Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 210937
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
237 AM PDT MON AUG 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                 SE 3-7 MPH.         N 3-7 MPH.
TRANSPORT WINDS               SE 3-7 MPH.         SW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE AUG 22        POOR.

VENTILATION INDEX (CATEGORY)  26 (POOR).          167 (POOR).
OUTLOOK FOR TUE AUG 22        108 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 4-9 MPH.         E 3-7 MPH.
TRANSPORT WINDS               NW 4-9 MPH.         SW 5-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE AUG 22        FAIR.

VENTILATION INDEX (CATEGORY)  27 (POOR).          102 (POOR).
OUTLOOK FOR TUE AUG 22        273 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-6 MPH.         N 5-10 MPH.
TRANSPORT WINDS               NE 2-6 MPH.         W 10-15 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR TUE AUG 22        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          280 (POOR).
OUTLOOK FOR TUE AUG 22        635 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      180 (POOR)
ELLENSBURG    281 (POOR)
GOLDENDALE    193 (POOR)
TRI-CITIES    143 (POOR)
WALLA WALLA   174 (POOR)
YAKIMA        177 (POOR)
BEND           95 (POOR)
PRINEVILLE     92 (POOR)
ENTERPRISE    250 (POOR)
HERMISTON     146 (POOR)
JOHN DAY      155 (POOR)
LA GRANDE     285 (POOR)
MADRAS        124 (POOR)
MEACHAM       178 (POOR)
PENDLETON     162 (POOR)
REDMOND        31 (POOR)
SENECA        190 (POOR)
THE DALLES    194 (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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