EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 424 AM EDT Tue May 21 2013 VAZ012-212100- RAWS 447502 37.01N 81.18W ELEV. 2540 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 82 60 83 57 77 TEMP 61 62 72 78 81 75 69 65 63 63 73 79 81 74 67 63 60 62 70 74 76 69 DEWPT 58 61 62 61 60 59 59 57 57 58 61 60 59 59 58 57 56 57 58 57 57 56 MAX/MIN RH 49 88 47 95 52 RH 90 97 71 56 49 58 70 75 81 84 66 52 47 59 73 81 87 84 66 55 52 63 WIND DIR W W W W SW SW S SW SW S S S S S S S S SW SW W W W WIND SPD 3 3 8 5 6 5 3 3 3 3 6 9 8 6 5 4 3 4 9 12 11 8 CLOUDS B1 SC SC SC SC SC SC SC SC SC B1 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B1 CLOUDS(%) 57 46 42 40 50 50 42 35 40 40 54 66 75 80 82 78 67 57 57 60 59 57 POP 12HR 40 40 50 50 50 RAIN SHWRS IS SC SC IS IS IS SC SC SC SC SC SC SC SC SC SC SC SC SC TSTMS IS SC SC SC SC SC SC SC SC SC SC SC SC LAL 1 1 1 2 3 3 1 1 1 3 3 3 3 3 3 1 1 3 3 3 3 HAINES 4 4 5 5 5 5 4 4 4 5 5 5 4 3 3 4 3 3 4 5 4 3 MIX HGT <1 <1 3 6 5 4 2 <1 <1 <1 3 6 5 3 2 <1 <1 <1 4 7 6 5 T WIND DIR SW SW W W SW SW S S S S S SW S S S S SW SW SW W W W T WIND SPD 4 3 4 6 8 8 6 5 4 4 6 11 16 18 12 5 2 3 12 21 25 26 DISPERSION VP PR VP VP VP PR PR VP VP PR ADI 2 3 13 32 32 5 5 4 3 3 18 38 50 13 9 4 1 2 32 77 84 18 MAX LVORI 6 5 2 1 1 2 3 4 6 5 2 1 1 2 3 5 5 5 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 65 48 70 50 71 54 70 TEMP 60 57 62 61 52 53 66 63 54 54 67 65 58 57 67 65 DEWPT 52 43 51 50 47 46 46 50 47 48 52 54 52 52 54 54 RH 75 59 67 67 83 77 48 62 77 80 59 68 80 83 63 68 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 B1 B1 B1 SC FW FW SC SC B1 B1 B1 B1 B2 B2 B2 POP 12HR 40 30 20 10 5 10 10 30 RAIN SHWRS SC 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