EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 444 AM EST Tue Nov 24 2009 VAZ018-242100- RAWS 444002 37.52N 80.09W ELEV. 1266 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 58 43 56 39 56 TEMP 42 50 55 56 52 49 47 46 44 51 54 55 49 46 44 42 40 48 53 54 48 DEWPT 41 43 46 46 47 46 45 44 44 45 43 42 41 40 39 38 37 36 35 34 33 MAX/MIN RH 68 98 62 89 45 RH 96 77 72 69 83 89 93 93100 80 66 61 74 79 82 86 89 63 50 46 56 WIND DIR N NW E SE E E NE NE E S SW SW W W NW NW NW W W W W WIND SPD 2 2 2 4 2 1 1 0 1 3 4 3 2 2 2 3 3 4 5 6 8 CLOUDS OV B2 B2 B2 OV OV OV OV OV B2 B2 B1 SC SC B1 B1 B2 B2 B2 B2 B2 CLOUDS(%) 92 87 83 87 91 94 97 97 97 87 74 54 39 42 54 66 77 79 79 82 84 POP 12HR 10 10 20 20 30 DRIZZLE AR RAIN SHWRS 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 2 3 3 1 2 2 2 1 3 4 4 1 <1 <1 1 1 3 5 6 6 T WIND DIR NW N E E SE SE S S S SW W SW SW W W W W W W W W T WIND SPD 3 4 3 2 6 12 9 9 5 9 10 11 6 3 5 10 11 13 16 19 27 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 38 41 31 44 31 50 34 49 TEMP 43 38 40 37 34 32 42 38 35 32 47 43 39 35 47 44 DEWPT 30 28 28 27 26 25 23 27 25 26 26 28 28 29 30 32 RH 60 67 62 67 72 75 46 64 66 78 43 55 64 78 51 62 WIND SPD <15 <15 15> 15> 15> <15 <15 <15 AVG CLOUDS B2 B2 B2 B2 B1 B1 B1 SC SC SC FW SC SC SC B1 B1 POP 12HR 40 50 20 10 10 10 20 30 RAIN SHWRS SC SC SC SC IS 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