688
AUUS46 KPDT 181225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT SUN OCT 18 2026
*** AIR DISPERSION CATEGORIES: GOOD, FAIR, POOR ***
FOR THE COLUMBIA BASIN FROM PENDLETON TO WALLA WALLA AND PASCO
7:00 AM AFTERNOON
SURFACE WINDS SE 1-4 MPH. N 5-9 MPH.
TRANSPORT WINDS SW 3-6 MPH. NE 5-9 MPH.
MIXING HEIGHT NEAR SURFACE. 4000 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON OCT 19 POOR.
OUTLOOK FOR TUE OCT 20 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 140 (POOR).
OUTLOOK FOR MON OCT 19 64 (POOR).
OUTLOOK FOR TUE OCT 20 125 (POOR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 0-3 MPH. NE 2-6 MPH.
TRANSPORT WINDS NW 4-8 MPH. E 3-6 MPH.
MIXING HEIGHT NEAR SURFACE. 4500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON OCT 19 POOR.
OUTLOOK FOR TUE OCT 20 FAIR.
VENTILATION INDEX (CATEGORY) 27 (POOR). 102 (POOR).
OUTLOOK FOR MON OCT 19 53 (POOR).
OUTLOOK FOR TUE OCT 20 142 (POOR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 0-2 MPH. NE 0-2 MPH.
TRANSPORT WINDS N 5-6 MPH. S 5-6 MPH.
MIXING HEIGHT NEAR SURFACE. 5500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR MON OCT 19 FAIR.
OUTLOOK FOR TUE OCT 20 FAIR.
VENTILATION INDEX (CATEGORY) 28 (POOR). 77 (POOR).
OUTLOOK FOR MON OCT 19 166 (POOR).
OUTLOOK FOR TUE OCT 20 94 (POOR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS S 0-3 MPH. N 4-8 MPH.
TRANSPORT WINDS S 4-7 MPH. NE 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 3500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR MON OCT 19 POOR.
OUTLOOK FOR TUE OCT 20 POOR.
VENTILATION INDEX (CATEGORY) 25 (POOR). 121 (POOR).
OUTLOOK FOR MON OCT 19 81 (POOR).
OUTLOOK FOR TUE OCT 20 99 (POOR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 196 (POOR)
ELLENSBURG 162 (POOR)
GOLDENDALE 245 (POOR)
TRI-CITIES 143 (POOR)
WALLA WALLA 102 (POOR)
YAKIMA 106 (POOR)
BEND 95 (POOR)
PRINEVILLE 94 (POOR)
ENTERPRISE 123 (POOR)
HERMISTON 166 (POOR)
JOHN DAY 188 (POOR)
LA GRANDE 105 (POOR)
MADRAS 111 (POOR)
MEACHAM 84 (POOR)
PENDLETON 150 (POOR)
REDMOND 41 (POOR)
SENECA 369 (FAIR)
THE DALLES 245 (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:
HTTPS://WWW.WEATHER.GOV/PDT/DSSBRIEFING
IF YOU WOULD LIKE TO KNOW MORE ABOUT THIS PRODUCT...CONTACT THE
NATIONAL WEATHER SERVICE IN PENDLETON.
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