528  
FNUS75 KBOU 191707  
FWSBOU  
 
SPOT FORECAST FOR 2017 SNOW EVENT THUNDER LAKE...NPS  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
1107 AM MDT FRI MAY 19 2017  
 
FORECAST IS BASED ON INCIDENT TIME OF 1100 MDT ON MAY 19.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
SNOW SHOWERS ARE EXPECTED TO REDEVELOP THIS AFTERNOON. SOME  
OF THE SHOWERS COULD PRODUCE AN INCH OF SNOW IN AN HOUR, WITH A TOTAL  
ACCUMULATION OF 1 TO 3 INCHES THIS AFTERNOON. IF THERE IS SNOW TONIGHT,  
ACCUMULATION WILL BE AN INCH OR LESS. MOUNTAIN OBSCURATION WILL  
INCREASE IN THE SNOW SHOWERS THIS AFTERNOON, THEN DIMINISH THIS EVENING.  
MOUNTAINS WILL MOSTLY BE IN THE CLEAR ON SATURDAY, THOUGH SOME OBSCURATION  
IS POSSIBLE IN SHOWERS.  
   
REST OF TODAY
 
 
SKY/WEATHER.........CLOUDY. OCCASIONAL SNOW SHOWERS, MAINLY BETWEEN  
1200 AND 1700.  
MAX TEMPERATURE.....AROUND 26.  
MIN HUMIDITY........78%.  
SURFACE WINDS.......NORTHEAST WINDS 6-12 MPH.  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY UNTIL 0100, THEN MOSTLY CLOUDY. CHANCE OF  
SNOW SHOWERS UNTIL 0400, THEN SLIGHT CHANCE OF  
SNOW SHOWERS.  
MIN TEMPERATURE.....AROUND 18.  
MAX HUMIDITY........90-100%.  
SURFACE WINDS.......NORTHWEST WINDS 6-12 MPH WITH GUSTS TO 20 MPH.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY UNTIL 1300, THEN PARTLY CLOUDY(50-60%).  
SLIGHT CHANCE OF SNOW SHOWERS UNTIL 0800, THEN  
CHANCE OF SNOW SHOWERS.  
MAX TEMPERATURE.....AROUND 33.  
MIN HUMIDITY........72%.  
SURFACE WINDS.......WEST WINDS 7-12 MPH WITH GUSTS TO 20 MPH.  
   
FORECAST DAYS 3 THROUGH 5
 
   
SUNDAY
 
 
SNOW SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN  
THE MID 20S. HIGHS IN THE MID 30S. WEST WINDS 5-13 MPH.    
MONDAY
 
 
SNOW SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN  
THE UPPER 20S. HIGHS IN THE UPPER 30S. WEST WINDS 5-13 MPH.    
TUESDAY
 
 
SNOW SHOWERS LIKELY AND SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN  
THE MID 20S. HIGHS IN THE MID 30S. NORTH WINDS 6-10 MPH.  
 
WEATHER TABLE FOR 2017 SNOW EVENT THUNDER LAKE.  
 
+++ DATA IN THE FOLLOWING TABLE HAS BEEN SAMPLED DIRECTLY FROM THE  
FORECAST DATABASE. VALUES IN THE TABLE MAY VARY SLIGHTLY FROM  
INFORMATION IN THE NARRATIVE FORECAST. FEEDBACK WELCOME. +++  
 
FORECAST SC PP 20-FT G TEMP RH  
VALID AT % % WIND S F %  
MPH T  
 
05/19-11 99 82 ENE 6 6 25 81  
05/19-12 96 82 ENE 6 6 26 78  
05/19-13 96 81 ENE 6 6 26 79  
05/19-14 96 76 ENE 6 6 26 80  
05/19-15 90 71 NE 6 6 26 81  
05/19-16 89 66 NE 6 6 26 80  
05/19-17 88 59 NE 5 5 26 79  
05/19-18 88 52 NE 5 5 26 78  
05/19-19 90 46 NNE 3 3 25 80  
05/19-20 87 44 N 3 3 24 83  
05/19-21 88 41 NNW 3 3 22 88  
05/19-22 81 39 NNW 5 5 21 88  
05/19-23 80 37 WNW 6 6 20 87  
05/20-00 77 35 WNW 8 13 19 88  
05/20-01 59 32 WNW 9 15 18 91  
05/20-02 71 29 WNW 10 17 18 91  
05/20-03 72 27 WNW 12 18 18 92  
05/20-04 70 24 WNW 13 20 18 92  
05/20-05 69 22 WNW 13 20 19 90  
05/20-06 59 24 WNW 13 21 19 92  
05/20-07 64 24 WNW 13 20 21 87  
05/20-08 65 25 WNW 12 20 24 80  
05/20-09 68 25 W 12 18 26 78  
05/20-10 63 25 W 12 18 28 76  
05/20-11 64 27 W 12 18 29 78  
05/20-12 62 29 W 12 18 30 78  
05/20-13 59 29 W 12 18 31 77  
05/20-14 59 29 W 12 18 32 75  
05/20-15 56 29 W 12 18 32 75  
05/20-16 55 29 W 12 18 33 72  
05/20-17 56 29 W 12 18 33 72  
05/20-18 53 16 W 12 18 32 75  
05/20-19 53 16 W 12 18 31 77  
05/20-20 53 16 W 10 17 28 84  
05/20-21 53 16 W 10 16 26 88  
05/20-22 53 16 W 10 16 25 89  
05/20-23 53 16 W 10 16 25 87  
05/21-00 52 15 W 10 16 25 85  
05/21-01 52 15 W 10 17 25 83  
05/21-02 52 15 W 12 18 25 82  
05/21-03 52 15 W 12 18 25 81  
05/21-04 52 15 W 12 18 24 83  
05/21-05 52 15 W 12 17 24 83  
05/21-06 60 28 W 10 16 25 81  
05/21-07 60 28 W 9 14 26 81  
05/21-08 60 28 W 7 7 29 76  
05/21-09 60 28 W 6 6 31 75  
05/21-10 60 28 W 5 5 32 75  
05/21-11 60 28 WSW 5 5 32 79  
05/21-12 83 56 WSW 5 5 33 78  
05/21-13 83 56 WSW 5 5 34 78  
05/21-14 83 56 SW 3 3 34 80  
05/21-15 83 56 SW 3 3 35 79  
05/21-16 83 56 SW 5 5 35 81  
05/21-17 83 56 WSW 5 5 34 85  
05/21-18 86 59 WSW 6 6 33 89  
05/21-19 88 59 WSW 6 6 31 93  
05/21-20 91 59 WSW 6 6 29 97  
05/21-21 93 59 WSW 6 6 28 96  
05/21-22 88 59 WSW 7 7 28 93  
05/21-23 79 59 W 7 7 29 87  
05/22-00 74 39 W 8 13 30 81  
05/22-01 74 39 W 9 14 30 80  
05/22-02 74 39 W 9 15 29 82  
05/22-03 74 39 WNW 10 16 28 85  
05/22-04 68 39 WNW 10 17 28 83  
05/22-05 55 39 WNW 12 18 27 85  
05/22-06 48 28 WNW 12 18 27 85  
 
KEY:  
 
FORECAST - MONTH/DAY-HOUR OF FORECAST  
VALID AT - /24-HOUR CLOCK LOCAL TIME/  
SC - SKY COVER /PERCENT/  
PP - PROBABILITY OF PRECIPITATION 0.01 INCH /PERCENT/  
20-FT WIND - 20-FOOT WIND /MPH/  
GST - 20-FOOT WIND GUST /MPH/  
TEMP - TEMPERATURE /DEGREES F/  
RH - RELATIVE HUMIDITY /PERCENT/  
 

 
FORECASTER...GIMMESTAD  
REQUESTED BY...JOHN MACK  
TYPE OF REQUEST...OTHER  
.TAG 1709766.0/BOU  
 
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