EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 1013 PM EDT Tue Jun 18 2013 VAZ020-190900- RAWS 441801 37.99N 79.76W ELEV. 2160 FT 1013 PM EDT Tue Jun 18 2013 DATE 06/18/13 Wed 06/19/13 Thu 06/20/13 Fri 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 57 74 56 76 56 TEMP 63 61 59 61 68 72 73 68 62 60 58 61 68 72 74 69 63 60 58 60 DEWPT 60 59 58 59 60 59 58 56 55 54 54 55 56 56 56 56 56 57 57 57 MIN/MAX RH 100 60 92 53 100 RH 90 93 96 93 76 64 59 65 78 81 86 81 65 57 53 63 78 90 96 90 WIND DIR NW NW NW NW NW N E SE SE S S SE S S S S S S S S WIND SPD 4 6 4 2 3 4 3 2 1 1 1 1 3 5 4 3 2 0 0 2 CLOUDS SC SC SC SC SC B1 SC SC SC SC FW FW SC B1 B1 SC FW FW FW FW CLOUDS(%) 50 50 44 42 50 52 49 46 38 31 17 14 37 58 54 26 17 8 8 12 POP 12HR 30 30 10 20 10 RAIN SHWRS SC SC IS SC IS IS IS TSTMS IS IS LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 HAINES 3 3 3 3 3 4 4 3 3 3 3 2 2 3 3 3 MIX HGT 2 <1 <1 1 4 5 4 <1 <1 <1 <1 <1 4 4 5 2 T WIND DIR N N W N N N E SE SE S S SE S S SW S T WIND SPD 18 19 4 9 5 3 4 2 1 1 1 4 6 9 11 9 DISPERSION VP PR VP VP VP VP VP VP VP VP VP ADI 12 13 3 12 22 22 23 1 1 1 0 6 33 26 34 4 MAX LVORI 5 5 8 4 3 2 2 4 6 7 9 5 3 2 1 3 DATE 06/21 Sat 06/22/13 Sun 06/23/13 Mon 06/24/13 Tue 06/25/13 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 75 57 80 61 81 63 83 63 83 TEMP 72 69 61 63 76 73 65 66 78 75 67 68 80 76 68 68 80 76 DEWPT 57 58 59 59 62 64 61 61 64 65 63 63 64 66 63 63 65 67 RH 59 68 93 87 62 73 87 84 62 71 87 84 58 71 84 84 60 74 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS FW SC SC FW SC B1 SC FW SC B1 SC SC SC B1 SC SC SC B1 POP 12HR 20 10 20 10 20 10 30 20 30 RAIN SHWRS IS IS IS SC IS SC SC TSTMS IS IS IS SC SC 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; 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