243
AUUS46 KPDT 221225
DDOPDT
DAILY DISPERSION OUTLOOK
NATIONAL WEATHER SERVICE PENDLETON OR
525 AM PDT WED JUL 22 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 2-6 MPH. N 4-8 MPH.
TRANSPORT WINDS S 3-6 MPH. NW 5-7 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU JUL 23 GOOD.
OUTLOOK FOR FRI JUL 24 FAIR.
VENTILATION INDEX (CATEGORY) 29 (POOR). 276 (POOR).
OUTLOOK FOR THU JUL 23 541 (FAIR).
OUTLOOK FOR FRI JUL 24 442 (FAIR).
FOR THE UPPER YAKIMA VALLEY INCLUDING YAKIMA...UNION GAP...
SELAH...AND NACHES AREA
7:00 AM AFTERNOON
SURFACE WINDS NW 1-4 MPH. SE 3-7 MPH.
TRANSPORT WINDS NW 4-8 MPH. SW 4-7 MPH.
MIXING HEIGHT NEAR SURFACE. 9500 FT MSL.
DISPERSION CATEGORY POOR. POOR.
OUTLOOK FOR THU JUL 23 FAIR.
OUTLOOK FOR FRI JUL 24 FAIR.
VENTILATION INDEX (CATEGORY) 36 (POOR). 298 (POOR).
OUTLOOK FOR THU JUL 23 486 (FAIR).
OUTLOOK FOR FRI JUL 24 440 (FAIR).
FOR THE GRANDE RONDE RIVER VALLEY
7:00 AM AFTERNOON
SURFACE WINDS N 0-2 MPH. N 4-8 MPH.
TRANSPORT WINDS N 4-5 MPH. N 7-9 MPH.
MIXING HEIGHT NEAR SURFACE. 10000 FT MSL.
DISPERSION CATEGORY POOR. GOOD.
OUTLOOK FOR THU JUL 23 FAIR.
OUTLOOK FOR FRI JUL 24 GOOD.
VENTILATION INDEX (CATEGORY) 47 (POOR). 430 (FAIR).
OUTLOOK FOR THU JUL 23 361 (FAIR).
OUTLOOK FOR FRI JUL 24 398 (FAIR).
FOR THE BASE OF THE NORTHERN BLUE MOUNTAINS
7:00 AM AFTERNOON
SURFACE WINDS SE 2-6 MPH. N 5-9 MPH.
TRANSPORT WINDS SE 5-6 MPH. NW 6-8 MPH.
MIXING HEIGHT NEAR SURFACE. 7500 FT MSL.
DISPERSION CATEGORY POOR. FAIR.
OUTLOOK FOR THU JUL 23 FAIR.
OUTLOOK FOR FRI JUL 24 FAIR.
VENTILATION INDEX (CATEGORY) 30 (POOR). 345 (FAIR).
OUTLOOK FOR THU JUL 23 487 (FAIR).
OUTLOOK FOR FRI JUL 24 391 (FAIR).
SELECT AFTERNOON FORECAST VENTILATION INDICES FOR SOME CITIES
CLE ELUM 464 (FAIR)
ELLENSBURG 435 (FAIR)
GOLDENDALE 298 (POOR)
TRI-CITIES 221 (POOR)
WALLA WALLA 296 (POOR)
YAKIMA 372 (FAIR)
BEND 202 (POOR)
PRINEVILLE 398 (FAIR)
ENTERPRISE 417 (FAIR)
HERMISTON 201 (POOR)
JOHN DAY 406 (FAIR)
LA GRANDE 435 (FAIR)
MADRAS 375 (FAIR)
MEACHAM 299 (POOR)
PENDLETON 278 (POOR)
REDMOND 229 (POOR)
SENECA 278 (POOR)
THE DALLES 112 (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.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page