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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
801 AM EDT Wed Apr 22 2026
VAZ024-222000-
RAWS 441631
37.63N 79.51W Elev. 865 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 77 50 84 54 86
TEMP 67 73 77 71 61 57 53 54 74 82 83 75 65 58 54 57 77 84 85 77
DEWPT 43 46 47 46 47 46 45 47 51 50 50 49 49 50 49 51 52 49 48 50
MAX/MIN RH 36 82 31 86 27
RH 42 38 35 41 60 67 74 77 44 33 32 40 56 75 83 80 42 30 28 39
WIND DIR W W W W SW W W W NW W W W NW NW NW NW W W W W
WIND SPD 8 10 9 4 2 1 1 1 2 3 3 2 1 1 1 1 2 4 3 2
WIND GUST 20 24 21 14
CLOUDS B2 B2 B1 FW FW FW FW FW FW SC SC FW FW FW FW FW FW SC SC B1
CLOUDS(%) 74 83 53 21 14 13 11 19 8 38 38 13 14 8 7 16 18 48 48 51
VSBY 10 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 5 10 10 10
RAIN SHWRS IS IS
TSTMS IS
MIX HGT 5 5 5 <1 <1 <1 <1 <1 4 7 7 <1 <1 <1 <1 <1 7 9 9 <1
T WIND DIR W W W W W NW NW NW NW W W W W NW NW NW NW W W W
T WIND SPD 26 20 18 8 3 3 3 2 14 10 11 4 4 3 3 2 14 18 13 4
DISPERSION VP VP VP VP VP VP VP VP VP
ADI 106 85 77 4 2 2 2 2 83 90101 2 2 2 2 2128193134 2
MAX LVORI 1 1 1 2 3 3 4 4 1 1 1 2 3 3 5 4 1 1 1 2
STABILITY C C C F G G G A A A A G G G G A A A A F
CEILING 11100 None None None None None None None None None
STA PRES 28.56 28.53 28.54 28.54 28.54 28.45 28.47 28.44 28.44 28.37
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 51 72 49 72 53 75
TEMP 62 57 76 69 56 52 68 64 53 50 69 66 56 54 70 70
DEWPT 50 52 56 55 51 48 48 45 44 44 46 45 48 51 57 54
RH 65 83 50 61 83 86 49 50 71 80 44 47 74 90 63 57
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS B1 B1 B2 B2 B2 B1 B1 SC SC B1 B1 SC B1 B2 B2 B2
POP 12HR 30 80 60 30 20 20 60 70
RAIN SHWRS SC SC SC O NM SC SC SC IS IS IS SC NM NM NM
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