Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 201151
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
451 AM PDT THU JUL 20 2017

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SW 7-15 MPH.      W 11-17 MPH.
TRANSPORT WINDS               S-SW 7-15 MPH.      SW 13-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI JUL 21        FAIR.

VENTILATION INDEX (CATEGORY)  277 (POOR).         1002 (GOOD).
OUTLOOK FOR FRI JUL 21        383 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 5-9 MPH.          W 9-14 MPH.
TRANSPORT WINDS               W 5-9 MPH.          W 11-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI JUL 21        POOR.

VENTILATION INDEX (CATEGORY)  144 (POOR).         724 (GOOD).
OUTLOOK FOR FRI JUL 21        195 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 9-15 MPH.        NW 7-11 MPH.
TRANSPORT WINDS               NW 9-15 MPH.        W-NW 8-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI JUL 21        GOOD.

VENTILATION INDEX (CATEGORY)  79 (POOR).          349 (FAIR).
OUTLOOK FOR FRI JUL 21        227 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      717 (GOOD)
ELLENSBURG   1039 (GOOD)
GOLDENDALE    790 (GOOD)
TRI-CITIES   1048 (GOOD)
WALLA WALLA   973 (GOOD)
YAKIMA        584 (FAIR)
BEND          271 (POOR)
PRINEVILLE    314 (FAIR)
ENTERPRISE    402 (FAIR)
HERMISTON    1050 (GOOD)
JOHN DAY      389 (FAIR)
LA GRANDE     378 (FAIR)
MADRAS        380 (FAIR)
MEACHAM       460 (FAIR)
PENDLETON     844 (GOOD)
REDMOND       311 (FAIR)
SENECA        493 (FAIR)
THE DALLES    988 (GOOD)

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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