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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
431 AM EDT Sat Apr 25 2026
NCZ005-252000-
RAWS 310540
36.38N 79.70W Elev. 858 ft
431 AM EDT Sat Apr 25 2026
Date Sat 04/25/26 Sun 04/26/26 Mon 04/27/26
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 85 56 66 45 71
TEMP 58 60 79 84 80 71 64 62 59 58 60 63 66 59 53 49 46 48 59 68 71 65
DEWPT 49 51 55 52 54 58 59 59 58 57 56 52 49 46 44 44 42 42 42 41 41 42
MAX/MIN RH 33 96 54 87 34
RH 72 72 44 33 41 63 84 90 96 96 87 67 54 62 71 83 86 80 53 37 34 43
WIND DIR SW SW SW SW W W W W NW N NE NE NE NE NE NE NE NE NE NE NE E
WIND SPD 2 2 4 8 8 4 3 3 4 6 10 11 11 10 9 6 6 8 8 8 6 4
CLOUDS FW FW FW B1 B2 OV OV B2 B1 B2 B2 B1 B1 SC SC SC SC SC FW FW FW FW
CLOUDS(%) 9 21 21 52 86100 91 79 63 76 78 64 52 32 32 35 45 33 20 11 11 10
VSBY 10 10 10 10 9 8 6 6 6 6 6 7 7 10 10 10 10 10 10 10 10 10
POP 12HR 80 80 30 10 5
RAIN SHWRS NM O SC SC SC SC IS IS IS
TSTMS SC SC SC
MIX HGT <1 <1 5 9 3 <1 <1 <1 <1 1 2 3 4 <1 <1 <1 <1 2 3 4 4 <1
T WIND DIR SW SW SW SW W NW W SW SW N NE NE NE NE NE NE NE NE NE NE E E
T WIND SPD 3 2 6 11 11 12 2 8 2 11 17 13 17 17 17 12 9 13 9 6 5 9
DISPERSION VP VP VP VP VP FR PR PR PR VP
ADI 2 2 41 59 37 11 1 4 2 20 45 35 49 12 12 6 6 29 37 34 29 4
MAX LVORI 3 3 1 1 1 2 5 6 8 5 4 3 1 2 3 4 5 3 1 1 2 2
STABILITY G A A C C D F F E C C D D E E F E B B B B F
CEILING None 5700 6400 4000 1300 None None None None None
STA PRES 29.07 29.01 29.07 29.09 29.19 29.26 29.39 29.42 29.47 29.42
Date Tue 04/28/26Wed 04/29/26Thu 04/30/26Fri 05/01/26
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 46 69 54 76 53 72 46 69
TEMP 50 49 67 67 57 56 74 70 59 55 70 66 50 49 67 63
DEWPT 43 43 49 52 53 55 59 59 56 52 44 39 39 40 40 43
RH 77 80 52 59 86 96 59 68 90 90 39 37 66 71 37 48
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW SC B2 B1 B1 B1 B1 B2 B1 SC SC SC FW SC B1 B1
POP 12HR 10 40 20 60 30 20 20 40
RAIN SHWRS SC IS IS SC NM SC IS IS IS SC SC
TSTMS SC 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