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000
FNUS56 KPDT 201552
FWFPDT
FIRE WEATHER FORECAST
NATIONAL WEATHER SERVICE PENDLETON OR
900 AM PDT TUE AUG 20 2002 CLOUTIER
...ISOLATED SHOWERS AND THUNDERSTORMS IN THE MOUNTAINS TODAY AND
WEDNESDAY...
DISCUSSION...AN UPPER LOW PRESSURE SYSTEM WILL MOVE OVER THE
DISTRICT TODAY WITH A MARINE PUSH CAUSING COOLER AND MORE HUMID AIR
TO FILTER EAST OF THE CASCADES. THE ATMOSPHERE WILL BECOME MORE
UNSTABLE THIS AFTERNOON AND WILL CONTINUE THROUGH WEDNESDAY. THIS
WILL RESULT IN SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS...
MAINLY IN THE MOUNTAINS.
***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***
***CWR = CHANCE OF A WETTING RAIN WHICH IS GREATER THAN .10***
***WINDS ARE 20 FOOT/10 MINUTE AVERAGE***
HIGH ELEVATION HAINES INDEX OBSERVED TUESDAY AUG 20...
SALEM...2 MEDFORD...2 SPOKANE..3 BOISE...3
ZONE: 630...CENTRAL MOUNTAINS OF OREGON:
TODAY...
WEATHER...MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS
LATE THIS AFTERNOON OVER THE OCHOCO MOUNTAINS.
MAX TEMP...64-68 RIDGES...67-73 VALLEYS.
24 HR TREND...DOWN 4-6.
MIN RH...30-40 PCT RIDGES...25-35 PCT VALLEYS.
24 HR TREND...UP 10-20 PCT.
20 FT WIND...NW-N 5-10 MPH WITH GUSTS TO 15-20 MPH.
RIDGE TOP WIND...W-NW 6-12 MPH WITH GUSTS 20-25 MPH.
CWR...10 PCT OVER THE OCHOCO MOUNTAINS...0 PCT ELSEWHERE.
LAL...1-2.
HAINES...4 (LOW).
TONIGHT...
WEATHER...PARTLY CLOUDY. ISOLATED EVENING SHOWERS AND
THUNDERSTORMS.
MIN TEMP...40-45 RIDGES...38-43 VALLEYS.
24 HR TREND...LITTLE CHANGE.
MAX RH...55-65 PCT RIDGES...75-85 VALLEYS AND MEADOWS.
24 TREND...UP 4-6 PCT.
20 FOOT WIND...EVENING W-NW 5-10 MPH WITH GUSTS 15-20
MPH...DECREASING TO 5-10 MPH AFTER MIDNIGHT.
RIDGE TOP WIND...EVENING W-NW 7-13 MPH WITH GUSTS 20-25
MPH...DECREASING TO 5-10 MPH AFTER MIDNIGHT.
CWR...10 PCT.
LAL...2 EARLY...BECOMING 1 BY MIDNIGHT.
HAINES...4 (LOW).
WEDNESDAY...
WEATHER...PARTLY CLOUDY.
MAX TEMP...65-71 RIDGES...71-77 VALLEYS.
24 HR TREND...UP 1-3.
MIN RH...30-40 PCT RIDGES...25-35 PCT VALLEYS.
24 HR TREND...LITTLE CHANGE.
20 FT WIND...N 5-8 MPH WITH GUSTS TO 18 MPH.
RIDGE TOP WIND...N 6-12 MPH WITH GUSTS TO 25 MPH.
CWR...00 PCT.
LAL...1.
HAINES...4 (LOW).
ZONES: 632,633,634,635,638...NORTHEAST OREGON MOUNTAINS:
TODAY...
WEATHER...MOSTLY CLOUDY. ISOLATED AFTERNOON SHOWERS OR
THUNDERSTORMS.
MAX TEMP...63-68 RIDGES...68-73 VALLEYS.
24 HR TREND...DOWN 10-15.
MIN RH...40-50 PCT RIDGES...35-45 PCT VALLEYS.
24 HR TREND...UP 20-30 PCT.
20 FT WIND...NW 4-8 MPH WITH GUSTS TO 12-18 MPH.
RIDGE TOP WIND...NW 6-12 WITH GUSTS TO 20-25 MPH.
CWR...10 PCT.
LAL...1-2.
HAINES...4 (LOW).
TONIGHT...
WEATHER...MOSTLY CLOUDY WITH ISOLATED SHOWERS AND EVENING
THUNDERSTORMS. SNOW LEVEL LOWERING TO AROUND 7500
FEET OVERNIGHT.
MIN TEMP...42-52 RIDGES...32-42 VALLEYS AND HIGHER
MOUNTAINS/MEADOWS.
24 HR TREND...LITTLE CHANGE.
MAX RH...55-65 PCT RIDGES...70-80 PCT VALLEYS/MEADOWS
24 TREND...UP 2-4 PCT.
20 FOOT WIND...W-NW 5-8 MPH WITH EVENING GUSTS TO 15 MPH...
BECOMING DOWNSLOPE 2-5 MPH AROUND MIDNIGHT.
RIDGE TOP WIND...W-NW 6-10 MPH WITH EVENING GUSTS TO 20 MPH.
CWR...20 PCT.
LAL...1-2.
HAINES...4 (LOW).
WEDNESDAY...
WEATHER...MOSTLY CLOUDY WITH ISOLATED SHOWERS OR THUNDERSTORMS.
MAX TEMP...65-70 RIDGES...70-75 VALLEYS.
24 HR TREND...UP 1-3.
MIN RH...38-44 PCT RIDGES....35-45 PCT VALLEYS.
24 HR TREND...DOWN 2-3 RIDGES...LITTLE CHANGE VALLEYS.
20 FT WIND...NW-N 5-8 MPH WITH GUSTS TO 20 MPH.
RIDGE TOP WIND...NW 8-13 MPH WITH AFTERNOON GUSTS TO 25 MPH.
CWR...10 PCT.
LAL...1-2.
HAINES...4 (LOW).
ZONE 631 AND 675...COLUMBIA BASIN OF OREGON AND THE EASTERN COLUMBIA
BASIN OF WASHINGTON:
TODAY...
WEATHER...MOSTLY CLOUDY.
MAX TEMP...65-73 RIDGES...73-80 VALLEYS.
24 HR TREND...DOWN 6-9.
MIN RH...29-37 PCT.
24 HR TREND...UP 15-20 PCT.
20 FT WIND...W-NW 6-12 MPH...WITH GUSTS 15-20 MPH WITH HIGHER
GUSTS IN THE EASTERN COLUMBIA GORGE.
RIDGE TOP WIND...W-NW 8-15 WITH GUSTS TO NEAR 25 MPH THIS
AFTERNOON
CWR...0 PCT.
LAL...1.
HAINES...4 (LOW).
TONIGHT...
WEATHER...PARTLY CLOUDY. ISOLATED SHOWERS OR A THUNDERSTORM
NEAR THE BLUE MOUNTAINS THIS EVENING.
MIN TEMP...48-58.
24 HR TREND...LITTLE CHANGE.
MAX RH...65-75 PCT.
24 TREND...LITTLE CHANGE.
20 FOOT WIND...SW-W 3-7 MPH...EXCEPT 10-15 MPH WITH GUSTS TO 20
MPH EASTERN COLUMBIA GORGE.
RIDGE TOP WIND...EVENING W-NW 6-12 MPH WITH GUSTS TO 20 MPH.
CWR...0 PCT.
LAL...1-2.
HAINES...4 (LOW).
WEDNESDAY...
WEATHER...PARTLY CLOUDY. A SLIGHT CHANCE OF MAINLY AFTERNOON
SHOWERS.
MAX TEMP...65-73 RIDGES...73-80 VALLEYS.
24 HR TREND...DOWN 2-5.
MIN RH...31-39 PCT.
24 HR TREND...UP 2-3 PCT.
20 FT WIND...SW-W 5-10 MPH...EXCEPT 10-15 MPH WITH GUSTS TO 25
MPH IN THE EASTERN COLUMBIA GORGE.
RIDGE TOP WIND...W-NW 8-13 MPH.
CWR...0 PCT.
LAL...1.
HAINES...4 (LOW).
ZONE 681...YAKAMA ALPINE DISTRICT:
TODAY...
WEATHER...MOSTLY CLOUDY.
MAX TEMP...55-65 RIDGES...65-75 VALLEYS.
24 HR TREND...DOWN 4-6.
MIN RH...43-50 RIDGES...37-43 VALLEYS.
24 HR TREND...UP 12-18 PCT.
20 FT WIND...W-NW 5-10 MPH.
RIDGE TOP WIND...W-NW 6-12 MPH.
CWR...10 PCT.
LAL...1.
HAINES...3 (VERY LOW).
TONIGHT...
WEATHER...MOSTLY CLOUDY.
MIN TEMP...38-43 RIDGES...43-48 VALLEYS.
24 HR TREND...DOWN 2-3.
MAX RH...65-75 PCT RIDGES...75-85 PCT VALLEYS.
24 TREND...LITTLE CHANGE.
20 FOOT WIND...W-NW 5-10 MPH WITH EVENING GUSTS TO 20
MPH...DECREASING TO 4-8 MPH AFTER MIDNIGHT.
RIDGE TOP WIND...NW-N 7-12 MPH WITH EVENING GUSTS TO 25
MPH...DECREASING TO 5-10 MPH LATE.
CWR...0 PCT.
LAL...1.
HAINES...3 (VERY LOW).
WEDNESDAY...
WEATHER...PARTLY CLOUDY.
MAX TEMP...55-65 RIDGES...65-75 VALLEYS. VALLEYS.
24 HR TREND...LITTLE CHANGE.
MIN RH...43-50 RIDGES...37-43 VALLEYS.
24 HR TREND...LITTLE CHANGE.
20 FT WIND...W-NW 3-7 MPH WITH GUSTS TO 15 MPH.
RIDGE TOP WIND...N 6-12 MPH WITH GUSTS TO 20 MPH.
CWR...0 PCT.
LAL...1.
HAINES...3 (VERY LOW).
EXTENDED FORECAST...THURSDAY THROUGH SATURDAY...
THURSDAY...PARTLY CLOUDY. ISOLATED SHOWERS OR THUNDERSTORMS.
LOWS 35-45 MOUNTAINS...EXCEPT 50-55 BASIN. HIGHS
70-80 MOUNTAINS AND 80-90 VALLEYS/BASIN.
FRIDAY...PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS
OR THUNDERSTORMS OVER THE MOUNTAINS. LOWS 40-50...EXCEPT
55-60 BASIN. HIGHS 70-80 MOUNTAINS AND 80-90 VALLEYS/BASIN.
SATURDAY...PARTLY CLOUDY WITH ISOLATED SHOWERS OR THUNDERSTORMS.
LOWS 40-50...EXCEPT 55-60 BASIN. HIGHS 70-80 MOUNTAINS AND
80-90 VALLEYS/BASIN.
WIND OUTLOOK:
THURSDAY...NW-NE 5-10 MPH.
FRIDAY...SW-NW 5-10 MPH.
SATURDAY...E 5-10 MPH.
6-10 DAY OUTLOOK...SUNDAY AUG 25 - THURSDAY AUG 29 2002...
NEAR NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION
THROUGH THE PERIOD.
FIRE WEATHER PROBABILITY FORECAST FOR ZONE 632
THIS IS AN EXPERIMENTAL FIVE DAY PROBABILITY FORECAST OF SELECTED
WEATHER PARAMETERS IN TENS OF PERCENT. THIS DATA DOES NOT APPLY TO
AND SHOULD NOT BE USED FOR ANY ZONE...OTHER THAN OREGON ZONE 632.
ISSUED...MON AUG 19 2002...VALID BEGINNING TUE AUG 20 2002.
ZONE PRECIP RH WIND LIGHTNING
632 11010 33434 43111 22112
1. CHANCE OF 0.10 OR MORE PRECIP OVER HALF OR MORE OF THE
ZONE.
2. CHANCE OF RH LESS THAN 15% OCCURRING OVER HALF OR MORE OF THE
ZONE.
3. CHANCE OF SUSTAINED SURFACE WINDS OF 14 MPH OR GREATER
OVER HALF OR MORE OF THE ZONE FOR AT LEAST ONE HOUR.
4. CHANCE OF RECEIVING ONE OR MORE LIGHTNING STRIKES IN THE ZONE.