610  
FNUS55 KPSR 251106  
FWFPSR  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL  
ARIZONA AND SOUTHEAST CALIFORNIA  
NATIONAL WEATHER SERVICE PHOENIX AZ  
406 AM MST SAT MAR 25 2017  
   
DISCUSSION
 
 
LOW PRESSURE WILL TRACK THROUGH NORTHERN ARIZONA TODAY. TROUGH  
HEIGHTS WILL SPAN SOUTH TO THE INTERNATIONAL BORDER AND BRING IN  
SOME DRIER MOISTURE INTO THE AREA, DRYING HUMIDITIES INTO THE  
12-17 PERCENT RANGE SOUTH-SOUTHEAST OF THE PHOENIX AREA AND 20-30  
PERCENT ACROSS THE REST OF THE FORECAST AREA. OVERNIGHT RECOVERIES  
WILL RANGE FROM 50-75 PERCENT. BREEZY TO GUSTY AFTERNOON WINDS TO  
DEVELOP AGAIN WITH WESTERLY GUSTS 20-30 MPH MIDDAY INTO LATE  
AFTERNOON ACROSS SOUTH-CENTRAL AZ. STRONGER WEST GUSTS DOWNWIND  
OF THE CA COASTAL RANGES 30-40 MPH WILL LAST INTO THE OVERNIGHT  
HOURS. FEW POCKETS OF LOCALIZED CRITICAL FIRE WEATHER CONDITIONS  
MAY DEVELOP BETWEEN PHOENIX AND TUCSON FOR A FEW HOURS THIS  
AFTERNOON. HIGH TEMPERATURES WILL TREND SLIGHTLY ABOVE SEASONAL  
AVERAGES IN THE 80S FOR MANY OF THE LOWER ELEVATIONS.  
 
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND  
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.  
 
AZZ132-252315-  
WEST CENTRAL DESERTS/NORTHWEST MARICOPA COUNTY/GREATER PHOENIX  
AREA/SOUTHWEST DESERTS/SOUTHWEST MARICOPA COUNTY/  
NORTHWEST AND NORTH-CENTRAL PINAL COUNTY-  
PHOENIX BLM/YUM BLM/CAZ-CRZ-  
406 AM MST SAT MAR 25 2017  
   
TODAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY.  
* MAX TEMPERATURE.................76-83.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................17-24 PCT.  
* 24 HR TREND..................4 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR PHOENIX.......9100 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 10 KNOTS.  
* DISPERSION FOR PHOENIX..........VERY GOOD.  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................50-60.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................51-66 PCT.  
* 24 HR TREND..................7 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................77-83.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................17-22 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 OR LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR PHOENIX.......8600 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......WEST 6 KNOTS.  
* DISPERSION FOR PHOENIX..........GOOD.  
 
   
EXTENDED
 
   
MONDAY
 
MOSTLY CLEAR. LOWS 52-62. HIGHS 77-84. SOUTHWEST WINDS  
10 TO 20 MPH.    
TUESDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS  
49-59. HIGHS 71-78. NORTHWEST WINDS 15 TO 25 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 49-59. HIGHS 77-83. NORTHWEST  
WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLEAR. LOWS 49-59. HIGHS 78-84.    
FRIDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS  
51-61. HIGHS 73-80.  
 

 
 
AZZ133-252315-  
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-  
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/  
CAZ-  
406 AM MST SAT MAR 25 2017  
   
TODAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY.  
* MAX TEMPERATURE.................65-78.  
* 24 HR TREND..................3 DEGREES WARMER.  
* MIN HUMIDITY....................18-24 PCT.  
* 24 HR TREND..................8 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 10 MPH IN THE MORNING  
BECOMING SOUTHWEST 5 TO 15 MPH IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................36-51.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................61-75 PCT.  
* 24 HR TREND..................3 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................66-78.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................19-25 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........3 OR VERY LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
MONDAY
 
MOSTLY CLEAR. LOWS 37-53. HIGHS 66-79. SOUTHWEST WINDS  
10 TO 20 MPH.    
TUESDAY
 
PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS 33-52.  
HIGHS 54-72. WEST WINDS 5 TO 15 MPH.    
WEDNESDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS  
33-49. HIGHS 66-79. NORTH WINDS 5 TO 15 MPH.    
THURSDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS  
35-53. HIGHS 67-80.    
FRIDAY
 
COOLER. PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS.  
LOWS 37-53. HIGHS 55-72.  
 

 
 
AZZ131-CAZ231-252315-  
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-  
LOWER COLORADO RIVER VALLEY CA-  
406 AM MST SAT MAR 25 2017 /406 AM PDT SAT MAR 25 2017/  
   
TODAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY.  
* MAX TEMPERATURE.................79-83.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................20-25 PCT.  
* 24 HR TREND..................6 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 OR LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR YUMA..........9300 FT AGL.  
* TRANSPORT WIND FOR YUMA.........WEST 18 KNOTS.  
* DISPERSION FOR YUMA.............EXCELLENT.  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................54-58.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................53-59 PCT.  
* 24 HR TREND..................6 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................80-84.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................17-22 PCT.  
* 24 HR TREND..................3 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 OR LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR YUMA..........7400 FT AGL.  
* TRANSPORT WIND FOR YUMA.........WEST 3 KNOTS.  
* DISPERSION FOR YUMA.............FAIR.  
 
   
EXTENDED
 
   
MONDAY
 
MOSTLY CLEAR. LOWS 56-60. HIGHS 80-84. WEST WINDS 15 TO  
25 MPH.    
TUESDAY
 
MOSTLY CLEAR. LOWS 53-58. HIGHS 76-80. NORTHWEST WINDS  
15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 53-57. HIGHS 81-85. NORTH WINDS  
15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 54-59. HIGHS 82-86.    
FRIDAY
 
MOSTLY CLEAR. LOWS 54-59. HIGHS 79-83.  
 

 
 
CAZ230-252315-  
JOSHUA TREE NATIONAL PARK-  
406 AM PDT SAT MAR 25 2017  
   
TODAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF  
SHOWERS.  
* MAX TEMPERATURE.................62-78.  
* 24 HR TREND..................3 DEGREES COOLER.  
* MIN HUMIDITY....................18-35 PCT.  
* 24 HR TREND..................12 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH IN THE MORNING  
BECOMING NORTHWEST 5 TO 15 MPH IN THE AFTERNOON.  
* CHANCE OF PRECIP................10 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........3 OR VERY LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................43-52.  
* 24 HR TREND..................3 DEGREES COOLER.  
* MAX HUMIDITY....................43-57 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 10 TO 15 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................68-81.  
* 24 HR TREND..................4 DEGREES WARMER.  
* MIN HUMIDITY....................16-25 PCT.  
* 24 HR TREND..................6 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........3 OR VERY LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
MONDAY
 
MOSTLY CLEAR. LOWS 42-54. HIGHS 64-79. NORTHWEST WINDS  
15 TO 25 MPH.    
TUESDAY
 
BREEZY. MOSTLY CLEAR. LOWS 42-53. HIGHS 64-76.  
NORTHWEST WINDS 20 TO 30 MPH. MINIMUM RELATIVE HUMIDITY MAY BE  
LOWER THAN 15 PERCENT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 42-53. HIGHS 71-82. NORTHWEST  
WINDS 15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 43-55. HIGHS 72-83.    
FRIDAY
 
MOSTLY CLEAR. LOWS 44-55. HIGHS 63-79.  
 

 
 
CAZ232-252315-  
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-  
406 AM PDT SAT MAR 25 2017  
   
TODAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY.  
* MAX TEMPERATURE.................75-83.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................19-27 PCT.  
* 24 HR TREND..................7 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 OR LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................52-57.  
* 24 HR TREND..................3 DEGREES COOLER.  
* MAX HUMIDITY....................48-64 PCT.  
* 24 HR TREND..................4 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................78-84.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................16-22 PCT.  
* 24 HR TREND..................4 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........3 OR VERY LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
MONDAY
 
MOSTLY CLEAR. LOWS 52-59. HIGHS 77-84. WEST WINDS 15 TO  
25 MPH.    
TUESDAY
 
MOSTLY CLEAR. LOWS 51-58. HIGHS 75-83. NORTHWEST WINDS  
15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 51-56. HIGHS 80-87. NORTHWEST  
WINDS 15 TO 25 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 52-59. HIGHS 81-88.    
FRIDAY
 
MOSTLY CLEAR. LOWS 53-59. HIGHS 76-83.  
 

 
   
8 TO 10 DAY OUTLOOK
 
SATURDAY APRIL 1ST THROUGH MONDAY APRIL  
3RD: ABOVE TO NEAR NORMAL TEMPERATURES, ABOVE MEDIAN  
PRECIPITATION ACROSS ARIZONA AND BELOW MEDIAN PRECIPITATION FOR  
SOUTHERN CALIFORNIA.  
 
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