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000
AUUS46 KPDT 241208
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
508 AM PDT MON MAY 24 2021

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 17-23 MPH.       SW 19-23 MPH.
TRANSPORT WINDS               SW 20-26 MPH.       W 23-26 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           GOOD.               GOOD.
OUTLOOK FOR TUE MAY 25        GOOD.

VENTILATION INDEX (CATEGORY)  323 (FAIR).         1047 (GOOD).
OUTLOOK FOR TUE MAY 25        860 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 7-14 MPH.         W 14-19 MPH.
TRANSPORT WINDS               W 9-16 MPH.         W 18-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR TUE MAY 25        FAIR.

VENTILATION INDEX (CATEGORY)  180 (POOR).         1010 (GOOD).
OUTLOOK FOR TUE MAY 25        463 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS   E-NE 7-9 MPH.       W 7-8 MPH.
TRANSPORT WINDS               E-NE 7-13 MPH.      W 11-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR TUE MAY 25        POOR.

VENTILATION INDEX (CATEGORY)  106 (POOR).         363 (FAIR).
OUTLOOK FOR TUE MAY 25        189 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      468 (FAIR)
ELLENSBURG    847 (GOOD)
GOLDENDALE    699 (GOOD)
TRI-CITIES   1050 (GOOD)
WALLA WALLA  1033 (GOOD)
YAKIMA        920 (GOOD)
BEND          709 (GOOD)
PRINEVILLE    477 (FAIR)
ENTERPRISE    458 (FAIR)
HERMISTON    1050 (GOOD)
JOHN DAY      470 (FAIR)
LA GRANDE     481 (FAIR)
MADRAS        666 (GOOD)
MEACHAM       572 (FAIR)
PENDLETON    1050 (GOOD)
REDMOND       487 (FAIR)
SENECA        570 (FAIR)
THE DALLES    480 (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.
$$