EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 1014 PM EDT Fri May 24 2013 VAZ020-250900- BIG_WILSON_CREEK PRESCRIBED BURN 37.95N 79.80W ELEV. 1850 FT 1014 PM EDT Fri May 24 2013 DATE 05/24/13 Sat 05/25/13 Sun 05/26/13 Mon UTC 3HRLY 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 EDT 3HRLY 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 MIN/MAX TEMP 31 63 38 70 40 TEMP 44 38 34 41 52 58 62 54 47 43 41 45 58 65 68 60 51 47 44 47 DEWPT 26 28 28 28 28 26 27 31 32 33 33 34 35 34 33 33 34 34 34 36 MIN/MAX RH 75 27 81 27 77 RH 49 67 78 59 39 29 26 41 56 67 73 65 42 31 27 36 52 60 68 65 WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW WIND SPD 10 8 8 11 12 14 16 11 6 2 2 2 6 8 8 4 4 3 1 0 CLOUDS CL CL FW SC SC SC CL CL CL FW FW FW FW CL CL CL CL FW FW FW CLOUDS(%) 2 0 14 35 28 36 0 4 2 8 12 13 9 0 0 2 5 9 9 17 POP 12HR 0 0 0 0 5 LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 3 4 4 4 4 4 4 4 3 3 4 3 3 4 4 4 MIX HGT <1 <1 <1 1 3 4 5 2 <1 <1 <1 <1 3 5 6 2 T WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW T WIND SPD 10 8 8 14 18 19 21 17 9 8 8 5 17 12 10 6 DISPERSION FR PR PR FR PR VP VP VP VP VP VP ADI 9 6 5 22 44 52 66 12 4 4 4 6 63 53 46 3 MAX LVORI 2 3 3 2 1 1 1 2 3 3 3 3 1 1 1 2 DATE 05/27 Tue 05/28/13 Wed 05/29/13 Thu 05/30/13 Fri 05/31/13 UTC 6HRLY 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 EDT 6HRLY 14 20 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 MAX/MIN TEMP 71 54 77 58 81 60 84 61 85 TEMP 66 65 56 59 73 71 63 64 78 74 65 66 80 76 66 66 81 77 DEWPT 44 50 53 54 57 60 58 58 59 62 59 60 61 64 61 61 62 66 RH 45 58 90 83 57 68 84 81 52 66 81 81 52 66 84 84 53 69 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS SC B1 B1 B1 B1 B1 B1 B1 B1 SC SC SC SC SC SC FW SC SC POP 12HR 20 30 30 10 20 10 10 5 10 RAIN SHWRS IS IS SC SC SC IS IS TSTMS IS IS IS IS IS IS $$ 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; ADI (INDEX).........................ATMOSPHERIC DISPERSION INDEX MAX LVORI (INDEX)...................LOW VISIBILITY OCCURRENCE RISK INDEX 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