522  
FNUS75 KREV 201253  
FWSREV  
 
SPOT FORECAST FOR ALPINE COUNTY FUELS MITIGATION PROGRAM...ALPINE COUNTY  
NATIONAL WEATHER SERVICE RENO NV  
553 AM PDT TUE MAY 20 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON MAY 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL  
WEATHER SERVICE IN RENO.  
   
DISCUSSION
 
 
* WARMING AND DRYING TREND CONTINUES OVER THE NEXT FEW DAYS.  
 
* TYPICAL AFTERNOON WESTERLY WINDS CONTINUE THROUGH WEDNESDAY.  
 
* SLIGHTLY COOLER TEMPERATURES ON THURSDAY AND FRIDAY WITH BREEZY  
WEST-SOUTHWESTERLY WINDS GUSTING UP TO 20-30 MPH IN THE  
AFTERNOON.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY.  
TEMPERATURE.........43 AT IGNITION...MAX 72-75.  
RH..................47% AT IGNITION...MIN 14-17%.  
20-FOOT WINDS.......UPSLOPE 3-7 MPH BECOMING WEST 5-10 MPH WITH GUSTS  
UP TO 15 MPH LATE IN THE AFTERNOON.  
CHC WETTING RAIN....0%.  
CHANCE OF THUNDER...0%.  
MIXING HEIGHT.......7900-8900 FT AGL.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING WEST 10-15 MPH IN THE LATE  
MORNING AND AFTERNOON.  
VENTILATION.........MARGINAL INCREASING TO EXCELLENT LATE IN THE  
MORNING.  
 
TIME (PDT) 7 AM 9 AM 11 AM 1 PM 3 PM  
SKY (%).........4 4 3 3 2  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0 0  
CHC OF THDR (%).0 0 0 0 0  
TEMP............43 58 66 71 73  
RH..............47 26 17 14 15  
20 FT WIND......SW 3 SW 2 W 6 W 6 W 9  
20 FT WIND GUST.5 5 10 10 15  
MX HT MSL (KFT).1.5 5.0 8.4 8.4 9.0  
TRANSPORT WIND..SW 5 W 10 W 15 W 15 W 15  
VRATE KT-FT/1K..9 45 109 109 117  
VENTRATE CAT....POOR GOOD EXNT EXNT EXNT  
   
TONIGHT
 
 
SKY/WEATHER.........CLEAR.  
TEMPERATURE.........MIN 43-48.  
RH..................MAX 43-47%.  
20-FOOT WINDS.......WEST WINDS 7-9 MPH EARLY IN THE EVENING  
BECOMING LIGHT.  
CHC WETTING RAIN....0%.  
CHANCE OF THUNDER...0%.  
MIXING HEIGHT.......1600-2600 FT AGL.  
TRANSPORT WINDS.....WEST 10-15 MPH IN THE EVENING BECOMING LIGHT.  
VENTILATION.........VERY GOOD TO POOR.  
 
TIME (PDT) 5 PM 7 PM 9 PM 11 PM 1 AM 3 AM  
SKY (%).........8 8 18 19 19 4  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0 0 0  
CHC OF THDR (%).0 0 0 0 0 0  
TEMP............72 68 57 51 49 45  
RH..............16 23 36 40 40 43  
20 FT WIND......W 9 W 9 SW 5 SW 3 SW 3 W 3  
20 FT WIND GUST.15 15 10 5 5 5  
MX HT MSL (KFT).6.9 6.9 1.6 1.5 1.5 1.5  
TRANSPORT WIND..W 15 W 15 W 10 W 5 W 5 SW 5  
VRATE KT-FT/1K..76 76 13 8 7 7  
VENTRATE CAT....VYGD VYGD MRGL MRGL POOR POOR  
   
WEDNESDAY
 
 
SKY/WEATHER.........SUNNY.  
TEMPERATURE.........MAX 74-78.  
RH..................MIN 12-15%.  
20-FOOT WINDS.......UPSLOPE 3-7 MPH BECOMING WEST 5-10 MPH WITH GUSTS UP TO 15 MPH  
LATE IN THE AFTERNOON.  
CHC WETTING RAIN....0%.  
CHANCE OF THUNDER...0%.  
MIXING HEIGHT.......7800-8800 FT AGL.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING WEST 10-15 MPH IN THE  
AFTERNOON.  
VENTILATION.........POOR TO EXCELLENT.  
 
TIME (PDT) 5 AM 7 AM 9 AM 11 AM 1 PM 3 PM  
SKY (%).........5 5 4 3 3 2  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0 0 0  
CHC OF THDR (%).0 0 0 0 0 0  
TEMP............43 47 56 69 75 77  
RH..............39 36 24 17 14 12  
20 FT WIND......SW 3 SW 3 SE 1 NE 2 NE 2 W 8  
20 FT WIND GUST.5 5 5 5 11  
MX HT MSL (KFT).1.5 1.5 3.3 6.0 6.0 9.2  
TRANSPORT WIND..S 5 S 5 SW 5 W 10 W 10 W 15  
VRATE KT-FT/1K..7 7 17 54 54 102  
VENTRATE CAT....POOR POOR MRGL GOOD GOOD EXNT  
 

 
FORECASTER...CRESPO  
REQUESTED BY...JEFF BREES  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2513867.3/REV  
.DELDT 05/20/25  
.FORMATTERVERSION 2.0.0  
.EMAIL JEFFBREES@YAHOO.COM,JLAMB@ALPINECOUNTYCA.GOV  
 
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