025
AUUS46 KPDT 041137
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
437 AM PDT THU JUL 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                 S 3-8 MPH.          NW 4-7 MPH.
TRANSPORT WINDS               SW 3-8 MPH.         NW 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7500 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JUL 5         FAIR.
OUTLOOK FOR SAT JUL 6         FAIR.

VENTILATION INDEX (CATEGORY)  55 (POOR).          256 (POOR).
OUTLOOK FOR FRI JUL 5         245 (POOR).
OUTLOOK FOR SAT JUL 6         423 (FAIR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 3-8 MPH.         SE 2-5 MPH.
TRANSPORT WINDS               NW 3-8 MPH.         W 4-7 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               POOR.
OUTLOOK FOR FRI JUL 5         FAIR.
OUTLOOK FOR SAT JUL 6         FAIR.

VENTILATION INDEX (CATEGORY)  61 (POOR).          159 (POOR).
OUTLOOK FOR FRI JUL 5         177 (POOR).
OUTLOOK FOR SAT JUL 6         385 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 E 1-3 MPH.          N 5-7 MPH.
TRANSPORT WINDS               N 3-4 MPH.          NW 7-9 MPH.
MIXING HEIGHT                 4000 FT MSL.        10000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI JUL 5         GOOD.
OUTLOOK FOR SAT JUL 6         GOOD.

VENTILATION INDEX (CATEGORY)  35 (POOR).          291 (POOR).
OUTLOOK FOR FRI JUL 5         298 (POOR).
OUTLOOK FOR SAT JUL 6         656 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 4-8 MPH.          NW 5-7 MPH.
TRANSPORT WINDS               S 5-9 MPH.          NW 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI JUL 5         FAIR.
OUTLOOK FOR SAT JUL 6         FAIR.

VENTILATION INDEX (CATEGORY)  68 (POOR).          281 (POOR).
OUTLOOK FOR FRI JUL 5         270 (POOR).
OUTLOOK FOR SAT JUL 6         482 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      177 (POOR)
ELLENSBURG    115 (POOR)
GOLDENDALE    219 (POOR)
TRI-CITIES    213 (POOR)
WALLA WALLA   214 (POOR)
YAKIMA         91 (POOR)
BEND          116 (POOR)
PRINEVILLE    137 (POOR)
ENTERPRISE    433 (FAIR)
HERMISTON     196 (POOR)
JOHN DAY      432 (FAIR)
LA GRANDE     271 (POOR)
MADRAS        140 (POOR)
MEACHAM       212 (POOR)
PENDLETON     277 (POOR)
REDMOND       141 (POOR)
SENECA        537 (FAIR)
THE DALLES     75 (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.
$$