EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE BLACKSBURG VA 944 AM EDT Mon May 20 2013 VAZ018-202100- RAWS 444002 37.52N 80.09W ELEV. 1266 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 78 63 84 65 82 TEMP 70 74 76 72 68 66 65 68 76 81 83 78 72 69 67 69 76 80 82 76 DEWPT 63 63 63 64 63 62 61 61 63 61 59 60 60 59 58 60 62 61 60 61 MAX/MIN RH 65 90 44 80 49 RH 78 69 64 76 84 87 87 78 64 51 44 54 66 70 73 73 62 52 47 60 WIND DIR W SW S S SW W NW NW W S S S S W NW SE SE S S S WIND SPD 2 4 5 4 1 2 2 3 4 2 8 6 2 2 1 1 4 6 6 5 CLOUDS B2 SC B2 B1 B1 B1 B1 B1 SC B1 B1 B1 SC SC B1 B1 B1 B1 B1 B1 CLOUDS(%) 71 46 70 65 55 54 55 56 47 53 59 54 49 50 54 55 56 60 61 61 POP 12HR 50 30 30 20 30 RAIN SHWRS SC SC SC SC IS IS SC SC IS IS IS SC SC IS TSTMS IS SC SC SC SC SC IS IS IS SC SC IS LAL 2 3 3 3 1 1 1 1 1 3 3 2 1 1 1 2 2 3 3 HAINES 3 3 3 3 3 3 3 3 3 3 4 4 4 4 5 5 5 5 4 3 MIX HGT 3 4 3 2 1 <1 1 1 3 5 3 1 1 <1 1 1 3 5 5 4 T WIND DIR SW SW SW S S SW W W W W SW S SW SW SW S SW SW SW S T WIND SPD 5 5 4 4 5 5 5 4 5 6 10 12 10 6 5 5 6 8 12 17 DISPERSION VP VP VP VP PR VP VP VP PR ADI 17 15 11 3 2 3 3 7 17 27 25 8 4 3 2 11 16 27 36 12 MAX LVORI 3 2 2 3 4 5 6 4 2 2 2 2 3 3 3 3 2 2 1 2 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 64 82 56 78 56 72 53 76 TEMP 68 68 79 73 62 61 75 71 61 60 70 66 58 59 72 69 DEWPT 59 59 57 55 52 52 57 55 52 50 49 51 45 48 48 52 RH 73 73 47 53 70 72 54 57 72 69 47 58 62 67 42 55 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 B1 B1 B2 B2 B1 B1 B1 B1 SC SC B1 SC SC B1 B1 POP 12HR 20 40 20 30 20 20 10 10 RAIN SHWRS IS IS SC SC IS SC SC IS IS IS IS TSTMS IS SC SC SC 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