Print This Forecast (Printer-Friendly)
EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES NATIONAL WEATHER SERVICE Blacksburg VA 231 AM EDT Wed May 21 2025 NCZ003-220800- RAWS 310302 36.35N 80.48W Elev. 1076 ft 231 AM EDT Wed May 21 2025 Date 05/20/25 Wed 05/21/25 Thu 05/22/25 Fri 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 63 82 56 74 51 TEMP 65 65 74 80 80 71 64 59 56 59 68 72 74 68 59 53 51 53 DEWPT 62 63 65 61 57 54 51 49 49 50 49 48 47 46 46 45 44 44 MIN/MAX RH 97 45 78 39 77 RH 90 93 74 52 45 55 63 69 77 72 51 42 38 45 62 74 77 71 WIND DIR S W W W W W W W W W W W W W NW W NW NW WIND SPD 3 4 5 8 10 10 9 8 8 9 10 11 11 11 10 8 8 9 WIND GUST 20 23 24 24 CLOUDS OV B2 SC SC SC CL CL CL FW SC SC FW FW FW FW FW FW FW CLOUDS(%) 97 71 49 32 31 4 3 5 9 28 26 15 22 21 11 12 7 11 VSBY 7 8 10 10 10 10 10 10 10 10 10 10 10 10 POP 12HR 70 20 0 20 10 RAIN SHWRS SC IS IS IS TSTMS IS IS IS MIX HGT <1 <1 4 6 5 <1 <1 <1 <1 2 6 7 7 <1 T WIND DIR E S W W W W W W W W W W W SW T WIND SPD 2 1 11 17 19 11 5 5 3 6 19 23 23 6 DISPERSION VP FR PR PR PR FR FR PR PR ADI 1 1 54118113 8 4 4 2 17125111110 5 MAX LVORI 8 8 3 1 1 3 3 3 4 3 1 1 1 2 STABILITY F C A B B E E E E B B C C E CEILING 500 None None None None None None None STA PRES 28.72 28.69 28.69 28.77 28.81 28.84 28.78 Date 05/23Sat 05/24/25Sun 05/25/25Mon 05/26/25Tue 05/27/25 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 68 48 72 52 71 57 73 58 72 TEMP 65 62 49 51 69 67 55 55 69 67 59 59 71 69 62 58 70 68 DEWPT 40 39 39 42 44 46 45 47 53 55 53 54 57 57 57 58 60 57 RH 40 43 68 71 40 47 69 74 57 65 80 83 61 66 84100 71 68 WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15 AVG CLOUDS FW FW FW FW SC SC SC B1 B1 B1 B1 B1 B1 B1 B1 B2 B2 B1 POP 12HR 5 0 5 20 40 40 50 60 50 RAIN SHWRS IS SC SC SC SC SC SC SC NM SC SC TSTMS 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