EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 327 PM EDT Fri May 24 2013 NCZ019-250900- RAWS 312001 36.23N 81.32W ELEV. 2380 FT 327 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 41 69 45 69 51 TEMP 61 55 49 46 43 47 58 64 68 61 54 50 48 50 60 65 68 63 58 55 53 56 DEWPT 33 33 32 31 30 32 30 27 28 32 34 36 37 38 39 40 41 43 44 45 45 46 MIN/MAX RH 65 22 73 37 79 RH 35 43 52 55 60 56 34 24 22 33 46 58 65 63 46 40 37 48 59 69 74 69 WIND DIR NW NW NW NW NW NW NW NW NW NW NW NW NW NW W W W SW W NW NW S WIND SPD 16 6 6 10 13 11 5 9 10 6 5 4 4 3 3 4 4 2 1 2 2 1 CLOUDS CL FW CL CL CL CL FW FW B1 SC SC B2 B2 B1 B1 B1 B1 B1 B1 B1 B2 B2 CLOUDS(%) 0 8 0 0 2 4 6 11 56 36 47 70 72 64 62 59 53 53 59 67 70 70 POP 12HR 0 0 10 5 5 LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 3 3 4 4 4 5 4 4 5 5 5 5 5 3 2 3 4 3 MIX HGT 4 4 <1 <1 <1 <1 3 4 5 3 1 <1 <1 <1 3 4 5 1 T WIND DIR NW NW N N NW N NW NW NW NW NW N N N NW W W W T WIND SPD 26 26 14 13 13 13 12 13 19 14 14 11 9 9 6 9 9 4 DISPERSION PR PR FR FR PR PR VP VP VP VP VP VP ADI 71 12 7 9 13 15 37 52 57 7 10 8 6 7 25 28 28 2 MAX LVORI 1 2 2 2 2 2 1 1 1 2 2 3 3 3 2 2 2 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 74 56 79 59 82 61 84 62 85 TEMP 70 68 60 61 75 72 64 65 78 75 66 66 80 77 67 67 81 77 DEWPT 49 53 54 56 57 59 57 58 59 61 58 60 60 62 60 62 60 63 RH 47 59 81 84 54 64 78 78 52 62 75 81 51 60 78 84 49 62 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B2 B2 B1 B1 B1 B1 SC SC SC SC SC FW SC SC FW FW SC SC POP 12HR 30 30 20 10 20 5 10 5 10 RAIN SHWRS SC SC IS IS IS 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