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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
531 PM EDT Fri May 1 2026
NCZ003-020800-
RAWS 310301
36.48N 80.86W Elev. 1300 ft
531 PM EDT Fri May 1 2026
Date 05/01/26 Sat 05/02/26 Sun 05/03/26 Mon
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 45 63 38 67 42
TEMP 61 54 50 48 46 52 58 61 56 48 43 40 43 55 63 66 60 49 45 44 48
DEWPT 42 42 40 37 35 33 32 31 31 30 30 30 32 31 32 33 35 33 34 33 37
MIN/MAX RH 69 32 67 30 69
RH 49 64 68 65 65 48 37 32 38 49 60 67 65 40 31 29 39 54 65 65 65
WIND DIR SW NW N N N N N N NW NW NW NW NW NW W W W W NW W W
WIND SPD 3 3 5 5 4 5 5 5 5 3 2 1 2 4 4 4 2 2 1 1 1
CLOUDS B2 B2 B2 OV OV OV B2 SC FW FW FW FW FW CL FW CL CL FW FW SC SC
CLOUDS(%) 80 87 84 89 92 93 76 26 17 11 11 13 13 4 6 4 5 14 22 26 37
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 30 5 0 5
RAIN SHWRS IS IS IS
MIX HGT <1 <1 1 1 2 3 6 8 <1 <1 <1 <1 2 5 7 7 <1
T WIND DIR S SW N N N N N N NW NW NW NW NW NW W W SW
T WIND SPD 8 2 14 16 14 17 18 20 10 10 9 10 12 13 12 12 6
DISPERSION VP VP PR PR PR VP VP VP VP VP VP VP
ADI 5 1 12 13 43 66117190 7 5 3 3 29 84 94102 2
MAX LVORI 2 3 3 3 1 1 1 1 2 2 3 3 2 1 1 1 2
STABILITY F F E E C B B A F G G G A A A A G
CEILING 4700 5700 7200 None None None None None None
STA PRES 27.99 28.01 28.03 27.97 28.08 28.15 28.18 28.10
Date 05/04Tue 05/05/26Wed 05/06/26Thu 05/07/26Fri 05/08/26
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 75 47 79 54 79 56 74 44 69
TEMP 71 68 52 52 77 73 60 56 74 73 62 58 71 64 50 47 66 62
DEWPT 46 48 45 46 46 47 48 51 57 56 55 56 54 46 41 40 42 42
RH 41 49 77 80 33 40 64 83 55 55 78 93 55 52 71 76 42 48
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC SC SC SC FW SC B1 B1 B2 B2 B2 B2 B2 B1 SC SC SC SC
POP 12HR 10 0 5 30 50 70 60 20 10
RAIN SHWRS SC SC SC SC NM NM SC IS IS
TSTMS SC 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