FNUS76 KPQR 030229
FWSPQR

SPOT FORECAST FOR OPAL LAKE...USFS WNF
NATIONAL WEATHER SERVICE PORTLAND OR
729 PM PDT FRI AUG 2 2013

FORECAST IS BASED ON REQUEST TIME OF 1748 PDT ON AUGUST 02.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...BECOMING INCREASINGLY WARM...DRY...AND UNSTABLE THIS WEEKEND...

.DISCUSSION...THE UPPER LEVEL LOW PRESSURE SYSTEM RESPONSIBLE FOR
THE UNSEASONABLY COOL AND MOIST WEATHER THE PAST COUPLE DAYS IS
WEAKENING. MEANWHILE AN UPPER LEVEL RIDGE IS STRENGTHENING OVER
THE GREAT BASIN...ENHANCING A THERMAL TROUGH OF LOW PRESSURE OVER
CALIFORNIA AND NEVADA. THIS THERMAL TROUGH WILL BUILD NORTH INTO
THE CASCADES AND EASTERN OREGON BY SUNDAY...RESULTING IN AN
INCREASINGLY WARMER...DRIER...AND UNSTABLE AIR MASS FOR THE FIRE
AREA THIS WEEKEND. MID-LEVEL HAINES INDICES WILL APPROACH 6 BY
SUNDAY...AND SHOULD BE AT LEAST 5 DUE TO THE INSTABILITY. A STRAY
THUNDERSTORM IS POSSIBLE EACH AFTERNOON...WITH A BETTER CHANCE ON
SUNDAY.


.SATURDAY...

SKY/WEATHER.........MOSTLY SUNNY...A FEW CUMULUS BUILDUPS IN
                    THE AFTERNOON.
CWR (%).............2 PERCENT.
MAX TEMPERATURE.....72-75.
MIN HUMIDITY........25-30 PERCENT.
WIND (20 FT)........CALM EARLY IN THE MORNING...BECOMING
                    INCREASINGLY UPSLOPE 4 TO 7 MPH BY 1000.
                    WIND BECOMING WEST 5 TO 10 MPH BY 1500 WITH
                    GUSTS TO 20 MPH...ESPECIALLY NEAR THE MIDDLE
                    FORK CANYON.
INVERSIONS..........ONLY NEAR OPAL LAKE...SHALLOW AND BREAKING
                    BY 0930.

TIME (PDT)      6 AM   8 AM   10 AM   NOON   2 PM   4 PM
TEMP............38     48     60      70     73     74
RH..............95     82     55      37     33     27
20 FT WIND......CALM   CALM   UP 4    UP 5   UP/W 7 W 7
   MAX GUST.....              10      12     20     20


.SATURDAY NIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR (%).............2 PERCENT.
MIN TEMPERATURE.....AROUND 45.
MAX HUMIDITY........65-75 PERCENT...EXCEPT UP TO 95 PERCENT ALONG
                    OPAL LAKE.
WIND (20 FT)........WEST 3 TO 6 MPH WITH EARLY EVENING GUSTS TO
                    15 MPH...BECOMING DRAINAGE 0 TO 3 MPH BY 2200.


.SUNDAY...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF THUNDERSTORMS
                    IN THE AFTERNOON.
CWR (%).............7 PERCENT.
MAX TEMPERATURE.....77-80.
MIN HUMIDITY........20-25 PERCENT.
WIND (20 FT)........NORTH 1 TO 3 MPH IN THE MORNING...BECOMING
                    UPSLOPE/UPCANYON 4 TO 7 MPH BY MIDDAY.
                    AFTERNOON GUSTS 15 TO 20 MPH NEAR MIDDLE FORK
                    CANYON.


$$
FORECASTER...WEAGLE
REQUESTED BY...LOVATO
REASON FOR REQUEST...WILDFIRE
.TAG 20130802.OPALL.01/PQR