Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE Blacksburg VA 801 PM EDT Sun Sep 21 2025 NCZ003-220800- RAWS 310301 36.48N 80.86W Elev. 1300 ft 801 PM EDT Sun Sep 21 2025 Date 09/21/25 Mon 09/22/25 Tue 09/23/25 Wed 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 58 81 59 85 61 TEMP 66 63 61 62 72 78 79 72 65 61 59 60 77 84 81 73 67 65 62 63 DEWPT 61 61 60 60 64 65 65 64 62 60 58 59 64 64 65 65 63 62 60 62 MIN/MAX RH 100 62 98 51 97 RH 84 93 97 93 76 64 62 76 90 97 96 96 64 51 58 76 87 90 93 97 WIND DIR E N N S S SE S N N N N N SW SW SW W N N N NW WIND SPD 1 0 0 1 2 2 2 0 0 0 0 0 2 4 3 1 0 0 0 1 CLOUDS SC B1 B1 B1 B2 SC SC SC SC SC SC SC SC SC SC SC SC B1 B1 B1 CLOUDS(%) 34 65 63 67 73 48 37 33 42 31 26 27 28 35 50 39 42 55 53 56 VSBY 10 10 7 5 10 10 10 10 10 10 9 10 10 10 10 10 POP 12HR 10 20 5 30 10 RAIN SHWRS IS SC SC TSTMS IS SC IS Obvis PF PF MIX HGT <1 <1 <1 <1 2 4 4 <1 <1 <1 <1 <1 2 5 4 <1 T WIND DIR SE SE N S SW S S S S W W W SW SW W SW T WIND SPD 2 1 0 3 6 6 10 3 2 2 2 2 11 11 12 3 DISPERSION VP VP VP VP VP VP VP VP VP VP VP ADI 1 1 0 3 18 32 48 2 1 1 1 2 33 69 54 2 MAX LVORI 5 8 9 8 3 3 1 4 7 8 8 8 1 1 1 4 STABILITY G F F C C B B G F G G A B B B G CEILING None 2300 1100 None None None None None None STA PRES 28.25 28.24 28.24 28.16 28.16 28.16 28.17 28.12 Date 09/24Thu 09/25/25Fri 09/26/25Sat 09/27/25Sun 09/28/25 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 84 63 77 62 75 60 77 58 78 TEMP 82 71 64 65 76 69 65 64 74 67 62 61 75 69 60 60 77 67 DEWPT 66 68 64 65 69 69 65 64 68 67 62 61 63 64 60 59 63 62 RH 58 90100100 79100100100 82100100100 66 84100 96 62 84 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS B1 B1 B2 B2 B2 B2 OV B2 B2 B2 B1 B1 B1 SC SC SC SC SC POP 12HR 40 40 70 70 70 40 40 20 30 RAIN SHWRS SC SC SC SC NM NM NM NM NM SC SC SC SC IS IS IS SC TSTMS SC IS SC IS 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 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