EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 424 AM EDT Tue May 21 2013 VAZ020-212100- RAWS 441801 37.99N 79.76W ELEV. 2160 FT 424 AM EDT Tue May 21 2013 DATE Tue 05/21/13 Wed 05/22/13 Thu 05/23/13 UTC 3HRLY 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 EDT 3HRLY 05 08 11 14 17 20 23 02 05 08 11 14 17 20 23 02 05 08 11 14 17 20 MAX/MIN TEMP 86 62 83 62 76 TEMP 60 64 75 81 85 78 71 67 65 68 76 80 82 76 70 67 65 65 71 74 75 69 DEWPT 58 61 63 61 59 60 60 58 58 58 60 58 58 59 58 57 56 57 57 59 61 61 MAX/MIN RH 43 84 43 81 59 RH 93 90 66 51 41 54 68 73 78 70 58 47 44 56 66 70 73 75 61 59 62 76 WIND DIR W W W S S SW SW W W SW SW S S S S S SW SW SW SW SW W WIND SPD 2 3 4 3 6 5 4 3 2 2 6 8 6 5 4 4 4 4 8 10 8 5 CLOUDS SC SC B1 SC B1 B1 B1 B1 SC SC SC SC SC B2 B2 B2 OV B2 B2 B1 B1 B2 CLOUDS(%) 37 38 56 50 53 56 54 52 50 44 30 27 48 74 83 85 88 85 70 57 64 73 POP 12HR 30 30 50 50 40 RAIN SHWRS IS SC SC SC IS IS IS SC SC SC SC SC SC SC SC SC SC SC TSTMS IS SC SC SC IS IS SC SC SC SC SC SC SC SC LAL 1 1 1 2 3 3 3 1 1 2 2 3 3 3 3 1 1 3 3 3 3 HAINES 3 3 3 4 5 5 5 4 4 5 5 5 4 3 4 5 5 4 3 3 3 3 MIX HGT <1 <1 3 6 4 2 1 <1 <1 <1 3 5 4 3 2 <1 1 2 4 6 5 4 T WIND DIR W W W W SW S SW SW SW SW SW S S S S S SW SW SW SW W W T WIND SPD 2 3 4 5 8 10 9 8 5 4 8 12 14 16 12 10 9 11 16 20 20 18 DISPERSION VP PR VP VP VP PR VP VP VP PR ADI 1 3 11 19 22 7 7 4 3 5 20 40 43 7 9 4 4 24 43 66 60 12 MAX LVORI 7 6 3 2 2 2 3 3 3 3 2 1 1 3 3 3 4 3 1 1 1 2 DATE Fri 05/24/13 Sat 05/25/13 Sun 05/26/13 Mon 05/27/13 UTC 6HRLY 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 EDT 6HRLY 02 08 14 20 02 08 14 20 02 08 14 20 02 08 14 20 MIN/MAX TEMP 54 69 49 71 49 71 54 69 TEMP 59 58 64 64 54 54 67 64 54 54 68 65 58 57 67 65 DEWPT 52 48 50 50 47 46 44 50 47 48 49 53 52 53 52 54 RH 78 69 60 60 77 74 43 60 77 80 51 65 80 86 59 68 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B2 B1 SC SC FW FW FW SC SC B1 B1 B1 B1 B2 B2 B2 POP 12HR 40 20 20 5 5 10 10 30 RAIN SHWRS SC SC IS IS SC SC TSTMS 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