EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 932 PM EDT Tue May 21 2013 VAZ012-220900- RAWS 447502 37.01N 81.18W ELEV. 2540 FT 932 PM EDT Tue May 21 2013 DATE 05/21/13 Wed 05/22/13 Thu 05/23/13 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 61 81 59 72 51 TEMP 69 64 62 65 73 78 80 73 67 64 61 62 67 70 71 65 59 56 54 54 DEWPT 60 59 59 60 62 61 60 60 59 59 59 59 58 57 57 56 55 53 51 48 MIN/MAX RH 93 51 95 52 79 RH 73 84 90 84 68 56 51 64 75 84 93 90 73 63 61 73 87 90 90 80 WIND DIR S SW W SW SW S S S S S SW SW SW W W W W NW NW NW WIND SPD 2 2 2 1 5 9 8 8 6 5 5 5 9 11 11 11 10 10 12 14 CLOUDS B1 B1 B1 B1 B1 B2 B2 B1 B2 B2 B2 B2 B1 B1 B1 B1 B1 B2 B2 B1 CLOUDS(%) 60 58 54 57 59 70 75 67 78 72 74 79 66 53 55 60 68 74 75 69 POP 12HR 60 50 50 50 20 RAIN SHWRS NM IS IS SC SC SC SC SC SC SC SC SC SC SC SC IS IS IS IS IS TSTMS NM SC SC SC IS IS SC IS SC SC SC SC LAL 3 1 1 1 3 3 3 3 3 1 1 3 3 3 3 HAINES 4 5 5 4 3 3 4 3 3 4 4 3 3 4 4 3 MIX HGT <1 <1 <1 <1 4 6 6 5 1 <1 <1 2 5 7 8 5 T WIND DIR W W SW SW S SW SW SW SW SW S SW W W W W T WIND SPD 8 3 5 4 11 17 18 19 17 8 8 13 19 18 21 28 DISPERSION VP VP VP PR PR PR PR FR FR FR FR ADI 4 2 3 5 32 56 61 13 12 5 4 23 58 64 78 39 MAX LVORI 4 5 5 4 3 1 1 2 3 4 6 4 1 1 1 1 DATE 05/24 Sat 05/25/13 Sun 05/26/13 Mon 05/27/13 Tue 05/28/13 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 61 41 67 48 70 54 69 56 72 TEMP 60 57 47 47 62 60 52 53 67 65 57 57 67 65 59 60 70 68 DEWPT 41 42 40 40 41 47 44 47 50 53 52 53 56 56 54 55 59 59 RH 49 57 76 76 46 62 74 80 54 65 83 86 68 73 83 84 68 73 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 SC FW FW SC B1 B1 B1 B1 B1 B1 B2 B2 B2 B2 B1 B1 B1 POP 12HR 20 10 5 10 10 20 30 20 30 RAIN SHWRS IS IS IS SC SC IS IS SC SC TSTMS 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