FNUS75 KBOU 191127 FWSBOU SPOT FORECAST FOR PORTER RANCH 5...USFS NATIONAL WEATHER SERVICE DENVER CO 424 AM MST FRI FEB 19 2010 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A MOIST WESTERLY FLOW ALOFT WILL REMAIN OVER THE REGION. A SLIGHT CHANCE OF SNOW WILL CONTINUE THROUGH TODAY...WITH A BETTER CHANCE TONIGHT. SNOW WILL RETURN BY SATURDAY AFTERNOON AND CONTINUE INTO SATURDAY NIGHT...WHEN SOME ACCUMULATIONS WILL BE LIKELY. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .TODAY... SKY/WEATHER.........CLOUDY. SLIGHT CHANCE OF SNOW. MAX TEMPERATURE.....25-30. MIN HUMIDITY........62-67%. WIND (20 FT)........SOUTHWEST 5-10 MPH UNTIL 1200...THEN SOUTHEAST AROUND 4 MPH UNTIL 1500...THEN SOUTHWEST. TRANSPORT WINDS.....SOUTHWEST 4-12 MPH. MIXING HEIGHT.......3000-4000 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .TONIGHT... SKY/WEATHER.........CLOUDY. SLIGHT CHANCE OF SNOW UNTIL 2300...THEN CHANCE OF SNOW. MIN TEMPERATURE.....11. MAX HUMIDITY........100%. WIND (20 FT)........WEST 6-10 MPH. TRANSPORT WINDS.....WEST 4-8 MPH. MIXING HEIGHT.......400-1400 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .SATURDAY... SKY/WEATHER.........CLOUDY. CHANCE OF SNOW UNTIL 1100...THEN SNOW LIKELY. ACCUMULATIONS OF 2 TO 4 INCHES. MAX TEMPERATURE.....23-27. MIN HUMIDITY........87-92%. WIND (20 FT)........SOUTHWEST 5-6 MPH UNTIL 0900...THEN SOUTHEAST 6-10 MPH. TRANSPORT WINDS.....SOUTH 4-12 MPH. MIXING HEIGHT.......1800-2800 FT AGL. SMOKE DISPERSAL.....POOR. HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME DOMINATED FIRE GROWTH. .FORECAST DAYS 3 THROUGH 5... .SUNDAY...SNOW UNTIL 0600...THEN CHANCE OF SNOW. LOWS AROUND 12. HIGHS IN THE LOWER 20S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .MONDAY...PARTLY CLOUDY. CHANCE OF SNOW UNTIL 0600...THEN SLIGHT CHANCE OF SNOW UNTIL 1800. LOWS AROUND 12. HIGHS IN THE LOWER 20S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. .TUESDAY...PARTLY CLOUDY. LOWS AROUND 15. HIGHS IN THE UPPER 20S. TYPICAL SLOPE/VALLEY WINDS LESS THAN 10 MPH. EXPERIMENTAL FIRE WEATHER TABLE FOR PORTER RANCH 5. +++ 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 02/19-04 98 15 16 95 W 3 1 1556 W 9 12744 P 02/19-05 89 20 16 66 W 6 6 2 1 W25 1226 SW 6 6358 P 02/19-06 89 20 16 69 W 7 1 1380 SW 6 7320 P 02/19-07 89 20 17 72 W 8 1 1535 SW 6 8282 P 02/19-08 97 20 18 71 W 7 7 3 1 W33 1690 SW 6 9244 P 02/19-09 97 20 20 69 W 6 1 2386 SW 7 14188 P 02/19-10 97 20 21 68 SW 3 1 3083 SW 7 19133 P 02/19-11 97 20 23 66 SW 2 2 3 1 W40 3779 SW 7 24077 P 02/19-12 97 20 24 64 CALM 1 4139 SW 8 30024 P 02/19-13 97 20 24 63 SE 2 1 4498 SW 9 35971 P 02/19-14 97 20 25 62 E 3 3 3 1 W43 4858 SW 10 41918 F 02/19-15 97 20 24 63 SE 5 1 4043 W 9 33976 P 02/19-16 97 20 23 65 SW 7 1 3229 W 9 26034 P 02/19-17 95 25 21 70 W 8 8 3 1 W46 2415 W 8 18092 P 02/19-18 95 25 20 75 W 8 1 1765 W 7 12751 P 02/19-19 95 25 18 80 W 7 1 1115 W 6 7410 P 02/19-20 95 25 17 85 W 6 6 3 1 W51 465 W 5 2069 P 02/19-21 95 25 16 90 W 6 1 410 W 5 1781 P 02/19-22 95 25 15 94 W 6 1 355 W 5 1493 P 02/19-23 97 40 14 96 W 6 6 3 1 W55 301 W 5 1206 P 02/20-00 97 40 13 100 W 6 1 286 SW 5 1176 P 02/20-01 97 40 13 100 W 6 1 271 SW 5 1147 P 02/20-02 97 40 12 100 W 6 6 3 1 W52 256 SW 5 1118 P 02/20-03 97 40 12 100 W 7 1 255 SW 5 1098 P 02/20-04 97 40 12 100 W 8 1 255 SW 5 1078 P 02/20-05 95 50 12 96 W 7 7 2 1 W60 178 W 7 1088 P 02/20-06 95 50 11 100 W 5 1 206 SW 6 981 P 02/20-07 95 50 12 100 SW 3 1 233 SW 5 873 P 02/20-08 95 50 15 98 SW 3 3 2 1 W51 261 SW 3 765 P 02/20-09 95 50 18 90 S 5 1 843 S 5 3859 P 02/20-10 95 50 21 89 SE 6 1 1426 S 5 6953 P 02/20-11 95 70 22 90 SE 7 7 2 1 SW44 2009 S 6 10046 P 02/20-12 95 70 23 90 SE 8 1 2315 S 7 14560 P 02/20-13 95 70 23 91 SE 8 1 2621 S 8 19074 P 02/20-14 95 70 23 90 SE 8 8 3 1 W41 2927 S 9 23588 P 02/20-15 95 70 23 90 E 7 1 2687 S 8 20027 P 02/20-16 95 70 22 89 E 5 1 2448 S 8 16467 P 02/20-17 99 92 21 92 E 3 3 3 1 W37 2208 S 7 12906 P 02/20-18 99 92 18 98 E 3 1 1781 S 6 9239 P 02/20-19 99 92 16 96 E 5 1 1354 S 3 5572 P 02/20-20 99 92 15 96 E 6 6 3 1 W31 928 S 2 1905 P 02/20-21 99 92 16 94 E 6 1 1113 S 2 2640 P 02/20-22 99 92 15 94 E 6 1 1298 S 3 3374 P 02/20-23 99 92 15 96 E 6 6 3 1 W29 1483 S 3 4109 P 02/21-00 99 92 15 97 E 6 1 1491 S 3 4911 P 02/21-01 99 92 14 96 E 6 1 1498 S 5 5713 P 02/21-02 99 92 14 96 E 6 6 3 1 SW32 1506 S 5 6515 P 02/21-03 99 92 13 96 E 7 1 1609 S 6 7474 P 02/21-04 99 92 13 93 E 7 1 1712 S 6 8433 P 02/21-05 93 45 12 93 E 8 8 3 1 SW29 1816 S 6 9393 P 02/21-06 93 45 12 97 E 8 1 2114 S 6 11075 P 02/21-07 93 45 12 100 NE 7 1 2413 W 6 12758 P 02/21-08 93 45 15 94 NE 7 7 3 1 W30 2711 W 6 14441 P 02/21-09 93 45 18 88 E 7 1 3073 W 9 25811 P 02/21-10 93 45 20 86 E 6 1 3434 W 12 37181 P 02/21-11 93 45 21 86 SE 6 6 3 1 W37 3796 W 15 48551 F 02/21-12 93 45 21 85 E 5 1 3870 W 18 61776 G 02/21-13 93 45 21 83 NE 5 1 3945 W 22 75001 G 02/21-14 93 45 22 79 N 3 3 3 1 W48 4019 W 25 88226 G 02/21-15 93 45 21 76 NE 3 1 3778 W 23 77658 G 02/21-16 93 45 21 74 E 3 1 3537 W 22 67090 G 02/21-17 86 36 19 77 SE 3 3 3 1 W43 3295 W 20 56522 F 02/21-18 86 36 17 85 SE 3 1 2876 W 15 41540 F 02/21-19 86 36 16 88 SE 3 1 2456 W 12 26557 P 02/21-20 86 36 15 92 SE 3 3 3 1 W40 2037 SW 7 11575 P 02/21-21 86 36 15 91 SE 3 1 2084 SW 7 13600 P 02/21-22 86 36 15 91 SE 3 1 2132 SW 8 15625 P 02/21-23 86 36 15 90 SE 3 3 3 1 W48 2179 SW 9 17651 P 02/22-00 86 36 14 90 E 3 1 1901 SW 10 16239 P 02/22-01 86 36 14 88 NE 2 1 1622 W 10 14827 P 02/22-02 86 36 13 88 N 2 2 3 1 W51 1343 W 12 13415 P 02/22-03 86 36 13 89 N 3 1 1106 W 13 11898 P 02/22-04 86 36 12 89 NW 5 1 868 W 15 10381 P 02/22-05 51 21 12 89 W 6 6 3 W47 631 W 16 8864 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 20100219.PORTE.01/BOU