000 
FNUS55 KPSR 231643
FWFPSR

SOUTHWEST AND SOUTH-CENTRAL ARIZONA...AND SOUTHEAST CALIFORNIA
FIRE WEATHER FORECAST
NATIONAL WEATHER SERVICE PHOENIX AZ
900 AM MST (800 AM PST) SUN FEB 23 2003

...INCREASING CHANCE OF SHOWERS AND THUNDERSTORMS LATE MONDAY AND
TUESDAY...

.SYNOPSIS...
INCREASING CLOUDS ARE EXPECTED TODAY WITH SOMEWHAT COOLER DAYTIME
HIGHS...AS A WEAK DISTURBANCE APPROACHES THE SOUTHERN CALIFORNIA AND
NORTHERN BAJA COAST. HOWEVER...A STRONGER WINTER STORM FROM THE GULF
OF ALASKA WILL BRING SHOWERS AND THUNDERSTORMS TO SOUTHEAST
CALIFORNIA AND ARIZONA BY LATE MONDAY NIGHT THROUGH TUESDAY EVENING.
IT WILL ALSO BE BREEZY TO WINDY LATE MONDAY AND MONDAY NIGHT...AND
COOLER TUESDAY. LOW PRESSURE SYSTEMS OVER THE WESTERN UNITED STATES
WILL RESULT IN A CHANCE OF SHOWERS WEDNESDAY...DECREASING TO A
SLIGHT CHANCE OF SHOWERS THURSDAY AND FRIDAY. SOMEWHAT HIGHER
PRESSURE ALOFT IS EXPECTED TO BRING DRY AND SOMEWHAT WARMER WEATHER
NEXT SATURDAY.

AZZ132-241600-
WEST CENTRAL DESERTS/NORTHWEST MARICOPA COUNTY/GREATER PHOENIX AREA/
SOUTHWEST DESERTS/SOUTHWEST MARICOPA COUNTY/
NORTHWEST AND NORTH CENTRAL PINAL COUNTY-
PHOENIX BLM/YUMA BLM/CAZ-CRZ-
900 AM MST SUN FEB 23 2003

.TODAY...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMPS...IN THE UPPER 60S TO MID 70S.
  MIN RH...21 TO 28 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...LIGHT DOWNSLOPE/DOWNVALLEY MORNING BECOMING
                   MOSTLY UPSLOPE/UPVALLEY 5 TO 10 MPH IN THE
                   AFTERNOON.
   10000 FOOT FREE AIR WIND...WEST 15 TO 25 MPH.

.TONIGHT...
  SKY/WEATHER...PARTLY CLOUDY.
  MIN TEMPS...IN THE MIDDLE 30S TO MIDDLE 50S.
  MAX RH...40 TO 50 PCT RIDGES TO 60 TO 75 PCT DRAINAGE AREAS.
  WINDS - 20 FEET...
    SLOPE/VALLEY...BECOMING MOSTLY LIGHT DOWNSLOPE/DOWNVALLEY...
                   LOCALLY SOUTHEAST 5 TO 10 MPH.
  10000 FOOT FREE AIR WIND...MOSTLY SOUTHWEST 15 TO 25 MPH.

.TOMORROW...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMP TRENDS...LITTLE CHANGE TO DOWN 3 DEG.
  MIN RH TRENDS...UP 2 TO 6 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTH TO SOUTHWEST 10 TO 15 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 20 TO 30 MPH.

.TOMORROW NIGHT...
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTH TO SOUTHEAST 10 TO 20 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 30 TO 40 MPH.

.EXTENDED FORECAST...
>>SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED<<
.TUESDAY...SHOWERS AND THUNDERSTORMS IN THE MORNING...DECREASING
SOMEWHAT FROM THE WEST DURING THE AFTERNOON. BREEZY. LOWS IN THE
UPPER 30S TO MIDDLE 50S. HIGHS IN THE 60S.
.WEDNESDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE MIDDLE 30S
TO LOWER 50S. HIGHS IN THE 60S.
.THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
LOWER 30S TO UPPER 40S. HIGHS IN THE 60S.

$$

AZZ133-241600-
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/
CAZ-
900 AM MST SUN FEB 23 2003

.TODAY...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMPS...IN THE UPPER 50S TO NEAR 70.
  MIN RH...20 TO 30 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...LIGHT DOWNSLOPE/DOWNVALLEY MORNING BECOMING
                   MOSTLY UPSLOPE/UPVALLEY 5 TO 10 MPH IN THE
                   AFTERNOON.
   10000 FOOT FREE AIR WIND...NORTHWEST AND WEST 15 TO 25 MPH.

.TONIGHT...
  SKY/WEATHER...PARTLY CLOUDY.
  MIN TEMPS...IN THE LOWER 30S TO UPPER 40S.
  MAX RH...60 TO 80 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...BECOMING MOSTLY LIGHT DOWNSLOPE/DOWNVALLEY...
                   LOCALLY SOUTHWEST 5 TO 10 MPH.
  10000 FOOT FREE AIR WIND...WEST AND SOUTHWEST 20 TO 30 MPH.

.TOMORROW...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMP TRENDS...LITTLE CHANGE TO UP 2 DEG.
  MIN RH TRENDS...UP 5 TO 10 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTH TO SOUTHWEST 15 TO 25 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 20 TO 30 MPH.

.TOMORROW NIGHT...
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTH TO SOUTHWEST 12 TO 22 MPH
  10000 FOOT FREE AIR WIND...SOUTHWEST 35 TO 45 MPH.

.EXTENDED FORECAST...
>>SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED<<
.TUESDAY...SHOWERS AND THUNDERSTORMS...THEN SHOWERS AND
THUNDERSTORMS LIKELY IN THE EVENING. BREEZY. LOWS IN THE MIDDLE 30S
TO UPPER 40S. HIGHS IN THE LOWER 50S TO MID 60S.
.WEDNESDAY...MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE LOWER 30S
TO MID 40S. HIGHS IN THE UPPER 40S TO LOWER 60S.
.THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
LOWER 30S TO MID 40S. HIGHS IN THE LOWER 50S TO LOWER 60S.

$$

AZZ131-CAZ231-241600-
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-
LOWER COLORADO RIVER VALLEY CA-
YUMA BLM/CRZ-
900 AM MST (800 AM PST) SUN FEB 23 2003

.TODAY...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMPS...IN THE LOWER TO MID 70S.
  MIN RH...17 TO 27 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...LIGHT SOUTH TO SOUTHEAST 5 TO 10 MPH.
   10000 FOOT FREE AIR WIND...WEST 10 TO 20 MPH.

.TONIGHT...
  SKY/WEATHER...PARTLY CLOUDY.
  MIN TEMPS...IN THE MID 40S TO MID 50S.
  MAX RH...60 TO 75 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...BECOMING MOSTLY LIGHT DOWNSLOPE/DOWNVALLEY...
                   LOCALLY SOUTHEAST 5 TO 10 MPH.
  10000 FOOT FREE AIR WIND...MOSTLY SOUTHWEST 15 TO 25 MPH.

.TOMORROW...
  SKY/WEATHER...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
  MAX TEMP TRENDS...LITTLE CHANGE TO DOWN 2 DEG.
  MIN RH TRENDS...UP 5 TO 10 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTH TO SOUTHWEST 10 TO 20 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 20 TO 30 MPH.

.TOMORROW NIGHT...
  WINDS - 20 FEET...
    SLOPE/VALLEY...VARIABLE MAINLY SOUTHWEST 5 TO 10 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 30 TO 40 MPH.

.EXTENDED FORECAST...
>>SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED<<
.TUESDAY...SHOWERS AND THUNDERSTORMS LIKELY IN THE MORNING...THEN
CHANCE OF SHOWERS AND THUNDERSTORMS EARLY IN THE AFTERNOON. BREEZY.
LOWS IN THE MIDDLE 40S TO MIDDLE 50S. HIGHS IN THE 60S. CHANCE OF
RAIN 60 PERCENT.
.WEDNESDAY...PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE LOWER 40S
TO LOWER 50S. HIGHS IN THE LOWER TO MID 60S.
.THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE
UPPER 30S TO UPPER 40S. HIGHS IN THE LOWER TO MID 60S.

$$

CAZ230-241600-
JOSHUA TREE NATIONAL PARK-
800 AM PST SUN FEB 23 2003

.TODAY...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMPS...IN THE LOWER 60S TO LOWER 70S.
  MIN RH...15 TO 25 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...LIGHT DOWNSLOPE/DOWNVALLEY MORNING BECOMING
                   MOSTLY SOUTH TO SOUTHWEST 5 TO 10 MPH IN THE
                   AFTERNOON.
   10000 FOOT FREE AIR WIND...WEST 10 TO 20 MPH.

.TONIGHT...
  SKY/WEATHER...PARTLY CLOUDY.
  MIN TEMPS...IN THE UPPER 30S TO LOWER 50S.
  MAX RH...50 TO 65 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...MOSTLY SOUTHWEST 5 TO 10 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 15 TO 25 MPH.

.TOMORROW...
  SKY/WEATHER...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
  MAX TEMP TRENDS...DOWN 1 TO 3 DEG.
  MIN RH TRENDS...UP 10 TO 15 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...BECOMING SOUTHWEST 15 TO 25 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 20 TO 25 MPH.

.TOMORROW NIGHT...
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTHWEST 10 TO 20 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 25 TO 35 MPH.

.EXTENDED FORECAST...
>>SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED<<
.TUESDAY...SHOWERS AND THUNDERSTORMS LIKELY...DECREASING TO A CHANCE
FOR SHOWERS AND THUNDERSTORMS BY THE EVENING. BREEZY. LOWS IN THE
LOWER 40S TO LOWER 50S. HIGHS IN THE LOWER 50S TO LOWER 60S. CHANCE
OF RAIN 60 PERCENT.
.WEDNESDAY...PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE MID 30S
TO MID 40S. HIGHS IN THE UPPER 40S TO LOWER 60S.
.THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE MID
30S TO MID 40S. HIGHS IN THE UPPER 40S TO LOWER 60S.

$$

CAZ232-241600-
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-
800 AM PST SUN FEB 23 2003

.TODAY...
  SKY/WEATHER...PARTLY SUNNY.
  MAX TEMPS...IN THE 70S.
  MIN RH...18 TO 28 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...LIGHT SOUTHEAST.
   10000 FOOT FREE AIR WIND...WEST 10 TO 20 MPH.

.TONIGHT...
  SKY/WEATHER...PARTLY CLOUDY.
  MIN TEMPS...IN THE UPPER 30S TO UPPER 40S.
  MAX RH...60 TO 85 PCT...EXCEPT 45 TO 60 PCT RIDGES.
  WINDS - 20 FEET...
    SLOPE/VALLEY...WEST 5 TO 10 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 15 TO 25 MPH.

.TOMORROW...
  SKY/WEATHER...MOSTLY CLOUDY. SLIGHT CHANCE OF SHOWERS IN THE
AFTERNOON.
  MAX TEMP TRENDS...DOWN 1 TO 3 DEG.
  MIN RH TRENDS...UP 6 TO 12 PCT.
  WINDS - 20 FEET...
    SLOPE/VALLEY...SOUTHWEST 15 TO 25 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 25 TO 30 MPH.

.TOMORROW NIGHT...
  WINDS - 20 FEET...
    SLOPE/VALLEY...WEST TO SOUTHWEST 10 TO 20 MPH.
  10000 FOOT FREE AIR WIND...SOUTHWEST 30 TO 40 MPH.

.EXTENDED FORECAST...
>>SUSTAINED WINDS LESS THAN 20 MPH EXCEPT WHEN SPECIFIED<<
.TUESDAY...CHANCE OF SHOWERS AND THUNDERSTORMS. BREEZY. LOWS IN THE
LOWER 40S TO LOWER 50S. HIGHS IN THE 60S. CHANCE OF RAIN 50 PERCENT.
.WEDNESDAY...PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE MID 30S
TO MID 40S. HIGHS IN THE UPPER 50S TO MID 60S.
.THURSDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS. LOWS IN THE MID
30S TO MID 40S. HIGHS IN THE LOWER TO MID 60S.

$$


.6 TO 10 DAY OUTLOOK...FRIDAY FEBRUARY 28TH THROUGH TUESDAY MARCH
4TH...BELOW NORMAL TEMPERATURES AND NEAR NORMAL PRECIPITATION.


VENTILATION DATA...

              VENTILATION   MIXING HEIGHT   TRANSPORT WINDS

YUMA..........MARGINAL       2800 FEET      SOUTHWEST 7 KNOTS

OUTLOOK FOR TOMORROW...BECOMING GOOD TO VERY GOOD VENTILATION BY
TOMORROW AFTERNOON WITH SOUTH TO SOUTHWEST TRANSPORT WINDS.