272  
FNUS76 KMFR 142020  
FWSMFR  
 
SPOT FORECAST FOR WHITE ROCK RX...CAL FIRE  
NATIONAL WEATHER SERVICE MEDFORD OR  
120 PM PDT MON SEP 14 2026  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON SEPTEMBER 16.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION  
CURRENTLY, WE ARE SEEING A SIGNAL FOR POTENTIALLY  
BREEZY WIND SPEEDS LATE AFTERNOON/EARLY EVENING ON WEDNESDAY AS  
WIND SPEEDS EVENTUALLY TURN AND BECOME WESTERLY. SPEEDS AROUND  
10-15 MPH WILL BE POSSIBLE WITH GUSTS AROUND 20 MPH THROUGH EARLY  
EVENING. THERE WILL ALSO BE A CHANCE FOR THUNDERSTORMS WEDNESDAY  
AFTERNOON AND EARLY EVENING. IN ADDITION TO LIGHTNING BEING A  
THREAT, THERE COULD BE STRONG GUSTY AND ERRATIC WINDS ASSOCIATED  
WITH ANY POTENTIAL THUNDERSTORMS THAT DEVELOP. THUNDERSTORMS COULD  
LINGER INTO THURSDAY AS WELL.  
   
WEDNESDAY  
 
SKY/WEATHER.........SUNNY (15-25 PERCENT). SLIGHT CHANCE OF RAIN  
SHOWERS IN THE LATE MORNING AND AFTERNOON.  
SLIGHT CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON.  
CHANCE OF LIGHTNING.10 PERCENT.  
MAX TEMPERATURE.....AROUND 77.  
MIN HUMIDITY........29 PERCENT.  
EYE LEVEL WINDS.....LIGHT WINDS BECOMING NORTHEAST AROUND 7 MPH IN  
THE AFTERNOON AND THEN WESTERLY EARLY EVENING  
AROUND 10 MPH.  
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST AROUND 8 MPH IN  
THE AFTERNOON AND THEN WESTERLY EARLY EVENING  
AROUND 15 MPH GUSTING TO AROUND 20 MPH. GUSTY  
AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS  
IN THE AFTERNOON AND EVENING.  
MIXING HEIGHT.......7300 FT AGL.  
TRANSPORT WINDS.....NORTHEAST AROUND 7 MPH.  
CWR.................0 PERCENT.  
   
WEDNESDAY NIGHT  
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING  
MOSTLY CLEAR (0-10 PERCENT). SLIGHT CHANCE OF  
THUNDERSTORMS EARLY IN THE EVENING. SLIGHT  
CHANCE OF RAIN SHOWERS IN THE EVENING.  
CHANCE OF LIGHTNING.8 PERCENT.  
MIN TEMPERATURE.....AROUND 47.  
MAX HUMIDITY........69 PERCENT.  
EYE LEVEL WINDS.....NORTHWEST WINDS UP TO 3 MPH IN THE EVENING  
BECOMING LIGHT.  
WIND (20 FT)........NORTHWEST WINDS 5 TO 8 MPH IN THE EVENING  
BECOMING LIGHT. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS EARLY IN THE  
EVENING.  
MIXING HEIGHT.......300 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.  
CWR.................0 PERCENT.  
   
THURSDAY  
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
CHANCE OF LIGHTNING.6 PERCENT.  
MAX TEMPERATURE.....AROUND 79.  
MIN HUMIDITY........28 PERCENT.  
EYE LEVEL WINDS.....LIGHT WINDS.  
WIND (20 FT)........LIGHT WINDS.  
MIXING HEIGHT.......6800 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.  
CWR.................0 PERCENT.  
 
 
FORECASTER...GUERRERO  
REQUESTED BY...GREG PADILLA  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2621869.0/MFR  
.DELDT 09/14/26  
.FORMATTERVERSION 2.0.0  
.EMAIL GREGORY.PADILLA@FIRE.CA.GOV  
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