Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 221315
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
515 AM PST WED FEB 22 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 5-10 MPH.        W-SW 6-10 MPH.
TRANSPORT WINDS               SW 5-10 MPH.        W-SW 6-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU FEB 23        FAIR.

VENTILATION INDEX (CATEGORY)  57 (POOR).          264 (POOR).
OUTLOOK FOR THU FEB 23        322 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 4-8 MPH.          W 4-7 MPH.
TRANSPORT WINDS               W 4-8 MPH.          W-NW 6-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR THU FEB 23        POOR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          234 (POOR).
OUTLOOK FOR THU FEB 23        300 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 5-10 MPH.      NW 5-11 MPH.
TRANSPORT WINDS               W 7-11 MPH.         NW 7-14 MPH.
MIXING HEIGHT                 4500 FT MSL.        7000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU FEB 23        GOOD.

VENTILATION INDEX (CATEGORY)  152 (POOR).         274 (POOR).
OUTLOOK FOR THU FEB 23        645 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      359 (FAIR)
ELLENSBURG    350 (FAIR)
GOLDENDALE    236 (POOR)
TRI-CITIES    247 (POOR)
WALLA WALLA   309 (FAIR)
YAKIMA        205 (POOR)
BEND          406 (FAIR)
PRINEVILLE    491 (FAIR)
ENTERPRISE    258 (POOR)
HERMISTON     213 (POOR)
JOHN DAY      427 (FAIR)
LA GRANDE     307 (FAIR)
MADRAS        470 (FAIR)
MEACHAM       301 (FAIR)
PENDLETON     311 (FAIR)
REDMOND       412 (FAIR)
SENECA        426 (FAIR)
THE DALLES    457 (FAIR)

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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