EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 315 PM EDT Sun May 19 2013 VAZ020-200900- BIG_WILSON_SOUTH PRESCRIBED BURN 37.92N 79.85W ELEV. 4200 FT 315 PM EDT Sun May 19 2013 DATE 05/19/13 Mon 05/20/13 Tue 05/21/13 Wed 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 58 76 61 78 61 TEMP 62 61 60 59 58 62 69 73 75 70 66 64 63 65 71 75 77 72 67 65 63 65 DEWPT 60 60 59 58 58 59 59 59 59 59 59 59 59 59 59 57 57 58 58 58 59 59 MIN/MAX RH 100 53 92 52 90 RH 93 97 96 96100 90 70 62 58 68 78 84 87 81 66 54 50 61 73 78 87 81 WIND DIR SE S S S SW SW W SW SW SW SW W W W W W W SW SW W W W WIND SPD 8 9 8 6 6 5 6 5 8 9 8 10 10 9 9 8 6 5 6 9 10 10 CLOUDS OV OV OV OV OV OV B2 B2 B2 B1 B1 B1 SC B1 B1 SC SC SC B1 B1 B1 B1 CLOUDS(%) 100100 97 94 94 93 86 77 71 66 56 51 47 52 52 41 37 50 54 53 54 56 POP 12HR 70 30 30 20 30 RAIN SHWRS NM NM SC SC SC SC SC SC SC SC IS IS IS IS IS SC SC SC SC SC TSTMS IS IS IS SC SC IS IS SC LAL 1 1 1 1 1 2 2 3 3 1 1 1 1 1 1 2 2 HAINES 3 3 3 3 3 3 3 3 3 3 4 5 4 3 4 3 3 3 MIX HGT <1 <1 <1 <1 <1 <1 1 2 2 <1 <1 <1 <1 <1 3 3 2 <1 T WIND DIR S S S S SW SW W NW W SW SW W NW W NW W S SW T WIND SPD 17 18 8 5 8 6 13 14 10 11 8 13 16 9 6 3 11 11 DISPERSION PR PR PR PR PR PR FR FR PR PR PR FR ADI 28 25 7 4 5 7 20 33 20 11 7 15 18 10 17 10 34 11 MAX LVORI 6 6 8 7 9 5 3 2 2 3 4 4 5 4 3 3 1 3 DATE 05/22 Thu 05/23/13 Fri 05/24/13 Sat 05/25/13 Sun 05/26/13 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 78 62 74 58 69 54 65 50 68 TEMP 76 73 66 65 72 69 62 61 68 64 57 56 63 60 54 54 65 63 DEWPT 61 62 62 62 59 60 58 58 53 54 52 49 45 49 45 46 45 50 RH 60 68 87 90 64 73 87 90 59 70 83 77 52 67 71 74 48 62 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 B1 B1 B1 B2 B2 B2 B1 B1 B1 B1 SC SC B1 SC SC B1 B1 POP 12HR 40 40 60 40 30 20 20 10 10 RAIN SHWRS SC SC SC SC NM NM SC SC SC SC IS IS IS IS TSTMS SC SC SC SC NM NM SC SC 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