EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 447 AM EDT Thu May 23 2013 VAZ014-232100- UPPER_CRAIG_CREEK PRESCRIBED BURN 37.33N 80.35W ELEV. 2000 FT 447 AM EDT Thu May 23 2013 DATE Thu 05/23/13 Fri 05/24/13 Sat 05/25/13 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 75 53 61 40 65 TEMP 64 61 68 72 74 67 61 58 56 55 58 60 60 54 48 45 43 46 55 61 64 57 DEWPT 60 61 62 60 59 58 56 54 51 48 41 36 33 32 32 33 33 32 31 31 33 35 MAX/MIN RH 60 90 34 71 31 RH 87100 81 66 59 73 84 86 83 77 53 41 36 43 54 62 67 58 40 32 31 43 WIND DIR SW SW SW SW W W W NW NW NW NW NW NW NW NW NW NW NW NW NW NW NW WIND SPD 6 4 4 5 6 8 9 9 12 13 18 19 18 16 12 9 8 8 10 13 11 8 WIND GUST 20 25 27 34 36 34 29 24 19 20 CLOUDS B2 OV B2 B2 B2 OV OV OV OV B2 B1 SC SC FW FW FW FW FW FW SC SC SC CLOUDS(%) 84100 85 77 82 91 99100 90 74 62 48 28 13 12 16 15 16 23 31 35 37 POP 12HR 80 30 20 0 5 RAIN SHWRS SC O NM NM NM SC IS SC SC IS IS TSTMS SC SC SC NM SC LAL 3 3 3 4 3 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 3 3 3 3 3 3 3 3 3 2 2 2 2 3 4 4 4 4 5 5 5 4 MIX HGT <1 <1 2 4 3 3 2 2 2 2 3 4 4 3 2 1 1 1 2 3 3 3 T WIND DIR SW W W W SW W W NW NW NW NW NW NW NW N N N NW NW NW NW NW T WIND SPD 16 11 10 10 13 17 21 25 29 36 39 33 32 34 34 27 23 21 18 17 17 14 DISPERSION PR PR PR PR FR GD FR PR PR PR ADI 18 21 28 34 44 23 28 34 39 84101102 88 50 44 22 18 46 56 45 45 13 MAX LVORI 5 9 4 3 3 3 5 5 4 3 1 1 1 1 2 2 3 2 1 1 2 2 DATE Sun 05/26/13 Mon 05/27/13 Tue 05/28/13 Wed 05/29/13 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 42 68 49 69 53 73 56 74 TEMP 48 48 64 62 53 53 66 64 57 58 70 68 60 60 71 69 DEWPT 37 40 40 44 42 48 52 55 53 54 58 57 55 57 56 58 RH 65 74 41 52 66 83 61 73 86 86 66 68 84 90 59 68 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS SC SC SC SC B1 B1 B2 B2 B1 B1 B1 B1 B1 B2 B1 B1 POP 12HR 5 5 10 30 20 40 20 20 RAIN SHWRS IS SC IS IS SC IS IS TSTMS IS IS 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