755  
FNUS55 KPSR 272127  
FWFPSR  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL  
ARIZONA AND SOUTHEAST CALIFORNIA  
NATIONAL WEATHER SERVICE PHOENIX AZ  
227 PM MST THU APR 27 2017  
   
..RED FLAG WARNING IN EFFECT FRIDAY DUE TO STRONG WINDS
 
LOW  
RELATIVE HUMIDITY AND HIGH TO VERY HIGH FIRE DANGER...  
   
DISCUSSION
 
 
VERY DANGEROUS CRITICAL FIRE WEATHER CONDITIONS WILL EXIST FRIDAY  
FOR MOST DISTRICTS AS STRONG GUSTY WEST WINDS DEVELOP OVER THE  
AREA. THIS WILL BE IN CONCERT WITH HUMIDITY LEVELS BELOW 15% BY  
LATE AFTERNOON. IN ADDITION, SCATTERED THUNDERSTORMS ARE POSSIBLE  
OVER SOUTHERN GILA COUNTY WHERE WETTING RAIN COULD BE VERY  
LIMITED. THEREFORE, A FEW LIGHTNING STRIKES COULD CONCEIVABLY  
INITIATE NEW FIRE STARTS IF RAINFALL IS MINIMAL.  
   
..THUNDERSTORMS IMPLY GUSTY WINDS
 
 
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND  
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.  
 
AZZ132-280930-  
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-  
227 PM MST THU APR 27 2017  
   
..RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MST FRIDAY
 
 
   
TONIGHT
 
 
* SKY/WEATHER.....................PARTLY CLOUDY.  
* MIN TEMPERATURE.................61-71.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................32-50 PCT.  
* 24 HR TREND..................8 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.  
   
FRIDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................79-87.  
* 24 HR TREND..................6 DEGREES COOLER.  
* MIN HUMIDITY....................6-11 PCT.  
* 24 HR TREND..................8 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.  
* WINDS...10000 FT MSL............WEST 30 TO 40 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.......9900 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......WEST 21 KNOTS.  
* DISPERSION FOR PHOENIX..........EXCELLENT.  
   
FRIDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................53-63.  
* 24 HR TREND..................8 DEGREES COOLER.  
* MAX HUMIDITY....................20-29 PCT.  
* 24 HR TREND..................17 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 35 TO 45 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
SATURDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................77-83.  
* 24 HR TREND..................4 DEGREES COOLER.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 20 TO 30 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.......10300 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......NORTHWEST 12 KNOTS.  
* DISPERSION FOR PHOENIX..........EXCELLENT.  
 
   
EXTENDED
 
   
SUNDAY
 
CLEAR. LOWS 52-62. HIGHS 83-89. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
MONDAY
 
CLEAR. LOWS 55-65. HIGHS 89-94. WEST WINDS 5 TO 15 MPH.  
MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
TUESDAY
 
CLEAR. LOWS 60-70. HIGHS 90-95. SOUTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 62-72. HIGHS 92-97.    
THURSDAY
 
CLEAR. LOWS 62-72. HIGHS 94-99.  
 

 
 
AZZ133-280930-  
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-  
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/  
CAZ-  
227 PM MST THU APR 27 2017  
   
..RED FLAG WARNING IN EFFECT FROM 3 PM TO 9 PM MST FRIDAY
 
 
   
TONIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR.  
* MIN TEMPERATURE.................47-62.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................47-65 PCT.  
* 24 HR TREND..................19 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
FRIDAY
 
 
* SKY/WEATHER.....................PARTLY SUNNY. SLIGHT CHANCE OF  
SHOWERS . SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.  
* MAX TEMPERATURE.................67-83.  
* 24 HR TREND..................6 DEGREES COOLER.  
* MIN HUMIDITY....................8-17 PCT.  
* 24 HR TREND..................7 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..WEST 5 TO 15 MPH IN THE MORNING  
BECOMING 15 TO 25 MPH IN THE AFTERNOON.  
* WINDS...10000 FT MSL............WEST 25 TO 35 MPH IN THE MORNING  
BECOMING 35 TO 45 MPH IN THE AFTERNOON.  
* CHANCE OF PRECIP................20 PERCENT.  
* LAL.............................1 IN THE MORNING BECOMING 2 IN  
THE AFTERNOON.  
* HAINES HIGH LEVEL INDEX.........3 OR VERY LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
FRIDAY NIGHT
 
 
* SKY/WEATHER.....................MOSTLY CLEAR. SLIGHT CHANCE OF  
SHOWERS IN THE EVENING.  
* MIN TEMPERATURE.................38-52.  
* 24 HR TREND..................9 DEGREES COOLER.  
* MAX HUMIDITY....................29-44 PCT.  
* 24 HR TREND..................20 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH IN THE  
EVENING BECOMING NORTH 5 TO 10 MPH AFTER MIDNIGHT.  
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH IN THE  
EVENING BECOMING 10 TO 20 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
SATURDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................60-78.  
* 24 HR TREND..................6 DEGREES COOLER.  
* MIN HUMIDITY....................10-15 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 OR LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
SUNDAY
 
CLEAR. LOWS 34-56. HIGHS 69-84. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
MONDAY
 
CLEAR. LOWS 38-61. HIGHS 74-89. WEST WINDS 5 TO 15 MPH.  
MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
TUESDAY
 
CLEAR. LOWS 46-63. HIGHS 77-91. WEST WINDS 10 TO  
20 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS 47-63. HIGHS 79-92.    
THURSDAY
 
CLEAR. LOWS 48-64. HIGHS 82-95.  
 

 
 
AZZ131-CAZ231-280930-  
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-  
LOWER COLORADO RIVER VALLEY CA-  
227 PM MST THU APR 27 2017 /227 PM PDT THU APR 27 2017/  
 
...RED FLAG WARNING IN EFFECT FROM 9 AM MST /9 AM PDT/ TO 4 PM  
MST /4 PM PDT/ FRIDAY...  
   
TONIGHT
 
 
* SKY/WEATHER.....................PARTLY CLOUDY.  
* MIN TEMPERATURE.................64-68.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................28-45 PCT.  
* 24 HR TREND..................7 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............WEST 15 TO 25 MPH IN THE EVENING  
BECOMING 25 TO 35 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
FRIDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY. PATCHY BLOWING DUST  
IN THE AFTERNOON.  
* MAX TEMPERATURE.................82-87.  
* 24 HR TREND..................8 DEGREES COOLER.  
* MIN HUMIDITY....................6-11 PCT.  
* 24 HR TREND..................8 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 30 TO 40 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..........7500 FT AGL.  
* TRANSPORT WIND FOR YUMA.........NORTH 17 KNOTS.  
* DISPERSION FOR YUMA.............EXCELLENT.  
   
FRIDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................59-63.  
* 24 HR TREND..................5 DEGREES COOLER.  
* MAX HUMIDITY....................19-25 PCT.  
* 24 HR TREND..................14 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 35 TO 45 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SATURDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................81-85.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................6-11 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTH 30 TO 40 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..........7500 FT AGL.  
* TRANSPORT WIND FOR YUMA.........NORTH 11 KNOTS.  
* DISPERSION FOR YUMA.............VERY GOOD.  
 
   
EXTENDED
 
   
SUNDAY
 
CLEAR. LOWS 56-61. HIGHS 87-91. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
MONDAY
 
CLEAR. LOWS 59-67. HIGHS 91-95. WEST WINDS 5 TO 10 MPH.  
MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
TUESDAY
 
CLEAR. LOWS 64-68. HIGHS 91-95. WEST WINDS 5 TO  
10 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 65-69. HIGHS 94-98.    
THURSDAY
 
CLEAR. LOWS 65-69. HIGHS 96-100.  
 

 
 
CAZ230-280930-  
JOSHUA TREE NATIONAL PARK-  
227 PM PDT THU APR 27 2017  
   
TONIGHT
 
 
* SKY/WEATHER.....................PARTLY CLOUDY.  
* MIN TEMPERATURE.................52-61.  
* 24 HR TREND..................5 DEGREES COOLER.  
* MAX HUMIDITY....................30-44 PCT.  
* 24 HR TREND..................5 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 10 TO 20 MPH.  
* WINDS...10000 FT MSL............WEST 10 TO 20 MPH IN THE EVENING  
BECOMING 20 TO 30 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
FRIDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................68-81.  
* 24 HR TREND..................8 DEGREES COOLER.  
* MIN HUMIDITY....................8-14 PCT.  
* 24 HR TREND..................6 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............WEST 25 TO 35 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.  
   
FRIDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................45-56.  
* 24 HR TREND..................5 DEGREES COOLER.  
* MAX HUMIDITY....................18-26 PCT.  
* 24 HR TREND..................14 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 25 TO 35 MPH IN THE  
EVENING BECOMING 35 TO 45 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SATURDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................66-80.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTH 40 TO 50 MPH IN THE MORNING  
BECOMING 30 TO 40 MPH IN THE AFTERNOON.  
* 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.  
 
   
EXTENDED
 
   
SUNDAY
 
CLEAR. LOWS 47-59. HIGHS 74-86. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
MONDAY
 
CLEAR. LOWS 51-63. HIGHS 77-90. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
TUESDAY
 
CLEAR. LOWS 56-64. HIGHS 77-91. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 57-64. HIGHS 78-92.    
THURSDAY
 
CLEAR. LOWS 56-64. HIGHS 80-94.  
 

 
 
CAZ232-280930-  
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-  
227 PM PDT THU APR 27 2017  
   
TONIGHT
 
 
* SKY/WEATHER.....................PARTLY CLOUDY.  
* MIN TEMPERATURE.................61-69.  
* 24 HR TREND..................3 DEGREES COOLER.  
* MAX HUMIDITY....................29-47 PCT.  
* 24 HR TREND..................6 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHWEST 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.  
   
FRIDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................80-88.  
* 24 HR TREND..................7 DEGREES COOLER.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................7 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 25 TO 35 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.  
   
FRIDAY NIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................57-63.  
* 24 HR TREND..................5 DEGREES COOLER.  
* MAX HUMIDITY....................18-29 PCT.  
* 24 HR TREND..................15 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 30 TO 40 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
SATURDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................79-86.  
* 24 HR TREND..................LITTLE CHANGE.  
* MIN HUMIDITY....................6-11 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTH 35 TO 45 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.  
 
   
EXTENDED
 
   
SUNDAY
 
CLEAR. LOWS 55-61. HIGHS 85-91. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
MONDAY
 
CLEAR. LOWS 58-67. HIGHS 88-95. WEST WINDS 5 TO 10 MPH.  
MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
TUESDAY
 
CLEAR. LOWS 63-67. HIGHS 88-95. NORTHWEST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
CLEAR. LOWS 63-70. HIGHS 90-97.    
THURSDAY
 
CLEAR. LOWS 63-70. HIGHS 92-99.  
 

 
   
8 TO 10 DAY OUTLOOK
 
FRIDAY MAY 5TH THROUGH SUNDAY MAY 7TH:  
ABOVE NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.  
 
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