EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 944 AM EDT Mon May 20 2013 NCZ001-202100- RAWS 310101 36.42N 81.29W ELEV. 3000 FT 944 AM EDT Mon May 20 2013 DATE Mon 05/20/13 Tue 05/21/13 Wed 05/22/13 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 73 61 80 60 78 TEMP 66 69 71 68 65 64 62 65 73 77 79 73 67 64 62 64 71 75 77 71 DEWPT 61 60 61 61 60 59 58 60 62 60 59 60 60 59 58 60 61 60 59 60 MAX/MIN RH 69 90 51 95 55 RH 84 73 71 78 84 84 87 84 68 56 50 64 78 84 87 87 71 60 54 68 WIND DIR W W SW SW SW W NW W W W SE S SW SW S S S S S S WIND SPD 5 4 6 3 1 2 2 1 8 4 5 2 2 1 1 1 5 6 4 2 CLOUDS OV B2 B2 B2 B1 SC B1 B1 B1 B2 B2 B2 B1 B1 B1 B1 B1 B1 B1 B1 CLOUDS(%) 91 75 70 75 56 47 51 55 64 70 76 71 54 54 55 55 57 60 61 62 POP 12HR 50 30 40 30 30 RAIN SHWRS SC SC SC SC IS SC SC SC SC IS IS IS SC SC SC TSTMS IS SC SC SC SC SC SC IS IS IS SC SC SC LAL 2 3 3 3 1 1 1 1 1 3 3 3 2 1 1 2 2 3 3 HAINES 3 3 3 3 3 3 3 4 5 5 4 3 3 4 4 4 4 3 3 3 MIX HGT 1 2 1 <1 <1 <1 <1 <1 2 4 3 2 <1 <1 <1 <1 2 4 3 2 T WIND DIR W NW W SW W W W W NW N W S SW SW SW SW SW SW SW S T WIND SPD 9 11 9 4 3 2 1 1 2 5 11 14 8 1 4 10 9 8 11 17 DISPERSION VP VP VP VP VP VP VP VP VP ADI 15 24 13 3 1 1 0 1 5 15 27 7 4 1 2 8 19 22 28 8 MAX LVORI 4 3 2 3 5 6 6 6 3 2 2 3 4 6 6 5 3 2 2 3 DATE Thu 05/23/13 Fri 05/24/13 Sat 05/25/13 Sun 05/26/13 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 59 74 57 70 55 65 54 67 TEMP 63 62 72 69 61 60 68 65 58 57 63 61 56 57 65 63 DEWPT 58 58 55 54 52 52 55 54 51 50 49 51 46 47 49 51 RH 84 87 55 59 72 75 63 68 77 77 60 70 69 69 56 65 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 B1 B2 B1 B1 B1 B1 B1 SC SC SC B1 SC B1 B1 B1 POP 12HR 30 30 10 40 20 20 20 10 RAIN SHWRS SC IS SC SC SC SC IS IS IS IS IS IS TSTMS SC SC SC SC SC 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