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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
501 AM EDT Wed Apr 22 2026
VAZ018-222000-
RAWS 444002
37.56N 80.18W Elev. 2702 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 73 53 80 55 82
TEMP 57 68 70 73 66 59 56 54 57 72 78 79 71 62 57 55 58 77 81 79 70
DEWPT 39 41 45 45 43 43 43 42 45 49 48 47 47 46 46 45 47 49 47 47 48
MAX/MIN RH 37 68 32 70 29
RH 51 37 41 37 43 55 62 64 64 44 35 32 42 56 67 69 67 37 30 32 45
WIND DIR W W W W NW NW NW NW NW NW NW NW W W W W W W W W W
WIND SPD 8 12 11 10 5 3 2 2 2 4 4 3 2 2 1 2 2 3 4 4 2
WIND GUST 29 35 32 28 20 16 13 12 13 17 14 13 16 16
CLOUDS B2 B2 B2 B2 FW FW FW FW FW FW SC SC FW FW FW FW FW FW SC SC SC
CLOUDS(%) 71 75 84 70 18 17 7 8 8 7 33 33 8 7 7 15 17 21 35 43 45
VSBY 10 10 7 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
POP 12HR 30 10 10 5 10
RAIN SHWRS IS
TSTMS IS
MIX HGT <1 4 4 3 <1 <1 <1 <1 <1 4 7 7 <1 <1 <1 <1 <1 7 9 8 <1
T WIND DIR W W W W W W W W W NW W W W W W W W W W W W
T WIND SPD 8 34 26 23 6 4 4 4 4 17 12 12 11 3 3 4 3 13 17 14 9
DISPERSION PR VP VP VP VP VP VP VP VP
ADI 8100 73 75 3 2 2 2 4 95104102 5 2 2 2 3121180131 4
MAX LVORI 2 1 1 1 2 3 3 3 3 1 1 1 2 3 3 3 3 1 1 1 2
STABILITY C D D C F G G G A A A A G G G G A A A A F
CEILING 9600 None None None None None None None None None
STA PRES 27.85 27.82 27.83 27.83 27.84 27.75 27.76 27.74 27.73 27.67
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 59 76 52 71 49 70 54 74
TEMP 60 61 73 67 56 52 68 62 52 50 67 62 55 55 69 67
DEWPT 47 52 55 52 49 47 46 45 43 42 46 44 46 50 56 51
RH 62 72 53 59 77 83 45 54 71 74 47 52 72 83 63 56
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS SC B1 B2 OV B1 B1 B1 SC B1 B1 B1 B1 B1 B2 B2 B2
POP 12HR 30 80 50 30 20 30 60 70
RAIN SHWRS IS SC NM O SC SC SC SC IS IS SC 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