Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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538
AUUS46 KPDT 261207
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
507 AM PDT WED JUL 26 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-S 3-9 MPH.       W-NW 4-7 MPH.
TRANSPORT WINDS               SE-S 3-9 MPH.       SW 7-11 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR THU JUL 27        GOOD.

VENTILATION INDEX (CATEGORY)  60 (POOR).          457 (FAIR).
OUTLOOK FOR THU JUL 27        662 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 4-8 MPH.       SW 4-9 MPH.
TRANSPORT WINDS               W-NW 4-8 MPH.       SW 8-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU JUL 27        FAIR.

VENTILATION INDEX (CATEGORY)  52 (POOR).          594 (FAIR).
OUTLOOK FOR THU JUL 27        331 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E-SE 0-3 MPH.       NW-N 3-6 MPH.
TRANSPORT WINDS               E-SE 0-3 MPH.       W 6-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       13500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR THU JUL 27        FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          375 (FAIR).
OUTLOOK FOR THU JUL 27        286 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      357 (FAIR)
ELLENSBURG    558 (FAIR)
GOLDENDALE    530 (FAIR)
TRI-CITIES    549 (FAIR)
WALLA WALLA   370 (FAIR)
YAKIMA        528 (FAIR)
BEND          291 (POOR)
PRINEVILLE    409 (FAIR)
ENTERPRISE    180 (POOR)
HERMISTON     528 (FAIR)
JOHN DAY      292 (POOR)
LA GRANDE     374 (FAIR)
MADRAS        329 (FAIR)
MEACHAM       283 (POOR)
PENDLETON     296 (POOR)
REDMOND       424 (FAIR)
SENECA        139 (POOR)
THE DALLES    546 (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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