Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 211205
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
505 AM PDT TUE MAY 21 2019

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 4-8 MPH.         W 5-10 MPH.
TRANSPORT WINDS               SW 8-12 MPH.        SW 8-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  143 (POOR).         421 (FAIR).
OUTLOOK FOR WED MAY 22        926 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-6 MPH.          N 5-0 MPH.
TRANSPORT WINDS               W 5-9 MPH.          N 8-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  107 (POOR).         521 (FAIR).
OUTLOOK FOR WED MAY 22        1049 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-4 MPH.          NW 5-9 MPH.
TRANSPORT WINDS               W 3-6 MPH.          NW 8-12 MPH.
MIXING HEIGHT                 4000 FT MSL.        6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR WED MAY 22        GOOD.

VENTILATION INDEX (CATEGORY)  83 (POOR).          338 (FAIR).
OUTLOOK FOR WED MAY 22        794 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      643 (GOOD)
ELLENSBURG    888 (GOOD)
GOLDENDALE    388 (FAIR)
TRI-CITIES    362 (FAIR)
WALLA WALLA   367 (FAIR)
YAKIMA        746 (GOOD)
BEND          512 (FAIR)
PRINEVILLE    511 (FAIR)
ENTERPRISE    268 (POOR)
HERMISTON     471 (FAIR)
JOHN DAY      474 (FAIR)
LA GRANDE     351 (FAIR)
MADRAS        506 (FAIR)
MEACHAM       324 (FAIR)
PENDLETON     442 (FAIR)
REDMOND       494 (FAIR)
SENECA        479 (FAIR)
THE DALLES    554 (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/GFORECAST/GINDEX.PHP?FCST=MIXHGT,VENTCAT,TRANSWIND,VENTINDX&VT=0,72

IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
$$


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