474  
FNUS55 KPSR 281313  
FWFPSR  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST AND SOUTH-CENTRAL  
ARIZONA AND SOUTHEAST CALIFORNIA  
NATIONAL WEATHER SERVICE PHOENIX AZ  
613 AM MST SUN FEB 28 2021  
 
...AREAS OF ELEVATED FIRE DANGER THROUGH THIS AFTERNOON DOWN THE  
COLORADO RIVER VALLEY AND ACROSS THE SOUTHWEST DESERTS...  
   
DISCUSSION
 
 
COOLER, DRY AND WINDY CONDITIONS ARE EXPECTED TODAY IN THE WAKE  
OF A COLD FRONT. OCCASIONAL GUSTS AS HIGH AS 35 MPH WILL BE  
POSSIBLE, PARTICULARLY ACROSS PORTIONS OF SOUTHEASTERN CALIFORNIA  
AND SOUTHWESTERN ARIZONA. CONSEQUENTLY, THERE WILL BE LOCALIZED  
AREAS OF ELEVATED FIRE DANGER AS FAR EAST AS MARICOPA COUNTY.  
CONDITIONS WILL IMPROVE MONDAY, THOUGH AREAS OF BREEZINESS WILL  
PERSIST.  
 
NOTE...ADDITIONAL FIRE WEATHER FORECAST INFORMATION CAN BE FOUND  
IN THE AREA FORECAST DISCUSSION. SEE PRODUCT PHXAFDPSR.  
 
AZZ132-010115-  
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-  
613 AM MST SUN FEB 28 2021  
   
REST OF TODAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................59-65.  
* 24 HR TREND..................8 DEGREES COOLER.  
* MIN HUMIDITY....................6-11 PCT.  
* 24 HR TREND..................3 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTH 40 TO 50 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR PHOENIX.......9800 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......NORTH 22 KNOTS.  
* DISPERSION FOR PHOENIX..........EXCELLENT.  
   
TONIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................34-44.  
* 24 HR TREND..................4 DEGREES COOLER.  
* MAX HUMIDITY....................16-27 PCT.  
* 24 HR TREND..................3 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 35 TO 45 MPH IN THE EVENING  
BECOMING 20 TO 30 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................66-72.  
* 24 HR TREND..................7 DEGREES WARMER.  
* MIN HUMIDITY....................9-14 PCT.  
* 24 HR TREND..................3 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE  
MORNING BECOMING EAST IN THE AFTERNOON.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR PHOENIX.......5300 FT AGL.  
* TRANSPORT WIND FOR PHOENIX......EAST 12 KNOTS.  
* DISPERSION FOR PHOENIX..........GOOD.  
 
   
EXTENDED
 
   
TUESDAY
 
MOSTLY CLEAR. LOWS 41-51. HIGHS 71-78. EAST WINDS 5 TO  
15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN 15 PERCENT.    
WEDNESDAY
 
PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS 42-52.  
HIGHS 66-74. SOUTH WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS  
42-52. HIGHS 67-72. NORTHWEST WINDS 5 TO 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS 44-58. HIGHS 76-82.    
SATURDAY
 
MOSTLY CLEAR. LOWS 50-60. HIGHS 78-84.  
 

 
 
AZZ131-CAZ231-010115-  
YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ-  
LOWER COLORADO RIVER VALLEY CA-  
613 AM MST SUN FEB 28 2021 /513 AM PST SUN FEB 28 2021/  
   
REST OF TODAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................63-67.  
* 24 HR TREND..................8 DEGREES COOLER.  
* 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.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR YUMA..........6000 FT AGL.  
* TRANSPORT WIND FOR YUMA.........NORTH 20 KNOTS.  
* DISPERSION FOR YUMA.............EXCELLENT.  
   
TONIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................35-43.  
* 24 HR TREND..................7 DEGREES COOLER.  
* MAX HUMIDITY....................20-31 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 25 TO 35 MPH IN THE EVENING  
BECOMING 15 TO 25 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................68-72.  
* 24 HR TREND..................6 DEGREES WARMER.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTHEAST 5 TO 15 MPH IN THE  
MORNING BECOMING LIGHT AND VARIABLE IN THE AFTERNOON.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
* MIXING HEIGHT FOR YUMA..........5700 FT AGL.  
* TRANSPORT WIND FOR YUMA.........NORTHEAST 8 KNOTS.  
* DISPERSION FOR YUMA.............GOOD.  
 
   
EXTENDED
 
   
TUESDAY
 
MOSTLY CLEAR. LOWS 39-48. HIGHS 74-78. NORTHEAST WINDS  
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
WEDNESDAY
 
MOSTLY CLEAR WITH SLIGHT CHANCE OF SHOWERS. LOWS  
42-48. HIGHS 67-72. SOUTH WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLEAR. LOWS 42-52. HIGHS 72-76. NORTHWEST  
WINDS 5 TO 10 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS 44-57. HIGHS 79-83.    
SATURDAY
 
MOSTLY CLEAR. LOWS 49-57. HIGHS 81-85.  
 

 
 
AZZ133-010115-  
SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS-  
SOUTHERN TONTO NF/WEST SAN CARLOS BIA/SOUTH PORTION FT APACHE BIA/  
CAZ-  
613 AM MST SUN FEB 28 2021  
   
REST OF TODAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................44-59.  
* 24 HR TREND..................10 DEGREES COOLER.  
* MIN HUMIDITY....................9-15 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 10 MPH IN THE MORNING  
BECOMING 10 TO 20 MPH IN THE AFTERNOON.  
* WINDS...10000 FT MSL............NORTHWEST 20 TO 30 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................26-38.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................25-44 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 40 TO 50 MPH IN THE EVENING  
BECOMING NORTHEAST 25 TO 35 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................54-68.  
* 24 HR TREND..................9 DEGREES WARMER.  
* MIN HUMIDITY....................12-18 PCT.  
* 24 HR TREND..................3 PCT WETTER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..EAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............EAST 15 TO 25 MPH.  
* CHANCE OF PRECIP................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
TUESDAY
 
WARMER. MOSTLY CLEAR. LOWS 30-48. HIGHS 59-74. EAST  
WINDS 5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
WEDNESDAY
 
PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS 34-48.  
HIGHS 60-72. SOUTH WINDS 10 TO 20 MPH.    
THURSDAY
 
PARTLY CLOUDY WITH CHANCE OF SHOWERS. LOWS 33-47.  
HIGHS 54-67. WEST WINDS 5 TO 15 MPH.    
FRIDAY
 
WARMER. MOSTLY CLEAR. LOWS 33-55. HIGHS 65-79.    
SATURDAY
 
MOSTLY CLEAR. LOWS 40-55. HIGHS 64-79.  
 

 
 
CAZ232-010115-  
IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY-  
513 AM PST SUN FEB 28 2021  
   
REST OF TODAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................58-68.  
* 24 HR TREND..................7 DEGREES COOLER.  
* MIN HUMIDITY....................8-13 PCT.  
* 24 HR TREND..................4 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTHWEST 35 TO 45 MPH IN THE  
MORNING BECOMING NORTH 25 TO 35 MPH IN THE AFTERNOON.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................37-46.  
* 24 HR TREND..................4 DEGREES COOLER.  
* MAX HUMIDITY....................17-35 PCT.  
* 24 HR TREND..................3 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH IN THE EVENING  
BECOMING NORTHEAST 5 TO 15 MPH AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................SUNNY.  
* MAX TEMPERATURE.................63-72.  
* 24 HR TREND..................5 DEGREES WARMER.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................LITTLE CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTHEAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............LIGHT AND VARIABLE.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
TUESDAY
 
MOSTLY CLEAR. LOWS 41-51. HIGHS 68-76. NORTH WINDS  
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS  
43-51. HIGHS 61-71. SOUTHWEST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLEAR. LOWS 43-55. HIGHS 68-76. NORTHWEST  
WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS 47-58. HIGHS 74-82.    
SATURDAY
 
MOSTLY CLEAR. LOWS 50-58. HIGHS 76-84.  
 

 
 
CAZ230-010115-  
JOSHUA TREE NATIONAL PARK-  
513 AM PST SUN FEB 28 2021  
   
REST OF TODAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................47-60.  
* 24 HR TREND..................7 DEGREES COOLER.  
* MIN HUMIDITY....................9-14 PCT.  
* 24 HR TREND..................5 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 10 TO 20 MPH.  
* WINDS...10000 FT MSL............NORTH 35 TO 45 MPH IN THE MORNING  
BECOMING 25 TO 35 MPH IN THE AFTERNOON.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........5 MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
TONIGHT
 
 
* SKY/WEATHER.....................CLEAR.  
* MIN TEMPERATURE.................31-40.  
* 24 HR TREND..................LITTLE CHANGE.  
* MAX HUMIDITY....................17-22 PCT.  
* 24 HR TREND..................6 PCT DRIER.  
* WINDS - 20 FOOT...SLOPE/VALLEY..NORTH 5 TO 15 MPH.  
* WINDS...10000 FT MSL............NORTH 15 TO 25 MPH IN THE EVENING  
BECOMING LIGHT AND VARIABLE AFTER MIDNIGHT.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
   
MONDAY
 
 
* SKY/WEATHER.....................MOSTLY SUNNY.  
* MAX TEMPERATURE.................53-66.  
* 24 HR TREND..................6 DEGREES WARMER.  
* MIN HUMIDITY....................7-12 PCT.  
* 24 HR TREND..................LITTLE RH CHANGE.  
* WINDS - 20 FOOT...SLOPE/VALLEY..SOUTHEAST 5 TO 15 MPH.  
* WINDS...10000 FT MSL............LIGHT AND VARIABLE IN THE MORNING  
BECOMING SOUTH 5 TO 15 MPH IN THE AFTERNOON.  
* CHANCE OF PRECIP................0 PERCENT.  
* CWR (>= 0.10 IN)................0 PERCENT.  
* LAL.............................1.  
* HAINES HIGH LEVEL INDEX.........4 LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 
   
EXTENDED
 
   
TUESDAY
 
MOSTLY CLEAR. LOWS 35-45. HIGHS 57-71. SOUTH WINDS  
5 TO 15 MPH. MINIMUM RELATIVE HUMIDITY MAY BE LOWER THAN  
15 PERCENT.    
WEDNESDAY
 
PARTLY CLOUDY WITH SLIGHT CHANCE OF SHOWERS. LOWS  
36-45. HIGHS 52-65. SOUTHWEST WINDS 5 TO 15 MPH.    
THURSDAY
 
MOSTLY CLEAR. LOWS 36-50. HIGHS 59-72. NORTHWEST  
WINDS 5 TO 15 MPH.    
FRIDAY
 
MOSTLY CLEAR. LOWS 42-53. HIGHS 64-77.    
SATURDAY
 
MOSTLY CLEAR. LOWS 42-53. HIGHS 65-79.  
 

 
   
8 TO 10 DAY OUTLOOK
 
SUNDAY MARCH 7TH THROUGH TUESDAY MARCH  
9TH:  
NEAR NORMAL TEMPERATURES AND NEAR MEDIAN PRECIPITATION.  
 
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