Text Products for DDO Issued by PDT

Daily Dispersion Outlook
Issued by NWS Pendleton, OR
Versions: 1 2 3 4 5 6 7

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AUUS46 KPDT 251223
DDOPDT

DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
523 AM PDT THU APR 25 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 10-18 MPH.
TRANSPORT WINDS               SW 6-12 MPH.        SW 12-20 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 26        GOOD.
OUTLOOK FOR SAT APR 27        GOOD.

VENTILATION INDEX (CATEGORY)  102 (POOR).         616 (GOOD).
OUTLOOK FOR FRI APR 26        726 (GOOD).
OUTLOOK FOR SAT APR 27        881 (GOOD).

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

                              7:00 AM             AFTERNOON
SURFACE WINDS                 S 3-7 MPH.          SW 12-20 MPH.
TRANSPORT WINDS               S 3-7 MPH.          SW 15-25 MPH.
MIXING HEIGHT                 NEAR SURFACE.       5000 FT MSL.
DISPERSION CATEGORY           POOR.               GOOD.
OUTLOOK FOR FRI APR 26        GOOD.
OUTLOOK FOR SAT APR 27        FAIR.

VENTILATION INDEX (CATEGORY)  28 (POOR).          506 (FAIR).
OUTLOOK FOR FRI APR 26        538 (FAIR).
OUTLOOK FOR SAT APR 27        550 (FAIR).

FOR THE GRANDE RONDE RIVER VALLEY

                              7:00 AM             AFTERNOON
SURFACE WINDS                 NW 2-5 MPH.         NW 4-8 MPH.
TRANSPORT WINDS               W 2-5 MPH.          W 5-9 MPH.
MIXING HEIGHT                 NEAR SURFACE.       8000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 26        FAIR.
OUTLOOK FOR SAT APR 27        FAIR.

VENTILATION INDEX (CATEGORY)  40 (POOR).          274 (POOR).
OUTLOOK FOR FRI APR 26        370 (FAIR).
OUTLOOK FOR SAT APR 27        324 (FAIR).

FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS

                              7:00 AM             AFTERNOON
SURFACE WINDS                 SW 6-12 MPH.        W 5-10 MPH.
TRANSPORT WINDS               SW 7-14 MPH.        SW 6-12 MPH.
MIXING HEIGHT                 NEAR SURFACE.       6000 FT MSL.
DISPERSION CATEGORY           POOR.               FAIR.
OUTLOOK FOR FRI APR 26        FAIR.
OUTLOOK FOR SAT APR 27        FAIR.

VENTILATION INDEX (CATEGORY)  142 (POOR).         491 (FAIR).
OUTLOOK FOR FRI APR 26        480 (FAIR).
OUTLOOK FOR SAT APR 27        631 (GOOD).

SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM      191 (POOR)
ELLENSBURG    222 (POOR)
GOLDENDALE    166 (POOR)
TRI-CITIES    697 (GOOD)
WALLA WALLA   526 (FAIR)
YAKIMA        421 (FAIR)
BEND          673 (GOOD)
PRINEVILLE    484 (FAIR)
ENTERPRISE    289 (POOR)
HERMISTON     571 (FAIR)
JOHN DAY      473 (FAIR)
LA GRANDE     328 (FAIR)
MADRAS        513 (FAIR)
MEACHAM       362 (FAIR)
PENDLETON     470 (FAIR)
REDMOND       437 (FAIR)
SENECA        611 (GOOD)
THE DALLES     66 (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.
$$
National Weather Service Weather Forecast Office
