAIR)
SENECA        512 (FAIR)
THE DALLES    172 (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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