495  
FNUS75 KRIW 171344  
FWSRIW  
 
SPOT FORECAST FOR PINEDALE TRAIL CREW...USFS BTF  
NATIONAL WEATHER SERVICE RIVERTON WY  
744 AM MDT SUN JUN 17 2018  
 
FORECAST IS BASED ON FORECAST START TIME OF 0800 MDT ON JUNE 17.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
   
..INCREASING HEAVY RAINS POSSIBLE THROUGH MONDAY
 
 
AN INCOMING PACIFIC LOW PRESSURE TROUGH DIGGING INTO THE PACIFIC  
NORTHWEST WILL DEEPEN AND STALL OUT OVER SOUTHERN IDAHO THROUGH  
MONDAY, INGESTING REMNANT MOISTURE FROM A PACIFIC HURRICANE. THIS  
PRODUCES RATHER EXCESSIVE PRECIPITATION AMOUNTS THROUGH MONDAY.  
 
COOLER TEMPERATURES WITH AREAS OF SHOWERS AND ISOLATED THUNDERSTORMS  
WILL BE OVER THE AREA. HEAVY RAIN WITH LOCAL FLOODING POSSIBLE.  
   
..THUNDERSTORMS IMPLY STRONG GUSTY AND ERRATIC WINDS
 
   
..HAINES INDEX IS HIGH LEVEL HAINES BOTH DAY AND NIGHT
 
 
FORECASTER...C.BAKER  
   
REST OF TODAY
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). SCATTERED THUNDERSTORMS  
IN THE MORNING. NUMEROUS RAIN SHOWERS THROUGH THE  
DAY. SCATTERED THUNDERSTORMS IN THE AFTERNOON.  
MAX TEMPERATURE.....61-64.  
MIN HUMIDITY........53-56 PERCENT.  
20-FOOT WINDS.......UPSLOPE/UPVALLEY 5-9 MPH BECOMING EAST AROUND  
10 MPH IN THE AFTERNOON. GUSTS UP TO 20 MPH.  
GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS.  
RIDGE TOP WINDS.....EAST AROUND 15 MPH.  
LAL.................4.  
CHC OF WETTING RAIN.51 PERCENT.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......1900 FT AGL UNTIL 1200, THEN 6200 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 14 MPH.  
SMOKE DISPERSAL.....FAIR TO EXCELLENT.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY (85-95 PERCENT). SCATTERED THUNDERSTORMS  
IN THE EVENING. NUMEROUS RAIN SHOWERS THROUGH  
THE NIGHT.  
MIN TEMPERATURE.....46-49.  
MAX HUMIDITY........92-95 PERCENT.  
20-FOOT WINDS.......EAST WINDS 8 TO 12 MPH WITH GUSTS TO AROUND 17  
MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS IN THE EVENING.  
RIDGE TOP WINDS.....EAST AROUND 15 MPH.  
LAL.................4.  
CHC OF WETTING RAIN.59 PERCENT.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3100 FT AGL UNTIL 2400, THEN 900 FT AGL.  
TRANSPORT WINDS.....EAST AROUND 15 MPH.  
SMOKE DISPERSAL.....POOR TO GOOD.  
   
MONDAY
 
 
SKY/WEATHER.........CLOUDY (80-90 PERCENT). SCATTERED RAIN SHOWERS  
THROUGH THE DAY. SCATTERED THUNDERSTORMS IN THE  
AFTERNOON.  
MAX TEMPERATURE.....62-65.  
MIN HUMIDITY........42-45 PERCENT.  
20-FOOT WINDS.......SOUTHEAST WINDS AROUND 10 MPH SHIFTING TO THE  
SOUTHWEST 10 TO 12 MPH IN THE AFTERNOON. GUSTS  
UP TO 22 MPH. GUSTY AND ERRATIC WINDS EXPECTED  
NEAR THUNDERSTORMS IN THE AFTERNOON.  
RIDGE TOP WINDS.....SOUTH AROUND 15 MPH.  
LAL.................4.  
CHC OF WETTING RAIN.20 PERCENT.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3000 FT AGL UNTIL 1200, THEN 8700 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 16 MPH.  
SMOKE DISPERSAL.....FAIR TO EXCELLENT.  
   
FORECAST DAYS 3 THROUGH 5
 
   
MONDAY NIGHT
 
 
MOSTLY CLOUDY. ISOLATED SHOWERS AND THUNDERSTORMS IN THE EVENING,  
THEN ISOLATED SHOWERS AFTER MIDNIGHT. LOWS IN THE LOWER 40S.  
WINDS GENERALLY LESS THAN 10 MPH.    
TUESDAY
 
 
MOSTLY CLOUDY WITH SCATTERED SHOWERS AND THUNDERSTORMS. LOWS IN  
THE LOWER 40S. HIGHS IN THE LOWER 60S. WINDS GENERALLY LESS THAN  
10 MPH.    
WEDNESDAY
 
 
MOSTLY CLOUDY. CHANCE OF SHOWERS AND SLIGHT CHANCE OF  
THUNDERSTORMS. LOWS IN THE LOWER 40S. HIGHS IN THE LOWER 60S.  
WINDS GENERALLY LESS THAN 10 MPH.    
THURSDAY
 
 
PARTLY CLOUDY. SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE  
AFTERNOON. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S. WINDS  
GENERALLY LESS THAN 10 MPH.  
 

 
FORECASTER...C.BAKER  
REQUESTED BY...TIDC  
TYPE OF REQUEST...OTHER  
.TAG 1811597.0/RIW  
.DELDT 06/17/18  
.EMAIL GRTE_DISPATCH@NPS.GOV  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab WY Page Main Text Page