FNUS75 KBOU 061434 FWSBOU SPOT FORECAST FOR RFB 9...USFS NATIONAL WEATHER SERVICE DENVER CO 734 AM MST WED JAN 6 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...AN ARCTIC COLD FRONT WAS BACKING INTO THE FOOTHILLS EARLY THIS MORNING. THIS WILL BRING MUCH COLDER TEMPERATURES THROUGH THE COURSE OF THE DAY AND ALSO LIGHT SNOWFALL. MIXING HEIGHTS WILL BE LIMITED BY THE COLDER TEMPERATURES BUT LIGHT SNOW WILL AID SMOKE DISPERSION...ESPECIALLY FROM LATE MORNING THROUGH THE AFTERNOON WHEN THE MAIN SHOT OF SNOW IS EXPECTED TO OCCUR. THE VERY COLD AND STABLE AIRMASS WILL HOLD STRONG THROUGH THURSDAY NIGHT... AND THEN BEGIN TO MODERATE FRIDAY AND ESPECIALLY OVER THE WEEKEND WHEN BETTER SMOKE DISPERSION WILL DEVELOP. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........CLOUDY. SNOW LIKELY UNTIL 1100...THEN SNOW. MAX TEMPERATURE.....28-32 AT 0800...FALLING INTO THE SINGLE DIGITS THROUGH THIS FTERNOON. MIN HUMIDITY........44%. WIND (20 FT)........BREEZY. NORTH/NORTHEAST 8-17 MPH. TRANSPORT WINDS.....WEST 32-40 MPH UNTIL 1200...THEN NORTHWEST 9-20 MPH. MIXING HEIGHT.......600-1600 FT AGL. SMOKE DISPERSAL.....GOOD UNTIL 0900. POOR AFTER 1100. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .TONIGHT... SKY/WEATHER.........CLOUDY. SNOW LIKELY UNTIL 2000...THEN CHANCE OF SNOW UNTIL 2300. MIN TEMPERATURE.....-2. MAX HUMIDITY........100%. WIND (20 FT)........WEST 5-11 MPH. TRANSPORT WINDS.....WEST 5-12 MPH. MIXING HEIGHT.......400 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .THURSDAY... SKY/WEATHER.........MOSTLY SUNNY UNTIL 1700...THEN PARTLY CLOUDY. MAX TEMPERATURE.....13. MIN HUMIDITY........49%. WIND (20 FT)........WEST 6-12 MPH. TRANSPORT WINDS.....WEST 12-20 MPH. MIXING HEIGHT.......1000-2000 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FORECAST DAYS 3 THROUGH 5... .FRIDAY...MOSTLY CLEAR. LOWS NEAR ZERO. HIGHS IN THE LOWER 20S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .SATURDAY...MOSTLY CLEAR. NOT AS COLD. LOWS AROUND 11. HIGHS IN THE LOWER 30S. WEST WINDS AROUND 14 MPH WITH GUSTS TO AROUND 30 MPH. .SUNDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SNOW AFTER 1800. LOWS AROUND 19. HIGHS IN THE UPPER 30S. WEST WINDS AROUND 16 MPH WITH GUSTS TO AROUND 30 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR RFB 9. +++ DATA IN THE FOLLOWING TABLE HAS BEEN SAMPLED DIRECTLY FROM THE DIGITAL DATABASE. VALUES IN THE TABLE MAY NOT AGREE WITH INFORMATION IN THE NARRATIVE FORECAST. INFORMATION CONTAINED IN THIS TABLE SHOULD NOT BE CONSIDERED AN OFFICIAL FORECAST. PLEASE PROVIDE FEEDBACK IF THE INFORMATION IN THIS TABLE HAS BEEN REPRESENTATIVE AND/OR USEFUL. +++ FORECAST SC PP TF 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 01/06-08 75 61 28 50 W 15 28 2 1 NW64 1922 W 38 64089 G 01/06-09 75 61 20 73 NE 15 1 1773 NW 35 54555 F 01/06-10 75 61 20 75 NE 12 1 1624 N 31 45021 F 01/06-11 87 80 20 79 NE 8 12 2 1 NW76 1475 N 28 35487 P 01/06-12 87 80 16 95 NE 7 1 1100 N 21 24447 P 01/06-13 87 80 12 100 NE 7 1 724 N 15 13406 P 01/06-14 87 80 9 100 N 8 12 2 1 NW91 349 N 8 2366 P 01/06-15 87 80 8 100 N 8 1 337 N 8 2413 P 01/06-16 87 80 6 100 N 8 1 326 N 9 2459 P 01/06-17 96 64 5 100 N 8 8 2 1 NW100 314 N 9 2505 P 01/06-18 96 64 4 100 N 7 1 337 N 9 2526 P 01/06-19 96 64 3 100 N 5 1 361 NW 8 2546 P 01/06-20 96 45 2 100 N 3 3 2 1 NW99 384 NW 8 2567 P 01/06-21 96 45 2 100 N 2 1 393 NW 8 2821 P 01/06-22 96 45 1 100 NW 2 1 403 NW 9 3074 P 01/06-23 71 8 1 100 NW 2 2 2 1 NW91 412 NW 9 3328 P 01/07-00 71 8 0 100 NW 3 1 381 NW 9 3137 P 01/07-01 71 8 0 100 W 5 1 350 W 9 2946 P 01/07-02 71 8 0 100 W 7 7 4 1 NW87 319 W 10 2754 P 01/07-03 71 8 -1 100 W 8 1 357 W 10 3448 P 01/07-04 71 8 -1 99 W 9 1 395 W 12 4141 P 01/07-05 27 9 0 93 W 10 10 4 1 NW86 433 W 13 4834 P 01/07-06 27 9 0 93 W 10 1 437 W 12 4572 P 01/07-07 27 9 -1 96 W 9 1 441 W 12 4310 P 01/07-08 27 9 1 86 W 9 9 4 1 NW79 446 W 10 4049 P 01/07-09 27 9 4 74 W 9 1 787 W 13 9826 P 01/07-10 27 9 6 65 W 8 1 1129 W 15 15604 P 01/07-11 2 0 9 56 W 8 8 4 1 NW75 1470 NW 17 21381 P 01/07-12 2 0 10 52 W 8 1 1644 NW 18 26306 P 01/07-13 2 0 12 49 W 8 1 1818 W 20 31231 P 01/07-14 2 0 12 49 W 7 7 4 1 NW71 1991 W 21 36156 P 01/07-15 2 0 12 50 W 8 1 1612 W 18 27656 P 01/07-16 2 0 11 53 W 8 1 1232 W 16 19155 P 01/07-17 32 0 8 61 W 9 9 4 1 NW68 852 W 14 10655 P 01/07-18 32 0 6 65 W 9 1 674 W 13 7831 P 01/07-19 32 0 4 68 W 9 1 496 W 10 5006 P 01/07-20 32 0 3 70 W 9 9 4 1 NW63 318 W 8 2182 P 01/07-21 32 0 2 72 W 9 1 284 W 8 1989 P 01/07-22 32 0 1 73 W 9 1 251 W 8 1796 P 01/07-23 12 0 0 74 W 9 9 3 1 NW58 218 W 8 1604 P 01/08-00 12 0 -1 75 W 9 1 206 W 8 1498 P 01/08-01 12 0 -1 74 W 8 1 193 W 8 1392 P 01/08-02 12 0 -2 74 W 8 8 4 1 NW55 181 W 8 1287 P 01/08-03 12 0 -2 73 W 8 1 168 W 9 1278 P 01/08-04 12 0 -3 72 W 7 1 154 W 9 1270 P 01/08-05 27 0 -3 73 W 12 12 4 1 NW53 141 W 10 1262 P 01/08-06 27 0 -3 74 W 12 1 154 W 10 1400 P 01/08-07 27 0 -2 72 W 12 1 167 W 10 1537 P 01/08-08 27 0 1 65 W 12 12 4 1 NW51 180 W 10 1675 P 01/08-09 27 0 6 56 W 10 1 581 W 12 5963 P 01/08-10 27 0 10 49 W 9 1 981 NW 12 10251 P 01/08-11 3 0 14 43 W 8 8 4 1 NW47 1381 NW 13 14540 P 01/08-12 3 0 17 39 W 9 1 1995 NW 16 30877 P 01/08-13 3 0 19 37 W 9 1 2609 NW 20 47214 F 01/08-14 3 0 19 37 W 10 10 3 1 NW53 3223 NW 23 63551 G 01/08-15 3 0 19 39 W 12 1 2626 NW 22 50977 F 01/08-16 3 0 18 41 W 9 1 2028 NW 22 38403 P 01/08-17 0 0 16 45 W 10 10 3 1 N54 1431 NW 21 25829 P 01/08-18 0 0 15 48 W 10 1 1177 NW 18 19806 P 01/08-19 0 0 14 50 W 10 1 922 NW 16 13783 P 01/08-20 0 0 13 51 W 10 10 4 1 N55 668 NW 14 7760 P 01/08-21 0 0 12 52 W 10 1 544 NW 13 6085 P 01/08-22 0 0 11 52 W 10 1 420 W 12 4411 P 01/08-23 2 0 10 53 W 10 10 4 1 N51 296 W 10 2736 P 01/09-00 2 0 9 53 W 10 1 261 W 10 2415 P 01/09-01 2 0 9 53 W 10 1 226 W 10 2094 P 01/09-02 2 0 8 53 W 10 10 4 1 N49 191 W 10 1773 P 01/09-03 2 0 8 53 W 10 1 178 W 10 1679 P 01/09-04 2 0 8 53 W 12 1 164 W 12 1585 P 01/09-05 2 0 8 54 W 12 12 4 1 N45 150 W 12 1490 P KEY: FORECAST - MONTH/DAY-HOUR OF FORECAST /24-HOUR CLOCK LOCAL TIME/ VALID AT SC - SKY COVER /PERCENT/ PP - PROBABILITY OF PRECIPITATION /PERCENT/ TF - 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...CHAD BUSER REASON FOR REQUEST...PRESCRIBED .TAG 20100106.RFB9_.01/BOU