FNUS76 KPQR 202252
FWSPQR

SPOT FORECAST FOR TUMBLEBUG...USFS WNF
NATIONAL WEATHER SERVICE PORTLAND OR
352 PM PDT SUN SEP 20 2009

FORECAST IS BASED ON REQUEST TIME OF 1512 PDT ON SEPTEMBER 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...RED FLAG WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO NOON PDT
TUESDAY...

.DISCUSSION...
HIGH PRESSURE WILL SIT OVER THE REGION FOR THE NEXT SEVERAL DAYS.
MEANWHILE...THERMAL LOW PRESSURE OVER SW OREGON WILL BUILD
STRONGLY ALONG THE OREGON/WASHINGTON COAST TONIGHT AND MONDAY.
THIS WILL BRING VERY WARM AND DRY OFFSHORE FLOW...WITH INCREASING
EAST WINDS TO THE DISTRICT TONIGHT. WINDS WILL BE STRONGEST DURING
THE LATE NIGHT AND MORNING HOURS. EXPECT LOW AFTERNOON HUMIDITY AND
POOR OVERNIGHT RH RECOVERIES ON RIDGE TOPS AND MID SLOPES.

CONDITIONS WILL IMPROVE SLOWLY ON TUESDAY AFTERNOON AS THE THERMAL
TROUGH BEGINS TO WEAKEN...BUT WARM AND DRY CONDITIONS WILL CONTINUE.
THE THERMAL TROUGH WILL SHIFT OVER THE CASCADES WEDNESDAY AFTERNOON.

ON THURSDAY...A MARINE PUSH WILL BRING SHORT-LIVED COOLER/HIGHER
RH TO THE REGION. HOWEVER...WARM AND DRY WEATHER MAY DEVELOP
AGAIN NEXT WEEKEND. FCSTR...COLLINS.


CHANCE OF WETTING RAIN (CWR) 0.25 INCHES OR GREATER.
FORECAST WINDS ARE 10 MINUTE AVERAGES 20 FT ABOVE VEGETATION.
THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS.


.TODAY...

SKY/WEATHER.........SUNNY.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....84-87.
MIN HUMIDITY........VERY LOW. 8-10 PERCENT.
HAINES INDEX........5 (HIGH).
WIND (20 FT)........EAST 10 TO 14 MPH...WITH GUSTS OF 20-30 MPH.
                      STRONGEST WINDS ON RIDGES AND EAST WIND
                      EXPOSED LOCATIONS.

TIME (PDT)         7 AM    9 AM    11 AM     1 PM     3 PM    5 PM
CLOUDCOVER......    0%      0%       0%       0%       0%       0%
TEMP............   71      77       81       83       85       86
RH..............   21%     13%      11%      10%       9%       9%
20 FT WIND......  E 8-10  E 9-11   E 9-12   E 9-12   E 8-13   E 9-13
   MAX GUST.....   15-20   15-20    16-22    17-22    15-22    17-22

.TONIGHT...

SKY/WEATHER.........CLEAR.
CWR (%).............0 PERCENT.
MIN TEMPERATURE.....54-61...WARMEST ALONG RIDGES.
MAX HUMIDITY........22-32 PERCENT...LOWEST ALONG RIDGES.
WIND (20 FT)........EAST 9 TO 13 MPH...WITH GUSTS OF 18-30 MPH. WIND
                    EASING TO 3 TO 7 MPH AFTER MIDNIGHT IN SHELTERED
                    LOCATIONS. STRONGEST WINDS ON RIDGES AND EAST WIND
                    EXPOSED LOCATIONS.
HAINES INDEX........5 (MODERATE).

TIME (PDT)         6 PM    8 PM    10 PM   MIDNGT  2 AM    4 AM
CLOUD COVER.....    0%      0%      0%      0%      0%      0%
TEMP............   84      75      68      66      65      63
RH..............   10      13      15      17     19-25   20-30
20 FT WIND......  E 8-12  E 7-10  E 6-10  E 5-10  E 3-10  E 3-10
   MAX GUST.....   15-20   12-18   10-18   10-18   8-18    8-18


.TUESDAY...

SKY/WEATHER.........SUNNY.
CWR (%).............0 PERCENT.
MAX TEMPERATURE.....90-93.
MIN HUMIDITY........8-14 PERCENT.
WIND (20 FT)........EAST 3 TO 7 MPH..EASING IN THE AFTERNOON.
HAINES INDEX........5 (MODERATE).

$$
FORECASTER...COLLINS
REQUESTED BY...JOHN HECKMAN
REASON FOR REQUEST...WILDFIRE
.TAG 20090920.TUMBL.02/PQR