National Weather Service Fire Weather Planning Forecast
For the Northern Sierra Nevada & Tahoe National Forest
FIRE WEATHER PLANNING FORECAST FOR INTERIOR NORTHERN CALIFORNIA
NATIONAL WEATHER SERVICE SACRAMENTO CA
330 PM PDT FRI SEP 3 2010
DISCUSSION...LITTLE CHANGE IN WEATHER PATTERN FRIDAY NIGHT AS REGION REMAINS UNDER UPPER LEVEL HIGH WITH WINDS REMAINING RELATIVELY LIGHT. MOST AREAS WILL SEE A LITTLE COOLING ON SATURDAY AS AN UPPER LEVEL LOW TRACKS THROUGH THE PACIFIC NORTHWEST. THIS WILL ALSO BRING SOME WESTERLY BREEZES OVER THE RIDGETOPS ESPECIALLY OVER THE NORTHERN MOUNTAINS. AS THIS SYSTEM SHIFTS EAST...A NORTHERLY SURFACE GRADIENT WILL DEVELOP BRINGING BREEZY NORTH WINDS DOWN THE SACRAMENTO VALLEY AND SURROUNDING FOOTHILLS SUNDAY AFTERNOON AND NIGHT. LIGHTER WINDS ON MONDAY WILL BE FOLLOWED BY ANOTHER LOW PRESSURE SYSTEM DROPPING DOWN THE COAST ON TUESDAY BRINGING COOLING AND INCREASED ONSHORE FLOW. THE MOUNTAIN AREAS COULD SEE A ROUND OF SHOWERS FROM THIS SYSTEM BY TUESDAY NIGHT OR WEDNESDAY OF NEXT WEEK.
NORTHERN SIERRA INCLUDING THE TAHOE AND ELDORADO NF/S WEST OF THE
SIERRA CREST-
330 PM PDT FRI SEP 3 2010
.TONIGHT...
SKY/WEATHER..............CLEAR.
MIN TEMPERATURE..........53-60 LOWER ELEVATIONS...EXCEPT 45-53
HIGHER ELEVATIONS.
24 HR TREND...........2-4 DEGREES COOLER.
MAX HUMIDITY.............35-50 PERCENT.
24 HR TREND...........HIGHER 3-6 PERCENT.
20-FOOT WINDS............
VALLEYS/LWR SLOPES...SOUTHWEST WINDS 3 TO 8 MPH SHIFTING TO THE
EAST IN THE LATE EVENING AND OVERNIGHT.
RIDGES/UPR SLOPES....SHIFTING TO SOUTHEAST WINDS 3 TO 8 MPH.
LOCAL GUSTS UP TO 25 MPH.
CWR......................0 PERCENT.
LAL......................1.
.SATURDAY...
SKY/WEATHER..............SUNNY.
MAX TEMPERATURE..........85-93 LOWER ELEVATIONS...EXCEPT 72-82
HIGHER ELEVATIONS.
24 HR TREND...........2-5 DEGREES COOLER.
MIN HUMIDITY.............15-21 PERCENT.
24 HR TREND...........LITTLE CHANGE.
20-FOOT WINDS............
VALLEYS/LWR SLOPES...EAST WINDS 3 TO 8 MPH SHIFTING TO THE
SOUTHWEST 6 TO 12 MPH IN THE AFTERNOON.
RIDGES/UPR SLOPES....SOUTHEAST WINDS 2 TO 7 MPH WITH LOCAL
GUSTS UP TO 20 MPH INCREASING TO SOUTHWEST
12 TO 18 MPH WITH LOCAL GUSTS UP TO 35 MPH
IN THE AFTERNOON.
CWR......................0 PERCENT.
LAL......................1.
.SATURDAY NIGHT...
SKY/WEATHER..............CLEAR.
MIN TEMPERATURE..........52-60 LOWER ELEVATIONS...EXCEPT 44-54
HIGHER ELEVATIONS.
MAX HUMIDITY.............48-63 PERCENT.
20-FOOT WINDS............
VALLEYS/LWR SLOPES...SOUTHWEST WINDS 4 TO 9 MPH WITH LOCAL
GUSTS UP TO 20 MPH SHIFTING TO THE EAST 1
TO 6 MPH AFTER MIDNIGHT.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 11 TO 17 MPH WITH LOCAL
GUSTS UP TO 35 MPH BECOMING SOUTHEAST 2 TO
7 MPH WITH LOCAL GUSTS UP TO 20 MPH AFTER
MIDNIGHT.
CWR......................0 PERCENT.
LAL......................1.
.SUNDAY...
SKY/WEATHER..............SUNNY.
MAX TEMPERATURE..........77-85 LOWER ELEVATIONS...EXCEPT 65-75
HIGHER ELEVATIONS.
MIN HUMIDITY.............11-26 PERCENT.
20-FOOT WINDS............
VALLEYS/LWR SLOPES...EAST WINDS 2 TO 7 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
RIDGES/UPR SLOPES....SOUTHWEST WINDS 7 TO 13 MPH WITH LOCAL
GUSTS UP TO 25 MPH.
CWR......................0 PERCENT.
LAL......................1.
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