FNUS75 KBOU 131254 FWSBOU SPOT FORECAST FOR LOWER CO RIVER...NPS NATIONAL WEATHER SERVICE DENVER CO 512 AM MST TUE DEC 13 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...SOUTHWEST FLOW ALOFT AS AN UPPER DISTURBANCE NEARS WILL BECOME WEST TO NORTHWEST TONIGHT AS THE DISTURBANCE MOVES OVERHEAD. THIS WILL BRING A FEW FLURRIES POSSIBLE DURING THE DAY THEN A GREATER CHANCE TONIGHT. TEMPERATURES WILL BE SLIGHTLY COOLER TODAY FROM THE CLOUD COVER. SMOKE DISPERSION WILL BE GOOD TODAY AS THE UPPER DISTURBANCE NEARS AND WILL SEE EVEN MORE IMPROVEMENT WEDNESDAY. WINDS WILL BECOME STRONGER WEDNESDAY AS THE SYSTEM MOVES EAST AND CREATES A GRADIENT FOR GUSTY WEST WINDS UP TO 35 MPH. EXPECT DRY AND SEASONAL TEMPERATURES THURSDAY THROUGH THE WEEKEND. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........PARTLY CLOUDY(40-50%) UNTIL 1100...THEN MOSTLY CLOUDY(50-60%). CHANCE OF SNOW AFTER 1700. MAX TEMPERATURE.....35. MIN HUMIDITY........56%. 20-FOOT WINDS.......UPSLOPE/UPVALLEY 4-10 MPH UNTIL 0900...THEN SOUTHWEST 6-7 MPH UNTIL 1500...THEN SOUTHEAST AROUND 5 MPH. TRANSPORT WINDS.....SOUTHWEST 12-20 MPH. MIXING HEIGHT.......BELOW 1000 FT AGL UNTIL 0900. 4200-5200 FT AGL AFTER 1100. SMOKE DISPERSAL.....POOR UNTIL 1000...THEN GOOD UNTIL 1100...THEN VERY GOOD UNTIL 1600...THEN GOOD UNTIL 1700...THEN FAIR. HAINES INDEX........2 VERY LOW. .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW. MIN TEMPERATURE.....15. MAX HUMIDITY........73%. 20-FOOT WINDS.......DOWNSLOPE/DOWNVALLEY 2-8 MPH UNTIL 2400...THEN WEST 6-7 MPH. TRANSPORT WINDS.....SOUTHWEST 4-12 MPH UNTIL 2400...THEN NORTHWEST 9-20 MPH. MIXING HEIGHT.......2800-3800 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 0300...THEN FAIR. HAINES INDEX........2 VERY LOW. .WEDNESDAY... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 1700...THEN SLIGHT CHANCE OF SNOW. MAX TEMPERATURE.....31. MIN HUMIDITY........52%. 20-FOOT WINDS.......WEST WINDS 13-23 MPH WITH GUSTS TO 35 MPH. TRANSPORT WINDS.....WEST 24-32 MPH UNTIL 1200...THEN 36-40 MPH. MIXING HEIGHT.......5000-6000 FT AGL. SMOKE DISPERSAL.....GOOD UNTIL 0900. EXCELLENT AFTER 1200. HAINES INDEX........2 VERY LOW. .FORECAST DAYS 3 THROUGH 5... .THURSDAY...MOSTLY CLEAR. LOWS AROUND 13. HIGHS IN THE LOWER 30S. SOUTHWEST WINDS AROUND 8 MPH. .FRIDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW AFTER 0600 UNTIL 1800. LOWS AROUND 7. HIGHS AROUND 30. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .SATURDAY...PARTLY CLOUDY. LOWS AROUND 4. HIGHS IN THE LOWER 30S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. FIRE WEATHER TABLE FOR LOWER CO RIVER. +++ 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. PLEASE PROVIDE FEEDBACK IF THE INFORMATION IN THIS TABLE HAS BEEN REPRESENTATIVE AND/OR USEFUL. +++ FORECAST SC PP WR AT RH 20FT G H L 10K MIXG TRAN VENTL AJTV VALID AT % % % F % WIND S I A WIND HGT WIND RATE RATNG MPH T L MPH AGL MPH KT-FT 12/13-05 47 8 2 14 72 SW 2 2 2 1 SW48 177 SW 5 668 P 12/13-06 47 8 2 13 77 SW 2 2 2 1 SW39 195 SW 5 752 P 12/13-07 47 8 2 13 84 SW 2 2 2 1 S29 214 SW 5 836 P 12/13-08 47 8 2 15 86 SW 3 3 2 1 S21 232 SW 5 920 P 12/13-09 47 8 2 20 77 SW 5 5 2 1 S20 1686 SW10 31171 P 12/13-10 47 8 2 24 72 SW 5 5 2 1 SW22 3139 SW17 61421 G 12/13-11 53 8 2 28 67 SW 6 6 2 1 SW26 4593 SW23 91672 G 12/13-12 53 8 2 31 64 SW 7 7 2 1 SW29 4863 SW24 100700 V 12/13-13 53 8 2 32 62 SW 7 7 2 1 SW32 5134 SW24 109727 V 12/13-14 53 8 2 33 60 SW 7 7 2 1 SW36 5404 SW25 118754 V 12/13-15 53 8 2 33 59 S 5 5 2 1 SW40 4947 SW22 95013 G 12/13-16 53 8 2 32 56 SE 2 2 2 1 SW45 4490 SW17 71271 G 12/13-17 69 37 15 29 59 CALM 0 2 1 SW45 4034 W14 47529 F 12/13-18 69 37 15 27 61 CALM 0 2 1 SW39 3823 SW10 35899 P 12/13-19 69 37 15 26 62 CALM 1 2 1 SW30 3612 S 7 24269 P 12/13-20 69 37 15 26 62 NE 2 2 2 1 SW22 3402 S 5 12638 P 12/13-21 69 37 15 25 62 N 2 2 2 1 SW16 3334 SW 5 13694 P 12/13-22 69 37 15 25 63 NW 3 3 2 1 SW14 3267 W 6 14749 P 12/13-23 75 42 19 24 64 NW 3 3 2 1 SW13 3200 NW 6 15805 P 12/14-00 75 42 19 23 66 NW 3 3 2 1 W13 3188 NW 8 22373 P 12/14-01 75 42 19 23 70 W 5 5 2 1 W14 3177 NW10 28942 P 12/14-02 75 42 19 22 71 W 5 5 2 1 NW16 3165 W13 35510 P 12/14-03 75 42 19 21 70 W 6 6 2 1 NW18 3059 W16 41604 F 12/14-04 75 42 19 20 67 W 6 6 2 1 NW21 2953 W18 47697 F 12/14-05 95 51 27 19 66 W 7 7 2 1 NW22 2847 W22 53790 F 12/14-06 95 51 27 18 69 W 8 8 2 1 NW22 2932 W23 59929 F 12/14-07 95 51 27 17 73 W 9 9 2 1 NW21 3017 W25 66067 G 12/14-08 86 51 27 20 73 W10 16 2 1 NW21 3102 W26 72205 G 12/14-09 86 51 27 22 69 W12 17 2 1 NW22 3795 W29 96136 G 12/14-10 86 51 27 26 62 W13 20 2 1 NW23 4488 W30 120068 V 12/14-11 76 33 12 28 58 W15 23 2 1 W25 5182 W32 143999 V 12/14-12 76 33 12 30 56 W17 26 2 1 W28 5542 W35 165532 E 12/14-13 76 33 12 30 54 W21 30 2 1 NW31 5902 W36 187066 E 12/14-14 67 33 12 31 52 W22 33 2 1 NW32 6262 W38 208600 E 12/14-15 67 33 12 30 54 W22 32 2 1 NW31 5858 W39 197934 E 12/14-16 67 33 12 28 56 W21 30 2 1 NW29 5455 W39 187268 E 12/14-17 56 24 5 25 61 W18 28 2 1 N26 5052 W40 176602 E 12/14-18 56 24 5 22 67 W17 26 2 1 N25 4601 W37 150111 E 12/14-19 56 24 5 21 68 W16 24 2 1 N25 4151 W33 123620 V 12/14-20 56 24 5 20 70 W15 23 2 1 N24 3700 W30 97129 G 12/14-21 56 24 5 19 71 W15 22 2 1 N24 3467 W28 85260 G 12/14-22 56 24 5 18 73 W14 21 2 1 N24 3233 W25 73391 G 12/14-23 57 7 1 18 71 W13 20 2 1 N23 2999 W24 61522 G 12/15-00 57 7 1 18 68 W12 17 2 1 N24 2818 W21 52511 F 12/15-01 57 7 1 18 66 W12 16 2 1 NW24 2636 W18 43500 F 12/15-02 57 7 1 18 64 W10 15 2 1 NW24 2454 W16 34488 P 12/15-03 57 7 1 17 64 W 9 14 2 1 NW23 2317 W16 33039 P 12/15-04 57 7 1 17 64 W 9 9 2 1 N22 2180 W17 31590 P 12/15-05 24 0 0 16 65 W 8 8 2 1 N21 2043 W17 30140 P 12/15-06 24 0 0 16 67 W 7 7 2 1 NW20 1893 W16 26124 P 12/15-07 24 0 0 15 71 SW 6 6 3 1 NW20 1742 W14 22108 P 12/15-08 24 0 0 16 69 SW 6 6 3 1 NW20 1591 W13 18092 P 12/15-09 24 0 0 20 62 SW 6 6 3 1 NW18 2158 W14 25501 P 12/15-10 24 0 0 25 54 SW 5 5 3 1 W18 2725 W14 32910 P 12/15-11 13 0 0 28 49 SW 6 6 3 1 W18 3292 W14 40319 F 12/15-12 13 0 0 30 46 SW 8 8 3 1 W20 3684 W16 53030 F 12/15-13 13 0 0 31 45 SW10 15 3 1 W21 4076 W18 65742 G 12/15-14 13 0 0 32 43 SW12 17 3 1 W22 4467 W21 78453 G 12/15-15 13 0 0 30 45 SW12 17 3 1 W23 4038 W21 73414 G 12/15-16 13 0 0 28 49 SW12 17 3 1 W24 3609 W22 68375 G 12/15-17 22 0 0 24 55 SW10 16 3 1 SW25 3179 W23 63336 G 12/15-18 22 0 0 20 65 SW 9 15 3 1 SW26 2914 W22 55205 F 12/15-19 22 0 0 19 66 SW 9 9 2 1 SW28 2649 W21 47073 F 12/15-20 22 0 0 17 68 SW 8 8 2 1 SW29 2385 W18 38941 P 12/15-21 22 0 0 16 69 SW 7 7 2 1 SW30 2174 W17 32689 P 12/15-22 22 0 0 14 71 SW 6 6 2 1 SW31 1963 W15 26437 P 12/15-23 47 0 0 15 68 SW 5 5 2 1 SW32 1753 W14 20185 P 12/16-00 47 0 0 15 65 SW 3 3 2 1 SW35 1897 W12 18595 P 12/16-01 47 0 0 15 62 W 3 3 2 1 SW35 2042 W10 17005 P 12/16-02 47 0 0 14 60 W 3 3 2 1 SW35 2186 W 8 15415 P 12/16-03 47 0 0 13 62 W 2 2 2 1 SW33 1858 W 6 10784 P 12/16-04 47 0 0 12 63 W 2 2 2 1 SW31 1530 W 3 6153 P 12/16-05 59 17 3 11 66 W 2 2 2 1 SW29 1202 CALM 1522 P KEY: FORECAST - MONTH/DAY-HOUR OF FORECAST /24-HOUR CLOCK LOCAL TIME/ VALID AT SC - SKY COVER /PERCENT/ PP - PROBABILITY OF PRECIPITATION 0.01 INCH /PERCENT/ WR - PROBABILITY OF WETTING RAIN 0.1 INCH /PERCENT/ AT - TEMPERATURE /DEGREES F/ RH - RELATIVE HUMIDITY /PERCENT/ 20FT WIND - 20-FOOT WIND /MPH/ GST - 20-FOOT WIND GUST /MPH/ HI - HAINES INDEX LAL - LIGHTNING ACTIVITY LEVEL 10K WIND - 10000 FEET ABOVE GROUND LEVEL FREE-AIR WINDS /MPH/ MIXG HGT - MIXING HEIGHT /FEET ABOVE GROUND LEVEL/ TRAN 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...WFO BOULDER REQUESTED BY...JEFF SINGER REASON FOR REQUEST...PRESCRIBED .TAG 20111213.LOWER.01/BOU