437  
FNUS55 KPSR 172126  
FWFPSR  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL  
ARIZONA AND SOUTHEAST CALIFORNIA  
NATIONAL WEATHER SERVICE PHOENIX AZ  
226 PM MST SAT AUG 17 2019  
   
DISCUSSION
 
 
CONTINUED DRY FLOW ALOFT WILL KEEP SKIES MOSTLY CLEAR AND  
ELIMINATE ANY POTENTIAL FOR MONSOON THUNDERSTORMS, EVEN ACROSS THE  
HIGHER TERRAIN. TEMPERATURES TODAY THROUGH MONDAY WILL STAY A FEW  
DEGREES ABOVE NORMAL AROUND 105-110 DEGREES. MINIMUM HUMIDITY  
VALUES WILL BE ON THE DECREASE THROUGH MONDAY BUT REMAIN ABOVE  
20-25 PERCENT. IN GENERAL, WINDS WILL BE ON THE LIGHT SIDE,  
FAVORING THE SOUTH TO SOUTHWEST OVER THE WESTERN DESERTS, AND THE  
SOUTHWEST TO WEST OVER THE CENTRAL ARIZONA DESERTS. LOOK FOR  
TYPICAL AFTERNOON AND EARLY EVENING GUSTINESS ACROSS THE LOWER  
ELEVATIONS.  
   
..THUNDERSTORMS IMPLY GUSTY WINDS
 
 
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND  
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.  
 
AZZ132-180930-  
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-  
226 PM MST SAT AUG 17 2019  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................75-85.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................31-50 PCT.  
* 24 HR TREND..................13 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY.  
* MAX TEMPERATURE.................102-107.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................11-16 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE  
MORNING BECOMING SOUTH IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 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.......10100 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......SOUTHWEST 7 KNOTS.  
* DISPERSION FOR PHOENIX..........VERY GOOD.  
   
SUNDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................75-85.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................25-42 PCT.  
* 24 HR TREND..................7 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 10 MPH IN THE  
EVENING BECOMING SOUTH AFTER MIDNIGHT.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................104-109.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................8-13 PCT.  
* 24 HR TREND..................3 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE  
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 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.......10900 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......WEST 4 KNOTS.  
* DISPERSION FOR PHOENIX..........GOOD.  
 
   
EXTENDED
 
   
TUESDAY
 
CLEAR. LOWS 77-87. HIGHS 108-113. NORTHWEST WINDS 5 TO  
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 80-90. HIGHS 110-115. WEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
THURSDAY
 
MOSTLY CLEAR. LOWS 80-90. HIGHS 105-110. SOUTH WINDS  
5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS 78-88. HIGHS 100-106.    
SATURDAY
 
MOSTLY CLEAR. LOWS 77-87. HIGHS 98-104.  
 

 
 
AZZ131-CAZ231-180930-  
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-  
LOWER COLORADO RIVER VALLEY CA-  
226 PM MST SAT AUG 17 2019 /226 PM PDT SAT AUG 17 2019/  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................75-80.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................30-56 PCT.  
* 24 HR TREND..................10 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................104-108.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................10-15 PCT.  
* 24 HR TREND..................4 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR YUMA..........6900 FT AGL.  
* TRANSPORT WIND FOR YUMA.........SOUTH 7 KNOTS.  
* DISPERSION FOR YUMA.............GOOD.  
   
SUNDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................76-80.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................28-58 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................106-110.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................8-13 PCT.  
* 24 HR TREND..................3 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING  
BECOMING SOUTHWEST IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH IN THE  
MORNING BECOMING 10 TO 20 MPH IN THE AFTERNOON.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR YUMA..........6400 FT AGL.  
* TRANSPORT WIND FOR YUMA.........SOUTHWEST 6 KNOTS.  
* DISPERSION FOR YUMA.............FAIR.  
 
   
EXTENDED
 
   
TUESDAY
 
CLEAR. LOWS 78-85. HIGHS 110-114. NORTHWEST WINDS 5 TO  
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 80-86. HIGHS 112-116. WEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
THURSDAY
 
CLEAR. LOWS 81-86. HIGHS 107-112. SOUTH WINDS 5 TO  
15 MPH.    
FRIDAY
 
CLEAR. LOWS 80-86. HIGHS 104-108.    
SATURDAY
 
CLEAR. LOWS 79-85. HIGHS 102-106.  
 

 
 
AZZ133-180930-  
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-  
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/  
CAZ-  
226 PM MST SAT AUG 17 2019  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................61-78.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................32-53 PCT.  
* 24 HR TREND..................12 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 15 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY.  
* MAX TEMPERATURE.................89-104.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................11-17 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 10 MPH IN THE  
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
SUNDAY NIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................61-79.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................25-44 PCT.  
* 24 HR TREND..................7 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 10 MPH IN THE EVENING  
BECOMING NORTHEAST AFTER MIDNIGHT.  
* WINDS...10000 FT MSL............SOUTHWEST 5 TO 15 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................91-106.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................10-15 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 10 MPH IN THE  
MORNING BECOMING WEST IN THE AFTERNOON.  
* WINDS...10000 FT MSL............WEST 5 TO 15 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 OR LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
TUESDAY
 
CLEAR. LOWS 63-83. HIGHS 94-110. NORTH WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS 65-83. HIGHS 93-110. SOUTHEAST WINDS 5 TO  
15 MPH.    
THURSDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS 63-83. HIGHS 90-107. SOUTH WINDS 5 TO 15 MPH.   
FRIDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS 62-81. HIGHS 86-101.    
SATURDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS AND  
THUNDERSTORMS. LOWS 61-80. HIGHS 84-99.  
 

 
 
CAZ232-180930-  
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-  
226 PM PDT SAT AUG 17 2019  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................73-79.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................20-45 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................99-108.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................7-13 PCT.  
* 24 HR TREND..................3 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
SUNDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................74-81.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................20-45 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................101-110.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE  
MORNING BECOMING SOUTHWEST IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
TUESDAY
 
CLEAR. LOWS 77-86. HIGHS 104-113. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 79-86. HIGHS 106-116. WEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
THURSDAY
 
CLEAR. LOWS 80-86. HIGHS 104-112. SOUTH WINDS 5 TO  
15 MPH.    
FRIDAY
 
CLEAR. LOWS 79-86. HIGHS 100-109.    
SATURDAY
 
CLEAR. LOWS 78-85. HIGHS 98-107.  
 

 
 
CAZ230-180930-  
JOSHUA TREE NATIONAL PARK-  
226 PM PDT SAT AUG 17 2019  
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................62-74.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................19-27 PCT.  
* 24 HR TREND..................4 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTH 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SUNDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................87-102.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................8-13 PCT.  
* 24 HR TREND..................3 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 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.  
   
SUNDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................62-75.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................20-29 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............SOUTHWEST 10 TO 20 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................90-104.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................8-13 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 10 MPH IN THE  
MORNING BECOMING SOUTH 5 TO 15 MPH IN THE AFTERNOON.  
* WINDS...10000 FT MSL............SOUTHWEST 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 OR MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
TUESDAY
 
CLEAR. LOWS 65-80. HIGHS 93-107. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 69-82. HIGHS 96-110. WEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
THURSDAY
 
CLEAR. LOWS 68-82. HIGHS 94-107. SOUTHWEST WINDS  
10 TO 20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
FRIDAY
 
CLEAR. LOWS 67-81. HIGHS 90-104.    
SATURDAY
 
CLEAR. LOWS 67-79. HIGHS 90-103.  
 

 
   
8 TO 10 DAY OUTLOOK
 
SUNDAY AUGUST 25TH THROUGH TUESDAY AUGUST  
27TH: ABOVE NORMAL TEMPERATURES AND ABOVE MEDIAN PRECIPITATION.  
 
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