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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE Blacksburg VA 731 PM EST Sat Dec 21 2024 VAZ024-220900- RAWS 441631 37.63N 79.51W Elev. 865 ft 731 PM EST Sat Dec 21 2024 Date 12/21/24 Sun 12/22/24 Mon 12/23/24 Tue UTC 3hrly 21 00 03 06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 EST 3hrly 16 19 22 01 04 07 10 13 16 19 22 01 04 07 10 13 16 19 22 01 04 07 MIN/MAX TEMP 18 36 17 40 24 TEMP 25 22 19 18 26 35 35 27 24 22 19 18 26 38 40 32 27 25 25 25 DEWPT 12 12 11 11 12 10 9 11 11 11 11 11 14 16 17 17 17 17 18 19 MIN/MAX RH 75 32 74 38 78 RH 57 65 70 73 55 35 33 50 57 62 70 73 60 40 39 53 65 71 74 78 WIND DIR NW NW NW N N S SE SE SE SE N N S S S S S W W W WIND SPD 4 3 3 2 2 1 2 1 2 2 0 0 2 3 3 1 1 1 1 1 CLOUDS SC SC FW CL CL CL CL FW FW FW FW CL CL FW CL FW FW FW SC B1 CLOUDS(%) 47 33 9 4 3 3 1 10 7 6 8 3 3 7 4 7 11 21 42 54 VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 POP 12HR 0 0 0 0 0 LAL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 HAINES 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 MIX HGT 1 1 1 1 3 4 3 <1 <1 <1 <1 <1 2 3 2 <1 T WIND DIR NW NW NW NW N NW NW SE SE E SE SE S S S S T WIND SPD 12 10 8 6 3 2 2 2 3 3 2 2 6 8 9 4 DISPERSION VP VP VP VP VP VP VP VP VP VP VP ADI 6 5 4 10 12 10 9 1 2 2 1 2 19 29 26 2 MAX LVORI 3 3 3 3 2 2 2 2 3 3 3 3 2 2 2 2 STABILITY F G G B B B B G G G G B B B B G CEILING None None None None None None None None None STA PRES 28.75 28.79 28.86 28.85 28.92 28.94 28.94 28.86 Date 12/24Wed 12/25/24Thu 12/26/24Fri 12/27/24Sat 12/28/24 UTC 6hrly 18 00 06 12 18 00 06 12 18 00 06 12 18 00 06 12 18 00 EST 6hrly 13 19 01 07 13 19 01 07 13 19 01 07 13 19 01 07 13 19 MAX/MIN TEMP 52 29 47 31 49 34 50 37 52 TEMP 49 42 33 30 46 41 34 32 47 42 36 34 48 44 40 38 50 47 DEWPT 32 32 31 30 36 34 32 32 36 35 33 34 39 37 36 35 39 39 RH 52 67 92100 68 76 92100 65 76 89100 71 76 85 89 66 74 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 SC SC SC B1 B1 B2 B1 B1 SC B1 B1 B2 B2 B2 B2 B2 B2 POP 12HR 0 5 10 20 20 20 40 40 40 RAIN SHWRS IS IS IS IS IS SC SC SC SC SC SC SNOWSHWRS IS IS IS $$ This product is for planning and review purposes only and is not to be substituted for an official fire weather spot forecast. The data displayed are calculated from a 2.5 by 2.5 km digital database and only approximates weather conditions in highly varying terrain. Please relay any comments you have to the NWS via email at rnk.webmaster@noaa.gov. Below is a weather element key for this product. (Note...winds do not reflect local terrain effects.) 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(CATEGORY)....................Cloud cover category EXAMPLE: CL = CLEAR; FW = FEW; SC = Scattered; BK = Broken; OV = Overcast CLOUDS(%)...........................Cloud cover as a percentage VSBY................................Visibility value in statute miles 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(CATEGORY).......................Lightning Activity Level HAINES(CATEGORY)....................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 STABILITY (CATEGORY)................Pasquill Turner Stability CEILING (FT)........................Ceiling STA PRES (INCHES MERCURY)...........Station pressure 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(CATEGORY)................Average Cloud Cover Category POP 12HR(%).........................Probability for accumulating precipitation WEATHER.............................See Day 1 through 3 weather descriptions