Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 241148
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
348 AM PST FRI NOV 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-SW 8-15 MPH.     SW 10-15 MPH.
TRANSPORT WINDS               SE-SW 8-15 MPH.     SW 20-30 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SAT NOV 25        POOR.

VENTILATION INDEX (CATEGORY)  35 (POOR).          741 (GOOD).
OUTLOOK FOR SAT NOV 25        38 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 4-7 MPH.          SW 8-15 MPH.
TRANSPORT WINDS               W 4-7 MPH.          W 10-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SAT NOV 25        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          479 (FAIR).
OUTLOOK FOR SAT NOV 25        33 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 4-8 MPH.          SW 5-10 MPH.
TRANSPORT WINDS               NW 10-20 MPH.       SW 10-20 MPH.
MIXING HEIGHT                 4000 FT MSL.        7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SAT NOV 25        FAIR.

VENTILATION INDEX (CATEGORY)  92 (POOR).          334 (FAIR).
OUTLOOK FOR SAT NOV 25        213 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      227 (POOR)
ELLENSBURG    320 (FAIR)
GOLDENDALE    274 (POOR)
TRI-CITIES    567 (FAIR)
WALLA WALLA   736 (GOOD)
YAKIMA        159 (POOR)
BEND          286 (POOR)
PRINEVILLE    249 (POOR)
ENTERPRISE    201 (POOR)
HERMISTON     627 (GOOD)
JOHN DAY      179 (POOR)
LA GRANDE     329 (FAIR)
MADRAS        524 (FAIR)
MEACHAM       378 (FAIR)
PENDLETON     613 (GOOD)
REDMOND       249 (POOR)
SENECA        159 (POOR)
THE DALLES    154 (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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