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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
501 AM EDT Wed Apr 22 2026
VAZ012-222000-
RAWS 447502
37.01N 81.18W Elev. 2540 ft
501 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 74 47 78 49 79
TEMP 51 68 72 72 63 56 50 47 52 73 77 75 67 57 52 50 53 73 77 78 70
DEWPT 38 39 39 38 38 39 37 37 39 44 43 43 43 44 42 41 43 44 43 43 44
MAX/MIN RH 27 68 30 76 29
RH 61 34 30 29 39 53 61 68 61 35 30 32 42 62 69 71 69 35 30 29 39
WIND DIR W W W NW NW NW W NW W NW NW W W W W W W W W W W
WIND SPD 6 8 6 6 3 2 2 2 2 3 3 3 2 1 1 2 2 2 3 3 2
WIND GUST 19 18 17
CLOUDS B1 B1 B2 B1 FW FW CL CL FW CL FW SC FW FW FW FW FW FW SC SC SC
CLOUDS(%) 58 61 70 65 24 13 4 5 10 2 22 26 11 9 14 22 19 19 39 31 29
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 20 5 5 5 5
MIX HGT <1 5 6 7 <1 <1 <1 <1 <1 5 7 5 <1 <1 <1 <1 <1 8 9 8 <1
T WIND DIR W W W W NW W W W W NW W W W W W W W W W W W
T WIND SPD 10 32 26 20 6 3 5 5 4 16 11 11 4 4 4 4 3 12 14 11 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 8128118 96 3 2 3 3 4 99 98 66 2 2 2 2 3116148107 2
MAX LVORI 3 1 1 1 2 2 3 3 3 1 1 1 2 3 3 3 3 1 1 1 2
STABILITY C C C C G G G G A A A A G G G G A A A A G
CEILING 17300 None None None None None None None None None
STA PRES 27.34 27.29 27.30 27.31 27.32 27.24 27.24 27.21 27.21 27.15
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 53 74 47 72 45 70 52 74
TEMP 56 56 71 64 52 50 69 62 49 48 68 62 54 54 71 65
DEWPT 47 49 52 51 49 47 44 43 43 42 44 44 47 50 54 50
RH 72 77 51 63 89 89 40 50 80 80 42 52 77 86 55 58
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B2 OV B2 B1 B1 B1 B1 SC B1 B1 B1 B2 B2 B2
POP 12HR 30 90 40 30 20 30 70 80
RAIN SHWRS IS SC NM O SC SC SC SC IS IS IS SC SC NM O NM
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