FNUS75 KBOU 141630 FWSBOU SPOT FORECAST FOR SHADED FUELS BREAK...USFS NATIONAL WEATHER SERVICE DENVER CO 915 AM MST WED JAN 14 2009 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A SHALLOW LAYER OF RELATIVELY MOIST ARCTIC AIR HAS SLIPPED INTO NORTHEAST COLORADO THIS WEDNESDAY MORNING. AS OF 0900 MST THE LEADING EDGE OF THIS COLD AIRMASS HAD MOVED OVER EASTERN PORTIONS OF THE INTERSTATE 25 URBAN CORRIDOR. HOWEVER...THE THICKEST CLOUDS...COLDEST AIR AND VERY LIGHT PRECIPITATION REMAIN OVER THE FAR NORTHEAST CORNER OF THE STATE. FOR THE BURN AREA...MOSTLY CLEAR SKIES WITH ONGOING NORTHWESTERLY DOWNSLOPE FLOW WILL GRADUALLY FILL WITH CLOUDS LATE THIS AFTERNOON AS SOME OF THE ARCTIC AIR ON THE PLAINS CREEPS UP THE FRONT RANGE VALLEYS. YOU MAY EVEN SEE A FEW SNOW FLURRIES BY THIS EVENING...BUT CLEARING SKIES ARE EXPECTED THURSDAY MORNING WITH A RESUMPTION OF LIGHT DOWNSLOPE FLOW. THEREFORE ON THURSDAY...EXPECT SIMILAR WEATHER CONDITIONS AS THOSE OBSERVED THIS MORNING WITH OCCASIONAL GUSTY DOWNSLOPE WINDS AS A FAIR WEATHER HIGH PRESSURE SYSTEM SLOWLY BUILDS IN THE FROM THE WEST. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........PARTLY CLOUDY(30-40%) UNTIL 1500...THEN BECOMING MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW SHOWERS AFTER 1500 UNTIL 1800. MAX TEMPERATURE.....39-44. MIN HUMIDITY........24-28%. 20-FOOT WINDS.......NORTHWEST 8-14 MPH UNTIL 1400...THEN UPSLOPE/UPVALLEY 3-8 MPH. TRANSPORT WINDS.....NORTHWEST 12-20 MPH. MIXING HEIGHT.......2800-3800 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 1100...THEN FAIR UNTIL 1500...THEN POOR. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW UNTIL 2300... THEN SLIGHT CHANCE OF SNOW UNTIL 0500. MIN TEMPERATURE.....14-19. MAX HUMIDITY........84-91%. 20-FOOT WINDS.......VARIABLE 2-6 MPH UNTIL 2300...THEN WEST 7-13 MPH. TRANSPORT WINDS.....WEST 5-12 MPH. MIXING HEIGHT.......400-1400 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .THURSDAY... SKY/WEATHER.........PARTLY CLOUDY(50-60%) UNTIL 1100...THEN MOSTLY SUNNY. MAX TEMPERATURE.....37-42. MIN HUMIDITY........28-34%. 20-FOOT WINDS.......WEST 7-12 MPH UNTIL 1300...THEN UPSLOPE/UPVALLEY 4-7 MPH UNTIL 1500...THEN NORTHWEST 8-13 MPH. TRANSPORT WINDS.....NORTHWEST 8-16 MPH. MIXING HEIGHT.......1200-2200 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 1400...THEN FAIR UNTIL 1500...THEN POOR. HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FORECAST DAYS 3 THROUGH 5... .FRIDAY...MOSTLY CLEAR. NOT AS COOL. LOWS AROUND 17. HIGHS IN THE UPPER 40S. WEST WINDS AROUND 9 MPH. .SATURDAY...MOSTLY CLEAR. LOWS AROUND 19. HIGHS IN THE UPPER 40S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .SUNDAY...MOSTLY CLEAR. LOWS AROUND 20. HIGHS IN THE UPPER 40S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR SHADED FUELS BREAK. +++ 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 01/14-09 49 0 29 44 W 9 1 1416 NW 15 18599 P 01/14-10 49 0 32 35 W 9 1 2431 NW 15 31989 P 01/14-11 49 0 36 30 NW 8 8 2 1 NW47 3445 NW 15 45379 F 01/14-12 49 0 39 27 NW 7 1 3764 NW 15 47101 F 01/14-13 58 10 41 25 N 6 1 4083 NW 14 48823 F 01/14-14 58 10 41 26 N 6 6 2 1 NW47 4401 NW 13 50545 F 01/14-15 58 10 41 28 N 6 1 3722 NW 14 43412 F 01/14-16 58 10 38 34 N 6 1 3042 NW 14 36278 P 01/14-17 61 18 33 45 N 7 7 2 1 NW58 2363 NW 14 29145 P 01/14-18 61 18 29 54 NW 7 1 1694 NW 14 20711 P 01/14-19 61 18 27 63 W 8 1 1024 W 13 12277 P 01/14-20 61 18 24 71 W 8 8 2 1 N51 355 W 13 3844 P 01/14-21 61 18 22 82 W 8 1 317 W 12 3217 P 01/14-22 61 18 20 93 W 9 1 279 W 10 2590 P 01/14-23 66 10 18 96 W 9 9 2 1 NW51 241 W 9 1963 P 01/15-00 66 10 16 100 W 9 1 231 W 9 1846 P 01/15-01 66 10 15 100 W 9 1 221 W 9 1729 P 01/15-02 66 10 14 100 W 9 9 2 1 NW49 212 W 9 1612 P 01/15-03 66 10 13 100 W 9 1 192 W 8 1440 P 01/15-04 66 10 13 100 W 8 1 173 W 8 1268 P 01/15-05 53 0 13 94 W 8 8 2 1 NW54 153 W 8 1096 P 01/15-06 53 0 13 96 W 9 1 141 W 9 1102 P 01/15-07 53 0 14 95 W 9 1 153 W 9 1304 P 01/15-08 53 0 18 90 W 9 9 2 1 N53 164 W 10 1505 P 01/15-09 53 0 22 75 W 9 1 415 W 12 4668 P 01/15-10 53 0 25 62 W 8 1 667 NW 13 7831 P 01/15-11 52 0 29 51 W 7 7 2 1 N55 918 NW 14 10994 P 01/15-12 52 0 32 44 W 7 1 1653 NW 15 23094 P 01/15-13 52 0 34 39 NW 7 1 2388 NW 16 35194 P 01/15-14 52 0 35 36 NW 6 6 2 1 N46 3123 NW 17 47295 F 01/15-15 52 0 35 34 NW 7 1 2252 NW 16 33638 P 01/15-16 52 0 33 35 NW 7 1 1380 NW 15 19981 P 01/15-17 22 0 30 38 W 8 8 2 1 NW45 509 NW 14 6325 P 01/15-18 22 0 28 41 W 9 1 407 NW 14 4884 P 01/15-19 22 0 26 46 W 10 1 305 W 13 3443 P 01/15-20 22 0 24 49 W 10 10 2 1 NW40 203 W 12 2002 P 01/15-21 22 0 23 53 W 10 1 174 W 10 1663 P 01/15-22 22 0 21 57 W 10 1 144 W 10 1325 P 01/15-23 22 0 20 60 W 10 10 2 1 NW35 115 W 10 987 P 01/16-00 22 0 19 64 W 10 1 106 W 9 874 P 01/16-01 22 0 18 67 W 9 1 97 W 9 762 P 01/16-02 22 0 18 70 W 8 8 2 1 NW29 88 W 8 649 P 01/16-03 22 0 17 70 W 9 1 87 W 9 679 P 01/16-04 22 0 17 69 W 10 1 85 W 9 708 P 01/16-05 0 0 17 68 W 9 9 2 1 N26 84 W 10 738 P 01/16-06 0 0 17 66 W 10 1 98 W 10 884 P 01/16-07 0 0 19 59 W 10 1 112 W 10 1030 P 01/16-08 0 0 24 49 W 10 10 2 1 N25 126 W 10 1176 P 01/16-09 0 0 29 39 W 9 1 521 W 9 3461 P 01/16-10 0 0 34 32 W 8 1 916 NW 8 5745 P 01/16-11 0 0 39 26 W 7 7 2 1 NW21 1311 NW 7 8030 P 01/16-12 0 0 43 22 W 7 1 2671 NW 8 22025 P 01/16-13 0 0 46 20 W 7 1 4030 NW 9 36020 P 01/16-14 0 0 47 19 W 7 7 3 1 NW22 5390 NW 10 50015 F 01/16-15 0 0 46 18 W 7 1 3951 NW 10 36166 P 01/16-16 0 0 44 20 W 8 1 2512 NW 9 22317 P 01/16-17 27 0 39 23 W 9 9 4 1 NW22 1073 W 9 8469 P 01/16-18 27 0 36 27 W 9 1 779 W 9 6204 P 01/16-19 27 0 33 31 W 10 1 485 W 9 3939 P 01/16-20 27 0 31 35 W 9 9 4 1 N25 191 W 10 1674 P 01/16-21 27 0 29 38 W 9 1 164 W 10 1450 P 01/16-22 27 0 27 42 W 9 1 137 W 10 1225 P 01/16-23 27 0 25 45 W 9 9 4 1 N22 111 W 10 1001 P 01/17-00 27 0 23 48 W 9 1 104 W 10 917 P 01/17-01 27 0 22 51 W 9 1 98 W 9 834 P 01/17-02 27 0 21 52 W 9 9 3 1 NW17 92 W 9 750 P 01/17-03 27 0 21 53 W 9 1 92 W 8 654 P 01/17-04 27 0 20 53 W 8 1 91 W 7 558 P 01/17-05 34 0 20 51 W 7 7 3 1 NW18 91 W 6 462 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...BAKER WFO BOULDER REQUESTED BY...KRIS HEINY REASON FOR REQUEST...PRESCRIBED .TAG 20090114.SHADE.01/BOU