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Western Shasta Trinity NF Including Trinity Alps and Trinity Dam/Clair Engle Lake
Central Shasta Trinity NF Including Lake Shasta Area and North Valley Foothills
Eastern Shasta Trinity NF Including Mt Shasta/McCloud Basin and Burney Basin
Forecast is more than 12 hours old! Use with caution!
Forecast Issuance time: 400 PM PST TUE NOV 24 2009
.DISCUSSION...
RIDGE OF HIGH PRESSURE OVER THE AREA THROUGH WEDNESDAY BRINGING MILD
TEMPERATURES AND DRY WEATHER. SURFACE HIGH PRESSURE OVER THE
GREAT BASIN AND THERMAL TROUGH OVER CALIFORNIA BRINGING NORTH TO
EAST WINDS OVER THE AREA ESPECIALLY IN NORTHEAST TO SOUTHWEST
ORIENTED CANYONS AND PASSES IN THE WEST SLOPE OF THE SIERRA. A
COLD FRONT AND ASSOCIATED TROUGH WILL SPLIT AND MOVE THROUGH THE
NORTHERN PORTION OF THE AREA LATE THURSDAY INTO FRIDAY BRINGING
COOLER TEMPERATURES AND SOUTHWESTERLY WINDS ALONG WITH A CHANCE OF
RAIN AND SNOW...MAINLY NORTH OF HIGHWAY 50. RIDGE OF HIGH PRESSURE
BUILDS IN BEHIND THIS SYSTEM BRINGING DRY WEATHER AND GUSTY NORTH
TO EAST WINDS LATE FRIDAY INTO THE WEEKEND.
.TONIGHT...MOSTLY CLEAR. PATCHY FOG AFTER MIDNIGHT. LOWS
45-50 LOWER ELEVATIONS...AND LOWS 35-40 HIGHER ELEVATIONS.
MAXIMUM HUMIDITY 65-85 PERCENT. WINDS VARIABLE 2 TO 5 MPH IN THE
VALLEYS AND VARIABLE 2 TO 4 MPH OVER THE RIDGES. CHANCE OF
WETTING RAIN 0 PERCENT.
.WEDNESDAY...MOSTLY SUNNY. PATCHY FOG EARLY IN THE MORNING. HIGHS
60-70. MINIMUM HUMIDITY 30-40 PERCENT LOWER ELEVATIONS...AND
MINIMUM HUMIDITY 20-30 PERCENT HIGHER ELEVATIONS. WINDS VARIABLE
1 TO 3 MPH. CHANCE OF WETTING RAIN 0 PERCENT.
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS 40-50. WINDS VARIABLE 2 TO
4 MPH IN THE VALLEYS AND VARIABLE 2 TO 5 MPH OVER THE RIDGES.
MAXIMUM HUMIDITY 65-75 PERCENT LOWER ELEVATIONS...AND MAXIMUM
HUMIDITY 45-60 PERCENT HIGHER ELEVATIONS. CHANCE OF WETTING RAIN
0 PERCENT.
.THANKSGIVING DAY...MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. HIGHS
50-60. WINDS VARIABLE 2 TO 4 MPH IN THE VALLEYS AND SOUTH 10 TO
13 MPH OVER THE RIDGES. MINIMUM HUMIDITY 40-50 PERCENT LOWER
ELEVATIONS...AND MINIMUM HUMIDITY 25-40 PERCENT HIGHER
ELEVATIONS. CHANCE OF WETTING RAIN 0 PERCENT.
.EXTENDED...
.FRIDAY...COOLER...WINDY. RAIN LIKELY AND SLIGHT CHANCE OF SNOW
SHOWERS. LOWS 30 TO 35. HIGHS 40 TO 50. WEST WINDS 20 TO 30 MPH.
.SATURDAY...PARTLY CLOUDY. BREEZY. LOWS 20 TO 30. HIGHS 45 TO 55.
NORTH WINDS 15 TO 25 MPH.
.SUNDAY...MOSTLY CLEAR. BREEZY. LOWS 25 TO 35. HIGHS 45 TO 55.
NORTH WINDS 20 TO 25 MPH.
Forecast is more than 12 hours old! Use with caution!
Forecast Issuance time: 400 PM PST TUE NOV 24 2009
.DISCUSSION...
RIDGE OF HIGH PRESSURE OVER THE AREA THROUGH WEDNESDAY BRINGING MILD
TEMPERATURES AND DRY WEATHER. SURFACE HIGH PRESSURE OVER THE
GREAT BASIN AND THERMAL TROUGH OVER CALIFORNIA BRINGING NORTH TO
EAST WINDS OVER THE AREA ESPECIALLY IN NORTHEAST TO SOUTHWEST
ORIENTED CANYONS AND PASSES IN THE WEST SLOPE OF THE SIERRA. A
COLD FRONT AND ASSOCIATED TROUGH WILL SPLIT AND MOVE THROUGH THE
NORTHERN PORTION OF THE AREA LATE THURSDAY INTO FRIDAY BRINGING
COOLER TEMPERATURES AND SOUTHWESTERLY WINDS ALONG WITH A CHANCE OF
RAIN AND SNOW...MAINLY NORTH OF HIGHWAY 50. RIDGE OF HIGH PRESSURE
BUILDS IN BEHIND THIS SYSTEM BRINGING DRY WEATHER AND GUSTY NORTH
TO EAST WINDS LATE FRIDAY INTO THE WEEKEND.
.TONIGHT...MOSTLY CLEAR. LOWS 30-45. MAXIMUM HUMIDITY
55-75 PERCENT. NORTH WINDS 10 TO 16 MPH. CHANCE OF WETTING RAIN
0 PERCENT.
.WEDNESDAY...SUNNY. HIGHS 60-70 LOWER ELEVATIONS...AND HIGHS
55-60 HIGHER ELEVATIONS. MINIMUM HUMIDITY 35-45 PERCENT. IN THE
VALLEYS...NORTH WINDS 10 TO 16 MPH IN THE MORNING BECOMING
VARIABLE 4 TO 9 MPH. OVER THE RIDGES...NORTHEAST WINDS 10 TO
17 MPH. CHANCE OF WETTING RAIN 0 PERCENT.
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS 30-45. NORTH WINDS 10 TO
14 MPH. MAXIMUM HUMIDITY 70-90 PERCENT LOWER ELEVATIONS...AND
MAXIMUM HUMIDITY 60-80 PERCENT HIGHER ELEVATIONS. CHANCE OF
WETTING RAIN 0 PERCENT.
.THANKSGIVING DAY...MOSTLY CLOUDY. SLIGHT CHANCE OF RAIN. HIGHS
50-60. IN THE VALLEYS...NORTHEAST WINDS 10 TO 11 MPH IN THE
MORNING BECOMING VARIABLE 3 TO 7 MPH. OVER THE RIDGES...EAST
WINDS AROUND 10 MPH IN THE MORNING BECOMING VARIABLE 4 TO 8 MPH.
MINIMUM HUMIDITY 45-60 PERCENT. CHANCE OF WETTING RAIN
10 PERCENT.
.EXTENDED...
.FRIDAY...COOLER...BREEZY. CLOUDY WITH CHANCE OF SHOWERS. LOWS
30 TO 40. HIGHS 45 TO 55. SOUTH WINDS 20 TO 25 MPH.
.SATURDAY...PARTLY CLOUDY. BREEZY. LOWS 25 TO 35. HIGHS 50 TO 60.
NORTH WINDS 15 TO 25 MPH.
.SUNDAY...PARTLY CLOUDY. WINDY. LOWS 30 TO 40. HIGHS 50 TO 60.
NORTH WINDS 20 TO 30 MPH.
Forecast is more than 12 hours old! Use with caution!
Forecast Issuance time: 400 PM PST TUE NOV 24 2009
.DISCUSSION...
RIDGE OF HIGH PRESSURE OVER THE AREA THROUGH WEDNESDAY BRINGING MILD
TEMPERATURES AND DRY WEATHER. SURFACE HIGH PRESSURE OVER THE
GREAT BASIN AND THERMAL TROUGH OVER CALIFORNIA BRINGING NORTH TO
EAST WINDS OVER THE AREA ESPECIALLY IN NORTHEAST TO SOUTHWEST
ORIENTED CANYONS AND PASSES IN THE WEST SLOPE OF THE SIERRA. A
COLD FRONT AND ASSOCIATED TROUGH WILL SPLIT AND MOVE THROUGH THE
NORTHERN PORTION OF THE AREA LATE THURSDAY INTO FRIDAY BRINGING
COOLER TEMPERATURES AND SOUTHWESTERLY WINDS ALONG WITH A CHANCE OF
RAIN AND SNOW...MAINLY NORTH OF HIGHWAY 50. RIDGE OF HIGH PRESSURE
BUILDS IN BEHIND THIS SYSTEM BRINGING DRY WEATHER AND GUSTY NORTH
TO EAST WINDS LATE FRIDAY INTO THE WEEKEND.
.TONIGHT...MOSTLY CLEAR. LOWS 30-40. MAXIMUM HUMIDITY
55-75 PERCENT. NORTHEAST WINDS 10 TO 14 MPH. CHANCE OF WETTING
RAIN 0 PERCENT.
.WEDNESDAY...SUNNY. HIGHS 55-70. MINIMUM HUMIDITY 30-45 PERCENT.
NORTHEAST WINDS AROUND 10 MPH IN THE MORNING BECOMING VARIABLE
3 TO 7 MPH. CHANCE OF WETTING RAIN 0 PERCENT.
.WEDNESDAY NIGHT...MOSTLY CLEAR. LOWS 30-40. WINDS VARIABLE 3 TO
6 MPH. MAXIMUM HUMIDITY 70-90 PERCENT LOWER ELEVATIONS...AND
MAXIMUM HUMIDITY 60-80 PERCENT HIGHER ELEVATIONS. CHANCE OF
WETTING RAIN 0 PERCENT.
.THANKSGIVING DAY...MOSTLY CLOUDY. HIGHS 50-65. WINDS VARIABLE
3 TO 6 MPH IN THE VALLEYS AND SOUTH 10 TO 14 MPH OVER THE RIDGES.
MINIMUM HUMIDITY 40-50 PERCENT. CHANCE OF WETTING RAIN 0 PERCENT.
.EXTENDED...
.FRIDAY...COOLER...WINDY. RAIN AND SNOW LIKELY. LOWS 25 TO 35.
HIGHS 45 TO 55. SOUTHWEST WINDS 20 TO 30 MPH.
.SATURDAY...PARTLY CLOUDY. LOWS 20 TO 30. HIGHS 50 TO 60.
NORTHEAST WINDS 15 TO 20 MPH.
.SUNDAY...PARTLY CLOUDY. WINDY. LOWS 25 TO 35. HIGHS 50 TO 60.
NORTHEAST WINDS 20 TO 30 MPH.
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