269
FNUS76 KPDT 181228
FWSPDT

Spot Forecast for Paradise Fire...USDA/Forest Service
National Weather Service Pendleton OR
528 AM PDT Fri Sep 18 2026

Forecast is based on forecast start time of 0600 PDT on September 18.
***Thunderstorms imply gusty and erratic winds      ***
***Winds are 20 foot 10-minute averages             ***
***CWR: Chance of wetting rain 0.10 or greater      ***
***Ventilation Index is derived from transport wind
   multiplied by the mixing height in 100`s of ft.
   Categories are a generalized indicator only:
   low (< 200), moderate (200-500), high (500-700),
   and very high (> 700).                           ***

If you have questions or concerns with this forecast, please
contact our office at (541) 276-8134.

.DISCUSSION...Light and variable winds prevail through the forecast
period. Minimum relative humidities will drop in the 50 to 60 percent
range, with good to excellent overnight recoveries in the 70 to 80
percent range. Dry conditions prevail with no rain expected.

.TODAY...

Sky/weather.........Mostly sunny (25-35 percent). Slight chance of
                    rain showers late in the afternoon.
CWR.................3 percent.
Chance of lightning.11 percent.
Max temperature.....59-64.
Min humidity........60-65 percent.
Wind (20 ft)........South 5 to 10 mph. Shifting to the west by 10 AM.
Ridgetop wind.......South 7 to 12 mph. Shifting to the west by 10 AM.
Mixing height.......2900 ft AGL early in the morning.
Transport winds.....Southwest 5 to 10 mph early in the morning
                    becoming light, then becoming west 5 to 10 mph
                    late in the morning.
Ventilation Index...Low (30) increasing to low (130-140) in the
                    afternoon.

TIME (PDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Chc of ltng (%).10  10  0   0   0   10  10  10  10  10  10  10
Temp............48  47  49  51  54  57  58  60  58  58  59  58
RH..............78  79  79  78  71  66  65  65  66  67  65  65
20 FT wind dir..SW  S   S   SW  W   W   W   NW  W   W   NW  NW
20 FT wind spd..4   4   5   5   5   5   5   6   6   6   6   5
20 FT wind gust.6   6   6   6   6   6   6       7   7   7   7

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of lightning.5 percent.
Min temperature.....40-45.
Max humidity........75-80 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Light winds.
Mixing height.......500 ft AGL in the evening.
Transport winds.....Northwest 3 to 8 mph early in the evening
                    becoming light, then becoming west 5 to 10 mph
                    overnight shifting to the northeast.
Ventilation Index...Low (30-40) decreasing to low (30) overnight.

.SATURDAY...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of lightning.0 percent.
Max temperature.....62-67.
Min humidity........45-50 percent.
Wind (20 ft)........Light winds becoming northwest 5 to 10 mph by
                    11 AM.
Ridgetop wind.......Light winds becoming northwest 7 to 12 mph by
                    11 AM.
Mixing height.......4200 ft AGL early in the morning.
Transport winds.....Northeast around 5 mph early in the morning
                    becoming light, then becoming north 5 to 10 mph
                    late in the morning.
Ventilation Index...Low (30) increasing to moderate (230-260) in
                    the afternoon.

$$
Forecaster...Day
Requested by...Derek Dietz
Type of request...WILDFIRE
.TAG 2622100.0/PDT
.DELDT 09/18/26
.FormatterVersion 2.0.0
.EMAIL derek.dietz@usda.gov