NOAA

National Weather Service Weather Forecast Office

Des Moines, IA

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

Daily Dispersion Outlook
Issued by NWS Pendleton, OR

000
AUUS46 KPDT 211045
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
345 AM PDT SUN APR 21 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 13-23 MPH.       W 10-13 MPH.
TRANSPORT WINDS               SW 13-23 MPH.       W 10-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           FAIR.               FAIR.
OUTLOOK FOR MON APR 22        FAIR.
OUTLOOK FOR TUE APR 23        FAIR.

VENTILATION INDEX (CATEGORY)  275 (POOR).         689 (GOOD).
OUTLOOK FOR MON APR 22        265 (POOR).
OUTLOOK FOR TUE APR 23        160 (POOR).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 W 8-12 MPH.         W 9-12 MPH.
TRANSPORT WINDS               W 8-12 MPH.         W 10-13 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON APR 22        FAIR.
OUTLOOK FOR TUE APR 23        FAIR.

VENTILATION INDEX (CATEGORY)  178 (POOR).         664 (GOOD).
OUTLOOK FOR MON APR 22        227 (POOR).
OUTLOOK FOR TUE APR 23        170 (POOR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 7-11 MPH.        NW 9-13 MPH.
TRANSPORT WINDS               NW 10-14 MPH.       NW 11-15 MPH.
MIXING HEIGHT                 4500 FT MSL.        7500 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR MON APR 22        FAIR.
OUTLOOK FOR TUE APR 23        FAIR.

VENTILATION INDEX (CATEGORY)  255 (POOR).         554 (FAIR).
OUTLOOK FOR MON APR 22        203 (POOR).
OUTLOOK FOR TUE APR 23        415 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 13-21 MPH.       W 9-12 MPH.
TRANSPORT WINDS               SW 13-21 MPH.       W 10-17 MPH.
MIXING HEIGHT                 NEAR SURFACE.       7000 FT MSL.
DISPERSION CATEGORY           FAIR.               GOOD.
OUTLOOK FOR MON APR 22        FAIR.
OUTLOOK FOR TUE APR 23        FAIR.

VENTILATION INDEX (CATEGORY)  296 (POOR).         639 (GOOD).
OUTLOOK FOR MON APR 22        203 (POOR).
OUTLOOK FOR TUE APR 23        104 (POOR).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      951 (GOOD)
ELLENSBURG   1050 (GOOD)
GOLDENDALE    811 (GOOD)
TRI-CITIES    790 (GOOD)
WALLA WALLA   631 (GOOD)
YAKIMA        789 (GOOD)
BEND          251 (POOR)
PRINEVILLE    326 (FAIR)
ENTERPRISE    498 (FAIR)
HERMISTON     664 (GOOD)
JOHN DAY      472 (FAIR)
LA GRANDE     634 (GOOD)
MADRAS        313 (FAIR)
MEACHAM       546 (FAIR)
PENDLETON     601 (GOOD)
REDMOND       277 (POOR)
SENECA        497 (FAIR)
THE DALLES    846 (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.
$$