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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Wed Apr 22 2026
NCZ003-222000-
RAWS 310302
36.35N 80.48W Elev. 1076 ft
801 AM EDT Wed Apr 22 2026
Date Wed 04/22/26 Thu 04/23/26 Fri 04/24/26
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 80 52 82 55 83
TEMP 66 78 79 71 63 57 53 56 73 80 81 75 66 59 56 58 75 80 82 75
DEWPT 41 37 39 41 42 41 41 41 46 45 44 45 47 48 46 47 49 47 47 49
MAX/MIN RH 23 63 27 72 29
RH 40 23 24 34 46 55 64 57 38 29 27 34 50 67 69 67 40 31 29 40
WIND DIR W W W W NW NW NW NW NW W W W NW NW NW NW W SW W W
WIND SPD 9 10 10 6 5 4 4 3 4 4 4 4 4 3 3 3 4 5 5 5
WIND GUST 19 23 21
CLOUDS FW FW SC SC FW FW CL CL CL FW SC SC FW FW FW FW FW SC SC SC
CLOUDS(%) 12 16 32 42 20 22 4 5 4 15 33 33 16 14 14 19 21 33 42 31
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 10 5 5 5 5
MIX HGT 5 9 9 <1 <1 <1 <1 <1 5 9 7 <1 <1 <1 <1 <1 7 11 9 <1
T WIND DIR W W W W SW NW NW NW NW W W SW W W NW NW NW W W W
T WIND SPD 20 19 17 3 1 2 3 3 11 9 10 4 3 2 2 2 9 11 8 3
DISPERSION PR PR VP VP VP VP VP VP PR
ADI 117169150 2 1 1 2 3 74 96 86 2 2 1 1 2 73128 89 2
MAX LVORI 1 1 1 2 2 3 3 3 1 1 1 2 2 3 3 3 1 1 1 2
STABILITY B B B E F F F A A A A F F G G A A A A F
CEILING None None None None None None None None None None
STA PRES 29.06 28.97 28.99 29.00 29.01 28.92 28.92 28.90 28.89 28.83
Date Sat 04/25/26Sun 04/26/26Mon 04/27/26Tue 04/28/26
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 57 80 53 72 50 70 56 76
TEMP 61 60 76 70 57 54 68 65 53 52 67 66 58 57 71 72
DEWPT 50 50 55 57 54 51 49 47 46 45 47 48 51 54 59 55
RH 67 69 48 63 90 90 51 52 77 77 49 52 77 90 66 55
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC B1 B2 B2 B1 B1 SC SC SC B2 B1 B1 B2 B2 B1
POP 12HR 10 70 50 30 20 20 50 70
RAIN SHWRS SC NM SC SC IS SC IS IS IS IS SC SC NM SC
TSTMS SC 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