315
AUUS46 KPDT 021121
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
421 AM PDT THU MAY 2 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 2-5 MPH.         NW 4-8 MPH.
TRANSPORT WINDS               S 2-6 MPH.          NE 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.
OUTLOOK FOR SAT MAY 4         FAIR.

VENTILATION INDEX (CATEGORY)  25 (POOR).          447 (FAIR).
OUTLOOK FOR FRI MAY 3         697 (GOOD).
OUTLOOK FOR SAT MAY 4         242 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 2-5 MPH.          SE 3-6 MPH.
TRANSPORT WINDS               NW 3-6 MPH.         NE 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       9000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.
OUTLOOK FOR SAT MAY 4         FAIR.

VENTILATION INDEX (CATEGORY)  33 (POOR).          530 (FAIR).
OUTLOOK FOR FRI MAY 3         943 (GOOD).
OUTLOOK FOR SAT MAY 4         225 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NE 2-4 MPH.         N 5-6 MPH.
TRANSPORT WINDS               E 3-6 MPH.          NE 6-8 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.
OUTLOOK FOR SAT MAY 4         GOOD.

VENTILATION INDEX (CATEGORY)  65 (POOR).          218 (POOR).
OUTLOOK FOR FRI MAY 3         810 (GOOD).
OUTLOOK FOR SAT MAY 4         1018 (GOOD).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SE 3-6 MPH.         N 5-8 MPH.
TRANSPORT WINDS               SE 5-9 MPH.         NE 7-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI MAY 3         GOOD.
OUTLOOK FOR SAT MAY 4         FAIR.

VENTILATION INDEX (CATEGORY)  39 (POOR).          379 (FAIR).
OUTLOOK FOR FRI MAY 3         664 (GOOD).
OUTLOOK FOR SAT MAY 4         382 (FAIR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      633 (GOOD)
ELLENSBURG    652 (GOOD)
GOLDENDALE    328 (FAIR)
TRI-CITIES    515 (FAIR)
WALLA WALLA   454 (FAIR)
YAKIMA        671 (GOOD)
BEND          319 (FAIR)
PRINEVILLE    284 (POOR)
ENTERPRISE    332 (FAIR)
HERMISTON     401 (FAIR)
JOHN DAY      213 (POOR)
LA GRANDE     244 (POOR)
MADRAS        254 (POOR)
MEACHAM       291 (POOR)
PENDLETON     323 (FAIR)
REDMOND       251 (POOR)
SENECA        278 (POOR)
THE DALLES    262 (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.
$$