FNUS75 KBOU 201630 CCA FWSBOU SPOT FORECAST FOR PINGREE HILL...USFS NATIONAL WEATHER SERVICE DENVER CO 911 AM MST THU JAN 20 2011 IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A COLD AND DRIER AIRMASS HAS SETTLED IN OVER THE REGION THIS MORNING WITH LITTLE MODERATION IN TEMPERATURES AND HUMIDITY ANTICIPATED THROUGH THE DAY...EVEN WITH STRONG NORTHWEST FLOW ALOFT. BY TONIGHT ANOTHER UPPER AIR DISTURBANCE CAUGHT UP IN THIS STRONG FLOW ALOFT IS EXPECTED TO DRIVE SOUTHEAST OVER THE AREA LATE TONIGHT AND FRIDAY MORNING. BEFORE ITS PASSAGE... EXPECT SURFACE/ 20-FOOT AND TRANSPORT WINDS TO STEADILY INCREASE OVERNIGHT...BECOMING QUITE STRONG AND GUSTY IN THE FRONT RANGE FOOTHILLS LATE TONIGHT THROUGH FRIDAY MORNING. FURTHERMORE SCATTERED SNOW SHOWERS ARE EXPECTED TO DEVELOP IN MOUNTAIN AREAS MAINLY ALONG AND WEST OF THE CONTINENTAL DIVIDE THIS EVENING. THESE MOUNTAIN SHOWERS AND THE VERY GUSTY WEST WINDS IN THE FOOTHILLS SHOULD LINGER THROUGH FRIDAY MORNING. ...THUNDERSTORMS IMPLY STRONG...GUSTY AND ERRATIC WINDS... .REST OF TODAY... SKY/WEATHER.........MOSTLY SUNNY. MAX TEMPERATURE.....22-25. MIN HUMIDITY........43%. 20-FOOT WINDS.......WEST WINDS 10-15 MPH WITH GUSTS TO 25 MPH...WITH HIGHER GUSTS TO AROUND 30 MPH LATE IN THE AFTERNOON. TRANSPORT WINDS.....WEST 25-38 MPH. MIXING HEIGHT.......1200 FT AGL RISING TO AROUND 2400 FT AGL AFTER 1300. SMOKE DISPERSAL.....POOR UNTIL 1000...THEN FAIR. HAINES INDEX........4 LOW. .TONIGHT... SKY/WEATHER.........PARTLY CLOUDY(30-40%) UNTIL 0300...THEN MOSTLY CLOUDY. BECOMING QUITE WINDY WITH AREAS OF BLOWING SNOW AFTER 2300. MIN TEMPERATURE.....16-20. MAX HUMIDITY........57-66%. 20-FOOT WINDS.......WEST-NORTHWEST WINDS 16-28 MPH WITH GUSTS TO 40 MPH IN THE EVENING AND AROUND 50 MPH AFTER MIDNIGHT. TRANSPORT WINDS.....WEST 45-55 MPH. MIXING HEIGHT.......1000-1200 FT AGL UNTIL 2200...THEN BELOW 1500 FT AGL UNTIL 0500...THEN 1000 FT AGL. SMOKE DISPERSAL.....FAIR UNTIL 1900...THEN POOR. HAINES INDEX........2 VERY LOW. .FRIDAY... SKY/WEATHER.........PARTLY CLOUDY(35-45%). WINDY IN THE MORNING. MAX TEMPERATURE.....29-34. MIN HUMIDITY........39-45%. 20-FOOT WINDS.......WEST WINDS 20-30 MPH WITH GUSTS TO 45 MPH UNTIL 1100...THEN NORTHWEST 10 TO 20 MPH WITH GUSTS AROUND 30 MPH IN THE AFTERNOON. TRANSPORT WINDS.....NORTHWEST 36-48 MPH. MIXING HEIGHT.......1200-2200 FT AGL UNTIL 1000...THEN 4000-5000 FT AGL UNTIL 1700...THEN 2200 FT AGL. SMOKE DISPERSAL.....POOR UNTIL 0900...THEN GOOD UNTIL 1000...THEN VERY GOOD UNTIL 1100...THEN EXCELLENT UNTIL 1500...THEN VERY GOOD UNTIL 1700...THEN GOOD. HAINES INDEX........3 VERY LOW. .FORECAST DAYS 3 THROUGH 5... .SATURDAY...MOSTLY CLOUDY. SLIGHT CHANCE OF SNOW AFTER 0600 UNTIL 1800...THEN CHANCE OF SNOW. LOWS AROUND 17. HIGHS IN THE LOWER 30S. WEST WINDS AROUND 22 MPH WITH GUSTS TO 45 MPH. .SUNDAY...PARTLY CLOUDY. CHANCE OF SNOW UNTIL 0600...THEN SLIGHT CHANCE OF SNOW AFTER 1800. LOWS AROUND 15. HIGHS IN THE UPPER 20S. WEST WINDS AROUND 17 MPH WITH GUSTS TO 30 MPH. .MONDAY...PARTLY CLOUDY. SLIGHT CHANCE OF SNOW UNTIL 0600...THEN CHANCE OF SNOW UNTIL 1800. LOWS AROUND 16. HIGHS IN THE MID 20S. NORTHWEST WINDS AROUND 14 MPH WITH GUSTS TO 25 MPH. FIRE WEATHER TABLE FOR PINGREE HILL. +++ 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 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 01/20-09 22 0 12 67 W 15 1 1195 W 28 30440 P 01/20-10 22 0 18 53 W 16 1 1631 W 30 43522 F 01/20-11 13 0 21 47 W 17 28 4 1 N54 2067 W 31 56605 F 01/20-12 13 0 21 47 W 17 1 1900 W 32 52393 F 01/20-13 13 0 21 46 W 18 1 1734 W 32 48182 F 01/20-14 23 0 22 44 W 18 30 3 1 NW55 1567 W 32 43970 F 01/20-15 23 0 22 43 W 18 1 1432 W 35 42880 F 01/20-16 23 0 21 43 W 20 1 1298 W 38 41789 F 01/20-17 19 0 21 44 W 21 33 2 1 NW58 1163 W 40 40699 F 01/20-18 19 0 20 45 W 23 1 1114 W 43 41047 F 01/20-19 19 0 20 46 W 26 1 1065 W 45 41396 F 01/20-20 39 0 19 47 W 29 46 2 1 NW58 1015 W 47 41744 F 01/20-21 39 0 19 49 W 30 1 903 W 48 37697 P 01/20-22 39 0 18 50 W 30 1 790 W 49 33650 P 01/20-23 51 7 18 51 W 30 48 2 1 NW55 678 W 51 29604 P 01/21-00 51 7 18 53 W 31 1 625 W 51 27336 P 01/21-01 51 7 18 54 W 32 1 571 W 51 25068 P 01/21-02 63 7 17 54 W 32 52 2 1 NW61 518 W 51 22800 P 01/21-03 63 7 17 55 W 31 1 673 W 49 28484 P 01/21-04 63 7 17 56 W 30 1 828 W 48 34169 P 01/21-05 44 1 17 58 W 29 46 2 1 NW58 983 W 47 39854 P 01/21-06 44 1 17 60 W 28 1 1024 W 45 39862 P 01/21-07 44 1 17 64 W 28 1 1065 W 44 39869 P 01/21-08 42 1 18 66 W 26 43 2 1 NW51 1107 W 41 39877 P 01/21-09 41 1 22 59 W 25 1 2474 W 41 90472 G 01/21-10 40 1 27 50 W 23 1 3841 NW 43 141067 V 01/21-11 37 0 31 46 W 22 35 2 1 NW66 5208 NW 43 191662 E 01/21-12 37 0 32 45 W 22 1 5360 NW 41 190378 E 01/21-13 37 0 31 47 W 22 1 5512 NW 39 189094 E 01/21-14 37 0 31 47 W 22 35 2 1 N82 5665 NW 38 187810 E 01/21-15 37 0 30 48 W 21 1 4515 NW 37 148088 V 01/21-16 37 0 27 54 W 20 1 3365 NW 37 108365 V 01/21-17 39 0 25 60 W 18 30 3 1 N78 2215 NW 36 68642 G 01/21-18 42 0 24 62 W 17 1 1829 W 35 55798 F 01/21-19 46 0 22 68 W 17 1 1150 W 32 34117 P 01/21-20 49 0 22 67 W 17 26 4 1 NW55 725 W 29 18313 P 01/21-21 53 0 22 68 W 18 1 670 W 30 17246 P 01/21-22 56 0 21 71 W 18 1 615 W 30 16179 P 01/21-23 58 0 21 69 W 20 30 3 1 NW44 560 W 31 15113 P 01/22-00 61 0 22 66 W 21 1 538 W 32 15121 P 01/22-01 64 0 22 66 W 22 1 515 W 33 15130 P 01/22-02 66 0 21 70 W 24 36 2 1 NW49 492 W 36 15138 P 01/22-03 69 0 21 68 W 25 1 433 W 36 13520 P 01/22-04 72 0 19 78 W 26 1 375 W 37 11901 P 01/22-05 73 18 19 77 W 28 41 2 1 W32 316 W 38 10283 P 01/22-06 74 18 19 79 W 29 1 303 W 37 9793 P 01/22-07 75 18 19 81 W 29 1 290 W 37 9304 P 01/22-08 76 18 19 81 W 29 43 2 1 W28 277 W 37 8815 P 01/22-09 77 18 23 69 W 28 1 1530 W 40 62495 G 01/22-10 78 18 29 57 W 28 1 2784 W 45 116174 V 01/22-11 78 24 32 50 W 26 40 2 1 W33 4038 W 48 169854 E 01/22-12 78 24 33 48 W 24 1 4553 W 43 165704 E 01/22-13 78 24 32 50 W 23 1 5068 NW 38 161554 E 01/22-14 78 24 32 49 W 21 30 3 1 W24 5583 NW 32 157404 E 01/22-15 78 24 31 51 NW 18 1 4975 NW 31 137454 V 01/22-16 78 24 26 62 NW 16 1 4366 NW 31 117504 V 01/22-17 78 30 22 73 NW 15 23 3 1 W32 3758 NW 30 97554 G 01/22-18 78 30 20 80 NW 15 1 3486 NW 29 87653 G 01/22-19 78 30 19 81 NW 15 1 3214 NW 28 77752 G 01/22-20 76 30 19 80 NW 15 23 3 1 NW29 2942 NW 26 67850 G 01/22-21 72 30 19 81 NW 15 1 3103 NW 29 76723 G 01/22-22 68 30 17 86 NW 15 1 3264 NW 30 85595 G 01/22-23 64 30 18 81 NW 15 23 3 1 NW28 3424 NW 32 94468 G 01/23-00 60 30 19 74 NW 15 1 3359 NW 33 97242 G 01/23-01 56 30 19 72 NW 16 1 3295 NW 35 100017 V 01/23-02 52 30 18 74 NW 17 25 3 1 NW41 3230 NW 37 102791 V 01/23-03 48 30 18 69 W 17 1 2892 NW 38 94463 G 01/23-04 44 30 14 80 W 18 1 2554 NW 39 86134 G 01/23-05 42 4 15 75 W 18 28 2 1 N44 2216 NW 40 77805 G 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...JOE PARR REASON FOR REQUEST...PRESCRIBED .TAG 20110120.PINGR.01/BOU