FNUS75 KBOU 171602 FWSBOU SPOT FORECAST FOR OWL MTN SOUTH PILES...USFS NATIONAL WEATHER SERVICE DENVER/BOULDER CO 900 AM MST MON DEC 17 2012 FORECAST IS BASED ON IGNITION TIME OF 1100 MST ON DECEMBER 17. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...POWERFUL JET STREAM WINDS WILL USHER IN ANOTHER BATCH OF MOIST PACIFIC AIR LATER TODAY RESULTING IN ANOTHER PERIOD OF MODERATE TO HEAVY SNOWFALL IN THE MOUNTAINS OF NORTHERN COLORADO. THE SNOWFALL WILL BE ACCOMPANIED BY STRONG AND VERY GUSTY WEST WINDS CAPABLE OF PRODUCING CONSIDERABLE BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES AND OPEN AREAS ABOVE TIMBERLINE. HOWEVER BY TONIGHT AS THE CORE OF AN ESPECIALLY STRONG JET STREAM PASSES OVERHEAD...GUSTS ON THE ORDER OF 50 TO 65 MPH MAY DEVELOP. IN ADDITION TO THE WIND...SNOWFALL IS EXPECTED TO INCREASE LATER TODAY...AND POSSIBLY BECOME HEAVY OVERNIGHT. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........CLOUDY WITH OCCASIONAL SNOW. MAX TEMPERATURE.....AROUND 26-30. MIN HUMIDITY........62-70%. WIND (20 FT)........BREEZY. WEST WINDS 18-28 MPH WITH GUSTS TO 50 MPH. MIXING HEIGHT.......5000-6000 FT AGL. TRANSPORT WINDS.....WEST 45-50 MPH UNTIL 1100...THEN AROUND 55 MPH. SMOKE DISPERSAL.....VERY GOOD UNTIL 0900...THEN EXCELLENT. .TONIGHT... SKY/WEATHER.........CLOUDY WITH SNOW AND BLOWING SNOW. MIN TEMPERATURE.....AROUND 10 ABOVE. MAX HUMIDITY........100%. WIND (20 FT)........WINDY. WEST WINDS 24-31 MPH WITH GUSTS TO 55 MPH UNTIL 2000...THEN 16-22 MPH WITH GUSTS TO 40 MPH. MIXING HEIGHT.......3300-4300 FT AGL UNTIL 2200. BELOW 1000 FT AGL AFTER 0200. TRANSPORT WINDS.....WEST 40-50 MPH UNTIL 2300...THEN 25-35 MPH. SMOKE DISPERSAL.....EXCELLENT UNTIL 2100. POOR AFTER 0100. .TUESDAY... SKY/WEATHER.........CLOUDY WITH OCCASIONAL SNOW. MAX TEMPERATURE.....AROUND 25-30. MIN HUMIDITY........56-64%. WIND (20 FT)........SOUTHWEST WINDS 11-13 MPH WITH GUSTS TO 25 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0800. 4800-5800 FT AGL AFTER 1000. TRANSPORT WINDS.....SOUTHWEST 20-30 MPH UNTIL 1100...THEN 30-35 MPH. SMOKE DISPERSAL.....POOR UNTIL 0900...THEN GOOD UNTIL 1000...THEN VERY GOOD UNTIL 1100...THEN EXCELLENT UNTIL 1500...THEN VERY GOOD. .FORECAST DAYS 3 THROUGH 5... .WEDNESDAY...COLDER. SNOW LIKELY. LOWS AROUND 13. HIGHS AROUND 17. NORTHWEST WINDS 10-15 MPH. .THURSDAY...PARTLY CLOUDY. CHANCE OF SNOW SHOWERS. LOWS AROUND 8 BELOW. HIGHS AROUND 16. WEST WINDS 10-16 MPH. .FRIDAY...PARTLY CLOUDY. LOWS AROUND 5. HIGHS IN THE MID 20S. SOUTHWEST WINDS 9-11 MPH. FIRE WEATHER TABLE FOR OWL MTN SOUTH PILES. +++ 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 WR AT RH 20-FT G H L 10KFT MIXG TRANS VENTL AJTV VALID AT % % % F % WIND S I A WIND HGT WIND RATE RATNG MPH T L MPH AGL MPH KT-FT 12/17-08 92 62 41 19 67 WSW 18 30 2 1 WNW 70 3075 W 43114194 V 12/17-09 92 62 41 21 66 WSW 22 35 2 1 WNW 73 3709 W 46151761 E 12/17-10 92 62 41 23 66 W 25 39 2 1 WNW 76 4343 W 49189329 E 12/17-11 97 84 74 25 65 W 26 43 2 1 WNW 82 4977 W 53226896 E 12/17-12 97 84 74 26 67 W 24 39 2 1 WNW 90 5466 W 54255882 E 12/17-13 97 84 74 27 67 W 22 35 2 1 WNW 98 5955 W 55284868 E 12/17-14 97 84 74 27 68 W 21 33 2 1 WNW105 6445 W 56313854 E 12/17-15 97 84 74 25 74 W 25 40 2 1 WNW110 5755 W 55275340 E 12/17-16 97 84 74 23 78 W 31 49 2 1 WNW114 5065 W 53236826 E 12/17-17 94 95 92 22 77 W 35 55 2 1 WNW115 4375 W 52198313 E 12/17-18 94 95 92 21 77 W 31 51 2 1 WNW112 4187 W 51184635 E 12/17-19 94 95 92 20 77 W 26 43 2 1 W105 3999 W 49170957 E 12/17-20 94 95 92 20 74 W 22 35 2 1 W101 3811 W 47157279 E 12/17-21 94 95 92 19 74 W 22 35 2 1 W104 3241 W 45128670 V 12/17-22 94 95 92 18 75 W 23 37 2 1 W107 2672 W 41100061 V 12/17-23 98 96 94 16 80 W 24 39 2 1 W110 2102 W 39 71452 G 12/18-00 98 96 94 15 82 W 24 38 2 1 W109 1713 W 35 54657 F 12/18-01 98 96 94 14 85 W 22 36 2 1 W108 1324 WSW 30 37862 P 12/18-02 98 96 94 13 88 W 21 33 2 1 W106 935 WSW 26 21067 P 12/18-03 98 96 94 12 89 W 18 30 2 1 W107 807 WSW 24 17197 P 12/18-04 98 96 94 11 92 W 17 26 2 1 W108 679 WSW 22 13327 P 12/18-05 98 77 63 11 91 W 15 24 2 1 W108 551 WSW 20 9457 P 12/18-06 98 77 63 10 98 WSW 14 22 2 1 W108 697 WSW 20 11595 P 12/18-07 98 77 63 10 00 SW 13 21 2 1 W107 843 SW 18 13733 P 12/18-08 98 77 63 11 00 SW 13 21 2 1 W106 989 SW 18 15872 P 12/18-09 98 77 63 15 89 SW 14 22 2 1 W105 2521 SW 24 65648 G 12/18-10 98 77 63 20 76 SW 14 23 2 1 W102 4052 WSW 29115424 V 12/18-11 97 77 63 25 65 SW 15 24 2 1 W100 5583 WSW 35165200 E 12/18-12 97 77 63 28 60 SW 15 23 2 1 WSW 98 5907 WSW 32167420 E 12/18-13 97 77 63 29 58 SW 14 22 2 1 WSW 94 6230 WSW 31169640 E 12/18-14 97 77 63 28 60 SW 13 21 2 1 WSW 92 6554 SW 30171860 E 12/18-15 97 77 63 27 61 SSW 13 20 2 1 WSW 90 5366 SW 29137698 V 12/18-16 97 77 63 24 65 SSW 13 20 2 1 WSW 87 4178 SW 28103536 V 12/18-17 99 73 57 22 68 SSW 13 21 2 1 WSW 85 2990 SW 26 69375 G 12/18-18 99 73 57 20 73 SSW 14 22 2 1 WSW 81 2588 SW 28 61290 G 12/18-19 99 73 57 19 77 SSW 15 24 2 1 WSW 76 2186 SSW 29 53206 F 12/18-20 99 73 57 19 77 SSW 16 25 2 1 WSW 73 1785 SSW 29 45121 F 12/18-21 99 73 57 19 75 SSW 15 24 2 1 WSW 73 1915 SSW 26 42703 F 12/18-22 99 73 57 18 76 SSW 14 22 2 1 WSW 73 2044 SW 23 40285 F 12/18-23 94 68 50 18 74 SSW 12 18 2 1 WSW 71 2174 SW 20 37867 P 12/19-00 94 68 50 17 76 S 9 14 2 1 WSW 67 2398 SSW 16 32662 P 12/19-01 94 68 50 16 79 S 6 6 2 1 SW 60 2621 SSW 13 27458 P 12/19-02 94 68 50 15 80 SSE 3 3 2 1 SW 54 2845 S 9 22253 P 12/19-03 94 68 50 14 80 SE 2 2 2 1 SW 52 2271 SSE 8 16356 P 12/19-04 94 68 50 14 75 CALM 1 3 1 SW 51 1697 E 6 10458 P 12/19-05 93 65 45 14 70 NE 2 2 3 1 SW 49 1122 E 5 4561 P 12/19-06 93 65 45 13 68 NE 6 6 3 1 SW 46 1720 ENE 9 18518 P 12/19-07 93 65 45 13 64 NE 9 15 3 1 SW 41 2318 ENE 14 32475 P 12/19-08 93 65 45 13 61 NE 13 21 3 1 SW 37 2916 ENE 18 46433 F 12/19-09 93 65 45 12 64 NE 14 23 3 1 SW 32 3330 NE 18 55091 F 12/19-10 93 65 45 11 68 N 15 24 2 1 SW 29 3743 NNE 20 63750 G 12/19-11 96 57 33 10 73 N 15 24 2 1 SW 25 4157 NNE 20 72409 G 12/19-12 96 57 33 10 72 N 15 24 2 1 SW 23 4653 N 21 82492 G 12/19-13 96 57 33 9 72 NNW 15 24 2 1 WSW 22 5149 NNW 21 92575 G 12/19-14 96 57 33 8 73 NNW 15 24 2 1 W 22 5646 NNW 21102658 V 12/19-15 96 57 33 6 76 NW 15 24 2 1 W 21 5266 NW 24106837 V 12/19-16 96 57 33 4 80 NW 15 24 2 1 W 23 4885 NW 26111016 V 12/19-17 73 23 5 3 79 NW 15 24 2 1 W 28 4505 NW 30115195 V 12/19-18 73 23 5 2 77 NW 15 23 2 1 W 40 4305 NW 30111827 V 12/19-19 73 23 5 1 74 WNW 14 22 2 1 NW 55 4104 WNW 30108459 V 12/19-20 73 23 5 -1 75 W 14 22 2 1 NNW 68 3904 WNW 31105090 V 12/19-21 73 23 5 -3 78 W 15 24 2 1 NNW 76 2930 WNW 29 77470 G 12/19-22 73 23 5 -6 85 W 16 25 2 1 NNW 82 1956 W 28 49849 F 12/19-23 42 0 0 -8 91 W 17 28 2 1 NNW 84 982 W 26 22228 P 12/20-00 42 0 0 -8 89 W 18 29 2 1 NNW 83 1193 W 28 29665 P 12/20-01 42 0 0 -7 83 W 18 29 2 1 NW 79 1403 W 30 37103 P 12/20-02 42 0 0 -6 78 WSW 17 28 2 1 NW 76 1614 W 32 44540 F 12/20-03 42 0 0 -6 75 WSW 14 23 2 1 NW 74 1375 W 28 34715 P 12/20-04 42 0 0 -6 72 SW 10 17 2 1 NW 71 1136 WSW 23 24891 P 12/20-05 40 1 0 -6 71 SSW 8 13 2 1 NW 69 897 WSW 20 15066 P 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/ WR - PROBABILITY OF WETTING RAIN 0.10 INCH /PERCENT/ AT - TEMPERATURE /DEGREES F/ RH - RELATIVE HUMIDITY /PERCENT/ 20-FT WIND - 20-FOOT WIND /MPH/ GST - 20-FOOT WIND GUST /MPH/ HI - HAINES INDEX LAL - LIGHTNING ACTIVITY LEVEL 10KFT WIND - 10000 FEET ABOVE GROUND LEVEL FREE-AIR WINDS /MPH/ MIXG HGT - MIXING HEIGHT /FEET ABOVE GROUND LEVEL/ TRANS WIND - TRANSPORT WINDS /MPH/ VENTL RATE - VENTILATION RATE /KNOT-FEET/ AJTV RATNG - SMOKE DISPERSION ADJECTIVE RATING P - POOR F - FAIR G - GOOD V - VERY GOOD E - EXCELLENT $$ FORECASTER...DANKERS REQUESTED BY...CASEY CHEESBROUGH TYPE OF REQUEST...PRESCRIBED .TAG 20121217.OWLMT.01/BOU