AUUS46 KPDT 041149
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
449 AM PDT SAT MAY 4 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 10-20 MPH.       S 6-12 MPH.
TRANSPORT WINDS               SE 12-25 MPH.       S 10-16 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5500 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR SUN MAY 5         GOOD.               
OUTLOOK FOR MON MAY 6         GOOD.               

VENTILATION INDEX (CATEGORY)  77 (POOR).          465 (FAIR).
OUTLOOK FOR SUN MAY 5         703 (GOOD).         
OUTLOOK FOR MON MAY 6         1007 (GOOD).        

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-7 MPH.         W 5-10 MPH.
TRANSPORT WINDS               NE 5-10 MPH.        SE 8-14 MPH.
MIXING HEIGHT                 NEAR SURFACE.       4500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR SUN MAY 5         FAIR.               
OUTLOOK FOR MON MAY 6         GOOD.               

VENTILATION INDEX (CATEGORY)  55 (POOR).          388 (FAIR).
OUTLOOK FOR SUN MAY 5         437 (FAIR).         
OUTLOOK FOR MON MAY 6         1042 (GOOD).        

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 8-15 MPH.        S 13-22 MPH.
TRANSPORT WINDS               SE 12-25 MPH.       S 20-29 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR SUN MAY 5         GOOD.               
OUTLOOK FOR MON MAY 6         GOOD.               

VENTILATION INDEX (CATEGORY)  150 (POOR).         1023 (GOOD).
OUTLOOK FOR SUN MAY 5         484 (FAIR).         
OUTLOOK FOR MON MAY 6         455 (FAIR).         

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 15-25 MPH.       SE 10-15 MPH.
TRANSPORT WINDS               SE 18-33 MPH.       S 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           GOOD.               FAIR.
OUTLOOK FOR SUN MAY 5         GOOD.               
OUTLOOK FOR MON MAY 6         GOOD.               

VENTILATION INDEX (CATEGORY)  123 (POOR).         635 (GOOD).
OUTLOOK FOR SUN MAY 5         602 (GOOD).         
OUTLOOK FOR MON MAY 6         713 (GOOD).         

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      499 (FAIR)
ELLENSBURG    384 (FAIR)
GOLDENDALE     65 (POOR)
TRI-CITIES    664 (GOOD)
WALLA WALLA   367 (FAIR)
YAKIMA        324 (FAIR)
BEND          252 (POOR)
PRINEVILLE    233 (POOR)
ENTERPRISE   1040 (GOOD)
HERMISTON     250 (POOR)
JOHN DAY     1050 (GOOD)
LA GRANDE    1050 (GOOD)
MADRAS        258 (POOR)
MEACHAM      1050 (GOOD)
PENDLETON     552 (FAIR)
REDMOND       354 (FAIR)
SENECA        861 (GOOD)
THE DALLES    170 (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/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.
$$