178  
FNUS75 KREV 161021  
FWSREV  
 
SPOT FORECAST FOR DITCH CAMP RX...CAL FIRE/LMU  
NATIONAL WEATHER SERVICE RENO NV  
321 AM PDT TUE SEP 16 2025  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON SEPTEMBER 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL  
WEATHER SERVICE IN RENO.  
   
DISCUSSION  
 
* WARMING AND DRYING CONDITIONS ARE EXPECTED THROUGH AT LEAST  
THURSDAY WITH LIGHT WINDS.  
 
* MODERATE RELATIVE HUMIDITY RECOVERIES ARE EXPECTED AT NIGHT WITH  
AFTERNOON HUMIDITY DROPPING TO NEAR 15% TODAY AND THURSDAY.  
 
* COOLER TEMPERATURES AND CHANCES FOR SHOWERS RETURN BY FRIDAY,  
WITH ISOLATED THUNDERSTORMS ALSO POSSIBLE.  
   
WEDNESDAY  
 
SKY/WEATHER.........SUNNY.  
TEMPERATURE.........47-50 AT IGNITION...MAX 83-86.  
RH..................52-56% AT IGNITION...MIN 15-18%.  
20-FOOT WINDS.......WINDS SOUTHEAST 4-8 MPH BECOMING WEST AFTER  
3 PM.  
CHC WETTING RAIN....0%.  
CHANCE OF THUNDER...0%.  
MIXING HEIGHT.......700-1000 FT AGL IN THE MORNING INCREASING TO  
7100-8100 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....LIGHT WINDS.  
VENTILATION.........POOR IN THE MORNING THEN GOOD.  
 
TIME (PDT) 7 AM 10 AM 1 PM 4 PM  
SKY (%).........8 4 0 2  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0  
CHC OF THDR (%).0 0 0 0  
TEMP............49 67 82 86  
RH..............52 29 18 16  
20 FT WIND......SE 6G10 E 5 S 3G5 W 6G10  
MX HT MSL (KFT).0.7 1.1 4.4 8.6  
TRANSPORT WIND..SE 5 SE 5 S 5 SW 5  
VRATE KT-FT/1K..3 4 26 52  
VENTRATE CAT....POOR POOR FAIR GOOD  
   
WEDNESDAY NIGHT  
 
SKY/WEATHER.........CLEAR.  
TEMPERATURE.........MIN 47-49.  
RH..................MAX 44-47%.  
20-FOOT WINDS.......WEST WINDS 7-10 MPH WITH GUSTS TO 15 MPH IN  
THE EVENING BECOMING EAST 3-7 MPH OVERNIGHT.  
CHC WETTING RAIN....0%.  
CHANCE OF THUNDER...0%.  
MIXING HEIGHT.......800-1300 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 10 MPH IN THE EVENING BECOMING  
LIGHT.  
VENTILATION.........GOOD IN THE EVENING THEN POOR.  
 
TIME (PDT) 5 PM 8 PM 11 PM 2 AM  
SKY (%).........4 7 8 11  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0  
CHC OF THDR (%).0 0 0 0  
TEMP............85 75 63 55  
RH..............17 26 33 38  
20 FT WIND......W 8G15 W 2G5 SE 6G10 E 6G10  
MX HT MSL (KFT).8.1 0.6 0.7 0.7  
TRANSPORT WIND..W 10 W 10 SE 5 E 5  
VRATE KT-FT/1K..56 4 4 3  
VENTRATE CAT....GOOD POOR POOR POOR  
   
THURSDAY  
 
SKY/WEATHER.........PARTLY CLOUDY.  
TEMPERATURE.........MAX 82-85.  
RH..................MIN 14-17%.  
20-FOOT WINDS.......EAST 3-7 MPH BECOMING SOUTH 7-10 MPH WITH GUSTS  
TO 15 MPH IN THE AFTERNOON.  
CHC WETTING RAIN....0%.  
CHANCE OF THUNDER...5%.  
MIXING HEIGHT.......600-800 FT AGL EARLY IN THE MORNING INCREASING  
TO 10500-11500 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH AROUND 10 MPH LATE  
IN THE AFTERNOON.  
VENTILATION.........POOR IN THE MORNING INCREASING TO EXCELLENT IN  
THE AFTERNOON.  
 
TIME (PDT) 5 AM 8 AM 11 AM 2 PM  
SKY (%).........31 27 32 31  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE  
TSTM COV........  
CWR.............0 0 0 0  
CHC OF THDR (%).0 0 10 10  
TEMP............49 52 74 83  
RH..............45 44 20 15  
20 FT WIND......E 5 E 5 SE 6G10 S 8G15  
MX HT MSL (KFT).0.7 0.4 4.9 12  
TRANSPORT WIND..SE 5 SE 5 S 5 S 10  
VRATE KT-FT/1K..4 3 29 111  
VENTRATE CAT....POOR POOR FAIR EXNT  
 
 
FORECASTER...JOHNSTON/DEUTSCHENDORF  
REQUESTED BY...LARRY TURMAN  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2521947.0/REV  
.DELDT 09/16/25  
.FORMATTERVERSION 2.0.0  
.EMAIL LARRY.TURMAN@FIRE.CA.GOV  
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