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EXPERIMENTAL...FIRE WEATHER POINT FORECAST MATRICES
NATIONAL WEATHER SERVICE Blacksburg VA
631 PM EDT Mon Apr 20 2026
VAZ018-210800-
RAWS 444002
37.56N 80.18W Elev. 2702 ft
631 PM EDT Mon Apr 20 2026
Date 04/20/26 Tue 04/21/26 Wed 04/22/26 Thu
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 29 73 50 76 51
TEMP 48 41 37 33 37 54 65 72 60 54 53 51 56 68 74 73 64 58 53 51 55
DEWPT 20 17 17 17 19 22 25 31 35 37 39 39 41 44 44 44 43 43 43 42 45
MIN/MAX RH 60 21 64 33 75
RH 33 37 44 51 48 28 22 22 39 52 59 63 57 42 34 35 46 57 69 71 69
WIND DIR NW N NW W SW S SW SW S SW W W W W W W W W W W W
WIND SPD 5 3 1 1 1 3 5 6 4 5 6 6 9 12 13 11 6 4 3 3 3
WIND GUST 16 18 20 24 29 27 25 17
CLOUDS CL CL FW CL FW CL FW FW SC SC SC SC B1 B1 B1 B1 SC FW FW FW FW
CLOUDS(%) 3 4 6 5 6 5 11 19 27 36 35 48 58 53 61 58 29 14 11 10 10
VSBY 10 10 10 10 10 10 10 10 10 10 10 10 10 9 9 9 9 9 10 9 10
POP 12HR 0 0 0 20 10
RAIN SHWRS IS IS IS IS
MIX HGT 1 <1 <1 <1 <1 3 5 6 <1 <1 <1 <1 <1 4 7 3 <1
T WIND DIR NW N W W S SW SW SW S SW W W W W W NW NW
T WIND SPD 17 5 2 1 5 6 10 16 6 6 6 6 12 39 33 31 16
DISPERSION PR VP VP VP VP PR PR PR PR VP VP VP
ADI 12 3 1 1 6 26 59106 3 3 3 5 12114115 75 7
MAX LVORI 2 2 2 2 2 2 1 1 2 2 3 3 2 1 1 1 2
STABILITY E G G G A A A B F F F E C D D D F
CEILING None None None None None None None None None
STA PRES 28.01 28.04 28.05 27.90 27.86 27.80 27.81 27.80
Date 04/23Fri 04/24/26Sat 04/25/26Sun 04/26/26Mon 04/27/26
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 82 54 82 59 78 55 75 53 68
TEMP 79 71 59 57 79 72 61 60 75 69 58 57 72 66 57 55 65 63
DEWPT 47 46 45 47 47 47 47 51 54 52 50 50 50 49 47 49 52 50
RH 32 41 60 69 32 41 60 72 48 55 75 77 46 54 69 80 63 62
WIND SPD <15 <15 <15 <15 <15 <15 <15 <15 <15
AVG CLOUDS FW FW FW FW FW SC SC SC B1 B2 B1 B1 B1 B1 B1 B1 B1 B2
POP 12HR 5 5 10 20 60 50 50 40 50
RAIN SHWRS IS SC NM SC SC SC SC SC SC SC SC
TSTMS 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