217
AUUS46 KPDT 181200
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
500 AM PDT SAT MAY 18 2024

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

FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        W 12-22 MPH.
TRANSPORT WINDS               SW 7-12 MPH.        W 17-23 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 19        FAIR.
OUTLOOK FOR MON MAY 20        FAIR.

VENTILATION INDEX (CATEGORY)  122 (POOR).         954 (GOOD).
OUTLOOK FOR SUN MAY 19        721 (GOOD).
OUTLOOK FOR MON MAY 20        510 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 3-7 MPH.          NW 12-18 MPH.
TRANSPORT WINDS               NW 3-7 MPH.         NW 16-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 19        FAIR.
OUTLOOK FOR MON MAY 20        FAIR.

VENTILATION INDEX (CATEGORY)  67 (POOR).          848 (GOOD).
OUTLOOK FOR SUN MAY 19        553 (FAIR).
OUTLOOK FOR MON MAY 20        357 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 2-4 MPH.         NW 12-20 MPH.
TRANSPORT WINDS               W 3-7 MPH.          NW 15-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       11000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 19        GOOD.
OUTLOOK FOR MON MAY 20        GOOD.

VENTILATION INDEX (CATEGORY)  79 (POOR).          910 (GOOD).
OUTLOOK FOR SUN MAY 19        599 (FAIR).
OUTLOOK FOR MON MAY 20        812 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        W 15-20 MPH.
TRANSPORT WINDS               SW 7-14 MPH.        W 16-22 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR SUN MAY 19        FAIR.
OUTLOOK FOR MON MAY 20        FAIR.

VENTILATION INDEX (CATEGORY)  153 (POOR).         935 (GOOD).
OUTLOOK FOR SUN MAY 19        677 (GOOD).
OUTLOOK FOR MON MAY 20        471 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      975 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE    952 (GOOD)
TRI-CITIES    846 (GOOD)
WALLA WALLA   922 (GOOD)
YAKIMA        853 (GOOD)
BEND          716 (GOOD)
PRINEVILLE    825 (GOOD)
ENTERPRISE    989 (GOOD)
HERMISTON    1050 (GOOD)
JOHN DAY      878 (GOOD)
LA GRANDE     983 (GOOD)
MADRAS        657 (GOOD)
MEACHAM       862 (GOOD)
PENDLETON    1041 (GOOD)
REDMOND       826 (GOOD)
SENECA       1049 (GOOD)
THE DALLES   1023 (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/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.
$$