Daily Dispersion Outlook
Issued by NWS Pendleton, OR

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000
AUUS46 KPDT 231332
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
532 AM PST FRI FEB 23 2018

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S-SE 4-10 MPH.      SW 8-15 MPH.
TRANSPORT WINDS               S-SE 4-10 MPH.      SW 14-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 24        GOOD.

VENTILATION INDEX (CATEGORY)  33 (POOR).          629 (GOOD).
OUTLOOK FOR SAT FEB 24        1041 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W-NW 3-7 MPH.       S-SW 4-11 MPH.
TRANSPORT WINDS               W-NW 3-7 MPH.       SW 7-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 24        GOOD.

VENTILATION INDEX (CATEGORY)  25 (POOR).          220 (POOR).
OUTLOOK FOR SAT FEB 24        1050 (GOOD).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-7 MPH.         S 4-8 MPH.
TRANSPORT WINDS               NW 2-7 MPH.         SW 6-10 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SAT FEB 24        GOOD.

VENTILATION INDEX (CATEGORY)  27 (POOR).          175 (POOR).
OUTLOOK FOR SAT FEB 24        1050 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      267 (POOR)
ELLENSBURG    293 (POOR)
GOLDENDALE    241 (POOR)
TRI-CITIES    636 (GOOD)
WALLA WALLA   602 (GOOD)
YAKIMA        103 (POOR)
BEND          183 (POOR)
PRINEVILLE    183 (POOR)
ENTERPRISE    154 (POOR)
HERMISTON     675 (GOOD)
JOHN DAY      165 (POOR)
LA GRANDE     184 (POOR)
MADRAS        311 (FAIR)
MEACHAM       302 (FAIR)
PENDLETON     512 (FAIR)
REDMOND       193 (POOR)
SENECA        173 (POOR)
THE DALLES    163 (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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