EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 444 AM EST Tue Nov 24 2009 VAZ020-242100- RAWS 441801 37.99N 79.76W ELEV. 2160 FT 444 AM EST Tue Nov 24 2009 DATE Tue 11/24/09 Wed 11/25/09 Thu 11/26/09 UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 EST 3HRLY 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 MAX/MIN TEMP 54 42 51 37 51 TEMP 42 49 53 53 49 47 46 45 43 47 50 50 45 42 41 40 38 45 49 50 44 DEWPT 40 42 46 47 48 46 44 43 42 43 42 41 40 39 38 37 36 35 34 33 32 MAX/MIN RH 75 97 71 93 52 RH 93 77 77 80 96 96 93 93 96 86 74 71 82 89 89 89 92 68 56 52 62 WIND DIR NW NW NE SE SE SE S S S SW SW SW SW W W W W W W W W WIND SPD 2 3 2 3 2 2 3 3 3 4 5 4 3 3 4 4 5 6 8 8 8 CLOUDS OV OV B2 OV OV OV OV OV OV OV B2 B1 SC SC B1 B2 B2 B2 B2 B2 OV CLOUDS(%) 96 91 85 89 93 95 99 97 95 89 79 58 42 46 59 72 82 83 82 86 89 POP 12HR 10 10 20 20 30 DRIZZLE AR RAIN SHWRS IS IS IS IS SC SC SC SC SC LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 MIX HGT <1 1 2 1 <1 1 2 2 1 2 2 2 <1 <1 <1 <1 <1 3 5 6 5 T WIND DIR S N SE SE SE SE S S S SW W S S W W W W W W W W T WIND SPD 0 3 4 3 9 8 8 6 4 9 11 8 5 3 6 10 10 17 17 21 25 DISPERSION VP VP VP VP VP VP VP VP PR DATE Fri 11/27/09 Sat 11/28/09 Sun 11/29/09 Mon 11/30/09 UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 EST 6HRLY 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 MIN/MAX TEMP 35 38 29 41 28 46 32 47 TEMP 40 35 37 34 32 30 39 36 32 30 44 40 36 33 45 42 DEWPT 30 28 28 27 25 24 23 25 23 24 24 26 27 26 29 31 RH 67 75 70 75 75 78 52 64 69 78 45 57 69 75 53 65 WIND SPD <15 15> 15> 15> 15> <15 <15 <15 AVG CLOUDS OV OV OV OV B2 B1 B1 SC SC FW FW SC SC SC B1 B1 POP 12HR 50 50 20 10 5 10 20 30 RAIN SHWRS SC SC SC SC IS IS IS SC SC SNOWSHWRS IS IS IS SC $$ BELOW IS A WEATHER ELEMENT KEY FOR THIS PRODUCT DAY 1 THROUGH 3... MAX/MIN TEMP or MIN/MAX TEMP(F).....MAXIMUM/MINIMUM AIR TEMPERATURE TEMP(F).............................AIR TEMPERATURE DEWPT(F)............................DEW POINT TEMPERATURE MIN/MAX RH or MAX/MIN RH(%).........MAXIMUM/MINIMUM HUMDITY RH(%)...............................RELATIVE HUMIDITY WIND DIR(8 POINT COMPASS)...........WIND DIRECTION WIND SPD(MPH).......................WIND SPEED CLOUDS(CAT).........................CLOUD COVER CATEGORY EXAMPLE: CL = CLEAR; FW = FEW; SC = SCATTERED; BK = BROKEN; OV = OVERCAST CLOUDS(%)...........................CLOUD COVER AS A PERCENTAGE POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION WEATHER... TYPE... RAIN...........RAIN RAIN SHWRS.....RAIN SHOWERS TSTMS..........THUNDERSTORMS DRIZZLE........DRIZZLE SNOW...........SNOW SNOWSHWRS......SNOW SHOWERS SLEET..........SLEET FRZG RAIN......FREEZING RAIN FRZG DRZL......FREEZING DRIZZLE COVERAGE... IS.............ISOLATED SC.............SCATTERED NM.............NUMEROUS O..............OCCASIONAL S..............SLIGHT CHANCE C..............CHANCE L..............LIKELY WD.............WIDESPREAD D..............DEFINITE AR.............AREAS PA.............PATCHY LAL(CAT)............................LIGHTNING ACTIVITY LEVEL HAINES(CAT).........................HAINES INDEX MIX HGT(THOUSANDS OF FT AGL)........MIXING HEIGHT EXAMPLE: 6 = 6000 FEET; 12 = 12000 FEET; <1 = LESS THAN 1000 FOOT T WIND DIR(8 POINT COMPASS).........TRANSPORT WIND DIRECTION T WIND SPD(MPH).....................TRANSPORT WIND SPEED DISPERSION(CATEGORY)................SMOKE DISPERSION CATEGORY VALUES: VP =VERY POOR;PR = POOR; FR = FAIR; GD = GOOD; DAY 4 THROUGH 7... MAX/MIN TEMP or MIN/MAX TEMP(F).....MAXIMUM/MINIMUM AIR TEMPERATURE TEMP(F).............................AIR TEMPERATURE DEWPT(F)............................DEW POINT TEMPERATURE RH(%)...............................RELATIVE HUMIDITY WIND SPD(MPH).......................WIND SPEED EXAMPLE: <15 = LESS THAN 15 MPH; 15> = 15 MPH OR GREATER AVE CLOUDS(CAT).....................AVERAGE CLOUD COVER CATEGORY POP 12HR(%).........................PROBABILITY FOR ACCUMULATING PRECIPITATION WEATHER... SEE DAY 1 THROUGH 3 WEATHER DESCRIPTIONS