EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 334 PM EDT Sat May 18 2013 WVZ043-190900- RAWS 465401 37.53N 81.00W ELEV. 2725 FT 334 PM EDT Sat May 18 2013 DATE 05/18/13 Sun 05/19/13 Mon 05/20/13 Tue 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 59 73 60 79 64 TEMP 71 67 64 62 61 62 68 71 72 69 65 63 62 64 72 76 79 74 70 68 66 69 DEWPT 60 59 59 59 58 59 60 60 59 59 58 58 57 58 60 59 59 59 60 60 61 62 MIN/MAX RH 95 60 88 50 88 RH 68 75 84 90 90 90 76 68 64 70 78 84 84 81 66 56 50 59 71 76 84 78 WIND DIR SE SE SE SE SE S S S S S SW S SW SW W W SW S SW W W W WIND SPD 8 8 8 6 5 4 5 5 5 5 4 4 4 4 5 5 3 5 6 6 5 5 CLOUDS OV OV OV OV OV B2 B2 B2 B2 OV B2 OV B2 B2 B2 B1 SC B1 SC SC B1 SC CLOUDS(%) 90100100100 88 82 81 81 82 88 86 88 87 87 72 55 50 53 42 43 54 48 POP 12HR 70 80 60 30 20 RAIN SHWRS O NM NM SC SC NM SC NM O NM SC SC SC SC SC SC SC IS IS IS IS IS TSTMS IS IS IS IS IS IS IS IS IS SC SC SC SC SC IS LAL 2 2 2 2 2 2 2 2 2 3 1 1 1 3 3 3 3 HAINES 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 MIX HGT 3 3 2 1 <1 <1 2 2 3 2 <1 <1 <1 <1 3 3 3 <1 T WIND DIR S SE S S SE S SW SW SW SW SW S SW SW W W SW S T WIND SPD 23 26 26 19 11 9 8 9 11 13 13 13 12 10 14 13 10 5 DISPERSION PR PR PR PR PR VP VP VP PR PR PR PR ADI 58 36 35 17 8 10 16 19 27 9 9 10 9 11 38 35 36 4 MAX LVORI 1 3 4 4 5 5 3 3 2 3 4 4 4 4 3 1 1 3 DATE 05/21 Wed 05/22/13 Thu 05/23/13 Fri 05/24/13 Sat 05/25/13 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 85 64 85 64 80 61 77 58 63 TEMP 82 78 70 69 82 78 69 68 77 73 65 65 75 71 63 59 62 61 DEWPT 61 62 62 63 63 63 62 62 61 61 59 59 57 57 56 55 54 55 RH 49 58 76 81 53 60 78 81 58 66 81 81 54 61 78 87 75 81 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS SC SC SC SC SC B1 B1 B1 B2 B2 B2 B1 B1 B1 B1 SC B1 B1 POP 12HR 20 30 40 40 50 30 40 30 30 RAIN SHWRS IS IS SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC TSTMS IS IS SC SC SC SC SC SC SC SC SC IS 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